Remotesensingoft_省略_menCityofSEChina_
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2022年考研考博-考博英语-中国科学院考试全真模拟易错、难点剖析AB卷(带答案)一.综合题(共15题)1.单选题Parents often fall into the trap of offering other food in order to() the child to eat. 问题1选项A.temptB.manipulateC.incenseD.escort【答案】A【解析】考查动词辨析。
tempt “吸引,诱使”;manipulate “操作,操控”;incense “使激怒”;escort“护送,陪同”。
句意:家长们常常陷入困境,通过别的食物来吸引孩子好好吃饭。
选项A符合句意。
2.翻译题Directions: Read the following text carefully and then translate the underlined segments into Chinese. Write your Chinese version in the proper space on your Answer Sheet.In the U.S., citizens tend to rely on electronic media such as TV rather than print media. TV news tends to provide numerous visuals and abbreviated textual information. (1) Although TV news stories pitch “on-the-scene reporting”, and other eye-catching images to viewers, the actual stories are generally so brief that were the reports transcribed into newspaper copy, no single story would have enough text to cover a third of a page. It is remarkable to consider how little information is conveyed between all the exciting visuals. (2) It is also remarkable to stop and think about how inadequately informed citizens may be if their primary source of political knowledge is the picture-rich and data-poor TV evening news. Moreover, because U.S. media companies are primarily privately owned, (3) media professionals are under pressure to present news in an entertaining way in order to expand their audiences and corresponding advertising revenues. Large audiences create higher profits from advertising sales. With a few exceptions, U.S. TV and radio stations are like other businesses: They need to generate money to cover operating costs and make profits. If media professionals are convinced that viewers want entertaining news rather than in-depth details, this assumption affects the kind of news they produce. Not surprisingly, political scientists have found that news coverage of election campaigns tends to focus on the personal lives of candidates rather than on issues, and (4) when issues are reported the emphasis is often on the immediate and most dramatic implications of the issues, not on the historical, long-term, or global dimensions of those issues.At the same time, insofar as television and Internet-based news must be generated quickly, time pressures impede extensive independent investigations. Because U.S. citizens conceptualize news as something occurring by the hour or minute, U.S. media professionals are often putting together news stories under severe time restraints. (5) Some analysts believe that this increases the tendency of reporters to get information from official sources rather than from the reporters’ own independent investigations of newsworthy events. Think about this issue from the standpoint of reporters and editors. If you are a reporter assigned the task of doing a story on a state’s new prison system, for example, you will find it is quicker and easier to get a governor’s press release on the new prison than it is to go to libraries, data banks, and university research centers to investigate the topic on your own. This does not suggest that investigative journalism never occurs; rather, many scholars believe that time pressures tend to encourage the use of information provided by official sources (for example, political leaders and their press secretaries) rather than the collection of facts through ongoing independent research.【答案】【参考译文】(1)虽然电视新闻故事多推崇“现场报道”或者其他吸人眼球的形象,但是实际上这些故事通常都很简短,要是把这些报道转写成报纸版面的话,它们任何一个都占不了三分之一的版面。
2017年考研英语一试题及答案解析Section ⅠUse of EnglishDirections:Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)Could a hug a day keep the doctor away? The answer may be a resounding "yes!"_____〔1〕helping you feel close and _____〔2〕to people you care about, it turns out that hugs can bring a _____〔3〕of health benefits to your body and mind. Believe it or not, a warm embrace might even help you _____〔4〕getting sick this winter.In a recent study _____〔5〕over 400 healthy adults, researchers from Carnegie Mellon University in Pennsylvania examined the effects of perceived social support and the receipt of hugs_____〔6〕the participants' susceptibility to developing the common cold after being_____〔7〕to the virus. People who perceived greater social support were less likely to come_____〔8〕with a cold, and the researchers_____〔9〕that the stress-reducing effects of hugging _____〔10〕about 32 percent of that beneficial effect. _____〔11〕among those who got a cold, the ones who felt greater social support and received more frequent hugs had less severe_____〔12〕."Hugging protects people who are under stress from the _____〔13〕risk for colds that's usually _____〔14〕with stress," notes Sheldon Cohen, a professor of psychology at Carnegie, Hugging " is a marker of intimacy and help _____〔15〕the feeling that others are there to help_____〔16〕difficulty."Some experts_____〔17〕the stress-reducing, health-related benefits of hugging to the release of oxytocin, often called "the bonding hormone"_____〔18〕it promotes attachment in relationships, including that between mothers and their newborn babies. Oxytocin is made primarily in the central lower part of the brain, and some of it is released into the bloodstream. But some of it _____〔19〕in the brain, where it _____〔20〕mood, behavior and physiology.1. A.Besides B.Unlike C.Throughout D.Despite2. A.equal B.restricted C.connected D.inferior3. A.view B.host C.lesson D.choice4. A.avoid B.forget C.recall D.keep5. A.collecting B.affecting C.guiding D.involving6. A.on B.in C.at D.of7. A.devoted B.attracted C.lost D.exposed8. A.along B.across C.down D.out9. A.imagined B.denied C.doubted D.calculated.served B.restored C.explained D.required.Thus B.Still C.Rather D.Even.defeats B.symptoms C.errorsD.tests.highlighted B.increased C.controlled D.minimized.presented B.equipped C.associated D.compared.assess B.generate C.moderate D.record16. A.in the name of B.in the form of C.in the face of D.in the way of .attribute B.commit C.transfer D.return.unless B.because C.though D.until.remains B.emerges C.vanishes D.decreases .experiences B.combines C.justifies D.influencesSection ⅡReading ComprehensionPart ADirections:Read the following four texts. Answer the questions below each text by choosing A, B, C or D. Mark your answers on the ANSWER SHEET. 〔40 points〕Text 1First two hours, now three hours —this is how far in advance authorities are recommending people show up to catch a domestic flight, at least at some major U.S. airports with increasingly massive security lines.Americans are willing to tolerate time-consuming security protocols in return for increased safety. The crash of EgyptAir Flight 804, which terrorists may have downedover the Mediterranean Sea, provides another tragic reminder of why. But demanding toomuch of air travelers or providing too little security in return undermines public supportfor the process. And it should: Wasted time is a drag on Americans' economic and private lives, not to mention infuriating.Last year, the Transportation Security Administration(TSA) found in a secret check that undercover investigators were able to sneak weapons — both fake and real — past airport security nearly every time they tried. Enhanced security measures since then, combinedwith a rise in airline travel due to the improving economy and low oil prices, have resulted in long waits at major airports such as Chicago's O'Hare International. It is notyet clear how much more effective airline security has become —but the lines are obvious.Part of the issue is that the government did not anticipate the steep increase in airline travel, so the TSA is now rushing to get new screeners on the line. Part of the issue is that airports have only so much room for screening lanes. Another factor may be that more people are trying to overpack their carry-on bags to avoid checked-baggage fees, thoughthe airlines strongly dispute this.There is one step the TSA could take that would not require remodeling airports or rushing to hire: Enroll more people in the PreCheck program. PreCheck is supposed to bea win-win for travelers and the TSA. Passengers who pass a background check are eligible to use expedited screening lanes. This allows the TSA to focus on travelers whoare higher risk, saving time for everyone involved. TSA wants to enroll 25 million peoplein PreCheck.It has not gotten anywhere close to that, and one big reason is sticker shock: Passengers must pay $85 every five years to process their background checks. Since the beginning, this price tag has been PreCheck's fatal flaw. Upcoming reforms might bring the price to a more reasonable level. But Congress should look into doing so directly, by helping to finance PreCheck enrollment or to cut costs in other ways.The TSA cannot continue diverting resources into underused PreCheck lanes while most of the traveling public suffers in unnecessary lines. It is long past time to make the program work.21.The crash of EgyptAir Flight 804 is mentioned to[A] explain American’s tolerance of current security checks.[B] stress the urgency to strengthen security worldwide.[C] highlight the necessity of upgrading major U.S. airports.[D] emphasize the importance of privacy protection.22.Which of the following contributes to long waits at major airports?