Purposeful mobility for relaying and surveillance in mobile ad hoc sensor networks

杭州电子科技大学《民航服务英语二》2023-2024学年第一学期期末试卷院(系)_______ 班级_______ 学号_______ 姓名_______1、“Made in China 2025” aims to transform China from a product-making factory into a product-making power, ______________ driven by innovation and emphasizing quality over quantity.A．the one that B．one thatC．one D．the one2、—What did she want to know, Tom?—She wondered we could complete the experimentA．when was it that B．it was when thatC．it was when D．when it was that3、What is your main reason for choosing one restaurant another?A．over B．ofC．from D．for4、Generally speaking, ________according to the directions, the medicine has no side effect.A．when taken B．when taking C．when to take D．when to be taken 5、Yesterday is history, tomorrow is a mystery, only today is a gift, and that is ______ we call it present.A．how B．when C．why D．where6、The cost of living in big cities ________ steadily for many years，and it has led some youths to drop out of the big city race.A．is climbing B．is being climbedC．has been climbing D．has been climbed7、______ his love, Chris sent his mom a thank-you note on Mother’s Day. A．Expressing B．Expressed C．To express D．Having expressed8、By doing so, you can ________ more information and details about the topic, and better understand it.A．keep up with B．do away withC．have access to D．get down to9、________ the program, they have to stay there for another two weeks.A．Not completing B．Not completedC．Not having completed D．Having not completed10、---When shall we start the reconstruction of the historic building?--- Not until our program ______ by the authority.A. will approveB. will be approvedC. has approvedD. has been approved第二部分阅读理解（满分20分）阅读下列短文，从每题所给的A、B、C、D 四个选项中，选出最佳选项。

