Space-time interest points

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Space exploration 太空探索的花销是否合理英语作文

Space exploration requires vast sums of money. Is the amount of money spent on space research justifiable？Could the money be better spent？Model Essay 1What is your viewpoint on this issue? Give reasons for your answer. You should write at least 250 words.Model Essay 1:We all know that there is no perfect country in this world of ours. People face death through starvation every day due to the lack of money to buy food and other necessities, such as medication. Sometimes, there is a scarcity of these resources even if money is available. Inmy view, it is wrong for governments to spend enormous funds on their space exploration and astrophysics programs when there are poor people who are hungry and sick in their various countries.I believe that governments should make it a priority to spend money on providing the basic needs of people here on Earth before they use it for research towards exploring other planets. First of all, regardless of what country they may happen to live in - all people require food, clean water/sanitation, shelter and medication to protect themselves from viruses and bacterialinfections. Apart from these most basic and fundamental requirements, people also need a good education so that they can find stable jobs in order to support themselves and their families. Instead of allocating additional funding for space exploration, governments should realise the importance of maintaining a healthy populace. For example, the USA has spent more than 23 billion dollars in the last 30 years on research, rather than spending it on the basic needs of its citizens.Moreover, in America, there are over 6 million homeless people and more than 2 million otherswho have lost their houses because of foreclosure. Also, there are more than 5 million people who are HIV-positive and in need of treatment. If the U.S. Government would decide to spend an equal amount of money on medical research as it does on its space program, then scientists might be able to find better treatments for this devastating disease so that many lives could be saved.Secondly, many people in Africa have a lack of food, clean water and electricity. I believe that we have a moral and ethical duty to help Africa and other poor countries around the world. It isworthier to help those who share our own planet before we travel to the moon. As for myself, I did my pharmacy internship in Egypt, where I witnessed many examples of why it would be wise for the government to spend more money in the area of medical / pharmaceutical research. Many people there face pain and death every day because of the Hepatitis C Virus. This insidious virus is responsible for causing the deaths of more than 1 million people in Africa each year. The cost of medication to treat it is very high -- approximately 20,000 dollars per patient. On the other hand, Egypt has spent more than 200 million dollars on spaceexploration and researching other planets. I think that it would have been a much smarter choice for them to have used the money to provide medication for those who could not afford it.In summary, it is my viewpoint that governments should concentrate on solving their own internal problems by offering their citizens the basic requirements of life such as food, clean water/sanitation, shelter and medication. They should use any excess money for improving the lives of their inhabitants by providing them with educational opportunities sothat they can find decent jobs in order to become independent. It is important to fund academic pursuits such as space exploration and research in the field of Astrophysics, of course, but not at the expense of the lives of human beings who live on this planet.Model Answer 2:There has always been considerable discussion and debate about whether governments in many countries should spend taxpayers’ money on space research. In my view, it is impossible to justify the amount of money spent on space research. Generally speaking, the main reasonfor this position is that there are several areas in which the money could be invested better. When we have so many problems and hungry people in the Earth, spending money on space is not a good choice at all.The first point to make is that governments have a responsibility to spend public money on projects that bring a benefit to the citizens. This has not been the case with space research as most developments have been limited to helping astronauts in space or have been very specialised. For example, it is not of great value to the general public that we now have pens andbiros that can write upside down. This does not merit the huge amount of money spent. Little success has been made so far on space exploration except landing on the Moon or knowing that Mars had once been a place for living being. What good that can bring to people who are starving in many countries?The second point to make is that there are many much more urgent projects on Earth that require investment. If governments spent less money on space research, then they would be able to help solve some of these problems such as population control, elimination of diseaseslike cholera, global warming and food shortages. It seems to me that all of these issues are more important because they affect the lives of millions of ordinary people. An illustration of this is that the US government could provide food for all the starving people in the world if they did not spend so much on NASA.My conclusion is that politicians should not fund space research. The grounds for saying this are that it is very costly and provides little real benefits. Furthermore, there are several more urgent issues that need to be funded.。

