文献翻译中英对照
企业资金管理中英文对照外文翻译文献
企业资金管理中英文对照外文翻译文献(文档含英文原文和中文翻译)An Analysis of Working Capital Management Results Across IndustriesAbstractFirms are able to reduce financing costs and/or increase the fund s available for expansion by minimizing the amount of funds tied upin current assets. We provide insights into the performance of surv eyed firms across key components of working capital management by usi ng the CFO magazine’s annual Working CapitalManagement Survey. We discover that significant differences exist b etween industries in working capital measures across time.In addition.w e discover that these measures for working capital change significantl y within industries across time.IntroductionThe importance of efficient working capital management is indisputa ble. Working capital is the difference between resources in cash or readily convertible into cash (Current Assets) and organizational commi tments for which cash will soon be required (Current Liabilities). Th e objective of working capital management is to maintain the optimum balance of each of the working capital components. Business viabilit y relies on the ability to effectively manage receivables. inventory.a nd payables. Firms are able to reduce financing costs and/or increase the funds available for expansion by minimizing the amount of funds tied up in current assets. Much managerial effort is expended in b ringing non-optimal levels of current assets and liabilities back towa rd optimal levels. An optimal level would be one in which a balance is achieved between risk and efficiency.A recent example of business attempting to maximize working capita l management is the recurrent attention being given to the applicatio n of Six Sigma®methodology. Six S igma®methodologies help companies measure and ensure quality in all areas of the enterprise. When used to identify and rectify discrepancies.inefficiencies and erroneous tra nsactions in the financial supply chain. Six Sigma®reduces Days Sale s Outstanding (DSO).accelerates the payment cycle.improves customer sati sfaction and reduces the necessary amount and cost of working capital needs. There appear to be many success stories including Jennifertwon’s(2002) report of a 15percent decrease in days that sales are outstanding.resulting in an increased cash flow of approximately $2 million at Thibodaux Regional Medical Cenrer.Furthermore bad debts declined from 3.4millin to $6000000.However.Waxer’s(2003)study of multiple firms employing Six Sig ma®finds that it is really a “get rich slow”technique with a r ate of return hovering in the 1.2 – 4.5 percent range.Even in a business using Six Sigma®methodology. an “optimal”level of working capital management needs to be identified. Industry factors may impa ct firm credit policy.inventory management.and bill-paying activities. S ome firms may be better suited to minimize receivables and inventory. while others maximize payables. Another aspect of “optimal”is the extent to which poor financial results can be tied to sub-optimal pe rformance.Fortunately.these issues are testable with data published by CFO magazine. which claims to be the source of “tools and informati on for the financial executive.”and are the subject of this resear ch.In addition to providing mean and variance values for the working capital measures and the overall metric.two issues will be addressed in this research. One research question is. “are firms within a p articular industry clustered together at consistent levels of working capital measures?For instance.are firms in one industry able to quickl y transfer sales into cash.while firms from another industry tend to have high sales levels for the particular level of inventory . The other research question is. “does working capital management perform ance for firms within a given industry change from year-to-year?”The following section presents a brief literature review.Next.the r esearch method is described.including some information about the annual Working Capital Management Survey published by CFO magazine. Findings are then presented and conclusions are drawn.Related LiteratureThe importance of working capital management is not new to the f inance literature. Over twenty years ago. Largay and Stickney (1980) reported that the then-recent bankruptcy of W.T. Grant. a nationwide chain of department stores.should have been anticipated because the co rporation had been running a deficit cash flow from operations for e ight of the last ten years of its corporate life.As part of a stud y of the Fortune 500s financial management practices. Gilbert and Rei chert (1995) find that accounts receivable management models are used in 59 percent of these firms to improve working capital projects.wh ile inventory management models were used in 60 percent of the compa nies.More recently. Farragher. Kleiman and Sahu (1999) find that 55 p ercent of firms in the S&P Industrial index complete some form of a cash flow assessment. but did not present insights regarding account s receivable and inventory management. or the variations of any curre nt asset accounts or liability accounts across industries.Thus.mixed ev idence exists concerning the use of working capital management techniq ues.Theoretical determination of optimal trade credit limits are the s ubject of many articles over the years (e.g. Schwartz 1974; Scherr 1 996).with scant attention paid to actual accounts receivable management.Across a limited sample. Weinraub and Visscher (1998) observe a tend ency of firms with low levels of current ratios to also have low l evels of current liabilities. Simultaneously investigating accounts rece ivable and payable issues.Hill. Sartoris.and Ferguson (1984) find diffe rences in the way payment dates are defined. Payees define the date of payment as the date payment is received.while payors view paymen t as the postmark date.Additional WCM insight across firms.industries.a nd time can add to this body of research.Maness and Zietlow (2002. 51. 496) presents two models of value creation that incorporate effective short-term financial management acti vities.However.these models are generic models and do not consider uni que firm or industry influences. Maness and Zietlow discuss industry influences in a short paragraph that includes the observation that. “An industry a company is located in may have more influence on th at company’s fortunes than overall GNP”(2002. 507).In fact. a car eful review of this 627-page textbook finds only sporadic information on actual firm levels of WCM dimensions.virtually nothing on industr y factors except for some boxed items with titles such as. “Should a Retailer Offer an In-House Credit Card”(128) and nothing on WC M stability over time. This research will attempt to fill this void by investigating patterns related to working capital measures within industries and illustrate differences between industries across time.An extensive survey of library and Internet resources provided ver y few recent reports about working capital management. The most relev ant set of articles was Weisel and Bradley’s (2003) article on cash flow management and one of inventory control as a result of effect ive supply chain management by Hadley (2004).Research Method The CFO RankingsThe first annual CFO Working Capital Survey. a joint project with REL Consultancy Group.was published in the June 1997 issue of CFO (Mintz and Lezere 1997). REL is a London. England-based management co nsulting firm specializing in working capital issues for its global l ist of clients. The original survey reports several working capital b enchmarks for public companies using data for 1996. Each company is ranked against its peers and also against the entire field of 1.000 companies. REL continues to update the original information on an a nnual basis.REL uses the “cash flow from operations”value located on firm cash flow statements to estimate cash conversion efficiency (CCE). T his value indicates how well a company transforms revenues into cash flow. A “days of working capital”(DWC) value is based on the d ollar amount in each of the aggregate.equally-weighted receivables.inven tory.and payables accounts. The “days of working capital”(DNC) repr esents the time period between purchase of inventory on acccount fromvendor until the sale to the customer.the collection of the receiva bles. and payment receipt.Thus.it reflects the companys ability to fin ance its core operations with vendor credit. A detailed investigation of WCM is possible because CFO also provides firm and industry val ues for days sales outstanding (A/R).inventory turnover.and days payabl es outstanding (A/P).Research FindingsAverage and Annual Working Capital Management Performance Working capital management component definitions and average values for the entire 1996 –2000 period .Across the nearly 1.000 firms in the survey.cash flow from operations. defined as cash flow from operations divided by sales and referred to as “cash conversion ef ficiency”(CCE).averages 9.0 percent.Incorporating a 95 percent confide nce interval. CCE ranges from 5.6 percent to 12.4 percent. The days working capital (DWC). defined as the sum of receivables and invent ories less payables divided by daily sales.averages 51.8 days and is very similar to the days that sales are outstanding (50.6).because the inventory turnover rate (once every 32.0 days) is similar to the number of days that payables are outstanding (32.4 days).In all ins tances.the standard deviation is relatively small.suggesting that these working capital management variables are consistent across CFO report s.Industry Rankings on Overall Working Capital Management Perfo rmanceCFO magazine provides an overall working capital ranking for firms in its ing the following equation:Industry-based differences in overall working capital management are presented for the twenty-s ix industries that had at least eight companies included in the rank ings each year.In the typical year. CFO magazine ranks 970 companies during this period. Industries are listed in order of the mean ove rall CFO ranking of working capital performance. Since the best avera ge ranking possible for an eight-company industry is 4.5 (this assume s that the eight companies are ranked one through eight for the ent ire survey). it is quite obvious that all firms in the petroleum in dustry must have been receiving very high overall working capital man agement rankings.In fact.the petroleum industry is ranked first in CCE and third in DWC (as illustrated in Table 5 and discussed later i n this paper).Furthermore.the petroleum industry had the lowest standar d deviation of working capital rankings and range of working capital rankings. The only other industry with a mean overall ranking less than 100 was the Electric & Gas Utility industry.which ranked secon d in CCE and fourth in DWC. The two industries with the worst work ing capital rankings were Textiles and Apparel. Textiles rank twenty-s econd in CCE and twenty-sixth in DWC. The apparel industry ranks twenty-third and twenty-fourth in the two working capital measures ConclusionsThe research presented here is based on the annual ratings of wo rking capital management published in CFO magazine. Our findings indic ate a consistency in how industries “stack up”against each other over time with respect to the working capital measures.However.the wor king capital measures themselves are not static (i.e.. averages of wo rking capital measures across all firms change annually); our results indicate significant movements across our entire sample over time. O ur findings are important because they provide insight to working cap ital performance across time. and on working capital management across industries. These changes may be in explained in part by macroecono mic factors Changes in interest rates.rate of innovation.and competitio n are likely to impact working capital management. As interest rates rise.there would be less desire to make payments early.which would stretch accounts payable.accounts receivable.and cash accounts. The ra mifications of this study include the finding of distinct levels of WCM measures for different industries.which tend to be stable over ti me. Many factors help to explain this discovery. The improving econom y during the period of the study may have resulted in improved turn over in some industries.while slowing turnover may have been a signal of troubles ahead. Our results should be interpreted cautiously. Our study takes places over a short time frame during a generally impr oving market. In addition. the survey suffers from survivorship bias –only the top firms within each industry are ranked each year and the composition of those firms within the industry can change annua lly.Further research may take one of two lines.First.there could bea study of whether stock prices respond to CFO magazine’s publication of working capital management rating.Second,there could be a study of which if any of the working capital management components relate to share price performance.Given our results,there studies need to take industry membership into consideration when estimating stock price reaction to working capital management performance.对整个行业中营运资金管理的研究格雷格Filbeck.Schweser学习计划托马斯M克鲁格.威斯康星大学拉克罗斯摘要:企业能够降低融资成本或者尽量减少绑定在流动资产上的成立基金数额来用于扩大现有的资金。
盘式制动器中英文对照外文翻译文献
中英文对照外文翻译文献(文档含英文原文和中文翻译)外文：An Experimental Analysis of Brake Efficiency Using fourFluids in a Disc Brake SystemABSTRACTThe paper studies disc brake failure in Mini-buses using an experimental analysis to test the maximum braking force when different brake fluids such as clean, less dirty, dirty and soapy water solution were used in the braking system. The experimental results clearly showed that the soap solution appears to be the best fluid as far as low viscosity and stability of viscosity with increase in temperature are concerned. However, the soap solution is not compatible with other fluid which makes it difficult to be substitute as a clean brake fluid. The result of the Thepra Universal Brake Testing Equipment used for the braking efficiency test indicated that a pedal brake of 117 kN produce a brake force of 0.96 kN for clean brake fluid, 0.91 kN for the less dirty, 0.85 kN for dirty and 1.44 kN forsoap solution. The value of 1.44 kN which was achieved when the soap solution was used indicated a positive braking force and the indicating that soap solution could be used to produce a high pedal force within a very short time (about 10-30 min) and can therefore be used only in case of emergency. The brake efficiency test indicated that under hot conditions the braking efficiency is reduced and the presence of air in the system renders the braking ineffective because higher pedal force was needed to be able to produce a significant braking force which is noted for causing brake failure.Keywords: Brake fade, brake failure, disc brake, efficiency, pedal force INTRODUCTIONWhen a vehicle is accelerated, energy supplied by the engine causes the vehicle’s speed to increase. Part of this energy is instantly used up in overcoming frictional and tractive resistance but a large amount of it remains stored in the vehicle. According to Heinz (1999) this energy of motion is called the kinetic energy and the existence of kinetic energy is observed when a vehicle is moving and neutral gear is selected. The vehicle does not immediately come to rest; instead it travels for a considerable distance before it becomes stationary. In this case the stored energy is used to drive the vehicle against the resistances that oppose the vehicle’s motion. Relying on these r esistances to slow down a vehicle could cause many problems, so an additional resistance called a brake is needed to convert the kinetic energy to heat energy at a faster rate in order to reduce the speed of the vehicle Mcphee and Johnson (2007). This reduces the speed of the vehicle at a faster rate and brings the vehicle to rest within the shortest possibletime when the brakes are applied.From the point of view of Johnson et al. (2003) most automotive systems in use today utilize front disc brakes, but four-wheel disc systems are also common In disc brakes, the rotor rotates with the wheel and the pads move out to rub the rotor when the brakes are applied. Most disc brakes use floating calipers. The caliper slides in and out as the brakes are applied and released. The piston moves the inside pad out and pushes the outside pad into the rotor by sliding the caliper back toward the rotor.The use of disc brakes to reduce speed or bring the vehicle to rest when in motion cannot be over emphasized if the safety of the occupant is to be guaranteed Heinz (1999). To bring a vehicle to a stop, the disc brakes have to absorb all the energy given to thevehicle by the engine and that due to the momentum of the vehicle. This energy must then be dissipated. In most vehicle disc brakes, the energy is absorbed by friction, converted into heat and the heat dissipated to the surrounding air (Thoms, 1988). As the energy is absorbed, the vehicle is slowed down; in other words, its motion is retarded. The brakes must also pull up the vehicle smoothly and in a straight line to bring the vehicle to a stop position.It is therefore very important that the disc brakes of vehicles operate with the highest efficiency. This couldreduce the rate of accidents due to brake failure so that life and property could be preserved and also to ensure that occupants of these commercial vehicles go about their normal lives without any fear of being involved in an accident. Available crash data in Ghana suggests that about 1,900 persons are killed annually in road traffic crashes (Afukaar et al., 2008) and that more than 40% of the road traffic fatalities are occupants of cars, buses and trucks. Most often than not, some of the road accidents involving commercial vehicles, such as the mini-buses have been attributed to the failure of the disc brakes. The reason for testing the viscosity of these brake fluids, especially that of the soap solution was as a result of the practice of most Ghanaian drivers sometimes using the soapy solution as a substitute to the original brake fluid in the braking system and also using dirty brake fluid which has been used for bleeding purposes. The main objective of this study which is part of a larger work seeks to investigate and establish the reasons for the disc brake failure due to brake fluid also check the efficiency of the four different types of fluids used in the transmission of braking forces. The study looked at the maximum braking force when using clean, less dirty, dirty and soapy water solution in the braking system. It also looked at the braking force when the braking system is with or without servo unit and operating under cold or hot condition with air or without air in the braking systemDISC BRAKESThe disc brake consists of an exposed disc which is attached to the hub flange; the two friction pads arepressed on to this disc to give a braking action. Figure 1a, shows the disk brake system of a car and pad that is separated from wheel assembly to better shows the disk and the pad in sliding contact. As it can be seen, typical disk brake system and caliper assembly of a solid disk brake rotor is completely noticeable. Figure 1b shows schematic form of the disk and the pad in sliding contact assembly.