2024学年第一学期奉贤区高三英语练习卷考生注意：1. 考试时间105分钟,试卷满分115分。

2. 本次考试设试卷和答题纸两部分。

所有答题必须涂（选择题）或写（非选择题）在答题纸上,做在试卷上一律不得分。

3. 务必在答题纸上填写准考证号和姓名,并将核对后的条形码贴在指定位置。

I. Grammar and vocabularySection A (10分)Directions:After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.The Best Music to Boost ProductivityHow many times have you put on your headphones to help you concentrate on your tasks? Various studies have tried to address the question of (1)________ music in the workplace can be helpful or not. The short answer seems to be yes, but it depends on the job and the music.In one study, machine operators at a clothes manufacturer became (2)________ (productive) when they listened to relaxing music; the researchers therefore suggested trying music with a faster pace instead. However, in another study (3)________ (conduct) among surgeons who operated on patients while listening to classical music, it showed that they were both faster and more accurate in performance. In this case, the researchers advised against high pace or loud music (4)________ it could be distracting.According to some scientists, no matter what task you’re engaged in, lyrics in music (5)________ negatively impact your attention. However, if (6)________ (listen) to lyric-less or classical tunes annoys you, you’re probably not going to be very productive, so it ultimately depends on your personal preference.There might be a link between ‘emotional use’ of music at work and performance, too. Essentially, if your mood improves, so does your work. To some extent, then, you may be best off playing music (7)________ makes you happy. Interestingly, though, one 2023 study, which surveyed 244 people who listened to music at work, revealed no benefit when music (8)________ (use) for cognitive thinking or just played in the background.But if you’re just here for the best tracks (9)________ (boost) your productivity, we’ve got some recommendations for you. The top three songs most often included in work-related Spotify lists (10)________ (be): ‘Drops of Jupiter’ (Train), ‘Dreams’ (Fleetwood Mac) and ‘Don’t Stop Believin’ (Journey). Integrate these songs into your workday and experience the boost in productivity they can provide.Section B (10分)Directions:Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.A. enterB. echoC. physicalD. linkedE. supposedF. initialG. literally H. diverse I.weather J. alternative K. effectivelySkyquakeIf you’ve ever heard a loud, distant booming noise with no obvious explanation like a thunderstorm or a car backfiring, then you might have experienced a skyquake. Skyquakes have been reported around the world and locals have ___11___ names for them in different regions. Near Seneca Lake in New York State, they’re known as ‘Seneca guns’; in Belgium they’re called ‘mistpoeffers’; and the Japanese refer to them as ‘uminari’, which ___12___ means ‘cries from the sea.’ Some scientists have suggested that a type of meteor(流星)could be the cause. These space rocks explode when they ___13___ Earth’s atmosphere. If this occurred above thick cloud, the sound could ___14___ across a wide area. However, there is no ___15___ evidence reaching the ground.A(n) ___16___ explanation is the gas coming out of the bottom of the lake. Several hot spots for skyquake activity are close to large, deep lakes, such as Seneca. But skyquakes have also been reported away from such water bodies.Researchers at the University of North Carolina compared local news reports with information from ___17___ sensors and earthquake detectors. They were unable to identify any earthquake activity that coincided with the strange noises, ___18___ ruling out ground shaking as the cause of it. They concluded that this phenomenon is ___19___ to the atmosphere. Possible reasons could include meteors exploding in the sky or the sound of big waves getting louder because of special weather conditions near the ocean. Over the years, many of these ___20___ mystery noises have turned out to be caused by military planes flying faster than the speed of sound.Given the diversity of locations and explanations, it’s possible that skyquakes in different parts of the world have different causes. But for now, their true cause remains mysterious.II. Reading Comprehension (45分)Section A (15分)Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.The rigid corridors of Welton Academy carried the weight of tradition and conformity (循规蹈矩). John Keating, an English teacher with a(n) ___21___ of mystery and passion, stepped into the academy like a breath of freshness in a dull room. His very presence was a(n) ___22___ to the long-established norms of the school.He was not one to simply stand at the front of the classroom and lectured about Shakespeare’s poetry or the rules of grammar. ___23___, he had a unique way of making the words come alive. In his first class, he walked into the room, a twinkle in his eye, and led the boys out into the hallway.Pointing at the old, faded pictures of former students, he said, “Carpe diem, boys. Seize the day. Make your lives ___24___. These men were once just like you, with dreams and potential. Don’t let this place bury your ambitions.”His special haven, the “Whispers of the Bard,” was a magical place hidden away from the ___25___ eyes of the school authorities. Here, under the open sky, Keating would gather the students around him. He would recite poetry with such enthusiasm that the words seemed to ___26___in the air. “Poetry,” he told them, “is not just about rhymes and meters. It’s the language of the ___27___. It’s the way we express the deepest desires and the wildest dreams that we hold ___28___us.”He encouraged each student to find their own voice between the lines of the great poets. To Neil Perry, who had a hidden passion for the ___29___ burning like a small fire in his heart, Keating was like a guiding star. He saw the potential in Neil’s eyes and said, “Neil, the stage is waiting for you. Don’t let anyone even your father ___30___ your light. Your dreams are precious, and you have the talent to make them come true.” He helped Neil practice his lines, showing him how to ___31___ his emotions through every word. Under Keating’s guidance in every session, Neil grew more confident, believing that he could even ___32___ what his father expected of him.For Todd Anderson, who was shy and often ___33___ by his brother seemingly excellent at everything, Keating noticed his talent for seeing the deeper meaning in literature. “Todd,” he said, “your mind is a treasure chest. Open it and share your thoughts with the world. Don’t be afraid to ___34___. Your interpretations are as valuable as any other’s.” With Keating’s encouraging words, Todd started to come out of his ___35___, finding the courage to speak up and express himself.Keating’s encouragement was like a gentle wind that blew through the lives of these students, fanning the flames of their dreams and giving them the strength to pursue what they truly loved.21. A.air B.gesture C.mood D.outlook22. A.threat B.barrier C.challenge D.opportunity23. A.However B.Therefore C.Instead D.Moreover24. A.mysterious B.extraordinary C.practical D.specific25. A.caring B.shining C.wandering D.watching26. A.dance B.float C.move D.slide27. A.insight B.innocence C.soul D.sense28. A.between B.upon C.into D.within29. A.poetry B.stage C.match D.music30. A.dim B.adjust C.flash D.fuel31. A.conceal B.project C.stimulate D.sustain32. A.fall within B.persist in C.keep off D.go beyond33. A.overseen B.overshadowed C.overestimated D.overlooked34. A.step away B.fit in C.stand out D.push forward35. A.routine B.shell C.circle D.spaceSection B (22分)Directions:Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B, C and D. Choose the one that fits best according to the information given in the passage you have just read.AIn the year 1669, a German trader named Hennig Brand set out on an unusual quest that would lead to one of the most fascinating discoveries in the history of chemistry. Brand, driven by the age-old alchemists’ dream of magically turning base metals into gold, conducted a series of experiments that would forever change our understanding of elements.Brand’s journey began with an assumption that the key to creating “gold” resided in human urine (尿液). This seemingly strange idea was fueled by the observation that urine shared a similar yellow color with the precious metal. Acting on this belief, Brand collected an astonishing 5000 liters of urine and allowed it to stand and ferment (发酵).After weeks of fermentation, Brand boiled the urine down to a thick, sticky substance. He then mixed this paste with sand and heated the mixture to an extreme temperature. What emerged from this process was a substance that was entirely new to the world of science – a white solid that shone with a soft light in the dark.Brand named this glowing material “phosphorus,” originating from the Greek words for “light bearer.” The discovery of phosphorus was not just a scientific breakthrough; it captured the imagination of the public and the scientific community alike. Its ability to give off light in the darkness was both fascinating and mysterious.The implications of Brand’s discovery were far-reaching. Phosphorus was not only a novelty but also a substance with practical applications. It would later become an essential component in the production of matches, fertilizers, and various chemicals.Hennig Brand’s accidental discovery of phosphorus in 1669 was more than just finding a new element; it marked the end of the era of the period of magic chemistry and the beginning of modern chemistry. Brand’s phosphorus, once sought as a means to wealth, became a cornerstone in the field of science, a clear demonstration of power of curiosity and the unexpected paths that can lead to enlightenment.36.What is the main idea of the passage?A. The fall of ancient alchemists and the rise of modern chemists.B. The accidental discovery of phosphorus and its scientific impact.C. The importance of human urine in scientific experiments.D. The transformation of base metals into gold through magic.37.What was Hennig Brand’s initial goal when he started his experiments?A. To turn human urine into gold.B. To discover a new element.C. To produce a glowing substance.D. To reform modern chemistry.38.The underlined word “cornerstone” in the last paragraph is closest in meaning to ______.A.mysteryB.symbol C.obstacle D.foundation39.What can be inferred about Hennig Brand from the passage?A. He was a serious chemist who followed established scientific methods.B. He was a visionary scientist who predicted the future of chemistry.C. He was a curious individual willing to explore unconventional ideas.D. He was a wealthy trader with a deep understanding of chemistry.BGoing underground?The Subway is the easiest way to get around the City Centre and West End of Glasgow. Running every four minutes at peak times, it takes just 24 minutes to complete a circuit of the 15 stations and costs from as little as £1.80 for an adult single to travel anywhere else on the system.First Trains Last TrainsOuter CircleMon. to Sat. Sun. Outer Circle Mon. to Sat. Sun. From Govan06:30 10:00 From Govan 23:16 17:50 From St Enoch06:34 10:03 From St Enoch 23:30 18:03 Inner CircleMon. to Sat. Sun. Inner Circle Mon. to Sat. Sun. From Govan06:30 10:00 From Govan 23:16 17:50 From St Enoch 06:32 10:00 From St Enoch23:28 18:00 Subway ticketsType Adult Child*** unlimited travel for one day ** Applies to children under 16 years old. Children under five travel for free if accompanied by a fare paying adult.Single£1.80 £0.85 Return£3.40 £1.60 All day* £4.30 £2.1540. According to the notice board, which of the following is TRUE ?A. The subway is the only way to travel in the city.B. The subway runs every 4 minutes any time of the day.C. An entire journey of 24 stations takes 15 minutes.D. An adult ticket for a full circuit costs only £1.80.41. To arrive at Kelvinbridge on a weekday morning as soon as possible, you can take the earliesttrain from St Enoch at ____________.A. 6:34B. 6:32C. 10:00D. 10:0342. A couple taking a 15-year-old and a newborn on a ONE-DAY trip in Glasgow can maximize theirsubway experience by paying ____________.A. £6.45B. £8.40C. £10.75D. £12.90CFor the first time, scientists have observed the brain throughout the pregnancy (怀孕) timeline. Sex hormones, like estrogen and testosterone, are powerful players in the brain, affecting mood, memory, and more. Some of the most dramatic hormonal changes that humans experience happen during pregnancy, and yet those nine months have been a black box for human neuroscience until now.A new study published this week in Nature Neuroscience provides the most extensive look inside that black box yet. Researchers scanned the brain of one woman 26 times over the entire course of her pregnancy – before, during and after. Brain scans show that tracks of white matter get stronger during pregnancy. Previous brain imaging studies from before and after pregnancy have shown that pregnancy shrinks (缩小) parts of the brain, specifically its gray matter. These outer layers of the brain are responsible for most of sensation, learning and other great things the brain does.Shrinking gray matter may sound scary, but it happens to all of us throughout development to fine-tune our neural processing and make our brains more efficient. Though the term “mommy brain” is often used to refer to the brain fog and forgetfulness some people feel during pregnancy, the brain changes are likely adaptive. For example, you may be forgetting where your keys are, but you are way more focused on what is happening to your baby. Researchers are particularly interested in changes within brain regions that help with social cognition by allowing us to take on others’ perspectives.The scale and pattern of brain changes during pregnancy are similar to what other researchers have seen in adolescent brains during puberty (青春期), also driven by hormones. Other researchers have been able to detect whether someone had been pregnant based only on neuro imaging data from decades later. So despite the common saying that our brains stop developing in our mid-20s, hormones seem to drive big, long-lasting changes throughout adulthood.From studying the woman’s brain, researchers confirmed gray matter decreased by four percent over the course of pregnancy and that decrease persisted throughout the end of the study two years after giving birth. And it wasn’t just one area or network – 80% of brain regions shrunk. While certain areas and networks changed faster than others, the team doesn’t yet know what the implications are.43. The passage mainly tells us __________________.A. how pregnancy impacts women’s memoryB. how brain scans lead to a breakthroughC. how puberty differs from pregnancyD. how brain changes during pregnancy44. Based on the research, a pregnant woman should ______ changes accompanying “mommy brain”?A. peacefully acceptB. consciously avoidC. completely ignoreD. eagerly expect45. We can learn from the last two paragraphs that ________________________.A. researchers have figured out why certain areas of brain change fasterB. despite similarity, brain changes in puberty aren’t driven by hormonesC. hormones are likely to cause brain changes beyond adolescenceD. the shrinkage of gray matter in brain stops shortly after child birth46. What is the structure of this passage? A.B.C. Introducing a topic Providing examples Stating a problem Proposing solutionsEvaluating the solutions Presenting a finding Explaining Relating with other findingsSummarizing the main pointsD.Describing a phenomenon Analyzing the causesSection C (8分)Directions:Read the passage carefully. Fill in each blank with a proper sentence given in the box. Each sentence can be used only once. Note that there are two more sentences than you need.A.Previously, they’ve trained packs of hero rats to detect dangerous bacteria.B.Then they were introduced to common scents used to mask illegal wildlife trade.C.This effort aims to provide a low-cost detection system to prevent illegal hunting.D.However, there are concerns that the rats might be distracted by some common scents.E.Existing screening tools are expensive and time intensive, necessitating a new approach.F.For this purpose, these trained rats will be expected to work in likely hotspots for illegalwildlife trade.Ratting on Crimes“You are never more than six feet away from a rat,” goes the saying. Though it has been concluded that this estimate is incorrect, it might soon be accurate for those involved in the illegal wildlife trade.A team of researchers have trained African rats to pick up the scents (气味) of endangered animal products, such as elephant ivory and rhino horn. 47.__________The rat pack can even identify these items when concealed among other substances, and have been shown to remember the smells after months of non-exposure. This isn’t the first time APOPO, a Tanzania-based non-profit, have recognized a potential for a super-rat workforce. 48.__________ The organization looks to provide low-tech, cost-efficient solutions to pressing challenges throughout Africa.The rats in the new study went through several demanding stages of training. They first learned to smell a target scent for several seconds to earn a flavoured reward. 49.__________ The final step was memory consolidation training, where they were reintroduced to scents they’d not encountered for five and eight months, respectively. Despite the months of non-exposure, the rats showed perfect memory scores, suggesting that their cognitive memory performance is similar to that of dogs.Illegal capture, killing, and harvesting of animals and plants have increased dramatically in recent years. For example, 55 African elephants are killed for their tusks every day, over 20,000 a year. This has to be stopped immediately.50.__________ They will be armed with custom-made vests (马甲). With their front paws, they will be able to pull a small ball attached to the chest of their vest, which gives out a beeping sound. This way rats will be able to alert handlers when they detect a target. Once fully trained and prepared, these giant rats could become illegal hunters’ worst enemy.III. Summary Writing (10分)51. Directions: Read the following passage. Summarize the main idea and the main point(s) of the passage in no more than 60 words. Use your own words as far as possible.The Significance of Cattle in Maasai SocietyCattle are the traditional partners of the Maasai people of East Africa. The traditional Maasai diet is heavily centered around cattle products. Milk is a fundamental component of the Maasai diet, consumed daily and in various forms. Fresh milk, known as “enkirowua”, is often drunk straight or mixed with herbs for added flavor and medicinal benefits. Processed milk, or “mokore”, is a popular variation, providing rich source of nutrition. Cattle’s meat is another important part of the Maasai diet, consumed during special occasions and ceremonies. Every part of the animal is used, reflecting the Maasai’s resourcefulness and respect for their livestock. It represents strength and the community’s collective wealth.Cattle hold significant value in Maasai social life. An individual’s social status is heavily influenced by cattle ownership. The number of cattle one possesses directly relates with his standing in the community. This is particularly evident during traditional ceremonies, such as weddings, where the exchange of cattle as gifts signifies the strong bond between families and a shared commitment to the future. Families there share responsibilities in cattle care and their collective management promotes unity and teamwork. For example, the process of milking is a shared activity, involving both men and women and strengthening social bonds. It is especially vital during challenging times, such as droughts or other hardships when the well-being of the cattle is crucial.Cattle also play a big role in Maasai rituals and ceremonies, accompanying individuals from birth to death. For example, the sacrifice of a cow during naming ceremonies or funerals not only celebrates the occasion but also strengthens the community’s spiritual connection with their livestock. These rituals highlight the spiritual importance of cattle, seen as a link between the physical and spiritual worlds, thus firmly establishing their central role in Maasai culture.IV. Translation (15分)Directions: Translate the following sentences into English, using the words given in the brackets.52. 农忙季节,这个偏远的小村子显得空荡荡的。