莱埃尔电子有限公司产品说明：拉瓦雷特时间间隔计数器说明书

LAUREL ELECTRONICS, INC.Laureate™ Time Interval Meter Resolution to 0.2 µs for time of periodic events. Displays highly accurate rate based on 1 / time.Features•Times periodic events with width from 1 µs to 199.999 s•Display resolution to 0.2 µs•Rep rates to 250 kHz•Inputs from NPN or PNP proximity switches, contact closures, digital logic,magnetic pickups down to 12 mV, or AC inputs up to 250 Vac•Triggers on positive or negative pulse edges•Universal AC power, 85-264 Vac•Isolated 5, 10 or 24 Vdc excitation supply to power sensors•NEMA 4X, 1/8 DIN case•Optional serial I/O: Ethernet, USB, RS232, RS485, Ethernet-to-RS485 converter•Optional relay outputs: dual or quad relays, contact or solid state•Optional isolated analog output: 4-20 mA, 0-20 mA, 0-10V, -10 to +10V•Optional low voltage power: 10-48 Vdc or 12-32 Vac•Optional Extended Timer: features of standard timer plus rate based on 1/time DescriptionThe Laureate A-to-B Time Interval Meter can display pulsewidth or time delay between individual pulses to a resolution of0.2 µs. It can also display average pulse width or average timedelay between multiple pulses.Time interval is measured between inputs on channels A andB. Timing starts when a pulse is applied to Channel A (selectablepositive or negative edge), and ends when a pulse is applied toChannel B (selectable positive or negative edge). In case of asingle pulsed signal, the A and B inputs can be tied together. Apositive or negative slope may be selected to start timing, andthe opposite slope must be selected to stop timing. Timing isachieved by counting 5.5 MHz clock pulses. Multiple integral timeintervals are averaged over a gate time which is selectable from10 ms to 199.99 s and also controls the display update time.Time interval can be displayed in seconds, milliseconds, ormicroseconds with 6-digit resolution. In the typical application,time is displayed in milliseconds with 1 µs resolution. For timesless than 100 ms, display resolution down to 0.2 µs can beachieved by applying a multiplier of 10, moving the decimal pointby one position, and averaging many time intervals.Highly accurate rate can be displayed by taking the inverse oftime. Extensive arithmetic capabilities allow display inengineering units, such as meters/sec. Rate based on timerequires use of the Extended counter main board.The FR dual-channel signal conditioner board accepts inputsfrom proximity switches with PNP or NPN output, TTL or CMOSlogic, magnetic pickups, contact closures, and other signals from12 mV to 250 Vac. Jumper selections provide optimum operationfor different sensor types and noise conditions. A built-in isolated5, 10, or 24 Vdc excitation supply can power proximity switchesand other sensors, and eliminate the need for an external powersupply.Designed for system use. Optional plug-in boards includeEthernet and other serial communication boards, dual or quadrelay boards, and an isolated analog output board. Laureatesmay be powered from 85-264 Vac or optionally from 12-32 Vacor 10-48 Vdc. The display is available with red or green LEDs.The 1/8 DIN case meets NEMA 4X (IP65) specifications from thefront when panel mounted. Any setup functions and front panelkeys can be locked out for simplified usage and security. A built-in isolated 5, 10, or 24 Vdc excitation supply can power trans-ducers and eliminate the need for an external power supply.All power and signal connections are via UL / VDE / CSA ratedscrew clamp plugs.SpecificationsDisplayReadoutRangeIndicators6 LED digits, 7-segment, 14.2 mm (.56"), red or green-999999 to +999999Four LED lampsInputsTypes Grounding Minimum Signal Maximum Signal Noise Filter Contact Debounce AC, pulses from NPN, PNP transistors, contact closures, magnetic pickups. Common ground for channels A & BNine ranges from (-12 to +12 mV) to (+1.25 to +2.1V).250 Vac1 MHz, 30 kHz, 250 Hz (selectable)0, 3, 50 ms (selectable)Time Interval ModeTiming StartTiming StopPeriodic Timing Interval Gate TimeTime Before Zero Output Channel A pulse, + or - edges Channel B pulse, + or - edgesGate time + 30 ms + 0-2 time intervals Selectable 10 ms to 199.99 s Selectable 10 ms to 199.99 sResolution0 - 199.999 s 0 - 99.9999 s 0 - 9.99999 s 0 - .999999 s 0 - .099999 s 1 ms 100µs 10 µs 1 µs 0.2 µsAccuracyTime Base Span Tempco Long-term Drift Crystal calibrated to ±2 ppm ±1 ppm/°C (typ)±5 ppm/yearPowerVoltage, standard Voltage, optional Power frequency Power consumption (typical, base meter) Power isolation 85-264 Vac or 90-300 Vdc12-32 Vac or 10-48 VdcDC or 47-63 Hz1.2W @ 120 Vac, 1.5W @ 240 Vac, 1.3W @ 10 Vdc, 1.4W @ 20 Vdc, 1.55W @ 30 Vdc, 1.8W @ 40 Vdc,2.15W @ 48 Vdc250V rms working, 2.3 kV rms per 1 min testExcitation Output (standard)5 Vdc10 Vdc24 VdcOutput Isolation 5 Vdc ± 5%, 100 mA 10 Vdc ± 5%, 120 mA 24 Vdc ± 5%, 50 mA 50 Vdc to meter groundAnalog Output (optional)Output Levels Current compliance Voltage compliance Scaling Resolution Isolation 4-20 mA, 0-20 mA, 0-10V, -10 to +10V (single-output option) 4-20 mA, 0-20 mA, 0-10V (dual-output option)2 mA at 10V ( > 5 kΩ load)12V at 20 mA ( < 600Ω load)Zero and full scale adjustable from -99999 to +9999916 bits (0.0015% of full scale)250V rms working, 2.3 kV rms per 1 min test(dual analog outputs share the same ground)Relay Outputs (optional)Relay Types Current Ratings Output common Isolation 2 Form C contact relays or 4 Form A contact relays (NO)2 or 4 Form A, AC/DC solid state relays (NO)8A at 250 Vac or 24 Vdc for contact relays120 mA at 140 Vac or 180 Vdc for solid state relays Isolated commons for dual relays or each pair of quad relays 250V rms working, 2.3 kV rms per 1 min testSerial Data I/O (optional)Board SelectionsProtocols Data RatesDigital Addresses Isolation Ethernet, Ethernet-to-RS485 server, USB, USB-to-RS485 server, RS485 (dual RJ11), RS485 Modbus (dual RJ45), RS232 Modbus RTU, Modbus ASCII, Laurel ASCII protocol 300 to 19200 baud247 (Modbus), 31 (Laurel ASCII),250V rms working, 2.3 kV rms per 1 min testEnvironmental Operating Temperature Storage Temperature Relative Humidity Protection0°C to 55°C -40°C to 85°C95% at 40°C, non-condensingNEMA-4X (IP-65) when panel mountedElectrical ConnectionsMechanicalApplication ExamplesTime Interval Mode for Time DelayFor periodic pulses applied to A and B channels, time delays can be measured down to 0.2 µs resolution from the rising or falling edge of A to the rising or falling edge of B (selectable). Time Interval Mode for Pulse WidthThe width of periodic pulses (t1 or t2) can be measured by tying the A and B channels together. As for time delay, readings are averaged over a user-selectable gate time. Timing Process DynamicsThe start and stop pulses used for timing can be generated by the dual relay board in a Laureate panel meter or digital counter. For instance, the start and stop pulse edges can be created as temperature passes two alarm setpoints, or temperature cycles in a hysteresis control mode. Rate Based on 1 / TimeThe start and stop pulses used for timing can be generated by the dual relay board in a Laureate panel meter or digital counter. For instance, the start and stop pulse edges can be created as temperature passes two alarm setpoints, or temperature cycles in a hysteresis control mode.Replacing an Oscilloscope with a Laureate Time Interval MeterAn oscilloscope is great for viewing and timing pulses in a lab. However, in fixed installations where digital timing accuracy and control outputs are required, a low-cost Laureate time interval meter will be the instrument of choice. Resolution to 0.2 µs is feasible.Instrumenting a Pulsed Laser SystemSome of the many possibilities in instrumenting a pulsed laser system with Laureate dual-channelcounters: elapsed time, number of pulses, pulse width, pulse separation, duty cycle, and pulse rep rate.Ordering GuideCreate a model number in this format: L50000FR, IPCMain Board L5 Standard Main Board, Green LEDsL6 Standard Main Board, Red LEDsL7 Extended Main Board, Green LEDsL8 Extended Main Board, Red LEDsNote: Use of the Extended Main Board makes this counter also suitable for A-B time interval,frequency, rate, period, square root of rate, up or down total, arithmetic functions, simultaneousrate and total, phase, duty cycle, batching, and custom curve linearization.Power0 Isolated 85-264 Vac1 Isolated 12-32 Vac or 10-48 VdcRelay Output (isolated) 0 None1 Two 8A Contact Relays2 Two 120 mA Solid State Relays3 Four 8A Contact Relays4 Four 120 mA Solid State RelaysAnalog Output (isolated) 0 None1 Single isolated 4-20 mA, 0-20 mA, 0-10V, -10 to +10V2 Dual isolated 4-20 mA, 0-20 mA, 0-10VDigital Interface (isolated) 0 None1 RS2322 RS485 (dual RJ11 connectors)4 RS485 Modbus (dual RJ45 connectors)5 USB6 USB-to-RS485 converter7 Ethernet8 Ethernet-to-RS485 converterInput Type FR Dual-Channel Pulse Input Signal ConditionerAdd-on Options CBL01RJ11-to-DB9 cable. RJ11 to DB9. Connects RS232 ports of meter and PC.CBL02USB-to-DB9 adapter cable. Combination of CBL02 and CBL01 connects meter RS232port to PC USB port.CBL03-16-wire data cable, RJ11 to RJ11, 1 ft. Used to daisy chain meters via RS485.CBL03-76-wire data cable, RJ11 to RJ11, 7 ft. Used to daisy chain meters via RS485.CBL05USB cable, A-B. Connects USB ports of meter and PC.CBL06USB to RS485 adapter cable, half duplex, RJ11 to USB. Connects meter RS485 portto PC USB port.CASE1Benchtop laboratory case for one 1/8 DIN meterCASE2Benchtop laboratory case for two 1/8 DIN metersIPC Splash-proof coverBOX1NEMA-4 EnclosureBOX2NEMA-4 enclosure plus IPCBL Blank Lens without button padsNL Meter lens without button pads or Laurel logo。