(a) (b)Fig. 1: Disc brakeThe pads are moved by hydraulic pistons working in cylinders formed in a caliper that is secured to a fixed part of the axle. When the hydraulic pressure is applied to the two cylinders held in the fixed caliper, the pistons move; this action forces the friction pads into contact with the rotating cast iron disc. The sandwiching action of the pads on the disc gives a retarding action and heat generated from the energy of motion is conducted to the disc.Greater part of the disc is exposed to the air; therefore heat is easily radiated, with the result that the brake can be used continuously for long periods before serious fade occurs. Since the friction pads move at a right angle to the disc, any drop in the friction value does not affect the force applied to the pad. As a result this type of brake is not less sensitive to heat (Mudd, 1972). The disc brake was developed to minimize the fade problems. When fading occurs, the driver has to apply a much larger effort and in extreme cases it becomes impossible to bring the vehicle to rest. No assistance is obtained from the rotating disc to aid the driver in the application of a disc brake to achieve a given retardation. A disc brake requires a greater pedal pressure and toachieve this pressure required the hydraulic braking system using a good quality brake fluid in its operation.The fluid used in the hydraulic braking systems is a vegetable oil with certain additives. According to Nunney et al. (1998) a good brake fluid should have the following requirements, low viscosity, high boiling point, compatibility with rubber components, lubricating properties, resistance to chemical ageing and compatibility with other fluids. However, mostGhanaian drivers sometimes used other fluid such as dirty brake fluid, less dirty fluid and even soapy water sometimes as a substituted to the original brake fluid. This study among other things will also investigate which of these brake fluid, clean, dirty, less dirty and soapy water will have the best viscosity, high boiling point and less braking force.MATERIALS AND METHODSThe design used for this study was experiment which employed the used of viscometer and Thepra Universal Automotive Brake Testing machine to check the efficiency of the four fluids in the transmission of braking forces.Laboratory analysis: The viscosity tests on the four different liquids were carried out at the Kwame Nkrumah University of Science and Technology (KNUST) Thermodynamics laboratory. The liquids were clean brake fluid, less dirty brake fluid, dirty brake fluid and soap solution. It was necessary to find out how the viscosity of different qualities of brake fluid affected braking efficiency and to find out whether there was any correlation between these and the occurrence of brake failure.Viscosity test on the various fluids used: The viscosity test was carried out on a Redwood Viscometer in Fig. 2 on the four different kinds of fluids to determine their viscosities. The apparatus consists of a vertical cylinder containing the fluid under test which was allowed to flow through a calibrated orifice situated at the centre of the cylinder base. The orifice is closed by a ball valve when it is not being used.Fig. 2: Redwood viscometer used to determine the viscosity of the fluidsThe oil cylinder is surrounded by a water jacket which maintains the lubricant under test at a required temperature by means of a Bunsen burner flame applied to the heating tube. The thermometer for the water in the jacket is mounted in a paddle-type stirrer which can be rotated by hand, using the handle (Zammit, 1987).Procedure for testing various viscosities of the fluids: To test the viscosity of a fluid, the water jacket was filled with water with the orifice ball valve in position. Fluid was poured into the cylinder to the level of the pointer. A 50 mL measuring flask was placed centrally under the orifice. The water was stirred gently until the water and fluid thermometers were the same (room temperature, 30ºC). Thetemperature was recorded. The ball valve was then raised and a stopwatch used to record the time (in seconds) for a 50 mL of fluid to flow into the measuring flask. The test was repeated with the fluid temperatures increasing by 10ºC each time up to 90ºC. All the data for the four differentfluids were recorded as shown in Table 1Thepra universal stand automotive brake testing equipment:The ThepraUniversal Stand Automotive brake testing equipment is structured in such a way that the driven part, such as brake disc, was plugged on to the motor shaft. The brake anchor plate and the caliper are fastened to a flange via a linkage of bar which is connected to the flange. The brake force is measured and displayed on a digital indicator. The individualunits are plugged into the two span-frames which are fastened to both sides. All the brake components used in the testing equipment are original vehicle components. The pedalforce is measured at the actuating linkage of the brake master cylinder and displayed on a digital indicator (Technolab, 2009)RESULTS AND DISCUSSIONExperimental results of viscosity test: Table 1 present the results of viscosity test inan experiment for the four fluids, using the Redwood Viscometer.From the test results obtained using Redwood viscometer, Viscosity-Temperature graphs for the fluids were plotted. Figure 3 shows the plot of viscosity againsttemperature of the four fluids.Table 1: Viscosity testValues of the various viscosities werecalculated using the formula:V = hfρgD232hfvwhere,V : The Viscosityhf : The capillary heightρ : The density of the fluidg : Acceleration due to gravityD : The diameter of the orificev : The velocity (Bird et al., 1960) Fig. 3: Viscosity-temperature relationship of the fluidsFrom Fig. 3 the dirty fluid has the highest viscosity followed by the less dirty fluid, clean fluid and soap solution in that order. From the results shown in Fig. 2 and theviscosity test shown in Table 1, the soap solution appear to be the best fluid as far as lowviscosity and stability of viscosity with increase in temperature are concerned. However, it is less compatible with other fluids, difficult to mix easily with other brake fluids and has a low boiling point which will not make it suitable to be substitute as clean brake fluid (Nunney et al., 1998).The clean brake fluid is next as far as viscosity and stability of viscosity with increase in temperature are concerned. On the other hand, it satisfies all the other requirements of a good fluid for the braking system given in Table 1. According to Mudd (1972) and Nunney et al. (1998), a good brake fluid should have properties such as high boiling point, compatibility with rubber components, good lubrication properties, resistance to chemical ageing (long shelf life) and compatibility with other fluids. The less dirty fluid is very unstable as far as viscosity change with temperature increase is concerned. It is therefore not very reliable in a braking system since its behavior changes as the braking system heats up. The viscosity of the dirty fluid is stable with increase in temperature, however, it is very viscous (235-178 kgs/m3 in the temperature range 30 to 90ºC). It will therefore not be good and effective in brake force transmission. From these results and literature, it is obvious that the clean brake fluid is more suitable for the transmission of braking force as it’s possess all the good brake fluid qualities.Experimental results of the disc brake system:These sections present the results and discussion of the experiments using the four fluids in a Disc brake system under different conditions. Test results for hot and cold conditions of the Disc brake system using a servo system and without using a servo system were considered.Disc brake in cold condition with and without servo unit: The result in Table 2 clearly shows the pedal force and the brake force for clean, less dirty, dirty and soap solution when using disc brake in cold condition with servo unit with the Thepra Universal Brake Testing Equipment. A pedal brake of 117 kN produce a brake force of 0.96 kN for a clean brake fluid,Table 2: Results of disc brake in cold condition with servoTable 3: Results of disc brake in hot condition with servo0.91 kN for the less dirty, 0.85 kN for dirty and 1.44 kN for soap solution. Comparatively, a maximum brake force is achieved when the fluid is clean. When there is the presence of dirt,the brake force decreases and therefore more pedal force is needed to take up thewithout servoloss created by the dirt.Hence the greater the dirt, the greater thepedal force required.The value of 1.44kN which wasachieved when the soap solution wasused indicated a positive braking force compared with all the three fluids at the same pedal force. Subsequent pedal forces applied as shown in Table 2 gave a reduction in the brake force when soap solution was used. The implication was that soap solution could be used to produce a high pedal force within a very short time (about 10-30 min) and can therefore be used in case of emergency.From Table 2, it can be observed that for the same pedal force of 117 KN the soap solution transmitted the highest amount of brake force followed by the clean fluid, less dirty fluid and dirty fluid in that order. This implies that in cold condition using servo, the soap solution performs best followed by the clean, less dirty and dirty respectively.Disc brake in hot condition with servo unit: When the experiment was carried out using a disc brake under the hot conditions with the introduction of a servo, a pedal force of 120 kN gave a brake force of 0.95 kN for clean fluid, 0.90 kN for less dirty, 0.85 kN for a dirty fluid and 0.19 KN for soap solution. The result could be explain that, the clean brake fluid gave the highest brake force follow by less dirty, dirty and soap solution. It was observed that the soap solution perform poorly at this time recording a brake force of 0.19 KN as shown in Table 3.Disc brake in hot condition without servo: Figure 4 shows a plot of disc brake inhot condition without servo unit. It can be observed that, under hot conditions for the disc brake without servo, the trend is generally the same. The soap solution performed very badly compare with the other fluids, unlike its performance under cold conditions. This may be due to evaporation of the fluid making the fluid compressible; as if air was in the braking system. Generally, the clean fluid performed best in terms of transmission of brake force followed by the less dirty, dirty and soap solution in that order.Disc brake with air in system under cold condition: Braking force for this experiment was generally low as compared with the case when air was not trapped in the system as shown in Table 4. When the experiment was conducted with a pedal force of 165 kN, braking force ofTable 4: Results of disc brake with air in system under cold condition with servoFig. 5: Results of disc brake with air in system under hot condition with servo0.32 kN soap solution was obtained, for 0.37 KN for dirty, 0.28 KN for less dirty and 0.30 kN for clean fluid. This is in line with literature because according to Mudd (1972) the presence of air in the braking system makes the system ineffective since much of the drivers effort will be used to compress the air leaving very little for the brake application.Again, the soap solution did not give the least braking force because when the system is cold, soap solution is effective and its density is higher since there is nooccurrence of evaporation of the solution.Disc brake with air in system under hot condition: The Fig. 5 shows the plot of a graph indicating disc brake with air in the system under hot condition clearly shows that, when a pedal force of 152 kN was applied, a brake force of 1.11 kN was obtained for clean, 0.37 kN for less dirty, 0.28 kN for dirty and 0.26 kN for soap solution. It was observed that the maximum brake force was attained when the fluid was clean and on the introduction of dirty fluid, the brake force reduced drastically, though the pedal force was very high at 152 kN in the hot condition.Soap solution provides the least brake force because the air content in the system increases due to evaporation and hence the pedal force compresses air rather than transmitting power. As the system heats up, the air in the system expands thereby reducing the braking efficiency which results in brake failure.CONCLUSIONThe study was conducted using an experiment performed on a Thepra Brake Testing Equipment to check the efficiency of the four fluids in the transmission of braking forces. According tothe viscometer test shown that the soap solution appears to be the best fluid as far as low viscosity and stability of viscosity with increase in temperature is concerned. However, it is less compatible with other fluids, difficult to mix easily with other brake fluids and has a low boiling point which will not make it suitable to be substituted as a clean brake fluid.Again, when air is trapped in the braking system, which results in the brake fluid being compressible, higher pedal force was needed to be able to produce a significant braking force.Also, when brakes are operated under hot conditions its efficiency is reduced, a fault known as brake fade occurs as a result of the heating up of the brakes which creates less frictional resistance between rotating disc and the frictional pads.Finally, Soap solution when used at cold condition produces high braking force but becomes less effective after prolong use due to the presence of heat which evaporates the soap solution.REFERENCESAfukaar, F., K. Agyemang, W. Ackaah and I. Mosi, 2008. Road traffic crashes inGhana, statistics 2007. Consultancy Service Report for National Road SafetyCommission of Ghana.Bird, R., S. Wright and E.N. Light, 1960. Transport Phenomena, Gibrine Publishing Company,Heinz, H., 1999. Vehicle and Engine Technology. 2nd Edn.,Butterworth-Heinemann Publications, Nurumberg, pp: 235-291Johnson, D., B. Sperandei and R. Gilbert, 2003. Analysis of the flow through a vented automotive brake rotor. J. Fluids Eng., 125: 979-986.Mcphee, A.D. and D.A. Johnson, 2007. Experimental heat transfer and flow analysis of a vented brake rotor. Int. J. Thermal Sci., 47(4): 458-467.译文：一个使用四个液体系统分析盘式制动器的制动效率的实验摘要当车辆加速时能量由发动机提供使汽车的速度增加。
建筑减震器中英文对照外文翻译文献