2022年考研考博-考博英语-电子科技大学考试全真模拟易错、难点剖析AB卷（带答案）一.综合题(共15题)1.单选题I recommend that the planning（）until all the materials have been supplied.问题1选项A.is not startedB.will not be startedC.not be startedD.is not to be started【答案】C【解析】句意:我建议应该在所有的材料己被提供后才启动这个计划。

语法题。

考查虚拟语气。

句子谓语为recommend,表示要求建议,这类动词所接的宾语从句一般用虚拟语气: (should) +原形动词，且should —般会省略,故选C。

2.单选题This is not the right（）to ask for my help; I am far too busy even to listen.问题1选项A.timeB.opportunityC.chanceD.case 【答案】A【解析】句意:这不是向我寻求帮助的恰当吋机，我太忙了，甚至没时间倾听。

考查固定搭配。

it is the right time to do sth. 是做某事的恰当时机。

故选A。

3.单选题She was so fat that she could only just（）through the door.问题1选项A.assembleB.appearC.squeezeD.gather【答案】C【解析】句意:她如此胖，以至于只能挤过这扇门。

考查动词辨析。

assemble 聚集，集合，收集;appear 出现，显得，似乎，看来；squeeze 挤，紧握，勒索；squeeze through 挤过，勉强通过;gather 收集，收割，使……聚集。

故C符合句意。

4.单选题The government（）to approve the use of wide-spread surveillance when the Justice Department took objections.问题1选项A.is goingB.had beenC.was aboutD.is coming【答案】C【解析】句意:政府即将同意采取广泛监督的手段吋，却遭到了司法部的反对。

2022年考研考博-考博英语-北京航空航天大学考试全真模拟易错、难点剖析B卷（带答案）一.综合题(共15题)1.单选题Email is a convenient, highly democratic informal medium for conveying messagesthat（）well to human needs.问题1选项A.adheresB.conformsC.satisfiesD.reflects【答案】B【解析】动词辨析。

adheres坚持，黏附；conforms符合；satisfies满足，使满意；reflects反射，考虑。

句意：电子邮件是方便的、高度大众化的用于传递信息的非正式媒介，它（）人们的需求。

从语义上来说，B项和C项都可以,但是satisfy是及物动词，排除。

conform to意为“符合，遵照，顺应”，因此正确答案是B选项。

2.单选题All the ceremonies at the 2000 Olympic games had a unique Australian flavor, （）of their multicultural communities.问题1选项A.noticeableB.indicativeC.conspicuousD.implicit【答案】B【解析】形容词辨析。

noticeable明显的；indicative表示的，象征的；conspicuous明显的，惹人注目的；implicit不言明的，含蓄的，无疑问的。

句意：2000年奥运会所有的仪式都带有一种独特的澳大利亚风情，（）他们是多元文化的社会。

B选项indicative在此符合句意,意为“表明他们是多元文化的社会”。

3.单选题While typing, Kathy had a habit of stopping（）o give her long and flowing hair a smooth. 问题1选项A.promptlyB.simultaneouslyC.eventuallyD.occasionally【答案】D【解析】副词辨析。

英语试卷注意事项：1.答题前，考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚。

2.每小题选出答案后，用2B 铅笔把答题卡上对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其他答案标号。

在试题卷上作答无效。

3.考试结束后，请将本试卷和答题卡一并交回。

满分150分，考试用时120分钟。

第一部分听力（共两节，满分30分）注意，听力部分答题时，请先将答案标在试卷上。

听力部分结束前，你将有两分钟的时间将答案转涂到答题卡上。

第一节（共5小题；每小题1.5分，满分7.5分）听下面5段对话。

每段对话后有一个小题，从题中所给的A 、B 、C 三个选项中选出最佳选项，并标在试卷的相应位置。

听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1.How does the man feel?A.Cold.B.Warm.C.Hot.2.What is the woman doing?A.Working on the marketing plan.B.Writing a monthly report.C.Playing computer games.3.Where does the woman want to go?A.The Art Gallery. B.Beijing Road.4.What is the man going to do next?A.Stop for a rest.B.Keep handling the problem alone.C.Make a phone call.5.What does the woman want the man to do?A.Apologize to her.B.Lower the volume.C.Put on the headset.第二节（共15小题；每小题1.5分，满分22.5分）听下面5段对话或独白。

2023年全国硕士研究生招生考试（英语二）参考答案及解析Section Ⅰ Use of EnglishHere’s a common scenario that any number of entrepreneurs face today: you’re the CEO of a small business and though you're making a nice 1 , you need to find a way to take it to the next level. what you need to do is 2 growth by establishing a growth team. A growth team is made up of members from different departments within your company, and it harnesses the power of collaboration to focus 3 on finding ways to grow.Let's look at a real-world 4 . Prior to forming a growth team, the software company BitTorrent had 50 employees.Working in the 5 departments of engineering, marketing and product development. This brought them good results until 2012, when their growth plateaued. The 6 was that too many customers were using the basic, free version of their product. And 7 improvements to the premium, paid version, few people were making the upgrade.Things changed, 8 , when an innovative project marketing manager came aboard, 9 a growth team and sparked the kind of 10 perspective they needed. By looking at engineering issues from a marketing point of view, it became clear that the 11 of upgrades wasn't due to a quality issue. Most customers were simply unaware of the premium version and what it offered.Armed with this 12 , the marketing and engineering teams joined forces to raise awareness by prominently 13 the premium version to users of the free version. 14 ,upgrades skyrocketed, and revenue increased by 92 percent.But in order for your growth, team to succeed, it needs to a have a strong leader. It needs someone who can 15 the interdisciplinary team and keep them on course for improvement.This leader will 16 the target area, set clear goals and establish a time frame for the 17 of these goals. This growth leader is also 18 for keeping the team focus on moving forward and steer them clear of distractions. 19 attractive, new ideas can be distracting, the team leader must recognize when these ideas don’t 20 the current goal and need to be put on the back burner.1.A. purchase B. profit C. connection D. bet2.A. define B. predict C. prioritize D. appreciate3.A. exclusively B. temporarily C. potentially D. initially4.A. experiment B. proposal C. debate D. example5.A. identical B. marginal C. provisional D. traditional6.A. rumor B. secret C. myth D. problem7.A. despite B. unlike C. through D. besides8.A. moreover B. however C. therefore D. again9.A. inspected B. created C. expanded D. reformed10.A.cultural B. objective C. fresh D. personal11.A. end B. burden C. lack D. decrease12.A. policy B. suggestion C. purpose D. insight13.A. contributing B. allocating C. promoting D. transferring14.A. As a result B. At any rate C. By the way D. In a sense15.A. unite B. finance C. follow D. choose16.A. share B. identify C. divide D. broaden17.A. announcement B. assessment C. adjustment D. accomplishment18.A. famous B. responsible C. available D. respectable19.A. Before B. Once C. While D. Unless20.A. serve B. limit C. summarize D. alter【1】B. profit 原文提到“小公司的CEO也挣到了大钱”。

▪ Protection Requirements
• Breaker Failure Basics
▪ Protection Requirements
Agenda 3
▪ Transmission System Protection Basics
• Step Distance Principles • Types of Relaying and Schemes Used • Pilot and Communications • Infeed • Benefit of Using Pilot Schemes and Effect on
speed control. ▪ Excessive load will bog down the system
frequency. ▪ Light load conditions will increase system
frequency.
Unique Dynamic Characteristics
Objective 6
▪ Increase knowledge of recommended protection for power plant and transmission system.
• Provide transmission protection engineers with insight into power plant protection issues.
▪ Facilitate improved coordination between power plant and transmission system protection.
Introduction to Protection 7