[A] New restrictions on carry-on bags.[B] The declining efficiency of the TSA.[C] An increase in the number of travellers.[D] Frequent unexpected secret checks.23.The word “exp edited〞(Liner 4, Para. 5) is closet in meaning to[A] quieter.[B] cheaper.[C] wider.[D] faster.24. One problem with the PreCheck program is[A] a dramatic reduction of its scale.[B] its wrongly-directed implementation.[C] the government’s reluctanc e to back it.[D] an unreasonable price for enrollment.25. Which of the following would be the best title for the text?[A] Less Screening for More Safety[B] PreCheck – a Belated Solution[C] Getting Stuck in Security Lines[D] Underused PreCheck LanesText 2“The ancient Hawaiians were astronomers,〞wrote Queen Liliuokalani, Hawaii's last reigning monarch, in 1897. Star watchers were among the most esteemed members of Hawaiian society. Sadly, all is not well with astronomy in Hawaii today. Protests haveerupted over construction of the Thirty Meter Telescope (TMT), a giant observatory that promises to revolutionize humanity's view of the cosmos.At issue is the TMT's planned location on Mauna Kea, a dormant volcano worshiped by some Hawaiians as the piko, that connects the Hawaiian Islands to the heavens. But Mauna Kea is also home to some of the world's most powerful telescopes. Rested in the Pacific Ocean, Mauna Kea's peak rises above the bulk of our planet's dense atmosphere, where conditions allow telescopes to obtain images of unsurpassed clarity.Opposition to telescopes on Mauna Kea is nothing new. A small but vocal group of Hawaiians and environmentalists have long viewed their presence as disrespect far sacred land and a painful reminder of the occupation of what was once a sovereign nation. Some blame for the current controversy belongs to astronomers. In their eagerness to build bigger telescopes, they forgot that science is not the only way of understanding the world. They did not always prioritize the protection of Mauna Kea's fragile ecosystems or its holiness to the islands' inhabitants. Hawaiian culture is not a relic of the past;it is a living culture undergoing a renaissance today.Yet science has a cultural history, too, with roots going back to the dawn of civilization. The same curiosity to find what lies beyond the horizon that first brought early Polynesians to Hawaii's shores inspires astronomers today to explore the heavens. Calls to disassemble all telescopes on Mauna Kea or to ban future development there ignore the reality that astronomy and Hawaiian culture both seek to answer big questions about who we are, where we come from and where we are going. Perhaps that is why we explore the starry skies, as if answering a primal calling to know ourselves and our true ancestral homes.The astronomy community is making compromises to change its use of Mauna Kea. The TMT site was chosen to minimize the telescope’s visibility around the island and to avoid archaeological and environmental impact. To limit the number of telescopes on Mauna Kea, old ones will be removed at the end of their lifetimes and their sites returned to a natural state. There is no reason why everyone cannot be welcomed on Mauna Kea to embrace their cultural heritage and to study the stars.26. Queen Liliuokalani’s remark in Paragraph 1 indicates[A] her conservative view on the historical role of astronomy.[B] the importance of astronomy in ancient Hawaiian society.[C]the regrettable decline of astronomy in ancient times.[D] her appreciation of star watchers’ feats in her time.27. Mauna Kea is deemed as an ideal astronomical site due to[A] its geographical features.[B] its protective surroundings.[C] its religious implications.[D] its existing infrastructure.28. The construction of the TMT is opposed by some locals partly because[A] it may risk ruining their intellectual life.[B] it reminds them of a humiliating history.[C] their culture will lose a chance of revival.[D] they fear losing control of Mauna Kea.29. It can be inferred from Paragraph 5 that progress in today’s astronomy[A] is fulfilling the dreams of ancient Hawaiians.[B] helps spread Hawaiian culture across the world.[C] may uncover the origin of Hawaiian culture.[D] will eventuall y soften Hawaiians’ hostility.30. The author’s attitude toward choosing Mauna Kea as the TMT site is one of[A] severe criticism.[B] passive acceptance.[C] slight hesitancy.[D] full approval.Text 3Robert F. Kennedy once said that a country's GDP measures “everything except that which makes life worthwhile.〞With Britain voting to leave the European Union, and GDP already predicted to slow as a result, it is now a timely moment to assess what he was referring to.The question of GDP and its usefulness has annoyed policymakers for over half a century. Many argue that it is a flawed concept. It measures things that do not matter and misses things that do. By most recent measures, the UK’s GDP has been the envy of the Western world, with record low unemployment and high growth figures. If everything was going so well, then why did over 17 million people vote for Brexit, despite the warnings about what it could do to their country’s economic prospects?A recent annual study of countries and their ability to convert growth into well-being sheds some light on that question. Across the 163 countries measured, the UK is one of the poorest performers in ensuring that economic growth is translated into meaningful improvements for its citizens. Rather than just focusing on GDP, over 40 different sets of criteria from health, education and civil society engagement have been measured to get a more rounded assessment of how countries are performing.While all of these countries face their own challenges, there are a number of consistent themes. Yes, there has been a budding economic recovery since the 2008 global crash, but in key indicators in areas such as health and education, major economies have continued to decline. Yet this isn’t the case with all countries. Some relatively poor European countries have seen huge improvements across measures including civil society, income equality and environment.This is a lesson that rich countries can learn: When GDP is no longer regarded as the sole measure of a country’s success, the world looks very different.So what Kennedy was referring to was that while GDP has been the most common method for measuring the economic activity of nations, as a measure, it is no longerenough. It does not include important factors such as environmental quality or education outcomes – all things that contribute to a person's sense of well-being.The sharp hit to growth predicted around the world and in the UK could lead to a decline in the everyday services we depend on for our well-being and for growth. But policymakers who refocus efforts on improving well-being rather than simply worrying about GDP figures could avoid the forecasted doom and may even see progress.31. Robert F. Kennedy is cited because he[A]praised the UK for its GDP.[B]identified GDP with happiness.[C]misinterpreted the role of GDP.[D]had a low opinion of GDP.32. It can be inferred from Paragraph 2 that[A]the UK is reluctant to remold its economic pattern.[B]the UK will contribute less to the world economy.[C]GDP as the measure of success is widely defied in the UK.[D]policymakers in the UK are paying less attention to GDP.33. Which of the following is true about the recent annual study?[A]It excludes GDP as an indicator.[B]It is sponsored by 163 countries.[C]Its criteria are questionable.[D]Its results are enlightening.34. In the last two paragraphs, the author suggests that[A]the UK is preparing for an economic boom.[B]high GDP foreshadows an economic decline.[C]it is essential to consider factors beyond GDP.[D]it requires caution to handle economic issues.35. Which of the following is the best for the text?[A]High GDP But Inadequate Well-being, a UK lesson[B]GDP figures, a Window on Global Economic Health[C] Robert F. Kennedy, a Terminator of GDP[D]Brexit, the UK’s Gateway to Well-beingText 4In a rare unanimous ruling, the US Supreme Court has overturned the corruption conviction of a former Virginia governor, Robert McDonnell. But it did so while holding its nose at the ethics of his conduct, which included accepting gifts such as a Rolex watch and a Ferrari Automobile from a company seeking access to government.The high court’s decision said the judge in Mr. McDonnell’s trail failed to tell a jury thatit must look only at his “officia l acts,〞or the former governor’s decisions on “specific〞and “unsettled〞issues related to his duties.Merely helping a gift-giver gain access to other officials, unless done with clear intent to pressure those officials, is not corruption, the justices found.The court did suggest that accepting favors in return for opening doors is “distasteful〞and “nasty.〞But under anti-bribery laws, proof must be made of concrete benefits, such as approval of a contract or regulation. Simply arranging a meeting, making a phone call, or hosting an event is not an “official act.〞The court’s ruling is legally sound in defining a kind of favoritism that is not criminal. Elected leaders must be allowed to help supporters deal with bureaucratic problems without fear of pr osecution of bribery. “The basic compact underlying representative government,〞wrote Chief Justice John Roberts for the court, “assumes that public officials will hear from their constituents and act on their concerns.