对比尔盖茨的评价英文

对比尔盖茨的评价英文对比尔盖茨的评价英文----WORD文档，下载后可编辑修改----下面是小编收集整理的范本，欢迎您借鉴参考阅读和下载，侵删。

您的努力学习是为了更美好的未来！对比尔盖茨的评价英文篇一Bill Gates biography, a record of great people legendary experience of the book, is really worth seeing, a computer genius, a studious but not abide by the rules of the game characters, a dare to dare, consciousness ahead of the guy, one to one To help the elite can be united in one, to the hearts of the Microsoft Empire dominated the world occupation of the high-end market business leaders, a successful business owners, one of the world's richest but most generous people, this is my mind For Bill Gates, the world's richest man's impression.Bill Gates was born in a family of lawyers and teachers, so childhood was a very good education, his partners are very admire his childhood talent and the wisdom of speaking, they say Bill Gates as an adult people. Bill Gates was so interested in computers that he later decided to set up a company with his friend Paul.The turning point of his life is after graduating from primary school, came to Seattle private school Lakeside Middle School, of course, Lakeside high school, tuition is very expensive, $ 5,000 per semester, the school also attaches great importance to students with special abilities to encourage students to develop their hobbies and interests, The school is only 300 students, but this school is the first computer school courses in the United States, when the United States committed to the spacecraft on the moon, the community there is a surge in technology,Lakeside Middle School was the first to make wise decisions to introduce computer. It is this decision that has made this development in society now. Bill Gatesin the lake middle school shows his talent with the computer, although the class will doze, usually do not have top-notch academic, but this does not stop him to explore the mysteries of the computer, where he laid the foundation for aspirations to the world, also led to Microsoft The ultimate birth of the empire. After graduating from high school, entered the Harvard legal profession, but not interested in it, still a soft spot for the computer, and dissatisfaction with the Harvard system, two years later, with the support of friends, he fired the Harvard squid.Bill Gates succeeded in persuading his father and mother, and in the United States more desolate New Mexico established the Microsoft Corporation. Here, they have compiled a microcomputer with the real useless BASIC software. BASIC software has brought a lot of wealth to Microsoft, but the software industry is a fast-growing industry, Microsoft has gradually fallen behind, at this time, Bill and his team did not flinch, they moved the company to the research environment Good Seattle. In 1980, Microsoft was the largest computer hardware company IBM's praise, and IBM's cooperation, so that Microsoft's rapid, defeated Apple. Later, Microsoft also developed WINDOWS Windows and the Internet, Bill became the software market emperor. Microsoft's revenue in 2007 reached 51.12 billion US dollars, Bill changed the world, has become synonymous with the world's richest man.Gates can become a software overlord, smart is not the first, he did not want to put the second ambition is the real driving force for success, imagine there is such domineering, the worldwho can compete with it?A good business unit, is everyone wants to enter, because it can give you is a rich salary of materials, to give you a better life protection.But all the material is accumulated and created by the predecessors, you do not haveGates's "Ten Principles of Good Employee", Bill Gates answered us with his experience. First of all, you must love the enterprise, andself-enterprise products of interest, if even its people are not interested, you expect your products will produce a sensation in the market? Only you actively love it, you can find it Advantages, keep the missionary-like enthusiasm to promote your product, impress your customers, you can find it's shortcomings, you can make improvements to the views of the relevant departments, so that products will continue to improve, enterprises willMore thriving!In the book also illustrates the importance of responsibility. "People can not great, but not without responsibility", a responsible staff can be regarded as truly excellent staff!Bill Gates is the world's richest man, is a well-known legendary figure, his success has attracted worldwide attention, as teen idols. Bill Gates is not only of concern to his wealth, more importantly, his achievements in the cause of his legendary entrepreneurial experience and process. The author from the success of the perspective of the analysis of Bill Gates's success, the introduction of 11 guidelines to guide us to learn, to think. In this book is to succeed in the end, there are many incisive expositions and aphorisms, aphorisms, I learn from the following points:First, adhere to the only way to success."Success is a measure of the value of life ruler, it is the needfor human self-realization" Success is a state of life. So the success of all people to pursue and longing for the goal; However, to determine the goal is not easy, easy to achieve. Bill Gates also said, "fate is always full of elusive variables," to achieve the goal of success is a process, in this process to encounter frustrations and failures, to pay the price. So whether the difficulties and progress, and win the war, to determine the direction of Qierbushe, adhere to the established goal is an important part, there is no contract and do not insist in the end the spirit, easily halfway.Third, we must never insist on continuous progress."Winners are busy with hard work, never rely on the advent of luck," easy to meet, by luck to meet the desire is also one of the performance of the character of vulnerability. "Looking up at the ideal of self, not satisfied with the present self" "Success comes from the positive efforts, hard work and good at thinking" "by the desire and prayer is not enough, must be hands-on to achieve the ideal.For those tasted, Can not adhere to, adhere to, and then adhere to the attitude to complete their studies, to achieve the ideal of the young people, is inspiration is spur.Fourth, insist on success must restrict themselves.Success must start from the action, to choose their own do not give up the choice to do, and insist on seeking extraordinary from the ordinary, from small things, make a little money to start and so on, all of these arguments, such as: "Do not ignore the little things" "Do not want to get something for nothing" and so full of educating young people's philosophy.Everyone's success is not just standing in the spotlight smile when the brilliant so simple, it is through the back of the base of the drops of effort and sweat cast.1. Anti-piracy measures: bundled sales2. Maximize the potential of working in teams3. Do not fear failure, to correctly deal with failure, respect for failure, failure to be "cruel" analysis process.4. Work for successful people first, then with successful people, and finally let the successful people work for you.5. Through social relations to carry out business, which is attached importance to the development of a network of purposes.6. Start with hard work, master time, immediate action.7. Google browser competition in the use of the image of Google to。

基于粒子群算法优化最小二乘支持向量机在基坑施工过程中周围环境沉降预测研究

———————————————————————作者简介:任海龙（1989-），男，黑龙江齐齐哈尔人，本科，讲师，从事工程造价专业教学；张洁（通讯作者）（1989-），女，山东滨州人，硕士研究生，中级工程师，从事工程造价工作；马征（1991-），男，黑龙江鸡西人，助理工程师，硕士研究生，研究方向为岩土工程。

0引言由基坑施工引发周围环境的沉降是极为复杂且常见的现象，但基坑工程具有时间短、工序复杂、临空面暴露时间长的特点，这样会造成周围环境的沉降数据收集的时间少、样本数据不足等特性，因此，周围环境的沉降数据是一个小样本数据。

现有研究表明[1]基坑施工对周围环境沉降研究的方式、方法对观测数据依赖数据的依赖性较大，但现实情况往往不满足研究条件[2、3]，这就造成因预测精度不高导致的工程事故发生。

基于上述原因，如何在有限的样本数据中寻求内在规律对周围环境沉降量的快速、精准预测是十分必要的。

对现有研究总结发现[4、5]，LSSVM 模型在小样本数据的预测方面具有其优越性，但该模型对参数选择的依赖性较大，参数选择的优劣直接影响了该模型的预测精度[6、7]，因此，本文提出了由PSO （粒子群优化算法）优化LSSVM 模型（最小二乘支持向量机）参数选择的一种预测模型。

为了验证模型的可靠性，本文采用某市实测沉降量数据对比分析了PSO 算法，遗传算法等对预测精度进行定量分析。

1最小二乘支持向量机原理(LSSVM )训练数据的样本可以表示为，，。

其中x i 是输入向量，y i是目标值，在特征空间（R nf）中LSSVM 模型可表示为：（1）式中，ω∈R nf 为超平面的权值向量，φ（·）为非线性变换映射函数，将输入样本一维数据映射到高维特征空间（R n →R nf ）；b 为偏置量。

