How to prevent wave soldering from igniting during soldering
抗雷击 英语
抗雷击英语Lightning is a powerful and awe-inspiring natural phenomenon that has captivated the human imagination for centuries. It is a sudden and intense electrical discharge that occurs during a thunderstorm, resulting in a bright flash of light and a loud crack or boom. While lightning can be a beautiful sight, it can also be incredibly dangerous, posing a significant threat to both people and property. As such, the development of effective lightning protection systems has become a critical concern for individuals, businesses, and communities around the world.At its core, lightning protection is the process of safeguarding against the damaging effects of lightning strikes. This involves the installation of specialized equipment and systems designed to divert the electrical current of a lightning strike away from vulnerable structures and people. The primary goal of lightning protection is to prevent the catastrophic damage that can result from a direct lightning strike, including fires, structural damage, and loss of life.One of the most important components of a lightning protectionsystem is the lightning rod. Also known as a Franklin rod, this metal rod is typically installed on the highest point of a building or structure, providing a direct path for the electrical current to flow into the ground. When lightning strikes, the current is directed away from the building and into the ground, where it can be safely dissipated. This helps to prevent the lightning from igniting fires or causing other types of damage.In addition to lightning rods, lightning protection systems may also include other elements, such as grounding systems, surge protectors, and bonding connections. Grounding systems are designed to provide a low-resistance path for the electrical current to flow into the earth, while surge protectors help to absorb and dissipate any excess electrical energy that may be generated by a lightning strike. Bonding connections, on the other hand, are used to ensure that all conductive components of a building or structure are connected to the same electrical potential, reducing the risk of electrical arcing or sparks that could ignite fires.One of the key benefits of a well-designed lightning protection system is its ability to significantly reduce the risk of damage and injury caused by lightning strikes. By diverting the electrical current away from vulnerable areas, these systems can help to protect both people and property from the devastating effects of lightning. This is particularly important for structures that are located in areas with ahigh risk of thunderstorms or lightning activity, such as those in coastal regions or mountainous areas.Another important aspect of lightning protection is the need for regular maintenance and testing. Over time, the components of a lightning protection system can become worn or damaged, reducing their effectiveness. Regular inspections and testing can help to identify any issues or problems, allowing for timely repairs and ensuring that the system remains in optimal working condition.In addition to the technical aspects of lightning protection, there are also important safety considerations to keep in mind. During a thunderstorm, it is crucial to avoid being in or near tall, isolated structures, as these can act as lightning rods and increase the risk of being struck. It is also important to avoid being in open areas, such as fields or bodies of water, as these can also increase the risk of being struck by lightning.One of the most effective ways to protect against lightning is to seek shelter in a sturdy building or vehicle as soon as a thunderstorm approaches. Inside a building, it is important to avoid contact with conductive surfaces, such as plumbing, electrical equipment, and windows, as these can conduct electricity and increase the risk of injury or death.In conclusion, lightning protection is a critical concern for individuals, businesses, and communities around the world. By installing specialized equipment and systems, and following important safety guidelines, it is possible to significantly reduce the risk of damage and injury caused by lightning strikes. Whether you are a homeowner, business owner, or community leader, taking steps to protect against lightning is an important investment in the safety and well-being of your property and your loved ones.。
如何减少噪音污染的方法英语作文
如何减少噪音污染的方法英语作文How to Reduce Noise PollutionHave you ever tried to study or sleep but couldn't because of loud noises all around you? Noise pollution is a big problem that affects us all, especially kids like me. It can make it hard to concentrate, give us headaches, and even damage our hearing over time. But the good news is that there are things we can do to reduce noise pollution and make the world a little quieter.What is Noise Pollution?Noise pollution is any unwanted or excessive sound that disrupts the environment. It comes from things like traffic, construction, airplanes, factories, and even loud music or noisy neighbors. All that noise can be really annoying and even harmful to our health.Why is Noise Pollution Bad?Noise pollution doesn't just make it hard to hear. It can also cause stress, headaches, high blood pressure, and trouble sleeping. It can even lead to hearing loss over time, especially for kids whose ears are still developing. Plus, loud noises can scare away animals and disrupt their habitats.So what can we do about all this noise? Here are some tips to help reduce noise pollution:Use Quieter TransportationA lot of noise pollution comes from cars, trucks, and other vehicles on the road. One way to cut down on traffic noise is to walk, bike, or take public transportation instead of driving when you can. Electric vehicles are also much quieter thangas-powered ones.Keep It Down at HomeWe can all do our part to reduce noise at home. Turn down the volume on TVs, music players, and