中英文对照外文翻译文献(文档含英文原文和中文翻译)Influence of isolator characteristics on the responseof base-isolated structureVasant A. Matsaar 1Z.S. JanidsAbstractThe influence of isolator characteristics on the seismic response of multi-story base-isolated structure is investigated. The isolated building is modeled as a shear type structure with lateral degree-of-freedom at each floor. The isolators are modeled by using two different mathematical models depicted by bi-linear hysteretic and equivalent linear elastic-viscous behaviors. The coupled differential equations of motion for the isolated system are derived and solved in the incremental form using Newmark's step-by-step method of integration. The variation of top floor absolute acceleration and hearing displacement for various bi-linear systems under different earthquakes is computed to study the effects of the shape of the isolator hysteresis loop. The influence of the shape of isolator force-deformation loop on the response of isolated structure is studied under the variation of important system parameters such as isolator yield displacement, superstructure flexibility, isolation time period and number of story of the base-isolated structure. It is observed that the code specified equivalent linear elastic viscous damping model of a bi-linear hysteretic system overestimates the design bearing displacement and underestimates the superstructure acceleration. The response ofbase-isolated structure is significantly influenced by the shape of hysteresis loop of isolator. The low value of yield displace-ment of isolator (i.e. sliding type isolation systems) tends to increase the superstructure accelerations associated with high frequencies. Further, the superstructure acceleration also increases with the increase of the superstructure flexibility.keywords:Base isolation; Earthquake; Elastomtric bearing Sliding system; Bearing displacement; Superstructure acceleration; Bi-linear hysteresis;Equivalent linear.1 IntroductionSeismic isolation, which is now recognized as a mature and efficient technology, can be adopted to improve the seismic performance of strategically important buildings such as schools, hospitals, industrial structures etc., in addition to the places where sensitive equipments are intended to protect from hazardous effects during earthquake [1-3]. Based on the extent of control to be achieved over the seismic response, the choice of the isolation system varies and thereupon its design is done to suit the requirements of use of the structure. In seismically base-isolated systems, the superstructure is decoupled from the earthquake ground motion by introducing a flexible interface between the foundation and the base of structure. Thereby, the isolation system shifts the fundamental time period of the structure to a large value and/or dissipates the energy in damping, limiting the amount of force that can be transferred to the super structure such that inter-story drift and floor accelerations are reduced drastically. The matching of fundamental frequencies of base-isolated structures and the predominant frequency contents of earthquakes is also consequently avoided, leading to a flexible structural system more suitable from earthquake resistance viewpoint. The two most common types of base isolation systems adopted in practice utilize either rubber bearings or sliding systems between the foundation and superstructure for the purpose of isolation from ground motions in the buildings as well as bridges.It is very essential to understand the different parameters affecting the response ofbase-isolated structure when used for seismic protection of the structures. Especially in case of the base-isolated structures, that houses sensitive equipments, determination of acceleration imparted and associated peak displacement are the key issues for the design engineer [4]. Moreover, the pounding and structural impacts in case of baseisolated structures made upon the adjacent structures, when separation gap distances are inadequate, become a major concern because these phenomena may lead tocatastrophic failures leading to immense isolator damage. Such failures and damages can be avoided by properly estimating the peak isolator displacement and recommendation of appropriate isolation gap distances. In order to predict peak displacement and determine accurate separation gap distance requirement for a base-isolated structure, it is mandatory to know, in prior, the different parameters that affect the bearing displacement and its consequent effect on thesuperstructure acceleration. The failures due to such impacts can be avoided by reducing the peak bearing displacement by compromising with increase in superstructure acceleration to an acceptable level i.e. tolerable reduction in effectiveness of isolation. Selection of different parameters characterizing an isolation system is important in view of keeping a control over response quantities especially the excessive bearing displacement at isolator level.The behavior of isolation systems and the baseisolated structures is now well established and codes are developed for designing the base-isolated structures[5–9]. For non-linear isolation systems, the codes allow to use the equivalent linear model to permit the use of response spectrum method for designing the isolated structures. The equivalent linear models are based on the effective stiffness at the design displacement and the equivalent viscous damping is evaluated from the area of the hysteresis loop. The comparison of equivalentlinear and actual non-linear model for the response of isolated bridge structures had been demonstrated in thepast [10–13] and shown that the equivalent linear model can be used for predicting the actual non-linear response of the system. However, the above studies wererestricted to the bridge idealized as a rigid body and the non-linear behavior of the isolator was limited to the lead –rubber bearings idealized by bi-linear characteristics. The equivalent linear model may give different response of isolated structures in comparison to the actual non-linear model for flexible superstructures and the type of non-linear hysteresis loop of the isolator associated with sliding type isolation systems. Therefore, it will be interesting to study the comparison of the two models for different hysteretic behavior of theisolator and the system parameters.Here-in, the seismic response of multi-story structure supported on non-linear base isolation systems is investigated. The specific objectives of the study are:(i) to compare the seismic response of base-isolated flexible building obtained from various bi-linear hysteretic model and its equivalent linear model;(ii) to study the influence of shape of the isolator hysteresis loop and its parameters (i.e. yield displacement and force) on the effectiveness of the isolation system and (iii) to investigate the effects of superstructure flexibility on the response of base-isolated structures.2. Structural model of base-isolated buildingFig. 1(a) shows the idealized mathematical model of the N-story base-isolated building considered for the present study. The base-isolated building is modeled as a shear type structure mounted on isolation systems with one lateral degree-of-freedom at each floor. Following assumptions are made for the structural system under consideration:1. The superstructure is considered to remain within the elastic limit during the earthquake excitation. This is a reasonable assumption as the isolation attempts to reduce the earthquake response in such a way that the structure remains within the elastic range.2. The floors are assumed rigid in its own plane and the mass is supposed to be lumped at each floor level.3. The columns are inextensible and weightless providing the lateral stiffness.4. The system is subjected to single horizontal component of the earthquake ground motion.5. The effects of soil –structure interaction are not taken into consideration.For the system under consideration, the governing equations of motion are obtained by considering the equilibrium of forces at the location of each degrees of-freedom. Theequations of motion for the superstructure under earthquake ground acceleration are expressed in the matrix form aswhere [Ms], [Cs] and [Ks] are the mass, damping and stiffness matrices of the superstructure,respectively;{}{}.12,,.....,T s N s s and x x x x x x ⎧⎫⎧⎫=⎨⎬⎨⎬⎩⎭⎩⎭。
传感器技术论文中英文对照资料外文翻译文献
传感器技术论文中英文对照资料外文翻译文献Development of New Sensor TechnologiesSensors are devices that can convert physical。
chemical。
logical quantities。
etc。
into electrical signals。
The output signals can take different forms。
such as voltage。
current。
frequency。
pulse。
etc。
and can meet the requirements of n n。
processing。
recording。
display。
and control。
They are indispensable components in automatic n systems and automatic control systems。
If computers are compared to brains。
then sensors are like the five senses。
Sensors can correctly sense the measured quantity and convert it into a corresponding output。
playing a decisive role in the quality of the system。
The higher the degree of n。
the higher the requirements for sensors。
In today's n age。
the n industry includes three parts: sensing technology。
n technology。
and computer technology。
智能交通系统中英文对照外文翻译文献
智能交通系统中英文对照外文翻译文献(文档含英文原文和中文翻译)原文:Traffic Assignment Forecast Model Research in ITS IntroductionThe intelligent transportation system (ITS) develops rapidly along with the city sustainable development, the digital city construction and the development of transportation. One of the main functions of the ITS is to improve transportation environment and alleviate the transportation jam, the most effective method to gain the aim is to forecast the traffic volume of the local network and the important nodes exactly with GIS function of path analysis and correlation mathematic methods, and this will lead a better planning of the traffic network. Traffic assignment forecast is an important phase of traffic volume forecast. It will assign the forecasted traffic to every way in the traffic sector. If the traffic volume of certain road is too big, which would bring on traffic jam, planners must consider the adoption of new roads or improving existing roads to alleviate the traffic congestion situation. This study attempts to present an improved traffic assignment forecast model, MPCC, based on analyzing the advantages and disadvantages of classic traffic assignment forecast models, and test the validity of the improved model in practice.1 Analysis of classic models1.1 Shortcut traffic assignmentShortcut traffic assignment is a static traffic assignment method. In this method, the traffic load impact in the vehicles’ travel is not considered, and the traffic impedance (travel time) is a constant. The traffic volume of every origination-destination couple will be assigned to the shortcut between the origination and destination, while the traffic volume of other roads in this sector is null. This assignment method has the advantage of simple calculation; however, uneven distribution of the traffic volume is its obvious shortcoming. Using this assignment method, the assignment traffic volume will be concentrated on the shortcut, which isobviously not realistic. However, shortcut traffic assignment is the basis of all theother traffic assignment methods.1.2 Multi-ways probability assignmentIn reality, travelers always want to choose the shortcut to the destination, whichis called the shortcut factor; however, as the complexity of the traffic network, thepath chosen may not necessarily be the shortcut, which is called the random factor.Although every traveler hopes to follow the shortcut, there are some whose choice isnot the shortcut in fact. The shorter the path is, the greater the probability of beingchosen is; the longer the path is, the smaller the probability of being chosen is.Therefore, the multi-ways probability assignment model is guided by the LOGIT model:∑---=n j ii i F F p 1)exp()exp(θθ (1)Where i p is the probability of the path section i; i F is the travel time of thepath section i; θ is the transport decision parameter, which is calculated by the followprinciple: firstly, calculate the i p with different θ (from 0 to 1), then find the θwhich makes i p the most proximate to the actual i p .The shortcut factor and the random factor is considered in multi-ways probabilityassignment, therefore, the assignment result is more reasonable, but the relationshipbetween traffic impedance and traffic load and road capacity is not considered in thismethod, which leads to the assignment result is imprecise in more crowded trafficnetwork. We attempt to improve the accuracy through integrating the several elements above in one model-MPCC.2 Multi-ways probability and capacity constraint model2.1 Rational path aggregateIn order to make the improved model more reasonable in the application, theconcept of rational path aggregate has been proposed. The rational path aggregate,which is the foundation of MPCC model, constrains the calculation scope. Rationalpath aggregate refers to the aggregate of paths between starts and ends of the trafficsector, defined by inner nodes ascertained by the following rules: the distancebetween the next inner node and the start can not be shorter than the distance betweenthe current one and the start; at the same time, the distance between the next innernode and the end can not be longer than the distance between the current one and theend. The multi-ways probability assignment model will be only used in the rationalpath aggregate to assign the forecast traffic volume, and this will greatly enhance theapplicability of this model.2.2 Model assumption1) Traffic impedance is not a constant. It is decided by the vehicle characteristicand the current traffic situation.2) The traffic impedance which travelers estimate is random and imprecise.3) Every traveler chooses the path from respective rational path aggregate.Based on the assumptions above, we can use the MPCC model to assign thetraffic volume in the sector of origination-destination couples.2.3 Calculation of path traffic impedanceActually, travelers have different understanding to path traffic impedance, butgenerally, the travel cost, which is mainly made up of forecast travel time, travellength and forecast travel outlay, is considered the traffic impedance. Eq. (2) displaysthis relationship. a a a a F L T C γβα++= (2)Where a C is the traffic impedance of the path section a; a T is the forecast traveltime of the path section a; a L is the travel length of the path section a; a F is theforecast travel outlay of the path section a; α, β, γ are the weight value of that threeelements which impact the traffic impedance. For a certain path section, there aredifferent α, β and γ value for different vehicles. We can get the weighted average of α,β and γ of each path section from the statistic percent of each type of vehicle in thepath section.2.4 Chosen probability in MPCCActually, travelers always want to follow the best path (broad sense shortcut), butbecause of the impact of random factor, travelers just can choose the path which is ofthe smallest traffic impedance they estimate by themselves. It is the key point ofMPCC. According to the random utility theory of economics, if traffic impedance is considered as the negativeutility, the chosen probability rs p of origination-destinationpoints couple (r, s) should follow LOGIT model:∑---=n j jrs rs bC bC p 1)exp()exp( (3) where rs p is the chosen probability of the pathsection (r, s);rs C is the traffic impedance of the path sect-ion (r, s); j C is the trafficimpedance of each path section in the forecast traffic sector; b reflects the travelers’cognition to the traffic impedance of paths in the traffic sector, which has reverseratio to its deviation. If b → ∞ , the deviation of understanding extent of trafficimpedance approaches to 0. In this case, all the travelers will follow the path whichis of the smallest traffic impedance, which equals to the assignment results withShortcut Traffic Assignment. Contrarily, if b → 0, travelers ’ understanding error approaches infinity. In this case, the paths travelers choose are scattered. There is anobjection that b is of dimension in Eq.(3). Because the deviation of b should beknown before, it is difficult to determine the value of b. Therefore, Eq.(3) is improvedas follows:∑---=n j OD j OD rsrs C bC C bC p 1)exp()exp(，∑-=n j j OD C n C 11（4） Where OD C is the average of the traffic impedance of all the as-signed paths; bwhich is of no dimension, just has relationship to the rational path aggregate, ratherthan the traffic impedance. According to actual observation, the range of b which is anexperience value is generally between 3.00 to 4.00. For the more crowded cityinternal roads, b is normally between 3.00 and 3.50.2.5 Flow of MPCCMPCC model combines the idea of multi-ways probability assignment anditerative capacity constraint traffic assignment.Firstly, we can get the geometric information of the road network and OD trafficvolume from related data. Then we determine the rational path aggregate with themethod which is explained in Section 2.1.Secondly, we can calculate the traffic impedance of each path section with Eq.(2),Fig.1 Flowchart of MPCC which is expatiated in Section 2.3.Thirdly, on the foundation of the traffic impedance of each path section, we cancalculate the respective forecast traffic volume of every path section with improvedLOGIT model (Eq.(4)) in Section 2.4, which is the key point of MPCC.Fourthly, through the calculation processabove, we can get the chosen probability andforecast traffic volume of each path section, but itis not the end. We must recalculate the trafficimpedance again in the new traffic volumesituation. As is shown in Fig.1, because of theconsideration of the relationship between trafficimpedance and traffic load, the traffic impedanceand forecast assignment traffic volume of everypath will be continually amended. Using therelationship model between average speed andtraffic volume, we can calculate the travel timeand the traffic impedance of certain path sect-ionunder different traffic volume situation. For theroads with different technical levels, therelationship models between average speeds totraffic volume are as follows: 1) Highway: 1082.049.179AN V = (5) 2) Level 1 Roads: 11433.084.155AN V = (6) 3) Level 2 Roads: 66.091.057.112AN V = (7) 4) Level 3 Roads: 3.132.01.99AN V = (8) 5) Level 4 Roads: 0988.05.70A N V =(9) Where V is the average speed of the path section; A N is the traffic volume of thepath section.At the end, we can repeat assigning traffic volume of path sections with themethod in previous step, which is the idea of iterative capacity constraint assignment,until the traffic volume of every path section is stable.译文智能交通交通量分配预测模型介绍随着城市的可持续化发展、数字化城市的建设以及交通运输业的发展，智能交通系统（ITS）的发展越来越快。
内部审计中英文对照外文翻译文献