Protective RelayingModern, time-efficient, and interactive hands-on training Protective relaying providesdetection of abnormal operatingconditions in electrical systemsand is needed in order to actquickly to protect circuits, equip-ment, and the general public.The theoretical background, aswell as practical application, ofthese protective devices and theirprotection functions are animportant part of the education ofpower systems for electrical engi-neers.Power-utility-grade equipment,Siemens’ newest generation theSIPROTEC 5 series, is used in thisinnovative teaching approach.Example scenarios are created inthe accompanying professionalprogramming tool, DIGSI 5, whichallows users to create differentsetups and simulate possiblefaults using the built-in relay test-ing unit. The response of the relayis then analyzed with the relaydisplay and the fault record.This customizable solution allowsperfect alignment for individualteaching needs. The availablerange of relays and manuals pro-vide coverage of these generaltopics:• Overcurrent/OverloadProtection• Directional Protection• Differential Protection• Distance ProtectionDidactic Short InformationDID1052ENCustomizationIndividual, cost-effective learning solutions are created by combining a maximum of two hardware relays with the corresponding courseware.Comprehensive CoursewareTheoretical knowledge and hands-on training exercises teach students the basic and advanced relay protection functions.The courseware provides the follow-ing topic coverage:Overcurrent/Overload Protection • Evolution of protective relays• Overcurrent protection• Overcurrent and overload protec-tion of AC machines and power transformers• Overcurrent protection of radial feedersDirectional Protection• Protection of parallel power lines using overcurrent relays• Directional overcurrent protection • Directional comparison protection • Directional power protection Differential ProtectionBasic implementation of differentialprotection:• Effect of the current measuring erroron the sensitivity of current differ-ential protection• Percentage restrained differentialprotection• Application of differential protectionDistance Protection• Simplified diagram of a powersystem• Conventional time-stepped distanceprotection• Distance relay impedance charac-teristic• Fault impedance vs. load imped-ance• Line protection• Generator loss-of-excitation protec-tion• Distance protection using communi-cation-assisted tripping schemesState of the art HardwareThe front display and keypad of therelays allow direct user interactionwhile communication with the PCsoftware is through USB or Ethernet.The units can be used table-top or inan A4 frame. The hardware providesthe following ANSI/IEEE protectionfunctions:Numerical Overcurrent Relay• Directional phase overcurrent (67)• Directional ground overcurrent(67N)• Directional power (32)• Instantaneous phase overcurrent(50)• Instantaneous ground overcurrent(50N)• Phase overcurrent (51)• Ground overcurrent (51N)Numerical Distance Relay• Phase distance (21)• Ground distance (21N)• Directional phase overcurrent (67)• Directional ground overcurrent(67N)• Directional power (32)• Instantaneous phase overcurrent(50)• Instantaneous ground overcurrent(50N)• Phase overcurrent (51)• Ground overcurrent (51N)Numerical Differential Relay• Numerical Differential Relay• Transformer differential (87T)• Instantaneous phase overcurrent(50)• Instantaneous ground overcurrent(50N)• Phase overcurrent (51)• Ground overcurrent (51N)DID152EN©216FestoDidacticSE.Protective RelayingFesto Didactic SERechbergstraße 373770 DenkendorfGermanyPhone: +49/711/3467-0Fax: +49/711/34754-88500************.com。

Are you an experienced pilot with a passion for helping others in need? Do you have the skills and dedication required to perform highstress rescue missions? If so, we are looking for you to join our team of elite rescue pilots!Our organization specializes in providing rapid and effective assistance to those in distress, whether it be in the form of medical evacuations, search and rescue operations, or disaster relief efforts. As a rescue pilot, you will play a crucial role in these missions, utilizing your expertise and skill to navigate challenging environments and deliver lifesaving aid.Key qualifications for this position include:1. Certified Pilot License: A valid and current pilots license with appropriate ratings for the type of aircraft you will be flying.2. Experience: Prior experience in flying rescue missions or similar highstress environments is highly desirable.3. Physical Fitness: The ability to meet the physical demands of the role, including long hours, high altitudes, and potential exposure to extreme weather conditions.4. Calm Under Pressure: The capacity to remain focused and make clear decisions in highstakes situations.5. Team Player: A strong sense of teamwork and the ability to coordinate effectively with ground crews, medical personnel, and other pilots.6. Excellent Communication Skills: The ability to communicate clearly and concisely with all team members and control centers.7. Adaptability: The flexibility to adjust to changing conditions and mission parameters quickly and efficiently.8. Technical Knowledge: A thorough understanding of aircraft systems and the ability to perform preflight checks and troubleshooting as needed.Responsibilities of the role will include:Conducting preflight inspections and ensuring the aircraft is in optimal condition for each mission.Flying rescue missions, including but not limited to medical evacuations, search and rescue, and disaster relief.Collaborating with mission coordinators to plan and execute rescue operations.Maintaining accurate and detailed records of all flight activities and mission outcomes. Participating in regular training exercises to maintain proficiency and update skills.If you are ready to take on the challenge of a rewarding career as a rescue pilot, we encourage you to apply. Together, we can make a difference in the lives of those who need us most. Please submit your application along with your resume and any relevant certifications to our recruitment team.。

希望拥有瞬间移动英语作文Title: The Phenomenon of Teleportation: A Scientific Exploration。

Teleportation, the instantaneous movement of objects or individuals from one location to another, has captured the imagination of humanity for decades. While it has been a staple in science fiction narratives, the prospect of real-life teleportation raises profound questions about the nature of space, time, and the limits of human understanding. In this essay, we will delve into the concept of teleportation, its potential implications, and the current state of scientific research in this field.Teleportation, in its essence, involves the disassembly of an object or person into data, which is then transmitted to another location and reassembled. This process bypasses conventional modes of transportation and seemingly defies the constraints of distance and time. The allure of teleportation lies in its promise of near-instantaneoustravel, eliminating the need for lengthy commutes and transcending geographical boundaries.One of the most prominent theories underlying teleportation is quantum entanglement, a phenomenon observed at the subatomic level where particles become interconnected regardless of the distance between them.This interconnectedness suggests the possibility of transmitting information instantaneously across vast distances, laying the groundwork for teleportation. However, harnessing quantum entanglement for practical teleportation remains a formidable challenge due to the delicate natureof quantum states and the technical hurdles involved in controlling them.Another approach to teleportation involves quantum teleportation, a process that relies on the principles of quantum mechanics to transfer the state of one particle to another instantaneously. While experiments havesuccessfully demonstrated quantum teleportation over short distances in controlled environments, scaling up this technology to teleport macroscopic objects, let alonehumans, presents significant obstacles. The fidelity of teleportation, ensuring that the object arrives intact and unaltered at its destination, is a paramount concern that must be addressed.Furthermore, ethical considerations surrounding teleportation abound. The prospect of deconstructing and reconstructing living organisms raises profound questions about identity, consciousness, and the sanctity of life. Would a teleported individual retain their memories, personality, and sense of self? Or would they be reduced to mere copies, devoid of the essence that defines their humanity? These ethical quandaries underscore the need for careful deliberation and ethical oversight in the pursuit of teleportation technology.Despite these challenges, recent advancements in quantum computing, nanotechnology, and materials science have reignited interest in teleportation research. Breakthroughs in quantum teleportation protocols, such as the development of more robust quantum error correction codes, offer glimpses of progress toward practicalteleportation systems. Furthermore, interdisciplinary collaborations between physicists, engineers, andbiologists are shedding light on the fundamental principles underlying teleportation and its potential applications in fields ranging from medicine to space exploration.In conclusion, teleportation represents a tantalizing frontier in scientific inquiry, promising to revolutionize the way we perceive and interact with the world. While the realization of practical teleportation remains a distant prospect, ongoing research endeavors hold the promise of unraveling the mysteries of instantaneous travel. As we navigate the complexities of teleportation, we must remain vigilant in our ethical considerations and mindful of the profound implications that this technology may hold for humanity's future.。