video games. Close windows to block out street noise. And try to do noisy activities like laundry or vacuuming during the day when fewer people are trying to sleep.Be a Quiet NeighborRemember that the noise you make can bother the people living around you. Don't have super loud parties or play loud music late at night. And keep barking dogs inside so they don't disturb the whole neighborhood.Use Noise BarriersSpecial walls or barriers made of materials like concrete, wood, or plastic can help block noise from highways, construction sites, and other loud areas. Cities and towns can install these barriers along busy roads or around schools and parks to create quieter spaces.Reduce Industrial NoiseBig factories, power plants, and construction sites produce a lot of noise pollution from their machines and activities. Companies should use better noise-control equipment and follow rules about noise levels. They can also schedule loud work during the day instead of at night.Create More Green SpacesTrees, plants, and soil are great for absorbing sound waves and reducing noise. Having more parks, gardens, and other green areas in cities can help make them quieter places. Trees act like natural noise barriers!Support Stricter Noise LawsMany places have laws that limit noise levels, like for things like construction work or vehicle noise. But these laws could be better enforced and updated to keep up with new noiseproblems. We should support leaders who want to crack down on excessive noise.Teach About Noise PollutionThe more people learn about how bad noise pollution is, the more they might be willing to do something about it. Schools can teach kids like me about the causes and impacts of too much noise. That way, we can grow up knowing how to keep things quieter.Noise pollution might seem like a small problem, but over time, all that extra noise can really disrupt our lives and even make us sick. By following tips like these and working together, we can turn down the volume on noise pollution and create a calmer, healthier, and more peaceful world for everyone. Let's keep things quiet out there!。
I.C.T在线选择波焊 Soldering 机器介绍说明书
Online Selective Wave Soldering MachineIntroduce:Selective wave soldering is a special form of wave soldering invented to meet the development requirements of through-hole components soldering.It is mainly suitable for the soldering of through-hole components in high-end electronic products.For example:military electronic products,automotive electronics,switching power supply products and other industries which require higher soldering reliability.I.C.T online selective wave soldering is a high performance equipment developed and assembled in China.For higher flexibility or multiwave soldering for high-volume processes.Parallel process due to the separation of fluxing,preheating and soldering,operation of up to two spray heads,up to five lower preheating with upper convection heating,perfect for the connection to assembly stands and periphery,connection to traceability systems for process control.Features:1.PCB plate fixed,spray and soldering platform moving;2.High soldering quality,greatly improve the pass rate of soldering;3.Modular design of SMEMA online transportation,support customers for flexible line formation;4.Full PC control.All parameters can set in PC and saved to PCB menu,like moving path,solder temperature,flux type,solder type,N2 temperature etc,best trace-ability and easy to get repeat soldering quality;5.Auto wave height calibration function,to check&calibrate wave’s height after every certain PCB,so to keep a very good stability of wave;D Mark positioning function,to check PCB’s mark point after every certain PCB;7.Self design motion table with cast aluminum,lighter weight with quick motion speed;8.Panasonic servo motor&driver provide stable,with ball screw&linear guild rail,less noise,stable movement;9.With dust proof plate above motion table,so to avoid flux or solder drop to damage ball screw;10.The jet valve originated in Germany is selected with small flux dot,please note flux solid content should be less than10%;11.Flux is stocked by pressure tank,make sure pressure stable without influenced of amount of flux;12.Electromagnetic pump coil adopts German imported brand to ensure the stability and reliability of the peak;13.Solder pot is made of stainless steel with anti-corrosion coating,not leakage,also Stainless steel can be used according to customer requirements;14.With cast iron heater outside,robust&quick heat up;15.N2online heating system,to wet the soldering perfectly and reduce the solder dross;16.With stainless steel roller for conveyor,not wearable with long term usage.Features1Flux system:Flux Overview1.German high-frequency pulse injection valve to get precious fluxing result with small flux dot,flux solid content should be less than10%.Theflux nozzle jam detection function is optional.2.It is configuration with tray under the jet valve to catch the flux residue for easy maintenance.3.The nozzle is mounted on the XY platform,the accuracy of repetition and positioning can reach0.02mm.4.Flux is stocked by pressure tank,make sure pressure stable without influenced of amount of flux.5.High precision pressure flow meter is used for flow control and corrosion resistant material is used.6.All pneumatic components are made of Japanese SMC brand.7.Flux pressure flow meter and nitrogen flow are placed on the surface of the machine for visual operation.8.The external humanized design is convenient for operation and adjustment.9.SMC brand automatic extraction pump is adopted to ensure stable flux supply. Features2Preheat system:Preheat Overview1.The machine is equipped with bottom IR preheating as standard,and the preheating area can be set;top hot air preheating,infrared heatingConduction is efficient and stable.2.Design structure for maximizing preheating area.3.All round high temperature cotton design to ensure temperature stability.4.Heat-generating