〞But the ruling reinforces the need for citizens and their elected representatives, not the courts, to ensure equality of access to government. Officials must not be allowed to play favorites in providing information or in arranging meetings simply because an individual or group provides a campaign donation or a personal gift. This type of integrity requires will-enforced laws in government transparency, such as records of official meetings, rules on lobbying, and information about each elected leader’s source of wealth.Favoritism in official access can fan public perceptions of corruption. But it is not always corruption. Rather officials must avoid double standards, or different types of access for average people and the wealthy. If connections can be bought, a basic premise of democratic society – that all are equal in treatment by government- is undermined. Good government rests on an understanding of the inherent worth of each individual.The court’s ruling is a step forward in the struggle against both corruption and official favoritism.36. The underlined sentence(Para.1) most probably shows that the court[A] avoided defining the extent of McDonnell’s duties.[B] made no compromise in convicting McDonnell.[C] was contemptuous of McDonnell’s conduct.[D] refused to comment on McDonnell’s ethics.37. According to Paragraph 4, an official act is deemed corruptive only if it involves[A] concrete returns for gift-givers.[B] sizable gains in the form of gifts.[C] leaking secrets intentionally.[D] breaking contracts officially.38. The court’s ruling is d on the assumption that public officials are[A] allowed to focus on the concerns of their supporters.[B] qualified to deal independently with bureaucratic issues.[C] justified in addressing the needs of their constituents.[D] exempt from conviction on the charge of favoritism.39. Well-enforced laws in government transparency are needed to[A] awaken the conscience of officials.[B] guarantee fair play in official access.[C] allow for certain kinds of lobbying.[D] inspire hopes in average people.40. The author’s attitude toward the court’s ruling is[A] sarcastic.[B] tolerant.[C] skeptical.[D] supportive.Part BDirections:The following paragraphs are given in a wrong order. For questions 41-45, you are required to reorganize these paragraphs into a coherent text by choosing from the list A-G and filling them into the numbered boxes. Paragraphs B andD have been correctly placed. Mark your answers on theANSWER SHEET.〔10 points〕[A] The first published sketch, "A Dinner at Polar Walk" brought tears to Dickens's eyes when he discovered it in the pages of The Monthly Magazine From then on his sketches, which appeared under the pen name "Boz" inThe Evening Chronicle, earned him a modest reputation.[B] The runaway success of The Pickwick Papers, as it is generally known today, secured Dickens's fame. There were Pickwick coats and Pickwick cigars, and the plump, spectacled hero, Samuel Pickwick, because a national figure.[C] Soon after Sketches by Boz appeared, a publishing firm approached Dickens to write a story in monthly installments, as a backdrop for a series of woodcuts by the then-famous artist Robert Seymour, who had originated the idea for the story. With characteristic confidence, Dickens successfully insisted that Seymour's pictures illustrate his own story instead. After the first installment, Dickens wrote to the artist and asked him to correct a drawing Dickens felt, was not faithful enough to his prose. Seymour made the change, went into his backyard, and expressed his displeasure by committing suicide. Dickens and his publishers simply pressed on with a new artist. The comic novel, The Posthumous Papers of the Pickwick Club, appeared serially in 1836 and 1837 and was first published in book form in 1837.[D] Charles Dickens is probably the best-known and, to many people, the greatest English novelist of the 19th century. A moralist, satirist, and social reformer, Dickens crafted complex plots and striking characters that capture the panorama of English society.[E]Soon after his father's release from prison, Dickens got a better job as errand boy in law offices. He taught himself shorthand to get an even better job later as a court stenographer and as a reporter in Parliament. At the same time, Dickens, who had a reporter's eye for transcribing the life around him, especially anything comic or odd, submitted short sketches to obscure magazines.[F] Dickens was born in Portsmouth, on England's southern coast. His father was a clerk in the British Navy Pay office -- a respectable position, but with little social status. His paternal grandparents, a steward and a housekeeper, possessed even less status, having been servants, and Dickenslaterconcealedtheirbackground.Dicken's mother supposedly came from a more respectable family. Yet two years before Dicken's birth, his mother's father was caught stealing and fled to Europe, never to return. The family's increasing poverty forced Dickens out of school at age 12 to work in Warren's Blacking Warehouse, a shoe-polish factory, where the other working boys mocked him as "the young gentleman." His father was then imprisoned for debt. The humiliations of his father's imprisonment and his labor in the blacking factory formed Dickens's greatest wound and became his deepest could not confide them even to his wife, although they provide the unacknowledged foundation of his fiction.[G] After Pickwick, Dickens plunged into a bleaker world. InOliver Twist, he traces an orphan's progress from theworkhouse to the criminal slums of London. NicholasNickleby, his next novel, combines the darkness of Oliver Twist with the sunlight of Pickwick. The popularity of thesenovels consolidated Dickens' as a nationally and internationally celebrated man of letters.Section III TranslationDirections:Read the following text carefully and then translate the underlined segments into Chinese. Your translation should be written neatly on the ANSWER SHEET. (10 points)The growth of the use of English as the world`s primary language for international communication has obviously been continuing for several decades.(46)But even as the number of English speakers expands further there are signs that the global predominance of the language may fade within the foreseeable future.Complex international, economic, technological and culture change could start to diminish the leading position of English as the language of the world market, and UK interests which enjoy advantage from the breath of English usage would consequently face new pressures. Those realistic possibilities are highlighted in the study presented by David Graddol(47)His analysis should therefore end any self-contentedness among those who may believe that the global position of English is so stable that the young generation of the United Kingdom do not need additional language capabilities.David Graddol concludes that monoglot English graduates face a bleak economic future as qualified multilingual youngsters from other countries are proving to have a competitive advantage over their British counterparts in global companies and organizations. Alongside that,(48)many countries are introducing English into the primary-school curriculum but Britishschoolchildren and students do not appear to be gaining greater encouragement to achieve fluency in other languages.If left to themselves, such trends will diminish the relative strength of the English language in international education markets as the demand for educational resources in languages, such as Spanish ,Arabic or Mandarin grows and international business process outsourcing in other language such as Japanese, French and German, spreads.UK in invisible exports and our other education related explores earn up to &10 billion a year more. As the international education market expands, the recent slowdown in the number of international students studying in the main English-speaking countries is likely to continue, especially if there are no effective strategic policies to prevent such slippage.The anticipation of possible shifts in demand provided by this study is significant:(50) It gives a basis to all organization which seek to promote the learning and very different operating environment. That is a necessary and practical approach. In this as in much else, those who wish to influence the future must prepare for it.Section ⅣWriting51 directionsYou are to write an email to James Cook, a newly-arrived Australia professor, recommending some tourist attraction in your city. Please give reasons for your recommendation.You should write neatly on the answer sheet.Do not sign your own name at the end of the email. Use “Li Ming〞instead.Do not write the address。
1.1 What is Remote Sensing?So, what exactly is remote sensing? For the purposes of this tutorial, we will use thefollowing definition:"Remote sensing is the science (and to some extent, art) of acquiring information about the Earth's surface without actually being in contact with it. This is done by sensing and recording reflected or emitted energy and processing, analyzing, and applying that information."1.1什么是遥感?那么,究竟什么是遥感?这篇教程的目的,我们将使用下面的定义:“遥感科学(在某种程度上,艺术)获取地球表面信息,而不必接触它。