Operating Instructions for:15900-15910-15910C15920-15930-15930C15940-15950-15950CRev 07/08AIR HYDRAULIC PUMPMax. Pressure: Check Data Plate for Max PressureWorkstation Sound Pressure Level: 83 dB(A) at Rated CapacityDefinition: An air hydraulic pimp delivers hydraulic fluid under pressure through the use of compresses air as a power source.SAFETY EXPLANATIONSTwo safety symbols are used to identify any action or lack of action that can cause personal injury. Your reading and understanding of these safety symbols are very important-Danger is used only when your action or lack of action will cause serious human injury or death.- Warning is used to describe any action or lack of action where a serious injury can occur. IMPORTANT – Important is used when action or lack of action can cause equipment failure, either immediate or over a long period of time.: It is the operator’s responsibility to read and understand the following safety statements, •Only qualified operators should install, operate, adjust, maintain, clean, repair, or transport this machinery•These components are designed for general use in normal environments. These components are not specifically designed for lifting and moving people, agri-food machinery, and certain types of mobile machinery or special work environments such as: explosive, flammable or corrosive. Only the user can decide the suitability or this machinery in these conditions or extreme environments. AME will supply information necessary to help make these decisions.These instructions are intended for end-user application needs. Most problems with new equipment are caused by improper operation or installation. Detailed service repair instructions or parts list can be obtained from AME.Operating InstructionsSAFETY PRECAUTIONSGeneral Operation•All WARNING statements must be carefully observed to help prevent personal injury.•Before operating the pump, all hose connections must be tightened with the proper tools. Do not over tighten.Connections should be only be tightened securely and leak-free. Over tightening can cause premature thread failure or high pressure fittings to split at pressures lower than their rated capacities.•Should a hydraulic hose ever rupture, burst, or need to be disconnected, immediately shut off the pump and release all pressure. Never attempt to grasp a leaking pressurized hose with your hands. The force of escaping hydraulic fluid could cause serious injury.•Do not subject the hose to potential hazard such as fire, sharp surfaces, extreme heat or cold, or heavy impact.Do not allow the hose to be altered or kink, twist, curl, crush, cut, or bend so tightly that the fluid flow within the hose is blocked or reduced. Periodically inspect the hose for wear, because any of these conditions can damage the hose and possibly result in personal injury.•Do not use the hose to move attached equipment. Stress can damage hose and possibly cause personal injury.•Hose material and coupler seals must be compatible with the hydraulic fluid used. Hoses also must not come in contact with corrosive materials such as creosote-impregnated objects and some paints. Consult the manufacturer before paining a hose. Hose deterioration due to corrosive materials can result in personal injury.Never pain the couplers.•Inspect machine for wear, damage and correct function before each use. Do not use machinery that is not in proper working order, but repair or replace it as necessary.•Replace worn or damaged safety decals.•Modification of a product requires written AME authorization.•Use only components with the same pressure rating when assembling a system or machine.Pump•Do not exceed the hydraulic pressure rating noted on the pump data plate or tamper with the internal high pressure relief valve. Creating pressure beyond the rated pressure can result in personal injury.•Before replenishing the fluid level, retract the system to prevent overfilling the pump reservoir. An overfill can cause personal injury due to excess reservoir pressures created when cylinders are retracted.Air Supply•Shut off and disconnect the air supply when the pump is not in use or before breaking any connections in the system.PREPARATION & SET-UPAir Supply Hook-UpRemove the thread protector from the air inlet of the pump. Select and install the threaded fittings which are compatible with your air supply fittings. The air supply should be 20 CFM (.57 M3/min.) and 100 PSI (7 BAR) at the pump to obtain the rated hydraulic pressure. Air pressure should be regulated to a maximum of 140 PSI (9 BAR). Secure your pump fitting to the air supply. See illustrations on following pages.: If improperly used, pressurized equipment can be potentially hazardous. Therefore: •Hydraulic connections must be securely fastened before building pressure in the system.•Release all system pressure before loosening any hydraulic connection in the systemVenting the ReservoirTo improve hydraulic fluid delivery and increase useable hydraulic fluid capacity,Remove shipping plug and install filler/vent cap before using the pump.InstructionsOperatingHydraulic ConnectionsClean all the areas around the fluid ports of the pump and cylinder. Inspect all the threads and fittings for signs of wear or damage and replace as needed. Clean all hose ends, couplers and union ends. Remove the thread protectors from the hydraulic fluid outlets. Connect the hose assembly to the hydraulic fluid outlet and couple the hose to the cylinder. See illustrations below.IMPORTANT: Seal all external pipe connections with a high-grade, non-hardening thread sealant. Teflon tape may also be used to seal hydraulic connections, provided only one layer of tape is used. Apply the tape carefully, two threads back, to prevent it from being pinched by the coupler and broken off inside the system. Any loose pieces of tape could travel through the system and obstruct the flow of fluid or cause jamming of precision-fit parts.This pump is equipped with a two position, 3-way / 4-way control valve for operating single- or double acting hydraulic cylinders and requires attaching the hoses in the following manner:When using a single-acting cylinder, attach one end of a hose to port ‘’A’’ of valve and the end of the hose to the advance port ‘’C’’ of the cylinder. Then Install a pipe plug in valve port ‘’B’’. If the hoses are frequently connected and disconnected, quick couplers should be used to prevent wear and tear on the fittings.When using a double-acting cylinder, attach one hose to port ‘’A’’ of valve and the other end of the hose to the advance port ‘’C’’ of cylinder. Attach the second hose to valve port ‘’B’’ and the other end of the hose to cylinder.ofportreturn‘’D’’Operating InstructionsFor Remote Controlled Pumps:1.Connect the pump to a remote 3-way/4-way valve2.Connect the fluid line from the pressureport on the manifold to the pump pressureport on the valve.3.Connect the fluid line from the fluidreturn port on the manifold to the pumpreturn port on the valve.4.Connect the cylinder(s) to the valve.IMPORTANT: On all single pressure lineapplications, plug one port on the valve.1.Connect the ports of the pump valve toCylinder(s). When port ‘’A’’ ispressurized port ‘’B’’ becomes the return.When port ‘’B’’ is pressurized, port ‘’A’’becomes the return.2.Place the valve into the ‘’A’’ or ‘’B’’Position in order to pressurize thecylinder(s) or start the pump.Operating InstructionsOPERATIONPICTOGRAM DEFINITIONSActivating the pump with the pedal end marked with this pictogram,the flow of fluid is directed out of the reservoir.Activating the pump with the pedal end marked with this pictogram,the flow of fluid is directed back to the reservoir.Priming the Pump UnitUnder certain circumstances it may be necessary to prime the pump unit. To accomplish this, perform the following procedure:For Hand/Foot Operated Pumps:1.Press the release end of the pedal while holding down the air intakeValve with a flathead screwdriver. The air intake valve is locateddirectly under the pedal in the area marked . The Valve isdepressed simultaneously with the area of the pedal duingprinting.2.Allow the pump to cycle approximately 15 seconds.3.Remove the screwdriver, and press end of the pedal oncemore.4.If the cylinder extends or pressure builds, the pump has beensuccessfully primed. If the pump does not respond, repeat theprocedure, jogging the air intake valve while holding the pedal inthe position.For Manual Valve Operated Pumps:Disconnect the hose end at the advance port of the cylinder. Direct the hose end into a suitable container or back into the pump reservoir. Shift the valve to the ADVANCE position and depress the end of the foot pedal inscribed with. Allow the pump to cycle until the fluid begins to flow freely into the container or reservoir. Reconnect the hose end to the cylinder advance port. Shift the valve to the Advance position and reactivate the pump. If the cylinder extends or builds pressure, the pump has been successfully primed. If not refer to the Trouble - Shooting Guide of these instructions.For Remote Controlled Pumps:Depress the AND buttons on the remote hand control simultaneously and allow the pump to cycle for approximately fifteen seconds. Release both buttons and then depress the button once more. If the cylinder extends or pressure builds, the pump has been successfully primed. If the pump does not respond repeat the procedure. If the pump still does not respond, tip pump upside down and repeat procedure.For Tandem Pumps:1.Connect the fluid line to the pressure port and keep the return port plugged. Place the other end of the fluid linein the pump filler hold.NOTE: If the fluid lines are connected to a remote valve, shift the valve into the center position and plug both cylinder ports on the valve. This lets fluid circulate through the valve and back to the pumpreservoir; thereby allowing the pump to prime.2.Attach air line with shut-off valve to the pump.3.Open the air valve, Pump will begin to reciprocate, and fluid will advance through the hose or fluid line andreturn to the pump reservoir. Allow the pump to cycle approximately 15 seconds.4.Plug the manifold pressure port, or shift the valve to pressurize the circuit.if the pump builds pressure, it has been successfully primed.Operating InstructionsPump OperationFor Hand/Foot Operated Pumps:1.To extend the cylinder, depress the pedal on the end marked2.To hold the cylinder in position, release the end of foot pedal marked with to deactivate the pump.3.To retract the cylinder, depress the pedal on the end marked .For Remote Controlled Pumps:1.To extend the cylinder, depress the button on the remote hand control marked2.To hold the cylinder in position, release the button.3.To retract the cylinder, depress the button on the remote hand control markedFor Manual Valve Operated Pumps:1.To extend the cylinder, shift the valve handle to the advance position and depress the end of the foot pedalinscribed with to activate the pump.2.To hold the cylinder in position, release the end of foot pedal inscribed with to deactivate the pump.3.To retract the cylinder, shift the valve handle to the retract position and depress the end of the foot pedalinscribed with to activate the pump.For Pumps with Air Regulators:1.Open the air shut-off valve (if so equipped) or connect the air quick coupler (if so equipped).NOTE: under certain circumstances the pump may need to be primed before operation. Refer to the method described in the section entitled ‘’Priming the Pump Unit.’’2.Slowly turn the air regulator control on unit clockwise to increase pressure, counterclockwise to decreasepressure. As air is admitted to the pump unit, It will begin to deliver fluid to the system. Continue to slowly turn the air regulator control clockwise until the gauge reads the maximum hydraulic pressure rating as stated on the pumps data plate. A maximum hydraulic pressure reading should be obtained if air pressure is approximately 100 PSI (7 BAR).3.Cycle the system several times by manually shifting the 3-way/4-way valve (if so equipped) or the remote valve(if so equipped). Set the air regulator to obtain the desired hydraulic pressure. When decreasing pressure, shift the valve after each adjustment before measuring actual hydraulic pressure.4.Shut off and disconnect air supply to the pump and shift pump valve (if so equipped) or remote valve (if soequipped) two times to release all system pressure. Check fluid level with hydraulic system retracted. The pump is now ready for operation.NOTE: • The Hydraulic pressure is increased or decreased by adjusting the air inlet pressure at the regulator.•On two stage pumps, the air pressure regulator that is mounted on the pump controls only the output from the high pressure stage. The output of the low pressure stage of the pump is determined by the air line pressure coming from the remote regulator. A remote regulator is required to control the air pressure from the air line. The independent functioning of the low and high pressure stages of this pump can best be described as follows. At the minimum air line pressure of 40 PSI (3 BAR), the low pressure stage of the pump will deliver 480 PSI (33 BAR) hydraulic pressure (with the pump regulator turned counterclockwise to prevent air pressure from activating the high pressure stage of the pump.) At the minimum air line pressure (with the pump regulator turned clockwise to allow air pressure to reach the high pressure stage.) Always remember that the pump regulator must be turned fully counterclockwise when the pump is used to produce 1,200 PSI (83 BAR) or less.Operating InstructionsRefilling the ReservoirIf the additional fluid must be adder to the reservoir, use only approved hydraulic fluid (215 SSU @ 1000 F [380 C]). Clean the entire area around the filler plug before adding fluid to the reservoir. Remove the filler plug, and insert a clean funnel with filter. The cylinder must be fully retracted and the air supply disconnected when adding the fluid to the reservoir.Periodic CleaningIMPORTANT: The greatest single cause of failure in hydraulic pumps is dirt. Keep the pump and attached equipment clean to prevent foreign matter from entering the system.A routine should be established to keep the pump as free from dirt as possible. All unused couplers must be sealed with thread protectors. All hose connections must be free of grit and grime. Any equipment hooked up to the pump should also be kept clean. Use only approved hydraulic fluid in this unit and change as recommended (every 300 hours).ACCESSORIESGauges and accessories may not be included with the pump. However, a hydraulic gauge is strongly recommended whenever the pump is used.•The Gauge must be of the proper rating for pressure used!• Use only approved accessories, hydraulic fluid, and repair parts!Installing an In-line Air Pressure Gauge1.Remove the male fitting from the air filter and install a tee adapter, with gauge, between the hose and air filter.2.Install male fitting into the tee adapter and securely clamp the hose to the male fitting.Installing an In-line Hydraulic Pressure Gauge1.Remove the thread protector from the hydraulic outlet port and inspect the threads and fittings for signs of wear.2.Install a tee adapter, with gauge, between the hose coupling and the pump hydraulic outlet port.3.Tighten all connections securely! DO NOT OVERTIGHTEN HOSE CONNECTIONS.Fire-Resistant Hydraulic FluidFlame Out 200TM fire-resistant hydraulic fluid is compatible with all AME hydraulic equipment. The use of this fluid does not require the changing of seals in any AME pump or cylinder and is available through your local Hydraulic Fluid Distributor.Operating InstructionsPREVENTIVE MAINTENANCEIMPORTANT: • Any repair or servicing that requires dismantling the pump must be performed on a dirt-free environment by qualified technician.• Dispose of machine and fluids properly.LubricationFor Hand/Foot, Manual Valve, and Remote Control Operated Pumps:If the pump is operated on a continuous duty cycle for extended periods, the manufacturer recommends installing an automatic air line oiler in the air inlet line as close to the pumping unit as possible. Set the unit to feed approximately one drop of oil per minute into the system. Use SAE grade oil, 5W to 30W.For Tandem Pumps:These models have an integral air pressure regulator, air filter and lubricator. Set the lubricator to feed one drop of oil per minute to the system. Use SAE grade oil, 5W to 30W. For serving the air regulator, lubricator and filter system see the operating and service instructions provided.Bleeding Air from the SystemDuring the first moments of operation or after prolonged use, a significant amount of air may accumulate within the hydraulic system. This entrapped air may cause the cylinder to respond slowly or behave in an unstable manner. To remove the air, run the system through several cycles (extending and retracting the cylinder) free of any load. The cylinder must be at lower level then the pump to allow air to be released through the pump reservoir.Inspecting the Hydraulic Fluid LevelCheck the fluid level in the reservoir after every 10 hrs of use. Drain and replenish the reservoir with Approved hydraulic fluid after every 300 hours of use approximately.For Pumps with 105 cubic Inch (1.7 l) reservoir capacity:The fluid level should be inch (12.7 mm) from the filler/vent cap with all cylinders retractedFor pumps with a 2 gallon (7.6 l) reservoir capacity:The fluid level should 1-3/4 inch (44.5 mm) from the filler/vent cap with all cylinders retracted.Draining and Flushing the ReservoirIMPORTANT: Wipe the pump exterior completely clean before attempting this procedure!1.Remove the screws that fasten the pump assembly to the reservoir. Remove the pump assembly fromthe reservoir. Do not damage the gasket, filler or safety valve.2.Drain the reservoir of all fluid and refill half full with clean hydraulic fluid. Rinse the filter clean.3.Place the pump assembly back onto the reservoir, and secure with two of the machine screwsassembled in opposite corners of the housing.4.Run the unit for several minutes. Use the same method described in the section titled ‘’Priming thePump Unit.’’5.Drain and clean the reservoir once more.6.Refill the reservoir with Approved hydraulic fluid and replace the pump assembly (with gasket) on thereservoir pounds (2.8 to 3.4 N•m); for 2 gallon (7.6 l) reservoirs, torque to 35 to 45 inch pounds (4.0 to 5.0 N•m)IMPORTANT: Drain and clean the other hydraulic system components (hoses, cylinders, etc.) before reconnecting them to the pump. This will prevent contaminated fluid from entering the pump again.Operating InstructionsOPERATOR TROUBLESHOOTING GUIDEIf this guide does not resolve your pump problem,Contact an authorized hydraulic service center or a company headquarters listed on back sheet 5 of 5.PROBLEMS CAUSE SOLUTIONPump reciprocates but no fluid 1. Low Fluid Level 1. Add fluid as instructed innot PreventiveSection.Maintenancewill(cylinderfluiddeliveryextend) 2. Pump not primed. 2. Prime pump as instructed inSection.Operation3. Fluid intake filter contaminated 3. Remove reservoir and clean intakeand reinstall.Low fluid delivery (cylinder 1. Inadequate air supply 1. a. Should be 20 CFMextends slowly) a. Check air input supply. (.57 M3/min.) Minimum.b. Contamination, check air side b. Clean and reassemble.of pump (plugged air inletscreen.)reservoirRemovecleana.and2.2.HydraulicFailurea. Check the fluid inlet filter for intake filter and reinstall.contamination. b. Bleed the system asb. Air in hydraulic system. described in the PreventivesectionMaintenancePump will not build to maximum 1. Check the air supply. 1. 100 PSI (7 BAR) is required tomaximumleakage) obtainpressure.(visiblepressurenoaccordinginstructions2.toAdjust2.Pressureregulatorimproperlyadjusted (if so equipped). in Operation sectionPump builds pressure but will not 1. Check the hydraulic connections 1. Refit or repair as needed.hold system pressure and other system componentsfor leakage, including 3 way/4soequipped).(ifvalvewayPump will continue to run slowly 1. Output pressure equal to or 1. Normal Operation.even after desired pressure is higher than relief valve settingor 2.Repairorreplace.valve3-way/4-wayreached2.Defectiveleaking.othercomponentsExcess of oil spray from muffler 1. Air lubricator is set too rich ( if so 1. Set at one drop per minute.equipped).。