and heat-conducting parts and motors adopt top brands.5.Maintenance plug-in design,tool-free maintenance mode.Soldering Overview1.Electromagnetic pump coil adopts Sweden“PRECIMETER”brand to ensure the stability and reliability of the peak.2.Solder temperature,N2temperature,wave height,wave calibration etc all able to set in software.3.Solder pot is made of stainless steel with anti-corrosion coating,not leakage.With cast iron heater outside,robust&quick heat up.4.N2online heating system,to wet the soldering perfectly and reduce the solder dross.5.Best tin spraying stability in the industry.6.Real time visual monitoring and video can be saved and traced for900hours.7.Visual fast programming to improve programming reliability and efficiency.8.XYZ platform is composed of high precision lightweight sports module and high-speed servo motor.9.All servo motor are equipped with reducer to ensure stability.10.Sealed and protected,anti pollution treatment.11.Omron Magnetic sensor,Ensure more accurate movement.13.Cleaning frequency can be adjusted flexibly.ser detection system for soldering wave height.15.German“SICK”non-contact laser sensor is used to ensure measurement accuracy,no pollution and no error measurement.16.Rational Design of Nozzle Cleaning and Measuring Mechanism.Features4Transmission system:Transmission Overview1.Special material profiles ensure stability,and rational design ensures convenience.2.The transmission module is composed of the roller.3.PCBA side clamp and top clamp system can ensure the stability of the board.4.Thickened customized rail,20KG load.5.Independent work control of each area of the transportation system.6.The motor and pneumatic components are all Japanese brands.7.More simple and convenient rational design.8.The transportation buffer zone is set to ensure the smooth operation of PCBA without collision.9.The detailed design of different PCBA design processes shall be carried out to ensure zero error measurement of PCBA.10.Solder parts PCBA clamping mechanism for different PCBA and different fixtures.Features5Control system:Controlbox Overview1.Keyence KV7500PLC+Keyence module high-end bus control system,ensure the stability and extensibility of the system.2.Conform to CE and other standards.3.Underfloor design of Industry4.0.4.Ensure the capacity improvement,add the underlying control of the soldering machine module,and ensure the stability.5.Application of global high-quality stability electrical parts.6.Cat-6network cable,faster communication speed and sensitive response.Operating Overview1.Guided programming mode.D fast programming function.3.Picture programming,make coordinate correction,coordinate intelligent verification.4.Real time data visualization of interface.One button switching of CCD soldering real-time monitoring interface.5.Chinese,English,can be switched.1.Standards and adaptability of MES,WIFI connection,online software upgrade,remote control,intelligent.2.Soldering data can be traced to confirm the process of each soldering point.Other Features:Fan outlet diversion and prevention Motor with a reducer for more stable Computer cooling type holderProtection for all connecting wire Adjustable operating height Additional protection of all access linesPump Comparison:ComparisonElectromagnetic pump Mechanical pumpMade in Sweden Made in ChinaWave stability Wave stabilityMaintenance free Regular maintenance Influence of ambient temperature Mechanical drive,mature technology Repair free,overall replacement,high cost Widely used and low maintenance costNo.Item SS540SS5501ControlsystemPC and PLC.Real time monitoring camera.Controller and control card.1setPC and PLC.Real time monitoring camera.Controller and control card.1set2DrivesystemSpary and soldering in same platform.XYZ axis:high speed motion module for sparyand soldering.The platform is all aluminum cast.1set2axis platform for spray.XY2axis:high speed motion module for spray.XYZ3axis:high speed motion module for soldering.The platform is all aluminum cast.1set3SpraysystemImported fluiding jetting valve.Flux pressure tank.Spray pneumatic control.Nozzle automatic cleaning system.1setImported fluiding jetting valve.Flux pressure tank.Spray pneumatic control.Nozzle automatic cleaning system.1set4HeatingsystemHot air top and bottom IR heater1set Hot air top and bottom IR heater1set5Solderingsystem11kg tin pot,electromagnetic pump drive.Pot over temperature and liquid level alarmdevice.Pot temperature control system.N2independent temperature control system.Five soldering nozzles(inner diameter3mm,4mm,6mm,8mm,10mm)as standard.3axis platform for soldering.3axis:high speed motion module for soldering.3axis:servo motor+retarder&Driver forsoldering.The platform is all aluminum cast.1set11kg tin pot,electromagnetic pump drive.Pot over temperature and liquid level alarm device.Pot temperature control system.N2independent temperature control system.Five soldering nozzles(inner diameter3mm,4mm,6mm,8mm,10mm)as standard.3axis platform for soldering.3axis:high speed motion module for soldering.3axis:servo motor+retarder&Driver for soldering.The platform is all aluminum cast.1set6HandlingsystemRoller transport guide for soldering.PCB blocking device for spray and soldering.PCB side clamping system.1setIndependent step transport system for spraypreheating.PCB blocking device for spray preheating.Independent step transport system for soldering.Roller transport guide for soldering.PCB blocking device for soldering.PCB side clamping system.1set7MESsystemSupport1set Support1setLeading Advantage:No.Item I.C.T Other Brand Comparison1Double solder potdriveDouble Y axis Single Y axisAdvantages of dual Y-axis independent:each tin pot cansoldering any position within the PCB,and it can also beconfigured with different nozzles sizes for PCB soldering,or itcan soldering the panel PCB at the same time.2Soldering wave heightdetectionNon-contact lasersensorContact-type sensorI.C.T's non-contact laser detection has higher