这是通过检测和记录反映或发出能量和处理,进行分析,并应用的信息。
”In much of remote sensing, the process involves an interaction between incident radiation and the targets of interest. This is exemplified by the use of imaging systems where the following seven elements are involved. Note, however that remote sensing also involves the sensing of emitted energy and the use of non-imaging sensors.在许多遥感,过程包括入射辐射和感兴趣的目标之间的相互作用。
E-mail:***********.cn Website: Tel*************©中国图象图形学报版权所有中国图象图形学报JO U R N A L O F IM A G E AND G R A PHICS中图法分类号:TP753文献标识码:A文章编号:1006-8961(2021)03-0663-11论文引用格式:Wang Y L ,Wang H Q and Xu T. 2021. Aircraft recognition of remote sensing im age* based on samp 丨e generated by CGAN. Jouma 丨 of Image and GraPhicS ,26(03) :0663-0673(王耀领,王宏琦,许滔.2021. CGAN 样本生成的遥感图像飞机识別.中国图象图形学报,26(03) :0663- 0673)[ DOI :10. 11834/jig. 200001 ]CGAN 样本生成的遥感图像飞机识别王耀领“2’3’4,王宏琦K 4,许滔1’2’3’41.中国科学院空天信息创新研究院,北京100190;2.中国科学院大学电子电气与通信工程学院,北京1_9;3.中国科学院大学,北京1_9;4.中国科学院空天信息创新研究院网络信息体系技术重点实验室,北京100190摘要:目的基于深度学习的飞机目标识别方法在遥感图像解译领域取得了很大进步,但其泛化能力依赖于大 规模数据集。
条件生成对抗网络(conditional generative adversarial network,CGAN )可用于产生逼真的生成样本以扩 充真实数据集,但对复杂遥感场景的建模能力有限,生成样本质量低。
针对这些问题,提出了一种结合CGAN 样 本生成的飞机识别框架。
方法改进条件生成对抗网络,利用感知损失提高生成器对遥感图像的建模能力,提 出了基于掩膜的结构相似性(structural similarity, SSIM)度量损失函数(masked-SSIM loss )以提高生成样本中飞 机区域的图像质量,该损失函数与飞机的掩膜相结合以保证只作用于图像中的飞机区域而不影响背景区域。
2016年北京航空航天大学翻译硕士英语真题试卷(题后含答案及解析)题型有:1. V ocabulary 2. Reading Comprehension 3. WritingV ocabulary1.This liquid is highly______; it should be kept in a tightly stopped bottle.A.volatileB.volubleC.voluptuousD.voracious正确答案:A解析:本题考查形容词词义辨析。
根据主语liquid和空后的kept in a tightly stopped bottle推断,应该是易挥发的液体放在密闭的瓶子里,故答案为volatile,意为“(液体)易挥发的”。
voluble意为“(讲话)滔滔不绝的,流利的”。
voluptuous 意为“(女子)妖娆的,丰满的,性感的”。
voracious意为“贪吃的,食量大的;(对信息、知识)渴求的,求知欲极强的”。
2.The______workroom has not been used in years.A.bereftB.bustlingC.derelictD.stricken正确答案:C解析:本题考查形容词词义辨析。
bereft意为“感到失落的;完全没有的”。
bustling意为“(地方)繁忙的,热闹的”。
derelict意为“(建筑物或土地)破旧的,弃置的”,符合has not been used in years的语义,故为答案。
stricken意为“受煎熬的;患病的;遭受挫折的;遭受……的”。
3.He refused to see anyone and remained a______all his life.A.hereticB.fugitiveC.hermitD.veteran正确答案:C解析:本题考查名词词义辨析。
heretic意为“异教徒,异端分子”。
新探索研究生英语读写教程答案微信公众号1、It’s windy outside. _______ your jacket, Bob. [单选题] *A. Try onB. Put on(正确答案)C. Take offD. Wear2、The famous writer, _____ writings for China Daily I appreciate a lot , is invited to give a speech in our university. [单选题] *A. thatB. whose(正确答案)C. whomD. who3、His understanding made a deep impression_____the young girl. [单选题] *A.on(正确答案)B.inC.forD.with4、—Where ______ you ______ for your last winter holiday?—Paris. We had a great time. ()[单选题] *A. did; go(正确答案)B. do; goC. are; goingD. can; go5、I haven’t met him _____ the last committee meeting. [单选题] *A. forB. since(正确答案)C. atD. before6、31.That's ______ interesting football game. We are all excited. [单选题] *A.aB.an(正确答案)C.theD./7、When you’ve finished with that book, don’t forget to put it back one the shelf, ____? [单选题] *A. do youB. don’t youC. will you(正确答案)D. won’t you8、The young man had decided to give up the chance of studying abroad, _____ surprised his parents a lot. [单选题] *A. whenB. whereC. which(正确答案)D. that9、--_______ do you have to do after school?--Do my homework, of course. [单选题] *A. What(正确答案)B. WhenC. WhereD. How10、He _______ getting up early. [单选题] *A. used toB. is used to(正确答案)C. is usedD. is used for11、If you do the same thing for a long time, you'll be tired of it. [单选题] *A. 试图B. 努力C. 厌倦(正确答案)D. 熟练12、48.—________ is your new skirt, Lingling?—Black. [单选题] * A.HowB.What colour(正确答案)C.WhichD.Why13、The Yangtze River is one of ()the in the world. [单选题] *A. longest riverB. longest rivers(正确答案)C. longer riverD. longer rivers14、_____how to do with the trouble of the computer, Tom had to ask his brother for help. [单选题] *A.Not to knowB.Not knowing(正确答案)C.Not knownD.Not know15、One effective()of learning a foreign language is to study the language in its cultural context. [单选题] *A. approach(正确答案)B. wayC. mannerD. road16、Medicines are to be taken according to the doctor’s advice. [单选题] *A. 发放B. 提取C. 配方D. 服用(正确答案)17、The manager isn’t in at the moment. May I _______ a message? [单选题] *A. take(正确答案)B. makeC. haveD. keep18、---Where’s that report?---I brought it to you ____you were in Mr. Black’s office yesterday. [单选题] *A. ifB. when(正确答案)C. becauseD. before19、If you know the answer, _______ your hand, please. [单选题] *A. put up(正确答案)B. put downC. put onD. put in20、My brother usually _______ his room after school. But now he _______ soccer. [单选题] *A. cleans; playsB. cleaning; playingC. cleans; is playing(正确答案)D. cleans; is playing the21、Sometimes only()10 out of 500 or more candidates succeed in passing all the tests. [单选题] *A. as many asB. as few as(正确答案)C. as much asD. as little as22、Tom is very _______. He never cleans his room. [单选题] *A. lazy(正确答案)B. activeC. shyD. healthy23、His remarks _____me that I had made the right decision. [单选题] *A.ensuredB.insuredC.assured(正确答案)D.assumed24、Be careful with the knife. You may hurt _______. [单选题] *A. himselfB. ourselvesC. myselfD. yourself(正确答案)25、There are many beautiful _______ in the wardrobe. [单选题] *A. bookB. dresses(正确答案)C. cell phoneD. grocery26、Which animal do you like _______, a cat, a dog or a bird? [单选题] *A. very muchB. best(正确答案)C. betterD. well27、Finally he had to break his promise. [单选题] *A. 计划B. 花瓶C. 习惯D. 诺言(正确答案)28、17.—When ________ they leave here?—Tomorrow morning. [单选题] *A.doB.will(正确答案)C.doesD.are29、Which do you enjoy to spend your weekend, fishing or shopping? [单选题] *China'shigh-speed railways _________ from 9,000 to 25,000 kilometers in the past fewyears.A. are growing(正确答案)B. have grownC. will growD. had grown30、61.How is online shopping changing our way? ? ? ? ? ? life? [单选题] *A.of(正确答案)B.in C.on D.for。
盐城市2024届高考英语信息卷二2024.05.22第二部分阅读(共两节, 满分50分)第一节(共15小题;每小题2.5分,满分37.5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。
ATravel Wifi (formerly TEP Wireless) is a global company with a simple mission: to keep you connected to the Internet while traveling. They do this by providing wifi hotspot devices (for rent or purchase) that can be used on 6 different continents.About the wifi devicesThe Pocket Travel Wifi devices are the size and shape of a small smartphone. The standard Hotspot Rental and The Sapphire 2 (for purchase) share a similar design with one button and one mini-USB charging port. However, it’s important to note that these devices are not waterproof. When fully charged, they should last around 12 hours with fairly regular wifi use. Additionally, the Sapphire 2 model features indicator lights displaying signal strength and battery life.Renting vs. Buying the travel wifi deviceThe cost of purchasing a travel wifi device is $89-$109, and then you pay on top of that for data packages ($29.9 for 20 GB in a month). Most frequent travelers buy their own device for convenience.The rental price is based on the total number of days that you’ll keep the device and how much data you want to use each day. Daily rates range from $6.9 for 1 GB, $12.9 for 2 GB to $16.9 for 3 GB. Week pass ($45.9) with no data limit is also a good choice for short-term travelers.21. What is an advantage of the travel wifi device?A. It is convenient to carry.B. It is quick to charge.C. It is resistant to water.D. It is excellent in signal.22. For a 7-day UK trip, what’s the minimum rent for a Wi-Fi device?A. $6.9B. $29.9C. $45.9D. $48.323. Which group may be excluded from the intended audience?A. Regular travelers.B. People on business globally.C. Passionate surfers.D. Tourists accessing wifi abroad.BBorn in 1973 in Wenzhou, Jiang Shengnan is the youngest daughter in the family and her name, Shengnan, translates as “better than men”. She was a bookworm as a primary school student and often spent what she calls “a colorful day” at the school library, reading one or two books a day, absorbed in her own world.Jiang began reading Qing Dynasty (1644-1911) author Cao Xueqin’s Dream of the Red Chamber in the second grade, when she did not even fully understand all the characters. She also loved reading history, and the first historical books she read were the Chronicles of the Eastern Zhou Kingdoms, stories that are more than 2,280 years old.In 1996, she wrote her first martial arts novel Modao Fengyun to entertain herself. In 1997, she bought a computer and typed in the manuscript (手稿), but with nowhere to publish, only family and friends read the book.Jiang focused on women, who were usually overshadowed and presented as simplified characters in Chinese literature, particularly important historical women. She realized that Chinese historical novels tended to focus on emperors, kings, and generals, and women often featured as vehicles, such as virtuous wives and good mothers.Among the 2,000 ratings on Douban, a major review aggregator (聚合器) in China, nearly 70 percent of readers gave Jiang’s most famous novel four stars or more out of five. One reader, nicknamed Yinrendeponiang, who gave thenovel four stars, commented that, “The book describes the life o f China’s first empress dowager (女皇), through a mix of fiction and history. It details her journey from birth to rule, and how the changes in her life influenced her, shaping her into