2024—2025学年度第一学期期末学业水平诊断高三英语试题说明：本试卷由四个部分组成，共12页，满分150分，考试用时120分钟。

请把答案全部涂写在答题卡上，考试结束后，只交答题卡。

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听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。

每段对话仅读一遍。

1．What will the man probably do next?A．Watch TV． B．Go out for dinner． C．Do his homework．2．How did the woman lose weight?A．By eating special Meals．B．By going on a diet．C．By doing exercise occasionally．3．Which foreign language does Mr．Smith do well in?A．French． B．Japanese． C．Spanish．4．What does the woman complain about?A．The desk． B．The messy room． C．The heavy box．5．What color is the woman’s dress?A．Red． B．Blue． C．Black．其次节(共15小题；每小题1.5分，满分22.5分)听下面5段对话或独白。

每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。

听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。

In the future, with the continuous development of technology, relay protection will continue to develop in the direction of high-speed, highprecision, intelligence and networking. It will also be more widely used in power systems, energy transportation fields and other fields.
Development history and trends of relay protection
Development history
Development trends
Relay protection technology has developed rapidly with the development of power systems. In the early days, it was mainly based on mechanical and electrical principles, but now it has developed into an integrated technology system that combines computer, communication, control and other technologies.
02
Principle and Technology of Relay Protection
Relay protection principle
Protection of power system: The power system is a very complex system, including power generation, transmission and distribution. Due to the long distance and high voltage of the power system, it is necessary to use relay protection to protect the power system.