precision andmore accurate results.The probes of other companies'Contact-type detection methods are easy to be polluted,affecting the detection accuracy.3Solder nozzle typeidentifyOption N/A Some companies do not have this function.4Soldering nozzleJet-flow status realtime monitoringOption N/A Some companies do not have this function.5Solder wave heightmonitoringOption N/A Some companies do not have this function.6Solder wave cutoffmonitoringOption N/A Some companies do not have this function.7Tin pot liquid levelmonitoringHigh precisionsensorDifferential pressuregaugeTraditional differential pressure sensor has large error,falsealarm and inaccuracy.8Wave solderingstability±0.2mm±1.0mmThe real data±0.2mm measured by KEYENCE's laser sensor,the wave soldering stability of I.C.T is leading in the industry.I.C.T selective wave soldering has a number of leading and mature technology applications.No.Item Brand Original1PLC Keyence Japan2Solder pot PRECIMETER Sweden3Spray Nozzle Jet Valve Germany4Servo motor Panasonic Japan5Servo driver Panasonic Japan6Camera Toshiba/Hikvision Japan7Solder Nozzle Customized Japan8Ball Screw THK/Hiwin Japan/Taiwan 9Sensor OMRON,KEYENCE Japan10Stepper motor Panasonic Japan11Pneumatic Component SMC Japan 12SSR Carlo Switzerland 13Boxrelay ABB/Schneider Switzerland14Contactor ABB/SchneiderSwitzerland 15ACcontactor ABB/Schneider Switzerland 16Sensor Keyence/Sick Japan/Germany 17Fiber sensorKeyence/Sick Japan/Germany 18Magnetic components SMC Japan 19Switch MW Taiwan 20BearingNSKJapan 21Other Electrical Component IDEC,Mitsubishi,Fuji Japan 22Heating TubeSAKAGUCHIJapanModelSS540SS550SS550P1SS550P2PhotoOn-line Modular Spray +Preheating &SolderingSpray +Preheating +SolderingSpray +Preheating +Soldering1+Soldering 2Spray +Preheating +Soldering 1+Soldering 2+Soldering 3Soldering System Nozzle Quantity 1123Solder Pot Quantity 1set 1set 2set 3set Double Pot (Option)N/A Option Option Option Solder Pot Power 2.35kw2.35kw4.70kw7.05kwSolder Capacity 11KgSolder PotStainless steel +Japan SURF high temperature resistant and corrosion resistant processNozzle Inner Diameter Φ3-30mm (Customization Special dimensions)Wave Height 3~5mm Soldering Precision ±0.25mmSolder Pot Drive Single Pot:XYZ independent driveDual Pot:Dual Y axis,dual Z axis independent drive,synchronous or asynchronous action.(Option)Dual Pot Clearance Min:110mm~300mm (Only for dual soldering pot)Solder Pot Liquid Level DetectionHigh precision sensorSoldering Wave Height DetectionLaser sensorSolder Pot Z Axis Move50~100mm/sSpeedSoldering Monitoring CCDWave Control Electromagnetic pump(Sweden)Solder Pot Temperature Room Temperature~300℃Heating Control PID+SSRTemperature Accuracy±1℃Warm-up Time<60min(setting300℃)Flux SystemFlux Storage Tank1L1L2L2LFlux Support Flux Alarm,AutomaticSpray Nozzle Germany Jet Valve(Spot and line spraying)1setSpray Nozzle Size130um(180um,210um Option)Spray Range3~8mmSpray Speed0~20mm/sSpray Nozzle Move0~400mm/sSpeedSpray Precision0.1mmSpray Pressure0.05~0.1MPaSpray Flow Control Electronic Flow Meter1setFlux Tank Pressure tankAlcohol Tank Pressure tankPreheating SystemPreheating Mode Hot air and IR Hot air and IR Hot air and IR Hot air and IR Preheating Area L500*W500mm L500*W500mm L500*W500mm L500*W500mm Preheating Zone Top hot air:2,Bottom IR:1Top hot air:2,Bottom IR:1Top hot air:2,Bottom IR:1Top hot air:2,Bottom IR:1Bottom PreheatingMax.12kwPowerTop Preheating Power Max.6kw Max.6kw Max.6kw Max.6kw Preheating Temp.Room Temperature~250℃Warm-up Time Approx.15min(setting150℃)Control Mode PC+PLCTransport SystemPCB Size(with fixture)120*60~500*500mmPCB Replacement OnlineComponents Lead≥0.5mmPin PitchComponents and Pad≥1.5mmClearancePCB Top Clearance120mm PCB Bottom Clearance60mm PCB Weight<15KG PCB Thickness0.5-6.0mm Clearance fromPCB Edge4mm Transport Height900±20mm Transport Direction L to R(R to L) Transport Width60~500mm Width Adjustment AutoTransport Mode Roller,segmentedtransportationRoller,segmentedtransportationRoller,segmentedtransportationRoller,segmentedtransportationSoftware SystemOperating System Windows10Language Chinese,English can be switched. Programming Mode CCD fast online program.Offline program,Picture program. Program Import CCD shooting,Picture importFacilityN2Purity Purity of N2:99.999%,25L/min,Outer diameterΦ6mm N2Pressure0.5~1.0MPaN2Pressure Monitoring Low pressure automatic alarmN2Consumption(1.5m³/h~2m³/h)/PotAir Pressure4~6Kg/cm²Air Pressure Monitoring Low pressure automatic alarmAir Source Flow8~12L/minCompressed AirConsumption≤0.014m³/hPower Supply 3P5W,380V AC±10%,50/60HZ3P5W,380V AC±10%,50/60HZ3P5W,380V AC±10%,50/60HZ3P5W,380V AC±10%,50/60HZPower52A,21Kw52A,21Kw52A,43Kw52A,43Kw Operate Power5-8Kw7-10Kw10-12Kw10-12Kw Exhaust Volume700m³/hExhaust Pipe DiameterΦ190mm*2Dimension L1850*W1850*H1480mmL2560*W1750*H1480mm L2560*W1950*H1480mm L2600*W1950*H1480mmWeight Approx:800kg Approx:1200kg Approx:1300kg Approx:1500kgNo.Item Spec.1Flux spray clogging monitoring Real-time monitoring of spraying clogging 2Tin furnace liquid level detection High-precision sensor liquid level detection 3Automatic tinning device TinΦ2mm,Max.4kg4Wave height detection KEYENCE laser imaging wave height sensor,digital monitoring of wave height.5Real-time monitoring of nozzle jet flow status.Nozzle spray height monitoring,flow monitoring.6Barcode scanner/7Wave control Mechanical pump8Nozzle model identification Soldering nozzle type auto identifyStandard Accessories:No.Item Quantity1Soldering nozzle3/61pcs2Soldering nozzle4/81pcs3Soldering nozzle6/101pcs4Soldering nozzle8/121pcs5Soldering nozzle10/141pcs6Nozzle cleaning fluid,NC02H-0111pcs7Nozzle cleaning powder,NC02H-0211pcs8Manual1book9Tool Case1set*Attachments may change with product upgrade.If different,please follow the new list.Recommend Spare Parts:No.Item Brand Quantity Usually replacement cycle 1Nitrogen seal top I.C.T1pcs6months2Nitrogen seal bottom I.C.T1pcs6months3Drainage tube I.C.T1pcs1year4Flux filter I.C.T1pcs6months5Flux nozzle I.C.T1pcs N/A6Soldering nozzle I.C.T1pcs1monthSS540Customers: Country Product1Japan Toyota&Honda,etc Automotive Electronics2Japan Toyota,etc Japanese Automotive Electronics3Italy&Japan Automotive Electronics4Japan Automotive Electronics5Japan Medical Equipment6Japan Camera Equipment*I.C.T keeps working on quality and performance,specifications and appearance may be updated without particular notice.YouTube Video Link:https://youtu.be/eQKYI6P4r60https://youtu.be/VgzNyreLSE4Thanks for choosing I.C.T.I.C.T looks forward to win-win cooperation.Thank you.。