a kind yet tricky individual. She resists others’ control over her...Thi s book not only informs us about her path to growth, but also shows how a woman can achieve success through her own efforts.”24. What can we learn about Jiang from the first two paragraphs?A. She had an extremely romantic view of life.B. Her reading choices were family-influenced.C. Her hobby was comparable to men’s early on.D. She tackled complex literature at a young age.25. Why did Jiang’s family and friends be the readers of her early works?A. To persuade her out of writing.B. To kill their time for entertainment.C. To encourage her writing enthusiasm.D. To help her find mistakes in her work26. What is the author’s purpose of mentioning Yinrendeponiang?A. To call on women to achieve success.B. To show his dissatisfaction with the novel.C. To make comments on China’s first empress dowager.D. To demonstrate Jiang’s work is well-received on Douban.27. Which proverb can best describe Jiang’s work?A. Knowledge is power.B. Women hold up half the sky.C. One good turn deserves another.D. Constant dripping wears away the stone.CThe male western tanager (唐纳雀) looks like a little flame, while females are less showy, a dusty yellow. In the spring, they prepare to move thousands of miles to the Mountain West of Central America, flying through grasslands, deserts, and occasionally, suburban yards.To fuel them on their lengthy journey, western tanagers fill up on insects and berries. But as global climate change causes spring to start earlier, birds such as western tanagers are ar riving at their destination after what’s known as “green-up”, when flowers begin blooming and insects emerge. According to a study published in early March in the journal PNAS, this kind of timing mismatch between migrants (迁移动物) and their food sources, which is happening across North America, could have serious consequences for migratory birds’ survival. “In discussing climate change, we often focus on warming,” says Scott Loss, a co-author of the study. “But the length and timing of seasons—like when winter ends and spring begins—are some of the most dramatic effects of climate change.”Loss and his colleagues used satellite imagery from 2002 to 2021 to calculate the average start of spring green-up along the typical migration routes of 150 North American bird species, then compared that timing with the current green-up. They found that spring is indeed beginning earlier along birds’ migration routes. “By contrary, previous studies have mainly focused on songbirds in Eastern North America,” says Morgan Tingley, an ornithologist at UCLA, “but this new investigation shows that bird species in the West and at different levels of the food web might be just as vulnerable (脆弱的).”“Part of it is knowing which species are vulnerable to various threats,” Loss says. “This adds to the knowledge about vulnerability of a wide range of bird species.” And he hopes that the information will serve to highlight the urgent need to lower greenhouse-gas emissions as fast as possible. “It’s really important, if we can’t address cl imate change immediately, to try to stop habitat loss as much as we can.”28. What may pose a direct threat to western tanagers’ survival?A. Global warming.B. The duration of changing seasons.C. Loss of habitats due to human activities.D. Decreased access to foods during migration.29. What is unique about the new study on birds like western tanagers?A. It covers a wider geographic range.B. It reveals the decline in bird populations.C. It centers on the adaptation of bird species.D. It ensures the existence of a timing mismatch.30. What does Loss suggest we do to safeguard migratory birds?A. Lessen the effects of climate change.B. Preserve ecosystems for bird species.C. Address emissions and habitat loss.D. Expand researches on threats to birds.31. Where is the text most likely from?A. A scientific journal.B. A bird-watching guidebook.C. A website about climate change.D. A magazine about wildlife conservation.DComputer scientist Pascale Fung can imagine a bright future in which AI helpers like ChatGPT bridge language barriers. In that world, Indonesian store owners fluent only in local dialects might reach new shoppers by listing their products online in English.“It can open opportunities,” Fung says—then pauses. She’s spotted the bias (偏好) in her vision of a more interconnected future: The Al-aided shopping would be one-sided, because few Americans would bother to use AI translation to help research products advertised in Indonesian. Fung, director of the Center for AI Research at the Hong Kong University of Science and Technology, who herself speaks seven languages, sees this bias in her own field. Fung would like to see Al change that, not further strengthen the primary position of English.Fung is part of a global community of AI researchers testing the language skills of ChatGPT and sounding the alarm about evidence that they are significantly less capable in languages other than English. “One of my biggest concerns is that we’re going to exacerbate the bias for En glish and English speakers,”says Thien Huu Nguyen, a University of Oregon computer scientist. “People are going to follow the norm (标准) and not think about their own identities or culture. It kills innovation.”The AI systems are good at translating other languages into English, but they struggle with rewriting English into other languages. Nguyen’s study reports that tests on ChatGPT in March showed it performed substantially (基本上) worse at answering factual questions or summarizing complex text in non-English languages and was more likely to fabricate (捏造) information. “This is an English sentence, so there is no way to translate it to Vietnamese,” the robot responded inaccurately to one question.At a US conference, Senator Alex Padilla of California ask ed Sam Altman, CEO of ChatGPT’s creator, OpenA I, which is based in the state, what his company is doing to close the language gap. About 44 percent of Californians speak language other than English. Padilla, who also speaks Spanish, is questioning about the systems delivering fair linguistic (语言的) outcomes without big shifts in strategies by their developers.32. What’s Fung’s attitude to the non-English language skills of ChatGPT?A. Optimistic.B. Dismissive.C. Doubtful.D. Unclear.33. What does the underlined word “exacerbate” mean in Paragraph 3?A. Restrict.B. Worsen.C. Encourage.D. Disturb.34. What is in line with Nguyen’s study regarding ChatGPT?A. It performs better in translating into English.B. It excels in non-English language translation.C. It tends to invent information in translations.D. It struggles with turning English to other languages.35. What’s the most suitable title for the text?A. ChatGPT: Exposing linguistic biasB. ChatGPT: Bridging Language BarriersC. ChatGPT: AI Translation RevolutionD. ChatGPT: Leaving Non-English Out in AI第二节(共5小题;每小题2. 5分,满分12. 5分)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。
international journal of remote sensing稿件准备-回复International Journal of Remote Sensing: Manuscript Preparation (1500-2000 words)Introduction:The International Journal of Remote Sensing (IJRS) is a prestigious platform for researchers and scholars worldwide to publish their work in the field of remote sensing. To ensure the quality and consistency of the published manuscripts, it is essential to properly prepare and format your submission. This article will guide you through the step-by-step process of preparing your manuscript for submission to the IJRS.1. Title:The first step in preparing your manuscript is to create a compelling and informative title. Ensure that it accurately reflects the content of your study while intriguing potential readers. Avoid using abbreviations, acronyms, or jargon that may not be widely understood.2. Abstract:Compose an abstract that concisely summarizes the objectives, methods, results, and conclusions of your research. It should be between 150 and 300 words and highlight the key aspects of your study. Write it in a clear and concise manner, making it both informative and appealing to potential readers.3. Keywords:Select 5-8 keywords that best describe the subject and scope of your research. These keywords will help in indexing and searching for your article.4. Introduction:Provide a comprehensive introduction to your research topic. Clearly state the research problem, objectives, and significance of your study, along with a brief review of existing literature and the research gap you aim to fill.5. Materials and Methods:Describe the materials and methods used in your research in chronological order. Include sufficient details so that the study can be reproduced. Provide information about the study area, data sources, remote sensing techniques, and any statistical or analyticaltools utilized. Ensure that the methods are appropriate and rigorous.6. Results and Discussion:Present your results in a logical and systematic manner. Use tables, figures, and graphs to enhance clarity and understanding. Analyze and interpret your findings, comparing them with previous studies when available. Discuss the implications and significance of your results and relate them to the objectives stated in the introduction.7. Conclusion:Summarize the main findings of your