根据结构风险最小化原则，寻找ω和b 使（2）式最小化，即有：（2）式中，控制模型的复杂度，γ为误差惩罚因子，R emp 为误差控制函数。

expiration points gating

expiration points gatingExpiration Points Gating: Unlocking the Power of TimeIntroduction:Expiration points gating, also known as time gating, is a popular game design mechanic in which content or features are locked behind a time-based restriction. This technique has gained popularity in recent years due to its ability to create a sense of anticipation and urgency among players. In this article, we will explore the concept of expiration points gating, its benefits, drawbacks, and its impact on the gaming industry.What is Expiration Points Gating?Expiration points gating is a game design strategy in which players are required to wait for a certain amount of time before they can access new content or features in a game. This can be in the form of waiting for a cooldown period to expire, daily resets, or specific time-based events. It is a method employed by game developers to retain players and encourage them to log in regularly.Benefits of Expiration Points Gating:1. Player Engagement: Expiration points gating compels players toreturn to the game regularly, as they do not want to miss out on any valuable rewards or limited-time events. This creates a strong sense of engagement and investment in the game.2. Monetization Opportunities: The time restriction imposed by expiration points gating can be monetized through microtransactions. Players who do not want to wait can choose to pay to bypass the waiting period, providing developers with an additional revenue stream.3. Social Interaction: Time restrictions can be used to foster social interaction among players. By coordinating their schedules and activities, players can maximize the benefits of limited-time events or increase their chances of success.Drawbacks of Expiration Points Gating:1. Player Frustration: Expiration points gating can be frustrating for players who are unable to access content due to real-life commitments or time zone differences. This frustration can lead to player dissatisfaction and retention issues.2. Inequality Among Players: Players who have more time to spendon the game have a significant advantage over those who cannot invest as much time. This can create an imbalance among players and discourage casual gamers from continuing to play.3. Game Design Limitations: The implementation of expiration points gating may impact the design of other gameplay features. Developers may be forced to create additional content to fill the gaps in game progression, leading to a potential dilution of the overall gameplay experience.The Impact on the Gaming Industry:1. Evolution of Game Monetization: Expiration points gating has contributed to the evolution of game monetization models. Developers have moved away from traditional one-time purchases towards free-to-play with in-app purchases. This shift has allowed for continuous revenue generation and increased profitability.2. Changing Player Expectations: With the widespread use of expiration points gating in popular games, players have come to expect regular, time-restricted events and rewards. This has influenced game design across multiple genres and led to an emphasis on daily log-ins and engagement.3. Balance Between Engagement and Retention: Game developers must strike a balance between engaging players and retaining them. Excessive reliance on expiration points gating may lead to burnout or player fatigue, negatively impacting player retention in the long run.Conclusion:Expiration points gating is a game design technique that has both benefits and drawbacks. While it boosts player engagement, provides monetization opportunities, and encourages social interaction, it can also frustrate players, create inequalities, and limit game design flexibility. As the gaming industry continues to evolve, finding the right balance between engaging gameplay and respecting players' time will be crucial for sustainable success.。