中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Internal auditing's role in ERMAs organizations lay their enterprise risk groundwork, many auditors are taking on management's oversight responsibilities, new research finds.Internal audit departments have played a variety of roles in their organization's enterprise risk management (ERM) activities since The Committee of Sponsoring Organizations of the Tread way Commission (COSO) released its Enterprise Risk Management-Integrated Framework in September 2004. An IIA position paper issued in the wake of COSO ERM, "The Role of Internal Auditing in Enterprise-wide Risk Management," indicates the roles that the internal audit function should and should not play throughout the ERM process, ranging from full involvement to no involvement. According to the paper, internal auditors should have a core role in five ERM-related assurance activities: giving assurance on risk management processes, giving assurance that risks are evaluated correctly, evaluating risk managementprocesses, evaluating the reporting of key risks, and reviewing the management of key risks.A recent IIA Research Foundation study examined the extent to which internal audit functions adhere to the ERM roles recommended in the IIA paper. During October 2005, researchers disseminated an online survey to 7,200 IIA members through The Institute's Global Auditing Information Network. The survey generated 361 responses from a mix of large, mid-sized, and small organizations in a variety of industries, including businesses, government agencies, and not for profit organizations. Nearly 60 percent of respondents identified themselves as a chief audit executive or audit director, 23 percent were audit managers, and 7.8 percent were staff or senior auditors. Approximately 90 percent were from the United States and Canada.Respondents' organizations are at different stages of implementing ERM, as defined by COSO. More than 11 percent say their organization's ERM infrastructure is mature or relatively mature, and 37 percent have recently adopted or are in the process of implementing ERM. Among all organizations surveyed, the internal audit function is primarily responsible for ERM-related activities in 36 percent of respondents' organizations, while 27 percent say the primary responsibility belongs to a chief risk officer (CRO) who is not part of the audit function. Nearly one-third of respondents say another executive or function oversees ERM..The hours and dollars internal audit functions spend on ERM-related activities are minimal for many respondents. Nearly half say their audit department spent 10 percent or less of its hourly and financial budgets on ERM-related activities during fiscal year 2004. More than one-third of audit departments spent II percent to 50 percent of their time on ERM, and 28 percent spent n percent to 50 percent of their financial budgets, while less than 10 percent of departments Spent more than 50 percent of their time and money.The IIA position paper categorizes 18 ERM-related activities according to the appropriate level of responsibility for the internal audit function. Survey respondents reported their current and ideal level of responsibility for these activities: no responsibility, limited responsibility, moderate responsibility, substantialresponsibility, and total responsibility.CORE ACTIVITIESDifferences between respondents' current and ideal responsibilities are greatest for the five core ERM assurance activities identified In the IIA paper. Respondents Indicated that their current responsibility for each of the core ERM related activities is moderate, but they say they should have a substantial level of responsibility. These views agree with the IIA guidance. Additionally, roughly half of internal audit functions surveyed currently have substantial or full responsibility for at least one core activity, and more than two-thirds say they should have till or substantial responsibility for at least one core activity.Within the core category, the audit function's two highest levels of current responsibility involve reviewing management of key risks and evaluating the risk management process. Evaluating the risk management process and giving assurance on risk management processes are the highest-rated ideal responsibilities. Conversely, giving assurance that risks are evaluated correctly is the lowest-rated current and ideal responsibility.The following respondent comments offer some insight into why audit departments are not currently involved in core ERM-related activities at the level they deem appropriate;"We have just recently begun implementing ERM activities in our company. We do not yet have complete understanding of the process and buy-in from management.""The audit committee and management are not aware of what ERM is.""The internal audit function has just initiated an awareness campaign among the audit committee members."These comments suggest that educating management and the audit committee on ERM issues can be critical to ensuring that the audit function takes on an appropriate level of responsibility for ERM.LEGITIMATE ACTIVITIESThe IIA paper prescribes seven legitimate ERM-related activities for which internal committee audit functions may be responsible as long as safeguards are inplace: facilitating the identification and evaluation of risks, coaching management in responding to risks, coordinating ERM-related activities, consolidating the reporting on risks, maintaining and developing the ERM framework, championing establishment of ERM, and developing risk management strategy for board approval. These activities are described as "consulting" activities. Although respondents' current responsibility for each of these legitimate activities ranges from limited to moderate, they say their ideal level should be moderate, which is consistent with the guidance.Within the legitimate category, the highest level of current internal audit responsibility involves facilitating the identification and evaluation of risks —the top-rated ERM-related activity, including core activities. This activity is also the highest-rated ideal activity among legitimate activities, suggesting that auditors consider it a core responsibility. This finding is not surprising. because risk detection and evaluation are traditional considerations in developing annual audit plans. The lowest-rated current and ideal activity is developing a risk management strategy for board approval, which is an activity that might best be handled by management.The IIA guidance cautions that when internal auditors undertake these legitimate consulting activities, safeguards should be in place to ensure that they do not take on management responsibility for actually managing risks. One possible preventive measure would include documenting the auditors' ERM responsibilities in an audit committee-approved audit charter. Further, if auditors take on any ERM-related activities that fall within this consulting role, they should treat these engagements as consulting engagements and apply the relevant IIA standards to help ensure their independence and objectivity.INAPPROPRIATE ACTIVITIESAccording to the IIA position paper. It is inappropriate for internal auditors to be responsible for six ERM-related activities: setting the risk appetite, imposing risk management processes, providing management assurance on risks, making decisions on risk responses, implementing risk responses on management's behalf, and having accountability for risk management. Overall, audit functions in the survey have greater responsibility for these activities than the IIA paper recommends. However,auditors say they should have some limited responsibility for the inappropriate activities.Within the inappropriate category, internal auditors' highest level of current and ideal responsibility is providing management assurance on risks, while their lowest level of responsibility is for setting the risk appetite. Respondents' comments suggest that auditors currently have greater responsibilities in these areas because the audit function is playing a leading role during the early stages of ERM development.ORGANIZATIONAL CHARACTERISTICSThe perceived current and ideal FRM roles for the internal audit function may vary across organizations, depending on the organization's industry, size, and audit department size, as well as the firm's need to comply with the U.S. Sarbanes-Oxley Act of 2002.INDUSTRY Respondents work in a variety of sectors, including financial services, manufacturing, transportation, communications, utilities, health care, retail and wholesale, government, and education. Researchers compared responses from the two largest industry groups: financial services and manufacturing. On average, financial service industry audit departments have greater current responsibility for core activities than those from manufacturing. With respect to inappropriate activities, manufacturing audit departments tend to say their ideal involvement should be higher than their current responsibility, while financial service industry audit departments rate their current and ideal responsibilities at the same level.ORGANIZATION SIZE Approximately half of respondents work in organizations that had 2004 revenues between US $500 million and US $5 billion. Nearly 25 percent of respondents work in organizations that had revenues under US $500 million in 2004, while a similar number of respondents work in organizations that had more than US $5 billion in revenue that year. Researchers compared responses from organizations with revenues of less than US $1 billion with organizations with revenues greater than US $1 billion. On average, auditors from both types of organizations have relatively equal levels of responsibility for current core activities. However, smaller organizations rated their ideal involvement for thesecore activities higher than large organizations. Smaller organizations have a slightly higher current level of responsibility for inappropriate activities than larger organizations and say their ideal involvement in these areas should be higher.AUDIT STAFF SIZE More than half of respondents work in audit departments with 10 or fewer auditors, slightly more than one-quarter work in departments with between 11 and 50 auditors, and approximately one-tenth of respondents work in departments with more than 50 auditors. Internal audit functions with more than 10 auditors currently have somewhat more responsibility for core activities than audit departments with 10 or fewer auditors. Both large and small audit functions have roughly equal levels of responsibility for all other ERM-related activities. However, unlike large audit organizations, respondents from small audit departments want to have more responsibility for activities in the inappropriate category.SARBANES-OXLEY Most respondents' organizations are required to comply with Sarbanes-Oxley Section 404. Researchers found few differences between those organizations and respondents from organizations that do not have to comply with the act. The primary difference related to core activities, where compliers report a higher level of current responsibility than non-compliers.Although the IIA guidance is equally applicable to all organizations, the research indicates that smaller internal audit departments and those from smaller organizations tend to take on ERM responsibilities that would be more appropriate for management. In these cases, internal auditing should work to develop an ERM implementation and maintenance plan that includes a stratcgy and timeline for migrating responsibilities for these activities to managementTHE AUDITOR'S ROLEAlthough the survey results suggest that the current levels of responsibility audit departments have may differ somewhat from that levels recommended by The IIA'S position paper, the respondents' comments offer some evidence that auditors understand the underlying concepts of the guidance:"There needs to be a shift in the 'doing' of the ERM to being an internal audit function that relies on and evaluates the ERM process. ERM should be in sync withthe audit universe and plan,""In the past i8 months, the corporation has appointed a CRO to provide oversight and guidance to evolving ERM processes. During this period, much of internal auditing's previous ERM roles have migrated to this officer." More importantly, respondents identified significant barriers in their organizations to following the guidance:"These ERM responsibilities and processes are not well defined in many organizations and should be more clearly articulated by senior management."'There is not enough emphasis from the top that risk management is important and must be done effectively. Management is still trying to hide things from internal auditing. It's not them against us, we're all in it together.""Most auditors and enterprise managers lack clarity on the distinction between responsibility for risk assurance implementation versus responsibility for risk assurance compliance and monitoring."These comments stress that a key element to establishing a successful ERM program is education on the importance of ERM and the appropriate roles management and internal auditing have in the process. Internal auditors can play a key role in providing this education. The audit department, management, hoard of directors, and audit committee need to be clear about which ERM related activities internal auditors should perform and which activities should always be performed by management. Relevant training should highlight that internal auditing could serve in a monitoring or consulting role throughout much of the ERM process, but the formal decision-making authority must reside with management if the audit department is to maintain its independence and objectivity.Auditors should take steps to ensure that the board and audit committee are aware of the COSO ERM framework and are actively engaged in overseeing the ERM process. Additionally, auditors should consider training senior management, the board, and others throughout their organization on COSO ERM and related guidance.Responses to the survey provide useful insights into additional steps that the internal audit profession should take. Auditors whose organizations are in the earlystages of adopting ERM or will be implementing ERM in the future have many opportunities to ensure that the process is effective and efficient. For example, audit departments that currendy perform ERM-related activities that should be management's responsibility can take proactive steps to open up the lines of communication between internal auditing and management, the board and audit committee, and external auditors about the risks of this situation. Such communication should encourage management to take on appropriate ERM responsibilities. One approach audit departments could take is to develop a business plan describing how management can assume responsibility for ERM related activities for which they should be accountable. However, internal auditors should recognize that completing this plan and convincing management to accept these ERM responsibilities might not occur quickly.With appropriate planning, communication, and education, internal auditors, management, the board, and external auditors should be ready to work together to achieve the many benefits of ERM. Ideally, this coordination will result in performing ERM-related activities at appropriate places within the organization, management accepting its responsibility for ERM, and that audit function playing a role that is consistent with appropriate professional guidance.译文：内部审计在企业风险管理中的作用新的研究发现：随着企业以组织风险为基础，许多审计人员对管理层采取职责监督措施。
给水排水中英文对照外文翻译文献
中英文对照外文翻译文献(文档含英文原文和中文翻译)原文：Optimum combination of water drainage,water supply and eco-environment protection in coal-accumulated basin of North ChinaAbstract The conflict among water drainage,water supply and eco-environment protection is getting more and more serious due to the irrational drainage and exploitation of ground water resources in coal-accumulated basins of North China.Efficient solutions to the conflict are tomaintain long-term dynamic balance between input and output of theground water basins,and to try to improve resourcification of the mine water.All solutions must guarantee the eco-environment quality.This paper presents a new idea of optimum combination of water drainage，water supply and eco-environment protection so as to solve theproblem of unstable mine water supply,which is caused by the changeable water drainage for the whole combination system.Both the management of hydraulic techniques and constraints in economy,society,ecology,environment,insustuial structural adjustments and sustainable developments have been taken into account.Since the traditional and separate management of different departments of water drainage,water supply and eco-environment protection is broken up these departments work together to avoid repeated geological survey and specific evaluation calculations so that large amount of national investment can be saved and precise calculation for the whole system can be obtained.In the light of the conflict of water drainage,water supply and eco-environment protection in a typical sector in Jiaozuo coal mine,a case study puts forward an optimum combination scheme,in which a maximum economic benefit objective is constrained by multiple factors.The scheme provides a very important scientific base for finding a sustainable development strategy.Keywords combination system of water drainage,water supply and eco-environment protection,optimal combination,resourcification of mine water.1Analyses of necessity for the combinationThere are three related problems in the basin.It is well known that the major mine-hydrogeological characteristics of the coal accumulated basin in North China display a stereo water-filling structure,which is formed by multi-layer aquifers connected hydraulically together with various kinds of inner or outer boundaries.Mine water hazards have seriously restricted the healthy development of coal industry in China because of more water-filling sources and stronger water-filling capacity in coal mines of the basin.Coal reserves in the basin are threatened by the water hazards.In Fengfeng,Xingtai,Jiaozuo,Zibao,Huaibei and Huainan coal mine districts,for example,it is estimatedthat coal reserves are threatened by the water hazards up to 52％,71.