research and highlight their implications. Discuss any limitations or constraints faced during the study and suggest areas for further research. The conclusion should be concise, clear, and well-supported by your results.8. References:Cite all the sources used in your manuscript accurately and consistently. Follow the IJRS's referencing style guide or use a standard referencing style such as APA, MLA, or Harvard.9. Proofreading and Revision:Before submitting your manuscript, thoroughly proofread it for errors in grammar, spelling, and punctuation. Revise the content to ensure it flows logically and consistently. Seek feedback from colleagues or mentors to improve the clarity and readability of your manuscript.10. Formatting and Submission:Finally, format your manuscript according to the IJRS guidelines. This includes font size and style, line spacing, citation format, and layout. Ensure that your manuscript meets the specified word limit and follows any additional instructions provided by the journal. Submit your manuscript through the designated online submission system, following the submission guidelines.Conclusion:Properly preparing your manuscript for submission to the International Journal of Remote Sensing plays a crucial role in increasing the likelihood of acceptance and publication. By following the step-by-step guidelines provided in this article, you can enhance the readability, clarity, and overall quality of your manuscript, increasing its chances of making a valuablecontribution to the field of remote sensing.。
Article I D:1001-0742(2004)02-0276-06 CLC number:X16;X22 Docu ment code:ARemote sensing of the urban heat island and its changes in Xiamen City of SE ChinaXU Han-qiu*,CHEN Ben-qing(College of Environmental and Resources En gineering,Fuzhou Un iversity,Fuzhou350002,China.E-mail:fdy@)A bstract:World-wi d e urbanizati o n has si g nificantly modified the landscape,which has important climatic implications across all scales due to the simultaneous removal of natural land cover and introduction of urban materials.This resul t ed in a phenomenon known as an urban heat island(UHI).A study on the U HI in Xiamen of China was carried out using remote sensing technology.Satellite thermal infrared images were used to determine surface radiant temperatures.Thermal remote sensing data were obtained from band6of two Landsat TM ETM+images of1989 and2000to observe the UHI changes over11-year period.The therm al infrared bands were processed through several image enhancement technologies.This generated two3-dimension-perspecti v e images of Xiamen's urban heat island in1989and2000,respectively,and revealed heat characteristics and spatial distribution features of the UHI.To find out the chan ge of the UHI between1989and2000,the two thermal images were first normalized and scaled to seven grades to reduce seasonal difference and then overlaid to produce a difference image by subtracting corresponding pixels.The di f ference image showed an evident development of the urban heat island in the11years. This chan ge was due largely to the urban expansion with a consequent alteration in the ratio of sensible heat flux to latent heat flux.To quantitati v ely compare UH I,an index called Urban-Heat-Island R atio Index(UR I)was created. It can reveal the intensity of the UH I within the urban area.The cal c ulation of the index was based on the ratio of UHI area to urban area.The greater the index,the more intense the UHI was.The calculation of the index for the Xiamen City indicated that the ratio of UH I area to urban area in2000was less than that in1989.Hi g h temperatures in several areas in1989were reduced or just disappeared,such as those in old downtown area and Gulangyu Island.For the potenti a l mitigation of the UHI in Xiamen,a long-term heat island reduction strategy of plantin g shade trees and using li g ht-colored,hi g hly reflecti v e roof and paving materials should be included in the plans of the city planers,environmental managers and other decision-makers to im prove the overall urban environment in the future. Keywords:remote sensing;urban heat island;urban-heat-island ratio index;di g ital brightness model;Xiamen CityIntroductionOver the past50years,the rapid growth of the urban areas in the world(Masek,2000)has altered the surface energy balance and r esulted in a climatic phenomenon known as an ur ban heat island(UHI).The resulting higher temperature caused by the UHI has effects on meteorology and air quality and has been a concern all over the world as this influences the local,mesoscale,and even the macroscale climate(Auer,1978;Balling,1988;Roth,1989;Owen, 1998;Carlson,2000).U.S.E PA and NASA have lunched UHIPP(1997)and ATLANTIC(1996)pr ojects,which take several U.S.cities as cases to study ur ban heat island phenomenon and the mitigation strategies(Quattrochi,1997; Lo,1997b;Estes,1999).In China,the urbanization has been trigged since the early1980's when China began its reform.The urbanization has also led to the serious land use cover changes and brought about the urban heat island pr oblem.More and more attention has been paid to this pr oblem(Zhou,1982;2001;Zhao,1994;Liu,1998; Chen,2002).This study aims to understand urban heat island effect of Xiamen City in SE China and its changes during the years from1989to2000,an eleven-year period of time.Xia men City is located in coastal areas of southeast Fujian Province,China.The approximate geographical position of the central city is118°04′04″E and24°26′46″N. The city is one of the earliest cities established as special economic zones in China.The area of Xiamen is1565km2, of which131km2is the ar ea of Xiamen Island.Its population was1.31million in2000.The economy of the city has developed very fast since the reform started.The GDP of the city reached50.2billion RMB Yuan in2000.The rapid economic development has also accelerated the urbanization. With the urban expansion,the regional land use cover has changed dramatically and urban heat island phenomenon has become obvious.Therefore,it is necessary to study the cause,spatial distribution pattern,and temporal c hange of the city's urban heat island to mitigate the UHI and to impr ove the quality of life of the city.1 MethodsThe urban heat island is a typical climate feature due to urbanization,which shows that the air temperatur es in urban areas are higher than in the surrounding rural areas.W MO indicated that ur ban heat island effect would cause the air temperature in an urban area2—8°F higher than its surrounding areas.The urban heat island results from various factors.Among them,the thermal characteristic of the ground surface materials of the urban areas is one of the most important factors.The surface radiant temperature responses this land surface thermal characteristic and always has a similar spatial distribution pattern to that of air temperature. Accordingly,the urban heat island can be understood by studying the surface radiant temperatur e.The typical study on urban heat island is usually based on the data collected from ground meteor ological stations. Such a study,however,is difficulty to fully understand the urban heat island phenomenon because it is difficult to take enough temperature measurements over a lar ge city area toJour nal of Environme ntal Sciences Vol.16,No.2,pp.276—281,2004I SS N1001—0742CN11—2629XFoundation item:The M inistry of Education of China for t he Key Univers ity Teachers;*Corresponding authorcharacterize the temperatur e variability based on these limited and sparsely distributed stations (Owen ,1998).Nowadays ,the study has been largely improved owing to the development of the thermal infrar ed remote sensing technology ,which can effectively and completely detect the characteristics of the ur ban heat field .Moreover ,the r epetitive coverage offered by satellites allows monitoring urban heat island dynamics .In this study ,t w o cloud -free thermal infrared images fr om band6of Landsat TM E TM +,acquired on June 15,1989and April 18,2000,r espectively ,have been used to detect the ur ban heat island in Xiamen City and its changes during the 11—study years .1.1 Computation of the surface radiant temperatureLandsat TM ETM +band 6measures the amount of ther mal infrared emission that is pr oportional to the temperature of the emitting body in the ground and corresponds to the air temperature due to strong linear positive correlation between surface temperature and air temperature .Therefore ,the air temperature can be deduced from the ther mal radiant intensity that is represented by pixels 'brightness values digital numbers (DNs )in a thermal infrared image .However ,the accurate calculation of the air temperature based on such a method is very difficult as the ther mal infrared emission from the land surface recorded by the satellite sensors is usually affected by numerous factors .Intensive researches are still being carried out on this matter (Zhang ,1999).Nevertheless ,the urban heat island can be detected by studying the radiant te mperature alone because (1)the study of ur ban heat island is mainly focused on the spatial distribution pattern of relative heat intensity ,(2)atmospheric correction would not significantly change relative temperature values within an image ,and (3)the radiant