2022-2023学年广东省揭阳市揭东区光正实验学校高三上学期第二次月考英语考试

2022-2023学年广东省揭阳市揭东区光正实验学校高三上学期第二次月考英语考试1. ASTRONAUT CAMP- FLORIDAHave you ever wanted to step into the shoes of an astronaut and experience rocket flight and cosmic(宇宙的)exploration? On this journey to Florida you will come as close as possible to this experience without actually traveling into space.Part 1-Visit the Planetarium(天文馆)From traditional star displays and cultural shows that detail the importance of astronomy around the world, to feature presentations that show the depths of outer space, the planetarium has something for curious stargazers of all ages.Part 2-Take Part in Mission SpaceWhat’s it like to be an astronaut? You’ll find out on Mission SPACE! Before you board,you’ll train for your mission on the X-2 Deep Space Shuttle at the International Space TrainingCenter(ISTC).Each member of your 4-cadet(学员)crew will assume an important role: navigator, pilot, commander or engineer.Part 3-Lunch with an AstronautThis 90-minute encounter at the Space Center in Cape features a buffet-style lunch along with a personalized presentation from one of celebrated astronauts. At the end of the event, there’s a brief question-and-answer session, plus time for family photos with the astronaut. Astronauts describe what it's like to live in space-eating, exercising, sleeping and training. No topic is off-limits.Part 4-Experience Rocket FlightEnter the Shuttle Launch Experience, and recreate the feeling of a space shot in real time, from the launch pad(发射台)to orbit. Adjust before six seconds, the main engines fire up, and as the speakers say“3, 2, 1….” the rocket launches.1. What does Mission Space include?A．Experiencing a space shot. B．Preparing for a space mission.C．Learning how to train your crew. D．Seeing the depth of outer space.2. In which part can you ask astronauts questions?A．At the Planetarium. B．On Mission SPACE.C．At Lunch with an Astronaut. D．In the Shuttle Launch Experience.3. What is the purpose of this journey?A．To show people modern star displays. B．To train people to be future astronautsC．To provide some knowledge of planetarium. D．To help people learn more about space travel.2. Tired of working in IT and staying the same in Australia, Paulo Cattaneo decided to make a change. In 2015 he started a strict budget so he could save up enough money to buy his dream KTM 1190 motorbike, a camera, and enough funds to support himself for a few years.Then he gave up his job, packed his things, and set off on an adventure, travelling the world on his motorbike. Paulo, 39, has spent the last four years biking through Australia, South America, North America, and Europe, riding up to 12 hours a day and spending his nights in his tent under the stars.“Australia for me was my first experience riding long distance and I was mind-blown by the beauty of the old continent.” Paulo wrote on his travel journal, “Traveling through Latin America, I explored the rainforest and learned Spanish and Portuguese. Mexico has some of the best food I ever had and Peru is an interesting place where I can enjoy the unique local Indian culture, also called Inca civilization.”Paulo has managed to keep his travels going by keeping his budget tight, so he hasn’t had to get a job for his travels. To keep costs low, he seldom looked for accommodation in hotels and went camping instead. Thankfully, the motorbike, which Paulo bought secondhand in Australia, has not required any major repairs since he set off. The journey isn’t always easy, but Paulo has never looked back.Sadly, the Covid-19 pandemic put a stop to his travels in Greece when he traveled around Europe, and Paulo has had to spend the last few months in Italy, his homeland. Once the world is back up and running, he plans to return to life on the road and explore Asia and Africa.1. What did Paulo begin to do in 2015?A．Change his job to live a better life.B．Collect enough money to buy a car.C．Travel the world on his motorbike.D．Prepare for his trip around the world.2. What is not mentioned in paragraph 2?A．The way to travel. B．The last destination of travel.C．The places he’d been to.D．The travel daily schedule of travel.3. What happened to him during Paulo’s trip?A．He enjoyed the best food in Peru.B．He got a job to support his travel.C．The motorbike often troubled him.D．The view in Australia attracted him.4. What can we learn from the last paragraph?A．Paulo was glad to return to his homeland.B．Paulo had to find accommodation in hotel.C．The Covid-19 couldn’t stop Paulo’s dream.D．Being alone was a challenge during Paulo’s trip .3. Human activity has shrunk (缩小) the size of wild animals worldwide, and yet recent research has found many mammals (哺乳动物) living near cities have gradually become larger, both in length and in weight. The findings are unexpected. Spreading urban environments can grow much hotter than natural habitats, and warmer temperatures usually benefit mammals that have a smaller, more energy-saving figure—a principle of biology known as Bergmann’s rule.As the world grows warmer, scientists have worried that mammals living near cities are going to grow smaller, possibly reducing their fitness and the fitness of their predators (捕食者). Even with climate change that might not happen. As it turns out, there is another factor affecting a mammal’s size that might exceed temperature, and that is food. In and around places with dense populations, where high-calorie human foods are more widely available and predators are fewer and farther in between, new research discovered that most of the mammal species studied appear to be growing in size, not shrinking. According to careful measurements of more than 100 species from North America, gathered from museum collections over the past 80 years, the main reason is not a city’s temperature. Instead, the greatest increases in weight and body length appear to lie among those mammals that live near humans, regardless of how hot their surroundings are.As climate change grows worse, there is, of course, the possibility that that might change, but at least for now, it seems wolves, deer, bats, and other mammals in North America could be affected more by city populations than city climates.If we want to protect mammals that exist today for the future, it’s important we kn ow how human civilization is influencing their size, behavior, and well-being. In a rapidly changing world, that knowledge could mean the difference between ongoing life and dying out.1. Why are the findings unexpected according to Paragraph 1?A．The temperature in cities is hotter than that in nature.B．Mammals around cities grow against Bergmann’s rule.C．The animals living in nature become bigger in size.D．