解决噪音的方法英语作文
Noise Pollution and Its SolutionsIn today's world, noise pollution has become a significant issue that affects the quality of life for millions of people. Noise, whether it's the constant roar of traffic, the blaring of loudspeakers, or the constant buzz of machines, can be intrusive and disruptive, leading to stress, anxiety, and even physical health issues. Therefore, it's crucial to understand the sources of noise pollution and explore effective solutions to mitigate its impact.One of the primary sources of noise pollution istraffic congestion. As cities grow and more people own vehicles, the number of cars on the road increases, leading to constant honking and the sound of engines. To address this issue, cities can implement traffic calming measures such as speed humps, traffic lights, and one-way streets. Encouraging public transportation use, promoting cycling and walking, and limiting the number of private vehicles on the road can also help reduce noise pollution from traffic. Another significant source of noise pollution is construction work. Construction sites can be noisy, withthe sound of heavy machinery, drilling, and hammeringfilling the air. To minimize noise pollution from construction, construction companies can use quieter machinery, implement noise barriers, and schedule noisywork during off-peak hours. Additionally, authorities can enforce strict noise pollution regulations to ensure that construction companies adhere to noise reduction measures.Loudspeakers and amplifiers are also common sources of noise pollution, especially during festivals, weddings, and other events. To prevent noise pollution from these sources, event organizers can use sound limiters and ensure that the volume is kept at a reasonable level. Additionally, authorities can issue noise pollution fines and implement noise regulations to ensure that event organizers complywith noise reduction measures.Individuals can also contribute to reducing noise pollution by adopting simple yet effective practices. For instance, they can turn down the volume of their television, radios, and other audio devices. They can also avoid using noisy appliances during late evenings and early mornings to prevent disturbing their neighbors. Additionally,individuals can choose to live in areas that are less noisy and avoid visiting noisy places during peak hours.In conclusion, noise pollution is a significant issue that requires collective effort to address. By implementing traffic calming measures, enforcing noise regulations, using quieter machinery, and adopting noise-reduction practices, we can mitigate the impact of noise pollution and improve the quality of life for everyone.**噪音污染及其解决方案**在当今世界，噪音污染已成为影响数百万人生活质量的重大问题。
怎么预防采光问题英语作文
怎么预防采光问题英语作文英文：To prevent lighting problems, there are several things that can be done. Firstly, choosing the right window treatments can help control the amount of light that enters a room. For example, using blinds or curtains that can be adjusted to let in just the right amount of light can be very effective. Additionally, using light-colored or reflective surfaces in a room can help to bounce light around and create a brighter, more evenly lit space. 。
Another way to prevent lighting problems is to strategically place mirrors in a room. Mirrors can help to reflect natural light and make a room feel brighter and more spacious. For example, I have a mirror positioned across from a window in my living room, and it really helps to amplify the natural light that comes in.Furthermore, using the right type of light bulbs canalso make a big difference. For areas that need bright, focused light, such as a kitchen or workspace, using daylight or cool white bulbs can help to mimic naturallight and prevent any dimly lit areas. On the other hand, for areas where a softer, warmer light is desired, such as a bedroom or living room, using warm white or soft white bulbs can create a cozy and inviting atmosphere.In addition to these practical tips, it's also important to consider the layout and design of a space when preventing lighting problems. For example, arranging furniture in a way that allows for easy access to natural light can help to maximize its benefits. In my own home,I've made sure to keep bulky furniture away from windows to ensure that the natural light can reach all areas of the room.中文：为了预防采光问题，有几件事可以做。
风险审核改善行动计划corrective actions for Risk findings
1) Fire pump system as a infrastructure of the building, the service is provided by our China partner Great Wall, and they contract the service to the professional and qualified fire maintenance company, the frequency and method of fire pump testing is based on national regulation (see attached);
1) After consulting with ourChinapartner Great Wall, they consider that they have followed the national fire related regulation to test the Generator, the test record have been kept by Great Wall.
moment it was not clear if the lightening
protection system is tested/audited on yearly
basis by the building management.
Advice No.1
It is recommended to that the lightening
1) A freestanding smoke detector with battery (see attached sample) will be installed in the void space between roof and false ceiling. If cable raises smoke in case of fire, it will trigger the freestanding smoke detector to alarm and security control center will be informed to come to the scene to take immediate reaction.