2023-2024学年人教版全国高中英语同步练习学校：__________ 班级：__________ 姓名：__________ 考号：__________注意事项：1．答题前填写好自己的姓名、班级、考号等信息;2．请将答案正确填写在答题卡上;一、七选五（本大题共计13小题，每题10分，共计130分）1. 阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

选项中有两项为多余选项。

Bullying（欺凌）can take a variety of forms, from words—being made fun of or called hurtful names—to actions—being kicked or pushed—as well as indirect forms, such as being excluded from social groups. Bullying is clearly unpleasant, and can make the child experiencing it feel unworthy and depressed.（1）________ Bullied pupils are more likely to experience difficulties with interpersonal relationships as adults.Until recently, not much was known about the topic, and little help was available to teachers to deal with bullying.（2）________ "There is no bullying at this school" has been a common response, almost certainly untrue. Fortunately more schools are now saying: "There is not much bullying here, but when it occurs we have a clear policy for dealing y with it. "（3）________ The policy ought to say clearly what is meant by bullying, and give specific guidelines on what will be done if it occurs, what records will be kept, who will be informed, what punishments will be employed.（4）________ There are ways of dealing with the topic through the curriculum（课程）, using video, drama and literature. These are useful for raising awareness, and can best be employed in early stages of development, while the school is starting to discuss the issue of bullying. But curriculum work alone may only have short-term effects.（5）________A. It should be an addition to policy work.B. Other actions can be taken to support the policy.C. The reduction in bullying is surely a worthwhile goal.D. Perhaps as a result, schools would often deny the problem.E. Evidence suggests that a key step is to develop a policy on bullying.F. Thus it will be extremely difficult to tell bullying from playful fighting.G. In extreme cases it can even lead to suicide, though this is thankfully rare.【答案】G, D, E, B, A【解析】（1）G 根据后面Bullied pupils are more likely to experience difficulties with interpersonal relationships as adults.受欺负的学生成年后更容易在人际关系方面遇到困难。

上海市崇明区2025年高考诊断性测试英语试题考生请注意：1．答题前请将考场、试室号、座位号、考生号、姓名写在试卷密封线内，不得在试卷上作任何标记。

2．第一部分选择题每小题选出答案后，需将答案写在试卷指定的括号内，第二部分非选择题答案写在试卷题目指定的位置上。

3．考生必须保证答题卡的整洁。

考试结束后，请将本试卷和答题卡一并交回。

第一部分（共20小题，每小题1.5分，满分30分）1．The government has been under growing pressure to ______ the causes of air pollution as smog frequently smothers the country’s large cities.A．release B．scheduleC．maintain D．address2．Parents need to encourage kids to develop their potential _____ putting too much pressure on them.A．without B．besidesC．by D．for3．The event that _________ in my memory happened one morning in 1983 when I was 14 years old. It has never escaped.A．stood out B．stands outC．would stand out D．has stood out4．The shocking news made me realize ________ terrible problems we would face.A．what B．howC．that D．why5．---Do you think Peter is a good partner?--- Not really! There are some things that are not easy to ________ , and his laziness is one.A．put aside B．put up withC．think of D．get along with6．-- Alison, I'm sorry. I can't come to the wedding with you tomorrow morning. -- ________?-- My grandma was severely ill, so I have to stay in the hospital to look after her.A．How is it B．How come C．So what D．What's the problem7．—You were not listening；what troubled you?—I my coming math exam．A．am thinking about B．was thinking about C．had thought about D．will think about8．goes up must come down, and gasoline prices are coming down fast in some parts of America. A．WhereB．WhatC．WhichD．That9．— What great changes have taken place in our city in the last few years!— Indeed, many high buildings have _______all over the city.A．wound up B．sprung up C．held up D．made up10．Much disappointed as he is in the job interview, he still keeps his confidence.A．to have failed B．failedC．having failed D．failing11．The government has taken some measures to solve the shortage of electricity, but it will be some time_________ the situation improves.A．since B．whenC．unless D．before12．If the new safety system _______ to use, the accident would never have happened.A．had been put B．were put C．should be put D．would be put13．---My son is addicted to computer games. He is hopeless，isn't he？---Yes，_____________he is determined to give up and start all over.A．if B．unlessC．though D．so14．— Mary looks hot and dry.— So ________ you if you had a high fever.A．could B．would C．may D．must15．Thanks to Mrs Smith, the father and the son eventually ______after ten years’ cold relationship between them. A．took up B．picked up C．made up D．turned up16．Our dream is to _______ a World Cup that makes you, your grandchildren and everyone in football really proud. A．stage B．chairC．found D．watch17．Last year I applied to Princeton University．I ____ they would say yes—but they did, and now here I am．A．never think B．am never thinkingC．have never thought D．never thought18．I felt like giving up. I probably ________，but my Dad whispered, “Come on! Y ou can make it.”A．would have B．would C．should D．should have19．______ what had happened, they knew I would struggle and simply wanted to help because it was the right thing to do.A．Hearing B．To have heard C．Having heard D．Heard20．Nowadays, more and more Chinese homes have the technology and equipment ______ to do online shopping.A．needed B．needingC．need D．to need第二部分阅读理解（满分40分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