％40,％,60％,48％and 90％of total prospecting reserves respectively.It is obvious that un-mining phenomenon caused by the water hazards is serious.Water-bursting accidents under coal layers have seriously influenced safe production.Some statistical data show that there were 17 water-bursting accidents with over 1 m3/s inflow from 1985.Water drainage is an increasing burden on coal mines threatened by water hazards:high cost of water drainage raises coal prices and reduces profits of the enterprise.On the other hand,it is more and more difficult to meet the demand of water supply in coal mine districts in the basin.The reasons are not only arid and semi-arid weather conditions,but also a large amount of water drainage with deep drawdown in coal mines and irrational water exploitation.The deterioration of eco-environment is another problem.Phenomena of land surface karst collapse can be found.Many famous karst springs,which are discharge points for the whole karst groundwater syatem,stop flowing or their discharge rates decrease on a large scale.Desert cremophytes in large areas in west China die because of falling groundwater level.These three problems are related and contradictory.In order to solve the problems while ensuring safe mining,meeting water resource demands and slowing down the pace of eco-environment deterioration,it is necessary to study the optimum combination of water drainage,water supply and eco-environment protection in the basin.2The state of the art of research and the problemsAlthough research into the combination of water drainage and water supply started much earlier in some countries,their conception is simple and some shortcomings remain in their study on the theory and pattern of combination.China’s research history on the combination can be divided into three stages.The first stage is the utilization of mine water.A century ago mine water started to be used as water supply for mines.But the utilization scale and efficiency were quite limited at that time.The second stage is a comprehensive one:mine water was used while water hazards were harnessed.Great progress was made both in theory and practice of the combination.For example,the combination of water drainage and water supply not only means the utilization of mine water,but also means that it is a technique of preventing water hazards.It is unfortunate,however,that the combination research in this stage offered less sense ofeco-environment protection.Optimum combination management of water drainage,water supply and eco-environment protection is the third stage.Main features in this stage are to widen traditional research,and to establish an economic-hydraulic management model,in which safe mining,eco-environment protection and sustainable development demands,etc.are simultaneously considered as constraint conditions.3Trinity systemThe trinity system combines water drainage,water supply and eco-environment quality protection.The water-collecting structures of the system consist of land surface pumping wells in the mines,shallow land surface well in groundwater recharge areas and artificial relief wells under the mines.Both integration and coordination for the trinity system are distinguished according to the combination.The integration for the system means to utilize drainage water under the mines and pump water onto the land surface as water supply for different purposes without harming the eco-environmental quality.The coal mines are not only drainage sites,but also water supply sources.The purpose of drilling pumping wells on the land surface is to eliminate special influences on different consumers,which are caused by terminating drainage processes under the mines due to unexpected accidents in mining.The coordination for the system means to bulid some water supply sources for different consumers while ensuring eco-environmental quality in groundwater recharge positions,where pumping groundwater is quite effective on lowering groundwater heads in the mine areas.Itintercepts in advance the recharging groundwater flow towards the mines,which may not only provide consumers with good quality groundwater,achieve the goal of dropping down groundwater heads in the mines,but also effectively reduce the high costs of drainage and water treatment,which are needed by traditional dewatering measures with large drainage flow rates under the mines.The coordination changes the traditional passive pattern of preventing and controlling groundwater hazards under the mines into that of active surface interception.Both very developed karst flow belts and accumulated groundwater recharge ones under the ground are relatively ideal interceptive coordination positions in the system.For the integration of the trinity system,artificial relief wells under the mines and the land surface pumping wells mainly penetrate into direct thin bedded karst aquifers interbedded with the mining coal layers,while for the coordination of the system,the shallow land surface wells mainly penetrate into very thick karst aquifer.Therefore,hydrogeological conceptual model for the system involves the multi-layer aquifers connected hydraulically by different inner boundaries.Setting up stereo hydrogeological conceptual models and corresponding mathematical models is a prerequisite for solving the managemental problems for the system.Management of the trinity system not only considers the effects of lowering groundwater heads and safe operation for water drainage subsystem,but also pays attention to the water demands for water supply subsystem and quality changes for eco-environment protection subsystem.They play the same important role in the whole combination system.It controls the groundwater heads in each aquifer to satisfy the conditions of safe mining with certain water head pressures in the mines,and to guarantee a certain amount of water supply for the mines and near areas,but the maximum drawdown of groundwater must not be ex ceded,which may result in lowering eco-environmental quality.4Economic-hydraulic management modelIn the trinity system management,groundwater resources in the mines and nearby areas,which are assessed on the premise of eco-environment qualities and safe operation in the mines,may be provided as water supply prices,drainage costs,transportation costs(including pipeline and purchasing the land costs)and groundwater quality treatment costs for the three different waterconsumers,the optimum management models may automatically allocate to each consumer a certain amount of groundwater resources and a concrete water supply scenario based on comparisons of each consumer’s economic contribution to the whole system in objective function.Therefore the management studies on the optimal combination among water drainage,water supply and eco-environment protection involve both the management of groundwater hydraulic techniques and the economic evaluations,eco-environment quality protection and industrial structure programs.In addition to realizing an economic operation,they also guarantee a safe operation which is a key point for the combination of the whole system.5The management model for the trinity system can reach water supply goals with drainage water under the mines and the land surface pumping water on the premise of ensuring eco-environmental quality.And it can make use of one model to lay down comprehensively optimum management scenarios for each subsystem by means of selecting proper constraints and maximum economic benefit objective produced by multiple water consumers.The model can raise the security and reliability of operation for the whole trinity system,and the drainage water can be forecast for the mines and the management of water supply resource and the evaluation of eco-environment quality can be performed at the same time so as to respectively stop the separate or closed management,of departments of drainage water,water supply and eco-environment protection from geological survey stage to management evaluation.This,in economic aspect,can not only avoid much geological survery and special assessment work which are often repeated by the three departments,and save a lot of funds,but also ,in technical aspect,make use of one model to simultaneously consider interference and influence on each other for different groundwater seepage fields so as to guarantee calculating precision of the forecast,the management and the evaluation work.The economic-hydraulic management model can be expressed as follows.6 A case studyA typical sector is chosen.It is located in the east of Jiaozuo coal mine,Henan Province,China.Itconsists of three mines:Hanwang Mine,Yanmazhuang Mine and Jiulishan Mine.The land surface is flat,and the whole area is about 30 km2.An intermittent river Shanmen flows through the sector from the north to the south.Average annual precipitation in the sector is about 662.3mm.Theprecipitation mainly concentrates inJune,July,August and September each year.Strata in the sector consist of very thick limestone in Middle Ordovician,coal-bearing rock series in Permo Carboniferous and loose deposits in Quaternary.There are four groups of faulted structures.The first is in northeast-southwest direction such as F3 and F1..The second is in the northwest-southeast direction such as Fangzhuang fault.The third is in the east-west direction such as Fenghuangling fault.The last is almost in north-south.These faults are all found to be normal faults with a high degree of dip angle.Four major aquifers have been found in the sector.The top one is a semi-confined porous aquifer.The next one is a very thin bedded limeston aquifer.The third is a thin bedded limestone aquifer.The last one at the bottom is a very thick limestone aquifer.Objective function of the management model is designed to be maximum economic benefit produced by domestic,industrial and agricultural water supply.Policy making variables of the model are considered as the domestic,industrial and agricultural groundwater supply rates in every management time step,and they are supplied by artificial relief flow wells under the mines,the land surface pumping wells in the mines and the shallow land surface wells in the groundwater recharge areas.All the 135 policy making variables are chosen in the model,27 for drainage wells under the mines in aquifer,27 for the land surface pumping wells in the mine districts in aquifer 27 in aquifer 27 in aquifer O2 27 for the shallow land surface wells in aquifer O2Based on the problems,the following constraint conditions should be considered:(1)Safe mining constraint with groundwater pressure in aquifer L8.There are altogether three coalmines in the typical sector,i.e.Hanwang Mine,Yanmazhuang Mine and Jiulishan Mine.Elevations of mining level for these mines are different because it is about 88-150 m in the second mining level for Hanwang Mine,and -200m in the second mining level for Yanmazhuang Mine,and-225 m in the first mining level for Jiulishan Mine.According to mining experiences,pressure-loaded heights for groundwater heads in safe mining state are considered as about 100-130m.Therefore,the groundwater level drawdowns in the three management time steps for aquifer L8 at three mines have to be equivalent to safe drawdown values at least in order to pervert groundwater hazards under the mines and to guarantee their safe operation.(2)Geological eco-environment quality constraint.In order to prevernt groundwater leakage fromupper contaminater porous aquifer into bottom one and then to seepage further down to contaminate the thin bedded limestone aquifer in the position of buried outcrop,the groundwater heads in the bottom porous aquifer must keep a certain height,i.e.the groundwater drawdowns in it are not allowed to exceed maximum values.(3)Groundwater head constraint at the shallow land surface wells in aquifer O2,The shallow landsurface wells should penetrate in aquifer O2 in order to avoid geological environment hazards,such as karst collapse and deep karst groundwater contamination.Groundwater head drawdowns in aquifer O2 for the shallow land surface wells are not allowed to exceed criticalvalues.(4)Industrial water supply constraint for the groundwater source in aquifer O2 .The rate ofindustrial water supply needed by the planned thermal power plant in the north of the sectoris designed to be 1.5 m3/s according to the comprehensive design of the system in thesector.In order to meet the demands of water,the rate industrial water supply for thegroundwater source in aquifer O2 in every management time step must be equivalent at leastto 1.5 m3/s.(5)Maximum amount constraint of groundwater resource available for abstraction.In order tomaintain the balance of the groundwater system in the sector for a long time and to avoid anyharmful results caused by continuous falling of groundwater head,the sum of groundwaterabstraction in each management time step is not allowed to exceed the maximum amount ofgroundwater resource available for abstraction.Since there is not only water drainage in the mines,but also water supply in the whole combination system,management period for the model is selected from June 1,1978 to May 31,1979,in which annual average rate of precipitation is about 50％.Management time steps for the period are divided into three.The first one is from June to September,the second from October to next January,and the last one from next February to May.According to comprehensive information about actual economic ability,economic development program and industrial structure adjustment in the sector at present and in the near future,and different association forms of water collecting structures among the land surface pumping wells,the shallow land surface wells and artificial relief flow wells under the mines,this paper designs 12 management scenarious,all of which take the safe operation in the trinity system as the most important condition.After making comparisons of optimum calculation results for the 12 scenarious,this paper comes to a conclusion that scenarios is the most ideal and applicable one for the typical sector.This scenario not only considers the effective dewatering advantage of the artificial relief flow wells under the mines and safe stable water supply advantage of the land surface pumping wells,but also pays attention to the disadvantage of low safe guaranty rate for the relief flow wells under the mines for water supply and of large drilling investment in the land surface pumping wells.Meanwhile,eh shallow land surface wells inaquifer O2in this scenario would not only provide water supply for the thermal power plant as planned,but also play an important role in dewatering the bottom aquifer,which is major recharge source of groundwater for the mines.If the drainage subsystem under the mines runs normally,this scenario could fully offer the effective dewatering functions of the artificial relief flow wells under the mines,and makes the trinity system operate normally.But if the drainage subsystem has to stop suddenly because of unexpected accidents,the scenario could still fully utilize the land surface pumping wells and the shallow land surface wells,and increae their pumping rates in order to make up for temporary shortage of water supply for the trinity system and to make its economic losses reduced to a minimum extent.Increasing groundwater abstraction rate for the land surface pumping wells and the shallow land surface wells,in fact,is very favorable for harnessing the water-accidents under the mines and for recovery production of the mines.To sum up,this scenario sets up a new pattern for the combination of water drainage,water supply and eco-environment protection.It solves quite well the conflicts between the low safe guaranty rate and the effective dewatering result for the artificial relief flow wells under the mines.It makes full use of beneficial aspect of the conflicts,and meanwhile compensates for the unbeneficial one by arranging the land surface pumping wells in the coal mine districts.Therefore,this scenario should be comprehensive and feasible.In this scenario,Hanwan Mine,Yanmazhuang Mine and Jiulishan Mine are distributed optimally for certain amount of domestic and industrial water supply,but not for much agricultural water supply.The land surface pumping wells are also distributed for different purposes of water supply.The water supply for the thermal power plant (1.5 m3/s) is provided by the shallow land surface prehensive effects,produced by the above three kinds of water collecting structures,completely satisfy all of the constraint conditions in the management model,and achieve an extremely good economic objective of 16.520551million RMB yuan per year.In order to examine the uncertainty of the management model,12management scenarios are all tested with sensitive analysis.7Conclusion(1)The optimum combination research among water drainage,water supply and eco-environmentprotection is of great theoretical significance and application value in the basin of North China for solving unbalanced relation between water supply and demands,developing new potential water supply sources and protecting weak eco-environment.(2)The combination research is concerned not only with hydraulic technique management but alsowith constraints of economic benefits,society,ecology,environment quality,safe mining and sustainable development in the coal mines.(3)The combination model,for the first time,breaks up the closed situation existing for a longtime,under which the government departments of drainage water,water supply and eco-environment protection from geological survey stage to management evaluation work respectively.Economically,it can spare the repeated geological survey and special assessment work done by the three departments and save a lot of funds;technically,one model is made use of to cover the interference and influence each other for different groundwater seepage fields soas to guarantee a high calculating precision of the forecast,the management and the evaluation work.