The city temperature makes animals become smaller.2. What does the underlined word “dense” in Paragraph 2 mean?A．Large. B．Young. C．Working. D．Educated.3. Which of the following best supports the main idea of the text?A．Human activity has shrunk the size of wild animals.B．Climate matters most in determining the size of mammals.C．Mammals become larger with more food near cities.D．Living in hot surroundings shapes the size of mammals.4. What will the passage most probably talk about next?A．Human’s impact on the mammals’ development.B．Different ways to rescue the endangered city animals.C．How to help mammals adjust to the climate change.D．What healthy food can be given to city mammals.4. Researchers have long sought ways to design air conditioning systems that can work without such greenhouse gases as HFCS, but none has come close to being a direct replacement. A small Irish company, however, now states to have come up with an answer.Exergyn, based in Dublin, has been working on a 60kw prototype(原型机)which not only avoids HFCS, but also has the benefit of having few moving parts. The system uses a material called a shape-memory alloy(合金). SMAS, as they are known for short, have the unusual ability to return to a predetermined shape when heated. The SMAS produce heat when their shapes are changed by compression(压缩), and then absorb it when the pressure is gone and they return to their original shapes.Tony Ennis, Exergyn’s chairman, says this method of cooling is not only more environmentally friendly than an HFCS system, but will also be less expensive to buy and 30%～40% cheaper to run. It will be lighter and smaller, too. As for reliability, he says the prototype’s performance suggests the unit could operate for more than 40 years without a problem.When Dr. O’Toole, an expert in memory materials, cofounded Exergyn in 2012, his intention was to use the SMAS to create a system that would turn low grade waste heat into electricity. But the challenges presented by HFCS persuaded him that air conditioning would be a quicker way to bring the technology to market. Development is still continuing, but products may be only a few years away.He has not given up thoughts of producing electricity. He even wants to expand its application to other products, such as refrigerators and heat pumps to absorb heat from the ground for homeheat ing. When time allows, Dr. O’Toole and his colleagues hope to get to work on those ideas, too.1. What does the underlined word “predetermined” in paragraph 2 probably mean?A．Original. B．Different. C．Strange. D．Perfect.2. Exergyn’s air conditioner will be ________ than the HFCS system.A．more expensive B．more reliable C．bigger D．heavier3. Which product did Exergyn want to apply the SMAS to in 2012?A．Heat pumps. B．Air conditioning systems.C．Refrigerators. D．Waste-to-energy systems.4. Which of the following is a suitable title for the text?A．Challenges Presented by HFCSB．Potential Uses of Shape memory AlloysC．A NewHeat Pump With Few Moving PartsD．A New Air-conditioner Without Greenhouse Gases5. The 24 solar terms were created thousands of years ago in China to guide agricultural production. They also reflect China’s rich history through the seasonal festivals, special foods, cultural ceremonies, family gatherings and even healthy living tips that correspond with each solar term. 1Rain Water signals the increase in rainfall and rise in temperature. With its arrival, lively spring-like scenery starts blossoming: the river water defreezes, wild geese move from south to north and trees and grass turn green again.2 In northern China, the spring drought is common and the precipitation of this season accounts for only 10 to 15 percent of annual average rainfall. At this time of year, farmers begin to plough their fields. It’s the right time to prepare for spring sowing when the day gets warmer. 3During Rain Water period, extra care is needed to deal with a returning cold spell and humidity, which is the amount of water in the air. 4 It is strongly advised not to take off the thick coats too early and to keep warm, especially the elderly and children.The wet and humid weather during Rain Water period is considered harmful for people’s spleen and stomach according to Chinese medical practice. 5 People in Beijing often eat porridge (粥) cooked with a kind of Chinese herb medicine to resist cold and wet weather. Honey, dates and Chinese yam are also very good nourishment (营养) to put in the porridge6. Five years ago, when it was time for my cousin to start college, my 75-year-old grandfather, Rex, decided to do the same. He went to ______, taking classes twice a week until his death last summer.As a student, my grandfather spent countless hours in his office ______ and completing assignments. Although he was twice as ______ as his professors, he loved going. He said,“You can never ______ too much, no matter how old you are.” He loved everything about school. Learning new things was truly his passion.My grandfather’s will to learn was a great ______ for me to do my best in school. We were always ______ with each other, trying to bring home the better grade. When he turned 80 and still had a full head of hair, my grandfather even felt like he could take on the ______. He felt like he could beat the unstoppable no matter what came in his way---whether it was his continuing with cancer ______ a tough professor.Some people look to Superman or Batman as their ______, but my grandfather will forever be my hero, the ______ who always came to my rescue. My grandfather was made the hall of fame（名人堂） at his high school as one of the school’s most successful football players. When I did some research I _______that his nickname was Atlas. In Greek mythology（神话）, Atlas held the heavens on his shoulders. For my grandfather’s football team, he was ______ Atlas, holding the team together. He was my Atlas too, as the foundation of our family.In my times of need he was always there to ______ me and celebrate my success. I could count on him to help me out and stand by me. The strength he ______ with me will continue to hold me up asI forever keep his memory ______ in my heart and mind.1.A．college B．party C．hospital D．cinema2.A．teaching B．talking C．studying D．playing3.A．tall B．new C．thin D．old4.A．pay B．know C．think D．work5.A．example B．exercise C．method D．friend6.A．fighting B．working C．competing D．arguing7.A．world B．country C．city D．class8.A．and B．or C．so D．but9.A．grandfather B．student C．professor D．hero10.A．other B．only C．one D．same11.A．realized B．remembered C．discovered D．guessed12.A．my B．their C．his D．our13.A．surprise B．supply C．warm D．support14.A．enjoyed B．shared C．afforded D．kept15.A．alive B．awake C．alone D．asleep7. 阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。