Vishay 薄膜电容器 焊接指南说明书
V I S H AY I N T E R T E C H N O L O G Y, I N C.Film CapacitorsSoldering Guidelines for Film CapacitorsA P P L I C A T I O N N Vishay recommends that users observe the following guidelines for soldering our film capacitors. Adherence to these recommendations will help to safeguard product specifications and reliability while preventing damage to the capacitors during soldering.Reflow soldering process should not be attempted on leaded film capacitors.SOLDERING GUIDELINES AND RECOMMENDED WAVE SOLDERING PROFILEWith regard to the resistance to soldering heat and the solderability, our products comply with “IEC 60384-1” and the additional type specifications.The recommended wave soldering profile for our leaded components is defined as follows:260T preheat T p T max.T p : Peak temperature of the component body (top)T max.: Maximum application temperature of the componentSoldering Guidelines for Film CapacitorsA P P L I C A T I O N N The PSL (Process Sensitivity Level) is classified according JEDEC standard J-STD-075 “Classification of Non-IC Electronic Components for Assembly Processes” and summarized in following tables per product family and pitch size of the component:RADIAL POLYESTER TYPESFAMILY PRODUCT PITCH SIZE5 mm7.5 mm10 mm 15 mm 22.5 mm 27.5 mm37.5 mm52.5 mmMKT 303W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 365W4Y (1)(3)MKT 366W4Y (1)(3)MKT 367W4Y (1)(3)MKT 368W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 369W4C (2)(4)MKT 370W4Y (1)(3)MKT 371W4Y (1)(3)MKT 372W4C (2)(4)MKT 373W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 373M W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 468W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 470W4Y (1)(3)MKT 1817W4Y (1)(3)MKT 1818W4Y (1)(3)MKT 1820W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)MKT 1822W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)F1772W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)Notes(1)Risk for parameter change if PSL is not strictly followed (2)C: the component has a preheat limitation of 150 °C(3)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 125 °CDuring soldering: T p ≤ 135 °C, t p ≤ 30 s, t ≤ 50 s(4)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 125 °CDuring soldering: T p ≤ 135 °C, t p ≤ 30 s, t ≤ 60 sSoldering Guidelines for Film CapacitorsA P P L I C A T I O N N RADIAL POLYPROPYLENE TYPESFAMILY PRODUCT PITCH SIZE5 mm7.5 mm10 mm15 mm 22.5 mm 27.5 mm 37.5 mm52.5 mmMKP 375W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 376W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 378W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 379W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 380W4Y (2)(3)MMKP 383W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 385W4Y (2)(3)W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 416 / MKP 417 / MKP 418 / MKP 419 / MKP 420W4Y (2)(3)W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 422W4Y (2)(4)W4Y (1)(4)MKP 336 1W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 336 2W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 336 6 W4Y (1)(4)W4C (5)(6)MKP 338 1W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 338 2W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 338 4W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 338 6W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 339W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)F339M W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 479W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)F1710W4C (5)(6)W4C (5)(6)W4C (5)(6)F1778W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)KP1830W4Y (2)(3)MKP 1837W4Y (2)(3)MKP 1840 / MKP 1840M W4Y (2)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 1841 / MKP 1841MW4Y (1)(3)W4Y (1)(4)W4Y (1)(4)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 1848 / MKP 1848C / MKP 1848S / MKP 1848H / MKP 1848Se W4C (5)(6)W4C (5)(6)W4C (5)(6)F339X2W4C (5)(6)W4C (5)(6)W4C (5)(6)F340X1W4C (5)(6)W4C (5)(6)W4C (5)(6)F340X2W4C (5)(6)W4C (5)(6)W4C (5)(6)F340Y2W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 385eW4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)W4C (5)(6)MKP 1847 / MKP 1847H / MKP 1847C W4C (5)(6)W4C (5)(6)W4C (5)(6)Notes(1)Risk for parameter change if PSL is not strictly followed (2)Risk for product damage if PSL is not strictly followed(3)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 100 °CDuring soldering: T p ≤ 110 °C, t p ≤ 20 s, t ≤ 30 s (4) Y: temperature is measured at the body top and must be kept as follows:During preheating: T max. ≤ 110 °CDuring soldering: T p ≤ 120 °C, t p ≤ 20 s, t ≤ 30 s(5)C: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 110 °CDuring soldering: T p ≤ 120 °C, t p ≤ 20 s, t ≤ 60 s(6) C: the component has a preheat limitation of 150 °CSoldering Guidelines for Film CapacitorsA P P L I C A T I O N N WARNINGSExcessive soldering heat (preheating or soldering above the recommended limits) can result in product damage and malfunctioning and should be thus strictly avoided. If PSL limits have been exceeded at any point in time during the soldering process, the products could possibly show a change in certain parameters (e.g. capacitance value, tan δ, insulation resistance, breakdown level, etc.). Exceeding PSL limits can even result in destruction of the product. Warning signs include a bulged or deformed product encapsulation. Such an appearance may also be the result of other causes, such as interruptions, cooling malfunctioning of the soldering machine, etc.Axial components can better protected from direct heat conducted by the PCB, when a distance is kept from the product to the PCB as follows:AXIAL POLYESTER TYPESFAMILY PRODUCT BODY LENGTH11 mm 14 mm 19 mm 26.5 mm 31.5 mm 41.5 mm MKT 1813W4Y (1)(3)W4Y (1)(3)W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)F1773W4C (2)(4)W4C (2)(4)W4C (2)(4)W4C (2)(4)Notes(1)Risk for product damage if PSL is not strictly followed (2)C: The component has a preheat limitation of 150 °C(3)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 125 °CDuring soldering: T p ≤ 135 °C, t p ≤ 30 s, t ≤ 50 s(4)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 125 °CDuring soldering: T p ≤ 135 °C, t p ≤ 30 s, t ≤ 60 sAXIAL POLYPROPYLENE TYPESFAMILYPRODUCT BODY LENGTH11 mm 14 (17) mm 19 (22) mm 26.5 (29) mm 31.5 (34) mm 41.5 (44) mm MKP 1839 / MKP 1839 HQ W4Y (3)(4)W4Y (3)(4)W4Y (3)(5)W4Y (2)(5)W4Y (1)(5)W4Y (1)(5)MKP 1845W4Y (3)(4)W4Y (3)(5)W4Y (2)(5)W4Y (1)(5)W4Y (1)(5)Notes(1)No risk(2)Risk for parameter change if PSL is not strictly followed (3)Risk for product damage if PSL is not strictly followed(4)Y: Temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 100 °CDuring soldering: T p ≤ 110 °C, t p ≤ 20 s, t ≤ 30 s (5) Y: Temperature is measured at the body top and must be kept as follows:During preheating: T max. ≤ 110 °CDuring soldering: T p ≤ 120 °C, t p ≤ 20 s, t ≤ 30 sSoldering Guidelines for Film CapacitorsA P P L I C A T I O N N Due to the sensitivity of these electromechanical components, it is critical to solder these components in a wave soldering method. We recommend to use manual soldering, see below.SOLDERING CONDITIONS FOR MANUAL SOLDERINGe a soldering iron with sufficient wattage and a regulated temperature. The adequacy of the soldering iron can be judged by the amount of time needed to reflow the solder. Beginning at 650 °F (343 °C), adjust the temperature so that the solder reflows within 1.5 s to 3 s.-If the solder reflow occurs in less than 1 s to 1.5 s, this indicates that the tip temperature is excessive.-If more than 3 s to 3.5 s are needed for solder reflow, either the tip temperature is insufficient or the tip is cooling down when applied to the circuit board.2.Apply a small amount of flux to the component termination and the pad layout.3.After tinning the iron, place the iron tip on the circuit pad at the edge furthest from the component. The soldering should be completed in 1.5 s to 3 s. If it is necessary to keep the iron on longer than 3 s, replace the component with a fresh device.4.Add the solder at the solder tip to ensure that it flows from the pad to the termination of the component. Be careful not to add too much solder. The minimum is the best.5.Never touch the component being worked on or any adjacent components with the soldering iron.TRIMMER CAPACITORSFAMILY PRODUCT BODY LENGTHALL SIZES 808 / 809W4Y (1)(2)Notes(1)Risk for product damage if PSL is not strictly followed(2)Y: temperature is measured at the body top and must be kept as follows: During preheating: T max. ≤ 85 °CDuring soldering: T p ≤ 100 °C, t p ≤ 20 s, t ≤ 30 s。
怎样阻挡鼾声英语作文
怎样阻挡鼾声英语作文Title: How to Prevent Snoring。
Introduction:Snoring can be disruptive not only to the person snoring but also to those around them. Fortunately, there are several strategies to help prevent snoring and promote better sleep quality for everyone involved.Understanding the Causes:Before diving into prevention methods, it's essential to understand why snoring occurs. Snoring typically happens when the airway narrows or becomes partially blocked during sleep, causing vibrations in the throat tissues. Factors such as obesity, nasal congestion, alcohol consumption, and sleep position can contribute to snoring.Prevention Methods:1. Maintain a Healthy Weight:Excess weight, especially around the neck, can put pressure on the airway, leading to snoring. Engaging in regular exercise and adopting a healthy diet can helpreduce snoring by promoting weight loss.2. Avoid Alcohol and Sedatives Before Bed:Alcohol and sedatives relax the muscles in the throat, increasing the likelihood of airway obstruction and snoring. Avoiding these substances before bedtime can significantly reduce snoring episodes.3. Sleep on Your Side:Sleeping on your back can cause the tongue and soft palate to collapse to the back of the throat, obstructing the airway and resulting in snoring. Sleeping on your side can help keep the airway open and reduce snoring intensity.4. Elevate Your Head:Using an extra pillow or elevating the head of your bed by a few inches can help alleviate snoring, especially ifit's caused by nasal congestion or mild sleep apnea. This position can prevent the tongue and throat tissues from collapsing into the airway.5. Treat Nasal Congestion:Nasal congestion, whether due to allergies, colds, or sinus infections, can contribute to snoring. Using saline nasal sprays, decongestants, or nasal strips can help clear the nasal passages, reducing snoring.6. Stay Hydrated:Dehydration can make nasal secretions thicker, leading to nasal congestion and potentially worsening snoring. Drinking plenty of water throughout the day can help keep the nasal passages moist and reduce snoring.7. Use Mandibular Advancement Devices (MADs):MADs are dental appliances that help prevent snoring by holding the lower jaw and tongue forward during sleep, thereby keeping the airway open. These devices areavailable over-the-counter or through prescription and can be effective for mild to moderate snoring.8. Consider Continuous Positive Airway Pressure (CPAP) Therapy:For individuals with moderate to severe sleep apnea, CPAP therapy can be highly effective in preventing snoring and improving sleep quality. CPAP machines deliver a constant stream of air through a mask worn over the nose or nose and mouth, keeping the airway open during sleep.Conclusion:Snoring can be disruptive and detrimental to both the snorer and their sleep partners. By implementing lifestyle changes, using devices, and addressing underlying medicalconditions, it's possible to reduce or eliminate snoring and enjoy better sleep quality for all. Remember to consult with a healthcare professional if snoring persists or is accompanied by other symptoms of sleep disorders.。