(4)The management scenario presented in the case study is the most ideal and applicable for thetypical sector.This scenario not only makes full use of the effective dewatering advantages of the artificial relief flow wells under the mines and safe stable water supply advantages of the land surface pumping wells,but also pays attention to the disadvantages of low safe guaranty rate for the relief flow wells under the mines for water supply and of large drilling investment for the land surface pumping wells.References1.Investigation team on mine-hydrogeology and engineering geology in the Ministry ofGeology and Mineral Resources.Investigation Report on Karst-water-filling Mines(inChinese).Beijing:Geological Publishing House,19962.Liu Qiren,Lin Pengqi,Y u Pei,Investigation comments on mine-hydrogeological conditionsfor national karst-water-filling mines,Journal of Hydrogeology and Engineering Geology(in Chinese),19793.Wang Mengyu,Technology development on preventing and curing mine water in coalmines in foreign countries,Science and Technology in Coal(in Chinese),19834.Coldewey,W.G.Semrau.L.Mine water in the Ruhr Area(Federal Republic of Germany),inProceedings of 5th International Mine Water Congress,Leicestershire:Quorn SelectiveRepro Limited,19945.Sivakumar,M.Morten,S,Singh,RN,Case history analysis of mine water pollution,inProceedings of 5th International Mine Water Congress,Leicestershire;Quorn SelectiveRepro Limited,19946.Ye Guijun.Zhang Dao,Features of Karst-water-filling mines and combination betweenwater drainage and water supply in China,Journal of Hydrogeology and EngineeringGeology(in China),19887.Tan Jiwen,Shao Aijun,Prospect analyses on Combination between water drainage andwater supply in karst water basin in northern China,Jounnal of Hebei College ofGeology(in Chinese),19858.Xin Kuide,Yu Pei,Combination between water drainage and water for seriouskarst-water-filling mines in northern China,Journal of Hydrogeology and Engineering Geology(in Chinese),19869.Wu Qiang,Luo Yuanhua,Sun Weijiang et al.Resourcification of mine water andenvironment protection,Geological Comments(in Chinese),199710.Gao Honglian,Lin Zhengping,Regional characteristics of mine-hydrogeological conditionsof coal deposits in China,Journal of Hydrogeology and Engineering Geology(in Chinese),198511.Jiang Ben,A tentative plan for preventing and curing measures on mine water in coal minesin northern China,Geology and Prospecting for Coaofield(in Chinese),1993中国北方煤炭积聚区的最佳组合排水，供水和生态环境保护摘要为了开采中国北方煤炭资源丰富的区域，不合理的排水使排水、供水和保护生态环境之间的冲突日趋严重。
交通安全外文翻译文献中英文
外文文献翻译(含：英文原文及中文译文)英文原文POSSIBILITIES AND LIMITA TIONS OF ACCIDENT ANALYSISS.OppeAbstraetAccident statistics, especially collected at a national level are particularly useful for the description, monitoring and prognosis of accident developments, the detection of positive and negative safety developments, the definition of safety targets and the (product) evaluation of long term and large scale safety measures. The application of accident analysis is strongly limited for problem analysis, prospective and retrospective safety analysis on newly developed traffic systems or safety measures, as well as for (process) evaluation of special short term and small scale safety measures. There is an urgent need for the analysis of accidents in real time, in combination with background behavioural research. Automatic incident detection, combined with video recording of accidents may soon result in financially acceptable research. This type of research may eventually lead to a better understanding of the concept of risk in traffic and to well-established theories.Keyword: Consequences; purposes; describe; Limitations; concerned; Accident Analysis; possibilities1. Introduction.This paper is primarily based on personal experience concerning traffic safety, safety research and the role of accidents analysis in this research. These experiences resulted in rather philosophical opinions as well as more practical viewpoints on research methodology and statistical analysis. A number of these findings are published already elsewhere.From this lack of direct observation of accidents, a number of methodological problems arise, leading to continuous discussions about the interpretation of findings that cannot be tested directly. For a fruitful discussion of these methodological problems it is very informative to look at a real accident on video. It then turns out that most of the relevant information used to explain the accident will be missing in the accident record. In-depth studies also cannot recollect all the data that is necessary in order to test hypotheses about the occurrence of the accident. For a particular car-car accident, that was recorded on video at an urban intersection in the Netherlands, between a car coming from a minor road, colliding with a car on the major road, the following questions could be asked: Why did the driver of the car coming from the minor road, suddenly accelerate after coming almost to a stop and hit the side of the car from the left at the main road? Why was the approaching car not noticed? Was it because the driver was preoccupied with the two cars coming from the right and the gap before them that offered him thepossibility to cross? Did he look left before, but was his view possibly blocked by the green van parked at the corner? Certainly the traffic situation was not complicated. At the moment of the accident there were no bicyclists or pedestrians present to distract his attention at the regularly overcrowded intersection. The parked green van disappeared within five minutes, the two other cars that may have been important left without a trace. It is hardly possible to observe traffic behavior under the most relevant condition of an accident occurring, because accidents are very rare events, given the large number of trips. Given the new video equipment and the recent developments in automatic incident and accident detection, it becomes more and more realistic to collect such data at not too high costs. Additional to this type of data that is most essential for a good understanding of the risk increasing factors in traffic, it also important to look at normal traffic behavior as a reference base. The question about the possibilities and limitations of accident analysis is not lightly answered. We cannot speak unambiguously about accident analysis. Accident analysis covers a whole range of activities, each originating from a different background and based on different sources of information: national data banks, additional information from other sources, especially collected accident data, behavioral background data etc. To answer the question about the possibilities and limitations, we first have to look at the cycle of activities in the area of traffic safety. Some ofthese activities are mainly concerned with the safety management of the traffic system; some others are primarily research activities.The following steps should be distinguished:- detection of new or remaining safety problems;- description of the problem and its main characteristics;- the analysis of the problem, its causes and suggestions for improvement;- selection and implementation of safety measures;- evaluation of measures taken.Although this cycle can be carried out by the same person or group of persons, the problem has a different (political/managerial or scientific) background at each stage. We will describe the phases in which accident analysis is used. It is important to make this distinction. Many fruitless discussions about the method of analysis result from ignoring this distinction. Politicians, or road managers are not primarily interested in individual accidents. From their perspective accidents are often treated equally, because the total outcome is much more important than the whole chain of events leading to each individual accident. Therefore, each accident counts as one and they add up all together to a final safety result.Researchers are much more interested in the chain of events leading to an individual accident. They want to get detailed information abouteach accident, to detect its causes and the relevant conditions. The politician wants only those details that direct his actions. At the highest level this is the decrease in the total number of accidents. The main source of information is the national database and its statistical treatment. For him, accident analysis is looking at (subgroups of) accident numbers and their statistical fluctuations. This is the main stream of accident analysis as applied in the area of traffic safety. Therefore, we will first describe these aspects of accidents.2. The nature of accidents and their statistical characteristics.The basic notion is that accidents, whatever there cause, appear according to a chance process. Two simple assumptions are usually made to describe this process for (traffic) accidents:- the probability of an accident to occur is independent from the occurrence of previous accidents;-the occurrence of accidents is homogeneous in time.If these two assumptions hold, then accidents are Poisson distributed. The first assumption does not meet much criticism. Accidents are rare events and therefore not easily influenced by previous accidents. In some cases where there is a direct causal chain (e.g. , when a number of cars run into each other) the series of accidents may be regarded as one complicated accident with many cars involved.The assumption does not apply to casualties. Casualties are often related to the same accident andtherefore the independency assumption does not hold. The second assumption seems less obvious at first sight. The occurrence of accidents through time or on different locations are not equally likely. However, the assumption need not hold over long time periods. It is a rather theoretical assumption in its nature. If it holds for short periods of time, then it also holds for long periods, because the sum of Poisson distributed variables, even if their Poisson rates are different, is also Poisson distributed. The Poisson rate for the sum of these periods is then equal to the sum of the Poisson rates for these parts.The assumption that really counts for a comparison of (composite) situations, is whether two outcomes from an aggregation of situations in time and/or space, have a comparable mix of basic situations. E.g. , the comparison of the number of accidents on one particular day of the year, as compared to another day (the next day, or the same day of the next week etc.). If the conditions are assumed to be the same (same duration, same mix of traffic and situations, same weather conditions etc.) then the resulting numbers of accidents are the outcomes of the same Poisson process. This assumption can be tested by estimating the rate parameter on the basis of the two observed values (the estimate being the average of the two values). Probability theory can be used to compute the likelihood of the equality assumption, given the two observations and their mean.This statistical procedure is rather powerful. The Poisson assumptionis investigated many times and turns out to be supported by a vast body of empirical evidence. It has been applied in numerous situations to find out whether differences in observed numbers of accidents suggest real differences in safety. The main purpose of this procedure is to detect differences in safety. This may be a difference over time, or between different places or between different conditions. Such differences may guide the process of improvement. Because the main concern is to reduce the number of accidents, such an analysis may lead to the most promising areas for treatment. A necessary condition for the application of such a test is, that the numbers of accidents to be compared are large enough to show existing differences. In many local cases an application is not possible. Accident black-spot analysis is often hindered by this limitation, e.g., if such a test is applied to find out whether the number of accidents at a particular location is higher than average. The procedure described can also be used if the accidents are classified according to a number of characteristics to find promising safety targets. Not only with aggregation, but also with disaggregation the Poisson assumption holds, and the accident numbers can be tested against each other on the basis of the Poisson assumptions. Such a test is rather cumbersome, because for each particular case, i.e. for each different Poisson parameter, the probabilities for all possible outcomes must be computed to apply the test. In practice, this is not necessary when the numbers are large. Then the Poissondistribution can be approximated by a Normal distribution, with mean and variance equal to the Poisson parameter. Once the mean value and the variance of a Normal distribution are given, all tests can be rephrased in terms of the standard Normal distribution with zero mean and variance one. No computations are necessary any more, but test statistics can be drawn from tables.3. The use of accident statistics for traffic safety policy.The testing procedure described has its merits for those types of analysis that are based on the assumptions mentioned. The best example of such an application is the monitoring of safety for a country or region over a year, using the total number of accidents (eventually of a particular type, such as fatal accidents), in order to compare this number with the outcome of the year before. If sequences of accidents are given over several years, then trends in the developments can be detected and accident numbers predicted for following years. Once such a trend is established, then the value for the next year or years can be predicted, together with its error bounds. Deviations from a given trend can also be tested afterwards, and new actions planned. The most famous one is carried out by Smeed 1949. We will discuss this type of accident analysis in more detail later.(1). The application of the Chi-square test for interaction is generalised to higher order classifications. Foldvary and Lane (1974), inmeasuring the effect of compulsory wearing of seat belts, were among the first who applied the partitioning of the total Chi-square in values for the higher order interactions of four-way tables.(2). Tests are not restricted to overall effects, but Chi-square values can be decomposed regarding sub-hypotheses within the model. Also in the two-way table, the total Chisquare can be decomposed into interaction effects of part tables. The advantage of 1. and 2. over previous situations is, that large numbers of Chi-square tests on many interrelated (sub)tables and corresponding Chi-squares were replaced by one analysis with an exact portioning of one Chi-square.(3). More attention is put to parameter estimation. E.g., the partitioning of the Chi-square made it possible to test for linear or quadratic restraints on the row-parameters or for discontinuities in trends.(4). The unit of analysis is generalised from counts to weighted counts. This is especially advantageous for road safety analyses, where corrections for period of time, number of road users, number of locations or number of vehicle kilometres is often necessary. The last option is not found in many statistical packages. Andersen 1977 gives an example for road safety analysis in a two-way table. A computer programme WPM, developed for this type of analysis of multi-way tables, is available at SWOV (see: De Leeuw and Oppe 1976). The accident analysis at this level is not explanatory. It tries to detect safety problems that need specialattention. The basic information needed consists of accident numbers, to describe the total amount of unsafety, and exposure data to calculate risks and to find situations or (groups of) road users with a high level of risk. 4. Accident analysis for research purposes.Traffic safety research is concerned with the occurrence of accidents and their consequences. Therefore, one might say that the object of research is the accident. The researcher’s interest however is less focused at this final outcome itself, but much more at the process that results (or does not result) in accidents. Therefore, it is better to regard the critical event in traffic as his object of study. One of the major problems in the study of the traffic process that results in accidents is, that the actual occurrence is hardly ever observed by the researcher.Investigating a traffic accident, he will try to reconstruct the event from indirect sources such as the information given by the road users involved, or by eye-witnesses, about the circumstances, the characteristics of the vehicles, the road and the drivers. As such this is not unique in science, there are more examples of an indirect study of the object of research. However, a second difficulty is, that the object of research cannot be evoked. Systematic research by means of controlled experiments is only possible for aspects of the problem, not for the problem itself. The combination of indirect observation and lack of systematic control make it very difficult for the investigator to detectwhich factors, under what circumstances cause an accident. Although the researcher is primarily interested in the process leading to accidents, he has almost exclusively information about the consequences, the product of it, the accident. Furthermore, the context of accidents is complicated. Generally speaking, the following aspects can be distinguished: - Given the state of the traffic system, traffic volume and composition, the manoeuvres of the road users, their speeds, the weather conditions, the condition of the road, the vehicles, the road users and their interactions, accidents can or cannot be prevented.- Given an accident, also depending on a large number of factors, such as the speed and mass of vehicles, the collision angle, the protection of road users and their vulnerability, the location of impact etc., injuries are more or less severe or the material damage is more or less substantial. Although these aspects cannot be studied independently, from a theoretical point of view it has advantages to distinguish the number of situations in traffic that are potentially dangerous, from the probability of having an accident given such a potentially dangerous situation and also from the resulting outcome, given a particular accident.This conceptual framework is the general basis for the formulation of risk regarding the decisions of individual road users as well as the decisions of controllers at higher levels. In the mathematical formulation of risk we need an explicit description of our probability space, consistingof the elementary events (the situations) that may result in accidents, the probability for each type of event to end up in an accident, and finally the particular outcome, the loss, given that type of accident.A different approach is to look at combinations of accident characteristics, to find critical factors. This type of analysis may be carried out at the total group of accidents or at subgroups. The accident itself may be the unit of research, but also a road, a road location, a road design (e.g. a roundabout) etc.中文译文交通事故分析的可能性和局限性S.Oppe摘要交通事故的统计数字, 尤其国家一级的数据对监控和预测事故的发展, 积极或消极检测事故的发展, 以及对定义安全目标和评估工业安全特别有益。