ViewSonic PJD6383 短焦多imedia DLP 项目器说明说明书

ViewSonic’s PJD6383 multimedia DLP ® short-throw projector is ideal for education purposes showing images with high brightness and a defined resolution. It is compatible with the Crestron RoomView ® network management software that facilitates processes by acentralized monitor and allows management of multiple projectors monitoring over LAN or WLAN. DynamicEco ™ mode reduces power consumption and extends the projector’s lifespan where Dynamic Movie mode automatically adjusts the image brightness and contrast with the changing environments.Its exclusive technologies help teachers to provide a better teaching experience and save on total cost of ownership. Moreover, theprojector can be easily and efficiently managed by IT persons and is optimal for educational campuses or libraries. Versatile connectivity and an HDMI interface allow for connection with multimedia devices and increases content attractiveness for classrooms.Outstanding projection qualityWith its XGA resolution and 3,000 ANSI lumens, the PJD6383 delivers a sharp projection image and displays video contents with quality making it the first choice projector for the classroom.Planet-friendly DynamicEco ™ modeViewSonic’s exclusive DynamicEco™ mode reduces powerconsumption of the lamp up to 70% which extends lamp life as well as the projector’s lifespan. DynamicEco™ mode automatically kicks in when no signal is present or it can be manually enabled through a button on the remote. This feature also reduces fan noise and ultimately eliminates distractions. It also improves contrast ratio to 15,000:1 to tailor for professional projection performance.No space limitations with short throw functionWith its high quality short throw zoom lens, the PJD6383s delivers a 80-inch projected image at a distance of only 1.2 metres. Such a short distance allows users to share projected contents in limited space and enjoy larger presentations without interruption.Versatile connectivityVersatile connectivity including HDMI and RGB interfaces offerdiversity and high efficiency when displaying multi-media contents to enhance presentation.Crestron RoomView ® Network managementCrestron RoomView® provides an advanced, real-time alert system that sends status updates regarding power to the PC, lamp life and unit to simplify maintenance efforts. It also automates device scheduling, such as power on/off, and broadcast urgent messages via closed captioning. With smart network management, you’ll be able to save time, save money and save maintenance effort.Dynamic Movie mode for auto brightness and contrast detection With Dynamic Movie mode, the projector’s lamp automatically dims to strengthen and reveal fine details when displaying darker images. Dynamic Movie mode enhances image clarity, increases lamp life, reduces power consumption and noise.Enhanced audio quality with 10W speakerViewSonic’s PJD6383 DLP® projectors integrate a 10W speaker to provide high volume audio for classroom presentation without the need for external speakers.>>>>>>>XGA Short Throw with Network Management Projector for Education ApplicationModel No.VS14553*Running DynamicECO exclusively can extend lamp life. DLP and the DLP logo are registered trademarks of Texas Instruments and BrilliantColor is a trademark of Texas Instruments. All rights reserved b y ViewSonic Corporation. All other Corporate names and trademarks are the property of their respective companies. E&EO. Specifications are subject to change without notice. Images are for illustrative purpose only.Copyright © 2012 ViewSonic Corporation. All rights reserved. [VSE08/08/2012] PJD6383.HIGH RESOLUTION PROJECTOR FOR PERFECT CLASSROOM PRESENTATIONSPJD6383ViewSonic Corporation’s QMS & EMS have been registered to ISO 9001 & ISO 14001, respectively,by the British Standards Institution.Soft Carry CasePJ-CASE-0013D Active Shutter Glasses PGD-2503D Processor BoxVP3D1Projection Distance Screen Size (aspect ratio4:3)Meters Inches 0.5400.6500.7600.9701801.1901.2100Focus AdjustmentMini USB RS-232LAN HDMIS-Video Audio InAudio Out PowerMonitor Out。