temperature has a ver y strong positive linear correlation with air temperature as mentioned above .Also ,Xiamen City is not a big city ,i .e .,not covering a big area ,and therefor e the derived radiant temperature can be c onsidered accurate if the ar ea is clear (cloud fr ee )and dr y (Lo ,1997a ).Consequently ,it is possible to use surface radiant temperature in this study to understand the city 's urban heat island phenomenon and its change .The surface radiant temperatures of band 6can be deduc ed using the following formulae (Chen ,1999;Mar kham ,1986;NASA ,2002):R T M6=(V 255(R max -R min )+R min ) B ,where R T M6is the spectral radianc e (mW (cm 2·ster ·μm ));R max =1.896mW (cm 2·ster ),the maximum radiantbrightness a sensor can detect ;R min =0.1534mW (cm 2·ster ),the minimum radiant brightness a sensor can detect ;V :brightness values digital numbers of T M 6,B =1.239in μm ,valid spectrum range of TM 6;andTs =K 1ln (K 2 R TM6+1)-273.15,where T s is surface radiant temperature (℃);K 1is 1260.56(for TM )or 1282.71(for ETM +)in Kelvin ;K 2is 60.776for TM or 66.609for ETM +in mW (cm 2·ster ·μm ).Through above computation ,the digital numbers of thetwo TM ETM +images have been transfor med into surface radiant temperatures that range from 21.1to 33.3℃on June 15,1989and 16.6to 31.6℃on April 18,2000.The average temperature differences between urban and rural of these two dates were 4.8℃(6 15 1989)and 3.4℃(4 18 2000),r espectively .1.2 Image processing of thermal infrared imageIn order to reveal the ther mal spatial distribution pattern of Xia men City ,the thermal infrared images have to be enhanced using several image -pr ocessing techniques .The registered and rectified images were first proc essed using piecewise linear stretch and a 3×3a vera ge low path filter .This enhanced the contrast of land covers and highlighted the thermal areas in a pseudocolor model .The ima ges were further enhanced using a density slice technique to reveal the intensity of the urban heat island .To improve visualization of the UHI ,a digital brightness -temperature model (DB M )wascreated using brightness values of TM ETM +band 6.This allowed observing the heat islands in a 3-dementional perspective .The urban heat islands looks just like many islands surround by oceans (low temperature areas )(Fig .1).2 Results and analysis2.1 UHI phenomenon of Xiamen City 2.1.1 Distribution features of surface temperaturesFig .1shows that the UHI was evident in Xiamen City either in 1989or in 2000.The UHI difference between the two years is also clear .Fig .1 3-D views of the urban heat island of Xiamen (Left ;6 15 1989,Right :4 18 2000) There were three high temperature areas in the city in 1989,located in the old downtown area in west Xiamen277No .2Remote sensing of the urban heat island and its changes in Xiamen City of SE ChinaIsland ,Xinglin and north Haichang areas (Fig .2).Theyshowed very clear features of the UHI apart from that in north Haichang area that was due to a large exposed rocky area .The UHI has a str ong contrast compared to surrounding “cool ”areas .In addition ,the airport ,rail w ay station ,Dongdu Dock ,and some areas in Huli also show the UHI phenomenon .With the expansion of urban ,the distribution area of the UHI in 2000was greater than in 1989(Fig .2).The incr eased UHI areas were consistent with the new urban areas developed since 1989.Among them ,Xinglin area was almost within high temperature area .Most part of Jimei area also showed UHI characteristics with the high temperature areas moving forwards to the new built -up areas in the north ofJimei .The ne w Haichang Industrial Estate is also within the high temperature area .In Xia men Island the UHI is mostly found in old downtown area ,airport ,railway station ,Dongdu Dock and some industrial ar eas .2.1.2 UHI changesTo further study the UHI changes of the city in the 11-study years ,a change detection technique has to be applied to the two thermal infrared images .However ,it is difficult to compare these two images directly using the surface temperatures computed in Section 1.1due to the seasonal difference between t w o images of which one was acquired in June (summer of 1989)and the other in April (spring of 2000).To solve this problem ,a normalization technique and an urban -heat -island ratio index (URI )have been created .The UHI study is usually focused on the spatial distribution patterns of relative temperature difference .The seasonal difference can only affect the absolute temperature values but not affect the distribution pattern of the temperature .Therefore ,nor malization to the two images with different seasons can rescale the radiant temperature to the same level between 0and 1and thus reduce the seasonal difference .Accordingly ,the two ther mal infrared ima ges of Xiamen have been nor malized using the following equation :N i =Ts i -Ts minTs max -Ts min,where N i is the normalized value of pixel i ;Ts i is the radiant temperature value of pixel i ;Ts min is the minimum value of the radiant temperature in the image ;Ts max is the maximum value of the radiant temperature in the image .The normalized images were further divided into 7levels using density slice technique with the lowest temperature level assigned to level 1and the highest to level 7.A vector layer of the urban boundar y was also created to mask out the rural area and extract urban area from the images .The resultant images are sho wn in Fig .2and the area of each temperature level is given in Table 1.A change detection process can now be applied using image difference method based on the nor malized ima ges .This produces a difference image (Fig .3)which detects the changes of the UHI between 1989and 2000. Table 1 Area differences in s urface radiant temperature in Xiamen from 1989to 2000Level19892000Di fference between1989and 2000Area ,km 2%Area ,km 2%Area ,km 2%10.160.350.050.05-0.10-0.3020.000.001.591.451.591.4533.297.453.553.240.26-4.2149.4821.4818.3516.768.87-4.72517.0738.6957.5552.5640.4813.87611.9927.1825.6523.4213.65-3.7572.144.852.762.520.62-2.34Total44.13100.00109.50100.0065.370.00The further computation of the urban -heat -island ratioindex is based on the following :URI =1100m ∑ni =1w i p i,Fig .2 Graded radiant temperature i mages showing the urban heat is land phenomenon (L eft :6 15 1989,R ight :4 18 2000)where U RI is the urban -heat -island ratio index ,m is thenumber of normalized temperature levels ;i is the level value of temperatures higher than rural areas ;n is the number ofhigher temperature levels mainly occurring in urban areas ;w iis weighted value using the value of correspond level i ;p i is the percentage of level i .278XU Han -qiu et al .Vol .16Fi g .3 Difference i mage sho wing the change of the UHI distribution between 1989and 2000Fig .4 Scatter pl ots of surface radiant temperature (T s )vs .both NDVI and Wetnes s of 1989The radiant temperatures of Xiamen have been grouped into 7levels in this study and therefore the m equals 7.Levels 6and 7are mainly distributed in urban areas and the temperatures in rural areas are generally below level 6.Accordingly ,n is 2,i 1equals 6,i 2equals 7,and p i can be obtained fr om the percentage values of the corresponding levels (levels 6and 7in this case )in Table 1.Thus ,the URI can be calculated as follo ws :URI 1989=1100×7(7×4.85+6×27.18)=0.28,URI 2000=1100×7(7×2.52+6×23.42)=0.23. The calculation of the URI is on the basis of ratio of UHI area to urban area with the consideration of weighted values of each temperature level .The greater the URI ,the more intense the UHI is .The quantitative comparison of the UHI phenomenon of the two study images is no w possible through the above image pr ocessing and computation .It is clear that the area of the ur ban heat island expanded with the urban expansion (Figs .2and 3).The temperature can increase by 2to 3grades in several areas spots ,such as central area of Xiamen Island ,Xiangyu Dock ,expanded portion of the airport ,Haichang Industrial Estate ,factory sites in Xinglin area ,and some reclaimed areas by the sea .Although the area of UHI has incr eased in the studyperiod ,the calculated URI s suggest that the ratio of UHI area to urban area is decreased .U RI is 0.28in 1989and 0.23in 2000.The ar ea of highest temperature level (level 7)only makes up 2.52%of the ur ban area and area of level 6makes up 23.42%in 2000,while the data wer e 4.85%and 27.18%,respectively ,in 1989.This indicates the UHI has some what been mitigated .This can be typically found in old do wntown area .The temperatures of the area were within highest temperature area in 1989but were down 1to 2grades later in 2000(Fig .3).High temperatur e ar eas in many locations were significantly r educed or nearly disappear .In addition ,the number of high temperature areas in Gulangyu Island was decreased from 2to 1.This change was due largely to the local government and people 's efforts in protecting their living envir onments .The government has re -planned the old downtown ar ea ,moved out factories fr om the area ,eliminated more than 200chimneys ,built ne w parks ,and increased vegetated ar eas .The vegetated ar ea accountsfor 35.77%of the urban area with 9.89m 2per capita in 2000.All of the efforts have contributed a lot to the mitigation of UHI effects .2.1.3 Relationship am ong radiant temperatu re ,veget a -tion ,an d moistureAbove analysis implies a close relationship among radiant temperature ,vegetation and moistur e .A further analysis has been carried out to illustrate their relationships .Three vegetation indices were analyzed to choose a repr esentative ,which were NDV I ,RVI and Greenness Index derived from tasseled cap transformation .Statistical analysis of correlation shows that NDVI has stronger negative correlation with the surface temperature (Table 2)and thus been chosen to be a representative of vegetation .The correlation of surface radiant temperature (T s )with NDV I and with Wetness Index derived fr om tasseled cap transformation is clearly illustrated in Fig .4.The T s has negative c orrelation with the other two . Table 2 Correlation among surface radiant temperature (T s ),NDV I ,Greennes s and RV I of 1989and 2000NDVIGreenness RVI 1989T s -0.71-0.58-0.692000T s-0.68-0.68-0.68 Gillies and Carlson (Gillies ,1995),Gillies et al .