物联网中英文对照外文翻译文献
中英文资料外文翻译Internet of Things1.the definition of connotationThe English name of the Internet of Things The Internet of Things, referred to as: the IOT.Internet of Things through the pass, radio frequency identification technology, global positioning system technology, real-time acquisition of any monitoring, connectivity, interactive objects or processes, collecting their sound, light, heat, electricity, mechanics, chemistry, biology, the location of a variety of the information you need network access through a variety of possible things and things, objects and people in the Pan-link intelligent perception of items and processes, identification and management. The Internet of Things IntelliSense recognition technology and pervasive computing, ubiquitous network integration application, known as the third wave of the world's information industry development following the computer, the Internet. Not so much the Internet of Things is a network, as Internet of Things services and applications, Internet of Things is also seen as Internet application development. Therefore, the application of innovation is the core of the development of Internet of Things, and 2.0 of the user experience as the core innovation is the soul of Things.2.The meaning of "material"Where the "objects" to meet the following conditions can be included in the scope of the "Internet of Things":1. Receiver have the appropriate information;2. Have a data transmission path;3. Have a certain storage capabilities;4. To have the CPU;5．To have the operating system;6. Have specialized applications;7. Have a data transmitter;8. Follow the communication protocol of Things;9. World Network, a unique number that can be identified.3. "Chinese style" as defined inInternet of Things (Internet of Things) refers to is the ubiquitous (Ubiquitous) terminal equipment (Devices) and facilities (Facilities), including with the "inner intelligence" sensors, mobile terminals, industrial systems, floor control system, the family of Intelligentfacilities, video surveillance systems, and external can "(Enabled), such as RFID, a variety of assets (the Assets), personal and vehicle carrying the wireless terminal" intelligent objects or animals "or" smart dust "(the Mote), through a variety of wireless and / or cable over long distances and / or short-range communication networks to achieve interoperability (M2M), application integration (the Grand Integration), and based on cloud computing, SaaS operation mode, in internal network (intranet), private network (extranet), and / or the Internet (Internet) environment, the use of appropriate information security mechanisms to provide a safe, controlled and even personalized real-time online monitoring, retrospective positioning, alarm linkage, command and control plan management, remote control, security, remote repair and maintenance, online upgrades, statistical reporting, decision support, the leadership of the desktop (showcase of the Cockpit Dashboard) management and service functions, "Everything," "efficient, energy saving, security environmental protection, "" possession, control, Camp integration [1].4.EU definitionIn September 2009, the Internet of Things and enterprise environments held in Beijing, China-EU Seminar on the European Commission and Social Media Division RFID Division is responsible for Dr. Lorent Ferderix, given the EU's definition of things: the Internet of Things is a dynamic global network infrastructure, it has a standards-based and interoperable communication protocols, self-organizing capabilities, including physical and virtual "objects" of identity, physical attributes, virtual features and smart interface and seamless integration of information networks .Internet of Things Internet and media, the Internet and business Internet one, constitute the future of the Internet.5．changeThe Internet of Things (Internet of Things) the word universally recognized at home and abroad Ashton, Professor of the MIT Auto-ID Center in 1999 first proposed to study RFID. The report of the same name released in 2005, the International Telecommunication Union (ITU), the definition and scope of the Internet of Things has been a change in the coverage of a larger expansion, no longer refers only to the Internet of Things based on RFID technology.Since August 2009, Premier Wen Jiabao put forward the "Experience China" Internet of Things was officially listed as a national one of the five emerging strategic industries, to write the "Government Work Report" Internet of Things in China has been the great concern of the society as a whole degree of concern is unparalleled in the United States, European Union, as well as other countries.The concept of Internet of Things is not so much a foreign concept, as it has been the concept of a "Made in China", his coverage of the times, has gone beyond the scope of the 1999 Ashton professor and the 2005 ITU report referred to, Internet of Things has been labeled a "Chinese style" label.6．BackgroundThe concept of Internet of Things in 1999. Internet-based, RFID technology and EPC standards, on the basis of the computer Internet, the use of radio frequency identification technology, wireless data communication technology, a global items of information to real-time sharing of the physical Internet "Internet of things" (referred to as the Internet of Things) , which is also the basis of the first round of the China Internet of Things boom set off in 2003.The sensor network is built up based on sensing technology network. Chinese Academy of Sciences in 1999 on the start sensor network research and has made some achievements in scientific research, the establishment of applicable sensor network.1999, held in the United States, mobile computing and networking International Conference, "The sensor network is a development opportunity facing humanity in the next century. In 2003, the United States, "Technology Review" proposed sensor network technology will be future changes ten people's lives first.November 17, 2005, the WSIS held in Tunis (WSIS), the International TelecommunicationUnion released ITU Internet Report 2005: Internet of Things ", citing the concept of the" Internet of things ". The report pointed out that the ubiquitous "Internet of Things" communication era is approaching, all the objects in the world, from tires to toothbrushes, from housing to the tissue via the Internet, take the initiative to be exchanged. Radio Frequency Identification (RFID), sensor technology, nanotechnology, intelligent embedded technology will be more widely used.According to the description of the ITU, the era of things, a short-range mobile transceivers embedded in a variety of daily necessities, human beings in the world of information and communication will receive a new communication dimension, from any time communication between people of the place of connection extended to the communication connection between persons and things and things and things. The Internet of Things concept of the rise, largely due to the International Telecommunication Union (ITU), the title of Internet of Things 2005 annual Internet Report. However, the ITU report the lack of a clear definition of Things.Domestic Internet of Things is also there is no single standard definition, but the Internet of Things In essence, the Internet of Things is a polymer application of modern information technology to a certain stage of development and technological upgrading of various sensing technology modern network technology and artificial intelligence and automation technology aggregation and integration of applications, so that the human and material wisdom of dialogue to create a world of wisdom. Because the development of the Internet of Things technology, involving almost all aspects of IT, innovative application and development of a polymer, systematic, and therefore be called revolutionary innovation of information industry. Summed up the nature of the Internet of Things is mainly reflected in three aspects: First, the Internet features that need to be networked objects must be able to achieve the interoperability of the Internet; identification and communication features, that is included in the Internet of Things "objects" must to have the functions of automatic identification and physical objects communication (M2M); intelligent features, the network system should have automated, self-feedback and intelligent control features January 28, 2009, Obama became the President of the United States, held with U.S. business leaders a "round table", as one of the only two representatives, IBM CEO Sam Palmisano for the first time that "the wisdom of the Earth" this concept, it is recommended that the new government to invest in a new generation of intelligent infrastructure.February 24, 2009 news, IBM Greater China CEO money crowd called "Smarter Planet"strategy announced in the forum 2009IBM.This concept was put forth, that is the great concern of the United States from all walks of life, and even analysts believe that IBM's vision is very likely to rise to U.S. national strategy, and caused a sensation in the world. IBM believes that the industry, the next phase of the mission is to make full use of the new generation of IT technology in all walks of life among specifically, is the embedded sensors and equipment to the power grid, railways, bridges, tunnels, highways, buildings, water supply systems dams, oil and gas pipelines and other objects, and is generally connected to the formation of Things.Strategy conference, IBM, and implant the concept of "wisdom" in the implementation of the infrastructure, strong, not only in the short term to stimulate the economy, promote employment, and in a short period of time for China to build a mature wisdom infrastructure platform.IBM "Smarter Planet" strategy will set off again after the wave of Internet technology industrial revolution. Former IBM CEO Lou Gerstner has raised an important point of view, every 15 years, a revolution in computing model. This judgment is the same as Moore's Law accurately call it a "15-year cycle Law". Before and after 1965, changes to the mainframe as a symbol, 1980 marked by the popularization of personal computers, 1995, the Internet revolution. Each such technological change are caused by the enterprise, industry and even the national competitive landscape of major upheaval and change. To a certain extent in the Internet revolution is ripening by the "information superhighway" strategy. 1990s, the Clinton administration plan for 20 years, $ 200 billion to -4000 billion, construction of the U.S. National Information Infrastructure, to create a huge economic and social benefits.Today, the "Smarter Planet" strategy by many Americans that there are many similarities with the "information superhighway", the same they revive the economy, a key strategy for competitive advantage. The strategy can be set off, not only for the United States, such as the Internet revolution was the wave of technological and economic concern, more attention from the world."Internet of Things prospects are very bright, it will dramatically change our current way of life." Demonstration director of the Center of Nanjing University of Aeronautics and Astronautics, National Electrical and Electronic Zhao Guoan said. Industry experts said that the Internet of things to our life personification of the things became a kind of human.Goods (goods) in the world of physical objects associated with each other "exchange", without the need for human intervention.The Internet of Things using radio frequency identification (RFID) technology, to achieve the interconnection and sharing of the automatic identification of goods (products) and information through the computer Internet. It can be said that the Internet of Things depict the world is full of intelligent. In the world of Internet of Things, material objects connected to the dragnet.The second session, held at Peking University in November 2008, China Mobile Government Seminar "Knowledge Society and Innovation 2.0", the experts made the mobile technology, the Internet of Things technology led to the development of economic and social form, innovative forms of change, and promote the The next generation of innovation for the knowledge society as the core of user experience (innovative 2.0) the formation of innovation and development of the form to pay more attention to the user to focus on people-oriented. Research institutions is expected to 10 years, the Internet of Things may be mass adoption of this technology will develop into one of thousands of yuan-scale high-tech market, the industry than the Internet 30 times.It is learned that the things industry chain can be broken down into the identity, perception, processing and information transfer, four links, each link of the key technologies for the wireless transmission network of RFID, sensors, smart chip and telecom operators. EPOSS in the "Internet of Things in 2020" report, an analysis predicted that the future development of the Internet of Things will go through four stages, 2010, RFID is widely used in the field of logistics, retail and pharmaceutical objects interconnect 2010 to 2015, 2015 ~ In 2020, the object into the semi-intelligent, intelligent objects into 2020.As the vanguard of the Internet of Things, RFID has become the most concerned about the technology market. The data show that the global RFID market size in 2008 from $ 4.93 billion in 2007 rose to $ 5.29 billion, this figure covers all aspects of the RFID market, including tags, readers and other infrastructure, software and services. RFID card and card-related infrastructure will account for 57.3 percent of the market, reaching $ 3.03 billion. Application from financial and security industries will drive the market growth of RFID cards. Analysys International forecasts, the Chinese RFID market size in 2009 will reach 5.0 billion, a CAGR of 33%, in which the electronic tag is more than 3.8 billion yuan, the reader close to 700 million yuan, software and services market to reach 500 million yuan pattern.MEMS is the abbreviation of the micro-electromechanical systems, MEMS technology is built on the basis of micro / nano, the market prospect is broad. The main advantage of the MEMS sensoris the small size, large-scale mass production cost reduction, mainly used in two major areas of automotive and consumer electronics. Under ICInsight the latest report is expected in 2007-2012, global sales of semiconductor sensors and actuators based on MEMS will reach 19 percent compound annual growth rate (CAGR), compared with $ 4.1 billion in 2007 to five years will achieve $ 9.7 billion in annual sales.7．