时空手表的英语作文

时空手表的英语作文The time and space watch is an incredible invention that has revolutionized the way we perceive and interact with time. This remarkable piece of technology allows its wearer to not only tell time, but also to navigate through different points in time and space.The watch's sleek and stylish design is complemented byits advanced features, including a time-travel module that enables the user to explore different moments in history. Whether it's visiting ancient civilizations or witnessing key moments in world history, the time and space watch offers an unparalleled experience.In addition to its time-travel capabilities, the watchalso serves as a reliable timepiece, ensuring that its wearer is always punctual and on schedule. Its precision engineeringand state-of-the-art technology make it a must-have accessory for anyone with a keen interest in time and space.Furthermore, the watch's ability to transcend the constraints of time and space has significant implicationsfor scientific research and exploration. By providing scientists and researchers with the means to observedifferent periods in history, the watch has the potential to unlock countless mysteries and contribute to our understanding of the universe.From a practical standpoint, the time and space watch has also proven to be invaluable in various fields, such as archaeology, history, and space exploration. Its ability to provide firsthand access to historical events and distant planets is unprecedented, making it an indispensable tool for professionals in these fields.In conclusion, the time and space watch is a groundbreaking innovation that has redefined our relationshipwith time and space. Its extraordinary capabilities and potential applications make it a true marvel of modern technology, with far-reaching implications for science, exploration, and our understanding of the world around us.。

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∗ The support from the Swedish Research Council and from the Royal Swedish Academy of Sciences as well as the Knut and Alice Wallenberg Foundation is gratefully acknowledged.
frequently referred to as “interest points” and are attractive due to their high information contents and relative stability with respect to perspective transformations of the data. Highly successful applications of interest points have been presented for image indexing (Schmid and Mohr, 1997), stereo matching (Tuytelaars and Van Gool, 2000; Mikolajczyk and Schmid, 2002; Tell and Carlsson, 2002), optic ﬂow estimation and tracking (Smith and Brady, 1995; Bretzner and Lindeberg, 1998), and object recognition (Lowe, 1999; Hall, de Verdiere and Crowley, 2000; Fergus, Perona and Zisserman, 2003; Wallraven, Caputo and Graf, 2003). In this paper, we extend the notion of interest points into the spatio-temporal domain and show that the resulting local space-time features often correspond to interesting events in video data (see ﬁgure 1). In particular, we aim at a direct scheme for event detection and interpretation that does not require feature tracking nor computation of optic ﬂow. In the considered sample application we show that the proposed type of features can be used for sparse coding of video information that in turn can be used for interpreting video scenes such as human motion in situations with complex and non-stationary background. To detect spatio-temporal interest points, we build on the idea of the Harris and F¨ orstner interest point operators (Harris and Stephens, 1988; F¨ orstner and G¨ ulch, 1987) and describe the detection method in section 2. As events often have characteristic extents in both space and time (Koenderink, 1988; Lindeberg and Fagerstr¨ om, 1996; Florack, 1997; Lindeberg, 1997; Chomat, Martin and Crowley, 2000b; Zelnik-Manor and Irani, 2001), we investigate the behavior of interest points in spatio-temporal scale-space and adapt both the spatial and the temporal scales of the detected features in section 3. In section 4, we show how the neighborhoods of interest points can be described in terms of spatio-temporal derivatives and then be used to distinguish diﬀerent events in video. In section 5, we consider a video representation in terms of classiﬁed spatio-temporal interest points and demonstrate how this representation can be eﬃcient for the task of video registration. In particular, we present an approach for detecting walking people in complex scenes with occlusions and dynamic background. Finally, section 6 concludes the paper with the summary aoduction
Analyzing and interpreting video is a growing topic in computer vision and its applications. Video data contains information about changes in the environment and is highly important for many visual tasks including navigation, surveillance and video indexing. Traditional approaches for motion analysis mainly involve the computation of optic ﬂow (Barron, Fleet and Beauchemin, 1994) or feature tracking (Smith and Brady, 1995; Blake and Isard, 1998). Although very eﬀective for many tasks, both of these techniques have limitations. Optic ﬂow approaches mostly capture ﬁrst-order motion and may fail when the motion has sudden changes. Interesting solutions to this problem have been proposed (Niyogi, 1995; Fleet, Black and Jepson, 1998; Hoey and Little, 2000). Feature trackers often assume a constant appearance of image patches over time and may hence fail when the appearance changes, for example, in situations when two objects in the image merge or split. Model-based solutions for this problem have been presented by (Black and Jepson, 1998). Image structures in video are not restricted to constant velocity and/or constant appearance over time. On the contrary, many interesting events in video are characterized by strong variations in the data along both the spatial and the temporal dimensions. For example, consider a scene with a person entering a room, applauding hand gestures, a car crash or a water splash; see also the illustrations in ﬁgure 1. More generally, points with non-constant motion correspond to accelerating local image structures that may correspond to accelerating objects in the world. Hence, such points can be expected to contain information about the forces acting in the physical environment and changing its structure. In the spatial domain, points with a signiﬁcant local variation of image intensities have been extensively investigated in the past (F¨ orstner and G¨ ulch, 1987; Harris and Stephens, 1988; Lindeberg, 1998; Schmid, Mohr and Bauckhage, 2000). Such image points are