克服聚光灯效应的方法
克服聚光灯效应的方法英文回答：Overcoming the spotlight effect can be challenging, but there are several strategies that can help. First and foremost, it's important to recognize that people are generally more focused on themselves than on others. This means that the attention we believe we are receiving is often exaggerated in our own minds. One way to overcomethis is to remind ourselves that people are usually too preoccupied with their own lives to pay close attention to our every move. For example, if I feel self-conscious about a small stain on my shirt, I can remind myself that most people are too busy with their own thoughts and concerns to notice it.Another effective strategy is to challenge our negative self-perceptions by seeking feedback from others. We often assume that people are judging us harshly, but in reality, they may have a much more positive view of us. By askingfor feedback or seeking validation from trusted friends or colleagues, we can gain a more accurate understanding of how others perceive us. For instance, if I feel insecure about my public speaking skills, I can ask a friend who has seen me speak for their honest opinion. Their positive feedback may help to alleviate my self-doubt.Additionally, practicing self-compassion can be instrumental in overcoming the spotlight effect. Instead of being overly critical of ourselves, we can learn to treat ourselves with kindness and understanding. This involves acknowledging our imperfections and embracing them as part of being human. For example, if I make a mistake at work, instead of berating myself, I can remind myself that everyone makes mistakes and focus on learning from the experience.Furthermore, shifting our focus away from ourselves and onto others can also help to diminish the spotlight effect. By actively engaging in conversations and showing genuine interest in others, we can redirect our attention away from our own perceived flaws. This not only helps to alleviateself-consciousness but also fosters stronger connectionswith others. For instance, if I find myself feeling self-conscious at a social gathering, I can make an effort toask others about their interests and actively listen totheir responses.In conclusion, overcoming the spotlight effect requires a combination of strategies such as recognizing that people are generally more focused on themselves, seeking feedback from others, practicing self-compassion, and shifting our focus onto others. By implementing these strategies, we can reduce self-consciousness and develop a more balanced perspective of ourselves.中文回答：克服聚光灯效应可能是具有挑战性的，但有几种策略可以帮助我们应对。
怎样阻止飓风英文作文
怎样阻止飓风英文作文英文：As a meteorologist, I know that preventing hurricanesis impossible. However, there are measures that can betaken to minimize their impact. Here are some ways to do so:1. Early warning systems: By monitoring weather patterns, we can predict when a hurricane is likely tooccur and issue warnings to people in the affected area. This gives them time to prepare and evacuate if necessary.2. Building codes: Buildings in hurricane-prone areas should be constructed to withstand strong winds and heavy rains. This includes using reinforced concrete, hurricane shutters, and impact-resistant windows.3. Tree trimming: Trees near buildings and power lines should be trimmed regularly to prevent them from fallingand causing damage during a hurricane.4. Coastal restoration: Restoring wetlands and other natural barriers can help absorb the impact of a hurricane and reduce flooding.5. Education: Educating people about the dangers of hurricanes and how to prepare for them can save lives. This includes having an emergency kit, knowing evacuation routes, and having a plan in place for pets and other animals.While we cannot stop hurricanes from occurring, we can take steps to minimize their impact and keep people safe.中文：作为一名气象学家，我知道阻止飓风是不可能的。
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In addition to water-based fluxes or some special fluxes, most of the solvents used in fluxes are mainly alcohols, mainly methanol, ethanol and isopropanol, because of the toxicity of methanol, The relative instability in the flux, the use of methanol alone as a single solvent is less, so there are more plants using ethanol, isopropanol or a mixture of isopropyl alcohol and methanol. Alcohols are inherently flammable and explosive. The flash points of the three alcohols are similar, all at 11-12 °C, and the vapor pressures are: 13.33 kPa / 21.2 °C for methanol and 5.33 kPa / 19 for ethanol. °C, isopropanol was 4.40 kPa / 20 °C, it can be seen that under the same operating environment, methanol has strong flammability, followed by ethanol, weak isopropanol. In the flux ratio, by adding a flame retardant, the flash point of the flux can be increased by about 20.8 °C, and a flame retardant is added, which is less likely to be flammable than a product without a flame retardant.
The temperature curve is set. There are two main parameters for the wave soldering effect on the temperature curve: the chain speed and the temperature setting of each temperature zone. Setting the temperature curve requires a combination of the chain speed and the temperature of each temperature zone, depending on the technical requirements of the solder paste used. The chain speed should be determined according to the production cycle of the entire production line. The temperature curve is usually divided into four zones: preheating zone, heat preservation zone, welding zone and cooling zone. The heating rate should be less than 3 °C / S, the value temperature should be 210 °C ~ 230 °C, the reflux time above 183 °C should be 60 (±15) S, the cooling rate should be 3 °C / S ~ 4 °C / S, As a result, faster cooling rates result in finer grain structures and higher strength and brighter solder joints. However, exceeding 4 °C per second can cause temperature shocks.。