PrincipleInternet of Things is on the basis of the computer Internet, RFID, wireless data communications technology, to construct a cover everything in the world's "Internet of Things". In this network, the goods (products) to each other "exchange", without the need for human intervention. Its essence is the use of radio frequency identification (RFID) technology to achieve the interconnection and sharing of the automatic identification of goods (products) and information through the computer Internet.The Internet of Things is a very important technology is radio frequency identification (RFID) technology. RFID is radio frequency identification (Radio Frequency Identification) technology abbreviation, is an automatic identification technology in the 1990s began to rise, the more advanced a non-contact identification technology. The development of RFID technology based on a simple RFID system, combined with existing network technology, database technology, middleware technology, to build a one composed by a large number of networked readers and numerous mobile label, much larger than the Internet of Things trend.RFID, It is able to let items "speak" a technique. In the "Internet of Things" concept, RFID tags are stored in the specification and interoperability information collected automatically by wireless data communications network to a central information system, to achieve the identification of goods (products), and then through the open computer network for information exchange and sharing, items "transparent" management.The information technology revolution in the Internet of Things is referred to as IT mobile Pan of a specific application. Internet of Things through IntelliSense, identification technology and pervasive computing, ubiquitous network convergence applications, breaking the conventional thinking before, human beings can achieve ubiquitous computing and network connectivity [3]. The traditional thinking has been the separation of physical infrastructure and IT infrastructure: on the one hand, airports, roads, buildings, while on the other hand, the data center, PC, broadband. In theera of the "Internet of Things", reinforced concrete, cable with the chip, broadband integration into a unified infrastructure, in this sense, the infrastructure is more like a new site of the Earth, the world really works it, which including economic management, production operation, social and even personal life. "Internet of Things" makes it much more refined and dynamic management of production and life, to manage the future of the city to achieve the status of "wisdom" to improve resource utilization and productivity levels, and improve the relationship between man and nature. 8．Agency1, institution-buildingAs the first national Internet of Things industry community organizations - the application of professional Committee of China Electronic Chamber of Things technology products (referred to as: "objects of the IPCC"), the Ministry of Civil Affairs in June 2010, preliminary approved by the Ministry of August being reported that the Ministry of Civil Affairs for final approval.2, the main taskServe as a bridge between business and government to assist the Government of the industry guidance, coordination, consultation and services to help members to reflect the business requirements to the Government; coordinate the relationship between enterprises to strengthen technical cooperation, product distribution, the elimination of vicious competition ; supervision of members the correct implementation of national laws and regulations, to regulate the industry; member of information communication technology products, cooperation, resource sharing, capital operation, and promote the application of Internet of Things technologies and products, and promote the Internet of Things industrial scale , co-development.9．ConstructionInternet of Things in the practical application to carry out requires the involvement of all walks of life, and need the guidance of the national government as well as related regulations and policies to assist the launching of the Internet of Things has the scale, broad participation, management, technical, and material properties, etc. other features, the technical problem is the most crucial issues of Things billion Bo logistics consulting, Internet of Things technology is an integrated technology, a system not yet which company has overall responsibility for network planning and construction of the entire system, theoretical studies have commenced in all walks of life and the practical application is limited to within the industry. The key is on the planning and design andresearch and development of the Internet of Things research in the field of RFID, sensors, embedded software, and transmission of data calculation. In general, to carry out the steps of the Internet of things mainly as follows:(1) identified the object attributes, properties, including static and dynamic properties of the static property can be stored directly in the label, the dynamic properties need to start with sensors to detect real-time;(2) the need to identify the equipment to complete the reading of object attributes, and information into a data format suitable for network transmission;(3) the object of information transmitted over the network to the information processing center (processing center may be distributed, such as home computers or mobile phones, may also be centralized, such as China Mobile IDC) by the processing center to complete the object communication calculation.10．key areasInternet of Things 4 key areas:(1) RFID;(2) sensor network;(3) The M2M;(4) integration of the two.11.TrendIndustry experts believe that the Internet of things on the one hand can improve economic efficiency and significant cost savings; the other hand, can provide technical impetus to global economic recovery. Currently, the United States, the European Union are all invested heavily in-depth study to explore the Internet of Things. The country is also highly concerned about the emphasis of Things, Industry and Information Technology Ministry in conjunction with the relevant departments are conducting research in a new generation of IT to the formation of policies and measures to support the development of a new generation of IT.China Mobile CEO Wang Jianzhou has repeatedly mentioned the Internet of Things will become the focus of future development of China Mobile. He will be invited to Taiwan to produce RFID, sensors and bar code manufacturers and China Mobile. According to him, the use of the Internet of Things technology, Shanghai Mobile has a number of industrial customers tailor the datacollection, transmission, processing and business management in one set of wireless application solutions. The latest data show that Shanghai Mobile has more than 100,000 chips mounted on a taxi, bus, various forms of matter networking applications in all walks of prowess, to ensure the orderly operation of the city. During the Shanghai World Expo, "the bus services through" will be fully applied to the Shanghai public transport system, the smooth flow traffic to the most advanced technology to protect Expo area; for logistics transportation management, e-logistics ", will provide users with real-time accurate information of Cargo, vehicle tracking and positioning, the transport path selection, logistics network design and optimization services greatly enhance the comprehensive competitiveness of logistics enterprises.In addition, the popularization of the "Internet of Things" for the number of animals, plants and machinery, sensors and RFID tags of items and related interface devices will greatly exceed the number of mobile phones. The promotion of the Internet of Things will become a drive to promote economic development for the industry to open up a potential development opportunities. According to the current demand on the Internet of Things, in recent years, billions of sensors and electronic tags, which will greatly promote the production of IT components, while increasing the number of job opportunities.According to reports, it is necessary to truly build an effective Internet of things, there are two important factors. First, the scale, only with the scale to make the items of intelligence play a role. For example, a city of one million vehicles, if we only 10000 vehicles installed on the smart system, it is impossible to form an intelligent transportation system; two mobility items are usually not static, but in the state of the movement , we must maintain the items in the state of motion, and even high-speed motion state can at any time for dialogue.FORRESTER of the authority of the U.S. advisory body predicted that 2020, the world of business of the Internet of Things, compared with the business of interpersonal communication, will reach 30 to 1, so the "Internet of Things" is known to be the next one trillion communications services.Internet of Things heat wave Why is rapidly growing in China? Internet of Things in China rapid rise thanks to the several advantages of our country in terms of things.In the early 1999 launched the Internet of Things core sensor network technology research, R & D level in the world; the second, sensor network field in the world, China is the standard one ofthe dominant country, the patent owner; third China is one of the countries to achieve a complete industrial chain of Things; Fourth, China's wireless communications network and broadband coverage provides a solid infrastructure to support the development of the Internet of Things; Fifth, China has become the world's first the three major economies, with strong economic strength to support the development of the Internet of Things.12.MythThe current understanding of the Internet of things there are a lot of misunderstanding, which is also a direct impact on our understanding of Things on the development of the logistics industry, it is necessary first to distinguish errors, clarify our thinking.One sensor networks or RFID network equivalent of Things. The fact that sensor technology, or RFID technology, or are simply one of the information collection technology. In addition to the sensor technology and RFID technology, GPS, video recognition, infrared, laser, scanning can be achieved automatically identify physical objects to communicate technical information collection technology can become the Internet of Things. Sensor networks or RFID network is just an application of Things, but not all of Things.Second, the Internet of Things as a myriad of unlimited extension of the Internet of Things as a completely open for all things, all of the interconnections, all shared Internet platform.In fact, the Internet of Things is not simple infinite extension of the global sharing of the Internet. Even if the Internet is also not only refers to we typically think of the international sharing computer network, Internet, WAN and LAN. Internet of Things can be both an extension of our usual sense of the Internet to the matter; LAN, professional can also be based on real needs and industrial applications. The reality is not necessary and can not make all the items networking; no need to make professional, LAN must be connected to the global Internet sharing platform. Of things in the future the Internet will be very different from the professional network of similar smart logistics, smart transportation, smart grid; the intelligence community and other local area network is the largest use of space.Ter, that the ubiquitous network of the Internet of Things Internet of Things, and therefore the Internet of Things is a castle in the air, is difficult to achieve the technology. In fact the Internet of things are real, many of the primary Internet of Things applications already for our services. The Internet of Things concept is introduced in many real-world applications based on polymericintegrated innovation, pre-existing network with the Internet of Things, intelligent, automated system, summarized and upgrading it upgraded from a higher perspective our knowledge.Four of Things as a basket, and everything installed inside; based on self-awareness, and only be able to interact, communication products as the Internet of Things applications. For example, just embedded some of the sensors, to become the so-called Internet of Things appliances; products labeled with RFID tags, became the Internet of Things applications.esThings widely used throughout the intelligent transportation, environmental protection, government, public safety, peace at home, smart fire, industrial monitoring, environmental monitoring, elderly care, personal health, floriculture, water monitoring, food traceability, enemy detection and intelligence collection and other fields.International Telecommunication Union in 2005, a report has portrayed the picture of the era of the "Internet of Things": car when the driver operational errors will automatically alarm; briefcase will remind the owner forgot something; clothes will "tell" washing machine color and water temperature requirements. Billion Bo logistics consulting vivid introduction of Things in the logistics field, for example, a logistics company, application of Things truck, when loading overweight, the car will automatically tell you overloaded and overload how many, but the space remaining , the severity of goods with how to tell you; when handling staff unloading a cargo packaging may be shouting "throw you hurt me", or "My dear, you do not get too barbaric, you can?"; when the driver and others gossip, trucks will pretend boss's voice roaring "stupid, the grid!Internet of things to make full use of a new generation of IT technology in all walks of life among, specifically, is embedded sensors and equipment to the power grid, railways, bridges, tunnels, highways, buildings, water systems, dams, oil and gas pipelines, etc.kinds of objects, and then "Internet of Things" with the existing Internet to integrate and realize the integration of human society and the physical system, which in this integrated network, there is the ability to super-powerful central computer cluster, integrated network staff implementation of real-time management and control of the machinery, equipment and infrastructure, on this basis, the human can be more refined and dynamic management of production and life, to achieve the status of the "wisdom", to improve resource utilization and productivity levels, and improve human the relationship between the natural.。
减速器论文中英文对照资料外文翻译文献
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111 Chin．Geogra．Sci．2009 19(1)017-024 DoI：10．1007／s11769．009．ool7．O
wvoog．springerlink．com
Relationship Between Economic Growth and Water Environmental Quality of Anshan City in Northeast China
GU Kangkan91一，LIU
Jingshuan91，WANG
Yan91
(Northeast Institute ofGeography and Agroecology,Chinese Academy ofSciences,Changchun 13001Z China； 2．Graduate University
ofthe Chinese
Academy ofSciences,Beijing
100049,China)
Abstract：Based on the decomposition model of environmental quality and univariate regression model．the relation． ships of industrial wastewater drainage with economic scale。economic structure。and technological level in Anshan，a mining city in Northeast China，wcTe studied．The results showed
that，due to scale
effect，the
drainage of three impor- rant industrial wastewater pollutants(COD，NH3-N and petroleum)increased 8505t，671 t
and 384t，respectively,and
due to structure effect．those pollutants drainage increased 3996t．174t and 120t from 2001 to
2006．While due to
technological effect，the drainage of COD，NH3一N and petroleum reduced 4452t，458t and 33 It，and due to cross
effect， those pollutants drainage reduced 7270t，575t and 476t simultaneously．Meantime．the relationships between household consumption structure and domestic sewage discharge were analyzed，and domestic sewage discharges
in different in-
come levels were also compared．The results showed that,the domestic sewage discharges
would increase 376t wim
1000 yuan(RMB)increased in the traffic and communication consumption，and they would be 344t，219t，428t，
1873t， respectively,in housing consumption，food consumption,medical consumption，miscellaneous commodity consump- tion．111e proportion of domestic sewage discharge increased for high income residents significantly,but
reduced for lower income residents．The industrial wastewater pollutants drainage tends to be reduced
by
technical
progress．while domestic sewage discharge will be a more important factor for urban water
environment
quality． Keywords：Environmental Kuznets Curve；decomposition model of environmental quality；regression
analysis； household consumption structure；Anshan
City
1 Introduction method were made(Andreoni
and
Levinson，200
1： Coondoo and Dinda，2002；Liu et a1．，2005；Managi and Environmental degradation is a big concern both in the Jena，2008)．However,some researchers pointed
out that environment science and in our life．Many researchers the model is too simple，and could not prove
an
inevita- have examined the relationship between the economic ble link between the income level and environmental growth and environmental quality(Cole，2007；Li，2007； pollutants(Arrow et a1．，1995；Ekins，
1997；Ezzati et a1．，
Bartz and Kelly,2008)，and the debate on the environ． 200 1：Dinda，2004)．It is well known that the
relation． mental effects of economic growth since the early 1 990s ship between economic growth and environmental pol
— has been strongly influenced by the Environmental lutant is complex．The changes of industrial structure Kuznets Curve(EKC)hypothesis．Tllis hypothesis pos-
and technology often not only simply influence the e
伍一 tulates that there is an inverted U—shape relationship ciency of resources use，but also involve in
the devel． between environmental pressures and per capita income． opment of new
processing technique
and products that
Due to its theoretical basis with concise index system might pose less environmental 112
18 GUKangkang,LILtJingshuang,WANG]rang
The analysis on economic structural decomposition
Liaodong Peninsula，Anshan City's
transportation is and household consumption has been a new research on
convenient谢廿l
highways，
railways，expressways and t11e relationship between the economic growth and ell- airlines(Fig．11．Anshan is in
the southeastern part of the
vironmental quality．Roca and Serrano(2007)made a Songliao Plain with
continent monsoon climate．Thc
av-
s仃1Ictllml decomposition analysis on the relationship erage annual temperature is 10．9℃．and the
annual pre． between income growth and nine atmospheric pollutants cipitation is 762mm．With the GDP
growth over
the
past
in Spain in l 995-2000 to estimate the contribution of
two decades averaging
around 1 4．78％in 1 985-2005． vario哪factors to changes in the levels of atmospheric Anshan City’s
environmental pollution is increasingly
emissions．Hanna(2008)took all empirical
examination
getting worse．In 2005，Anshan City’s pollutants
dis- of how a community’s income growth was affected by charge reached 79．4×10’t’46x100t