Ideally, work on an electrical system can only be 100% safe if that system is totally de-energized while work is being performed.In many instances, such as inthe “process” industries where facilities are required to operate continuously for “24/7”, a totally de-energized system may not always be possible for these situations. The electrical system may need to be energized to conduct maintenance or to perform trouble-shooting tasks. The steps involved in confirming that an electrical circuit is indeed de-energized, may also put the worker at risk.Employees that work in the electrical inspection industryfind that they may be exposedto shock and arc flash hazards while conducting the necessary inspections of electrical systems. To help address this, the 2011 Edition of the NEC [1] has a new set of solutions for addressing arc flash energy reduction in circuit breaker applications, as follows per Article 240.87:240.87 Non-instantaneousTrip. Where a circuit breaker isused without an instantaneoustrip, documentation shall beavailable to those authorizedto design, install, operate orinspect the installation asto the location of the circuitbreaker(s).W here a circuit breakeris utilized without an instantaneous trip, one of the following or approved equivalent means shall be provided:(1) Zone-selective interlocking(2) Differential relaying(3) Energy-red ucingmaintenance switching withlocal status indicatorI nformational Note: Anenergy-reducing maintenanceswitch allows a worker to seta circuit breaker trip unit to ‘nointentional delay’ to reducethe clearing time while theworker is working within anarc-flash boundary as definedin NFPA 70E, 2009, Standardfor Electrical Safety in theWorkplace, and then to set thetrip unit back to a normal settingafter the potentially hazardouswork is complete.In order to maintain selectivecoordination in some applications,an upstream main circuit breakermay be chosen that does not havean instantaneous trip function. Inthese cases, if this main circuitbreaker were to experience a shortcircuit condition, it would remainclosed for its preset delay time.And the longer it takes to trip, thehigher the arc flash risk.Therefore, the idea behindthe IBEW proposal and thesubsequent new NEC requirementis that in cases where the circuitbreaker is used without aninstantaneous trip, an alternatemeans shall be provided toreduce the fault clearing timewhile a worker may be within anarc flash boundary of that circuitbreaker. Many circuit breakermanufacturers have designs wherethe instantaneous function may beturned “OFF”. In cases where theinstantaneous trip is turned “OFF”,the circuit breaker will not trip viaits instantaneous function, andper the new NEC requirement, analternate means for reducing theclearing time shall be provided.The three devices andtechnologies listed in this newNEC requirement have beenavailable in the electrical industryfor several years now. While aZone Selective Interlocking (ZSI )scheme will provide a faster triptime than the pre-set short delay(or ground-fault) trip time, itsresponse is typically slower thanboth the “no intentional delay” ofthe Instantaneous trip times, andthe trip times of Energy-ReducingMaintenance Switching devices.Depending on the circuit breakermanufacturer, ZSI trip timesare in the range of 80-130ms,Instantaneous trip times aretypically 20-80ms, and Energy-Reducing Maintenance Switchingdevices are as fast as less than50ms.Figure 1 shows a simple relativecomparison of the tripping timesfor the various electronic circuitbreaker trip functions – Short timedelay, ZSI, Instantaneous, andEnergy Maintenance Switching.The overlapping of the time bandsindicate the typical variation tobe expected between differenttypes of circuit breaker designs(Molded Case versus Power circuitbreakers), and between differentcircuit breaker manufacturers.What’s the purpose of Energy-Reducing MaintenanceSwitchingIn situations where it may beimpractical to de-energize theelectrical equipment, in addition toemploying all the other appropriate“traditional” solutions for arc flashreduction, it may be desirableto use an Energy-ReducingMaintenance Switch to furtherreduce the tripping time andsubsequent arc flash hazard topersonnel working on downstreamenergized equipment.An “Energy Reducing MaintenanceSwitch” is a device that has beendesigned specifically to be usedby personnel only while theyare required to perform work onenergized electrical equipment,as permitted by the NFPA 70E,Standard for Electrical SafetyRequirements for EmployeeWorkplaces [2]. This device is notintended to be continuously active.The inclusion of this optionaldevice as part of a system’soverall arc flash reduction strategyprovides enhanced personnelprotection. Once activated, theEnergy-Reducing MaintenanceSwitch option provides a lockableswitch feature that should beincluded in Lock Out/Tag Out(LOTO) safety procedures. Oncethe work has been completed, theEnergy-Reducing MaintenanceArc Flash Energy Reduction T echniquesEnergy-Reducing Maintenance SwitchingFigure 1 – Relative Clearing Times for electronic Circuit Breakertrip functionsSwitch is de-activated and the system returned to its optimal protection state.How Energy-ReducingMain ten an ce Switchin g Works The basic Energy-Reducing Maintenance Switching designis one that incorporates an additional electronic control circuit that may be separate from the normal instantaneous or short time protection circuits in the trip unit. The purpose of the separate control circuit is to allow the electrical worker, on demand,to ‘switch-in’ a system that will trip the over-current protective device in a time that will provide the minimum possible arcingtime should an arc flash incident occur while energized work isbeing performed on that device. The tripping times that can be achieved by the Energy-Reducing Maintenance Switching schemes may be faster or may be slower than the “Instantaneous”trip times of the trip unit, depending on the circuit breaker manufacturer.Once the Energy-Reducing Maintenance Switching schemeis turned to an active state, 1) A local indicator is turned ON, 2) The local protection settings are over-ridden by the Energy-Reducing Maintenance Switching settings. Manufacturers of Energy-Reducing Maintenance Switching schemes provide appropriate written instructions for the safe installation and testing of the schemes. Once qualified personnel completesthe energized electrical work, the Energy-Reducing Maintenance Switching scheme is switched OFF and the system returned to its normal operating state.Energy-Reducing Maintenance Switching as an Arc Reduction SolutionThere are currently a few different basic types of Energy-Reducing Maintenance Switching schemes available today.The selection of the settings for the Energy-Reducing Maintenance Switching may be integral to the trip unit on the circuit breaker, or done by optional remote settings via a remote switch contact operation, and also via various communicating devices [3]. One such design scheme providesflexibility in the selection of thepick-up level for tripping. The pick-up may simply be set one timeonly at the lowest, most sensitivelevel, or it may be set in relation tothe calculated arcing fault current,the normal load current, and anypossible transient currents fromapplication specific transformerinrush or a motor starting [4]. AnEnergy-Reducing MaintenanceSwitching pick-up setting is thenselected that is above the totalload plus transient currents, butbelow the calculated minimumarcing current. This setting allowsthe device to trip at the expectedarcing current, but avoids nuisancetripping from transient loadcurrents.Table 1 shows the arc flashincident energy is reduced from10.7 cal/ cm2, by approximately80%, to 2.2 cal/ cm2 by use ofthis Energy-Reducing MaintenanceSwitching scheme [4].S ystem data: 480V Systemvoltage; Switchgear, 24”approach boundary, SolidlyGrounded.The total clearing time for thisseparate Energy-ReducingMaintenance Switchingscheme may be faster than theInstantaneous trip time of theelectronic trip unit, as shown inFigure 2. As a result of its veryfast tripping time, this Energy-Reducing Maintenance Switchingdesign will yield lower arc flashenergy than even if the circuitbreaker tripped via the normal“Instantaneous” trip response.It’s the benefit of this veryfast tripping response that the2011 NEC requires this type oftechnology to further enhanceworker safety in hazardous arcflash circumstances.An alternate Energy-ReducingMaintenance Switching designscheme is also available in asimpler configuration. With thiscircuit breaker manufacturer [5],the Energy-Reducing MaintenanceSwitching scheme is switched ONor OFF as needed, with the localindicator present as required bythe 2011 NEC. This design doesnot provide a means separatefrom the protection settings forselecting a pick-up level for theEnergy-Reducing MaintenanceSwitching. Instead, it uses theexisting Short-time delay pick-up setting on the trip unit. ForEnergy-Reducing MaintenanceSwitching, the Short-time currentpick-up setting must be set below85% of the calculated minimumarcing current at the systemlocation where it is expected toprovide “fast” interruption [5]. Atthe completion of the energizedelectrical work, in addition toswitching OFF the Energy-Reducing Maintenance Switchingscheme, this short time pick-upsetting must be also returned toits previous protection setting[5].When activated, this type ofEnergy-Reducing MaintenanceSwitching design also provides afaster tripping time (approximately80mS) than normal short delaytripping, but will not be faster thanthe normal instantaneous trip timeof the circuit breaker [5].Are all Energy-ReducingMaintenance Switching devicesEqual?Since the primary purpose of anEnergy-Reducing MaintenanceSwitching device is to providevery fast tripping times duringan arc flash incident, a keyparameter for selecting betweenmanufacturers of these devices,is the device’s total clearing timein the event of an arcing fault.While several manufacturers offerEnergy-Reducing MaintenanceSwitching designs that meetthe 2011 NEC requirements, theperformance of their designsare not all equivalent – the totalclearing times of the variousdesign solutions are different. Forsome manufacturers, the totalclearing time provided by theirEnergy-Reducing MaintenanceSwitching device is even fasterthan the normal “no intentionaldelay” instantaneous trip time. Forsome other manufacturers, theirtotal clearing time may be slowerthan their instantaneous triptimes. To ensure that the devicewith the fastest total clearingtime is chosen for an arc flashreduction application, the electricalsystem designer should consultthe manufacturer’s published datato identify and verify the totalclearing time performance of eachEnergy-Reducing MaintenanceSwitching device option.References[1] N ational Fire Protection Association,NFPA 70, National Electrical Code,2011 Edition[2] N FPA 70E, Standard for ElectricalSafety in the Workplace,2009 Edition[3] J ud Meyer, “Arc Flash Mitigationwith Entellisys”, GE IndustrialSolutions White Paper, October2009.[4] E aton Corporation, “Arc-FlashReduction Maintenance SwitchApplication and Installation”,Instruction Literature, May 2005.[5] S QUARE-D by Schneider Electric,“Alternate Maintenance Setting(AMS) Switch”, Instruction Bulletin,Sept 2009.Eaton CorporationElectrical Sector1000 Cherrington ParkwayMoon Township, PA 15108United States877-ETN-CARE (877.386.2273)/electricalsafety©2011 Eaton CorporationAll Rights ReservedPrinted in USAPublication No. TP08324002EFebruary 2011Eaton is a registered trademarks ofEaton Corporation.All other trademarks are property oftheir respective owners.Table 1 – Effect of an Energy-Reducing Maintenance Switching onIncident Arc Energy [4]Figure 2 – Time-Current Curves showing faster Trip Time withEnergy-Reducing Maintenance Switching [4].。

英语作文-如何提供个性化航班推荐服务，满足游客需求Providing personalized today's fast-paced world, travelers increasingly seek personalized experiences tailored to their preferences and needs. One area where such customization can significantly enhance the travel experience is in flight recommendations. To meet the demands of modern travelers, airlines and travel service providers must leverage advanced technology and data analytics to offer personalized flight recommendations that not only simplify the booking process but also enhance the overall journey.A key aspect of providing personalized flight recommendations is the collection and analysis of vast amounts of data. This includes data on traveler preferences, past travel history, booking behavior, and even social media activity. By harnessing this data, travel platforms can create detailed profiles for each user, enabling them to understand individual preferences and predict future needs. For instance, a frequent traveler might prefer direct flights with minimal layovers, while another might prioritize flights with in-flight entertainment or specific meal options. Advanced algorithms and machine learning models can analyze these profiles to suggest flights that best match the traveler’s preferences.Moreover, integrating real-time data is crucial in enhancing the personalization of flight recommendations. This includes live updates on flight status, weather conditions, and even seat availability. By combining historical data with real-time information, travel platforms can offer dynamic recommendations that are not only personalized but also relevant at the moment of booking. For example, if a storm is approaching, the system could alert the traveler and suggest alternative flights or routes to ensure a smoother journey.In addition to data analytics, user interface design plays a pivotal role in delivering a seamless and personalized experience. A well-designed platform should be intuitive,allowing users to easily navigate through personalized options without feeling overwhelmed. Features such as personalized dashboards, where travelers can see flight suggestions based on their preferences and past behavior, enhance user engagement. Additionally, incorporating visual elements like personalized itineraries, detailed flight comparisons, and real-time status updates can make the booking process more interactive and user-friendly.Another important component is the use of AI-powered chatbots and virtual assistants. These tools can provide instant, personalized recommendations and answer queries in real time, enhancing customer service and satisfaction. For instance, a chatbot could suggest the best flight options based on the traveler’s profile and current conditions, or provide information on baggage policies and seat upgrades. This not only speeds up the booking process but also adds a layer of convenience and support that is tailored to the traveler’s needs.Furthermore, partnerships with other service providers can enrich the personalization experience. Collaborating with hotels, car rental services, and local attractions allows travel platforms to offer bundled deals and recommendations that are customized to the traveler’s itinerary. For example, after booking a flight, a traveler might receive personalized suggestions for accommodation and activities at their destination, creating a cohesive and hassle-free travel experience. This holistic approach not only enhances convenience but also increases the value of the travel package, making it more attractive to the traveler.Lastly, continuous feedback and iteration are essential in refining personalized flight recommendations. By gathering and analyzing user feedback, travel platforms can continually improve their algorithms and user experience. This iterative process ensures that the recommendations remain relevant and effective, adapting to changing preferences and new trends in travel. 。