(Gillies ,1997)and Owen et al .(Owen ,1998)ha ve indicated that the vegetation ,moisture and surface radiant temperatures have a triangle envelope relationship .Both vegetation and moisture affect the surface temperature .For est and dense vegetation locate in the top angle area of the279No .2Remote sensing of the urban heat island and its changes in Xiamen City of SE Chinatriangle with a narrow range of temperatures.Soil-dominant ground surface has a wide temperature range and locates in the bottom line of the triangle.The urbanized area locates around the right bottom angle area.The case in Xia men pr oves this relationship pattern(Fig.5).The NDV I and T s was used as two parameters to construct the scatter plots that clearly show a triangle.Points around the right bottom angle area correspond to urban areas in the ima ge.The urban area generally has mor e artificial materials and less vegetation. Consequently,the temperatures in urban area will go up and the pixels corresponding to the urban areas in an image would be located around the right bottom angle of the triangle .Fig.5 S catter plots of surface radiant temperature vs.N DVI,taking i mage data of4182000as an example.The figure showsan envelope of points rese mbl ing a triangle2.2 C auses of the UHI in Xiamen CityBy means of comparison of the Xiamen's case with those in the world,the main factors that c ontributed to the temperature rise in the urban district of Xiamen is considered as follows:(1)Difference in surface covering materials.With the mass replacement of vegetation with asphalt,brick,and concrete,the urban ar ea of Xiamen is covered by many dark materials.These surfaces have a low reflective capacity,so they absorb and store solar energy instead reflecting them. This results in the war mer in the ur ban area than its rural areas that are covered by more plants.(2)Fabric of the urban area.The urban area of Xia men is dominated by various tall buildings.The canyon-like structure created by tall buildings reduced infrared heat loss to the sky and thus enhanced the war ming.The heat was trapped between close-packed buildings by multiple reflection off the buildings.Moreover,the rough surfaces in the urban area obstacle the wind that would other wise disperse the heat trapped in the urban.Consequently,urban wind speed was lighter on average.Generally,the temperature difference between ur ban and rural will be pr onounced if the wind speed in the urban area is less than6m per second and there will no UHI if the wind speed is great than11m per second.(3)Increase in nonporous surface and decrease in vegetation coverage.With the replace ment of more and more vegetated areas by ur ban materials,the nonporous areas have incr eased dramatically while vegetated areas decreased significantly.This has largely decreased the cooling effect resulting from evaporative cooling.Moreover,the covering of nonporous pavement and well developed drainage system in the urban ar eas caused greater runoff and could not keep the water for evapotranspiration and cooling the urban.The change of the ratio of nonporous area to vegetated area has a directly impact on the urban temperature because the close relationship between albedo and evaporation.Urban surface under intense solar radiation will seek a heat sink.If the evaporation or moisture is available heat sinks in retarding rapid temperature rises.When evaporation route is not available,the heat is transferred to the air as sensible heat flux(Kim,1992).Sensible heat flux conditions requir e the surface temperature to be higher than air.Daylight heating in the urban exactly matches these conditions.The larger sensible heat flux values in an urban environment rise the temperature of the air above which eventually leads to an increase war mth of urban atmospher e(Badarinath,1999).(4)Difference in solar radiance gain between urban and rural.The urban surface of Xiamen absorbed or stored much more heat during the da ytime than its rural areas and therefore provided more heat to the atmosphere in the way of outgoing long wave transferring.The atmosphere then r eflects heat back to the gr ound again.Consequently,the temperature can be higher in the urban area than in its rural areas.(5)High artificial heat emitting.In addition to the above factors,the significant increase in vehicles,industry activities,and air conditioners also contributed a lot to the UHI phenomenon in the urban district because they released heat into the urban atmosphere.Researches have indicated that this heat contribution could be as much as one-third of that r eceived from solar ener gy.Briefly,the characteristics of the surfaces in urban and rural areas are different and their thermal properties also differ a lot in heat absorption,reflection,and evaporative loss.Therefore,the differences are the most important factors that caused the urban area of Xiamen war mer than its surrounding rural areas.In addition,the artificial heat sources also added the heat to the ur ban area.2.3 UHI effectsThe urban heat island has many effects on the city and the following is the three major aspects:(1)The UHI has increased the urban temperatures of Xiamen in the study years.This study reveals that the urban area was4.8℃and3.4℃warmer than its rural areas on June15,1989and April18,2000,respectively.Recent infor mation shows that the mean temperature has been war mer by0.5—0.8℃annually than usual from1999to2000 (Xiamen Bureau of Meteor ology,2001).(2)The UHI has resulted in the increase in cloudiness and precipitation but the decrease in moisture in the urban area of Xia men.The UHI usually set up a thermal circulation between the urban in surr ounding regions,which developed due to pressure differences caused by surface heating differences.Moreover,the air pollution in urban area resulted in occurr ence of much suspended particulate in the air.All of these will help increase in rainfall in urban areas than in rural areas.The precipitation in Xia men in2000was 346.88mm mor e than that in1989and the annual precipitation in the city has increased by20%and47%in 1999and2000,respectively(Xiamen Bureau of Meteorology, 2001).On the other hand,the runoff is much more in the urban than rural after raining because the urban has more nonporous pavements,well developed drainage system,and280XU Han-qiu et al.Vol.16less vegetation.Therefore,the urban surface is difficult to keep the water and the amount of the evaporation is less than that in rural areas.Consequently,the air moisture in the ur ban will be less than that in the rural and urban looks just like a“dry island”.For example,the moisture measured in Dongdu Meteorological Station within urban area on June15, 1989was less than those measured in the stations in rural areas of Xinglin and Haichang either at14pm or at20pm (Table3).This can be seen more clearly if comparing moisture reading of Dongdu with Haichang measur ed at20 pm.The difference can be as much as12percent. T able3 Relative hu mi dity at14∶00and20∶00at three observatories in Xiamen(6151989)D ongdu Xingl in Haichang14pm64686620pm828394(3)The UHI has a significant impact on air quality in the urban districts.Air pollution and the particulate will for m a shield for trapping heat and thus will,in turn,increase ur ban temperature.Urban Heat Islands increase the de mand for more cooling ener gy to maintain comfort levels in building structures.Incr ease in urban air temperature will increase har mful emissions,such as SO2and NOx,which are pr oduced when fossil fuels are burned to generate electricity. In addition,higher ambient air temperatures can increase the a mount of gr ound level ozone(O3),a photochemical oxidant and major component of smog.High concentrations of O3at ground level are a major health and environmental concern. O3is formed through complex chemical r eactions between pr ecursor emission of volatile organic compounds(VOC)and NOx in the presence of sunlight.Heavy transportation and industrial sources in the urban of Xia men emit both VOC and NOx.Sunlight and temperature stimulate their reactions and pr oduce a lot of smog,which,in turn,obscures the reflecting back long-wave heat radiance into the atmosphere and causes temperature rise.3 ConclusionsLandsat TM ETM+thermal infrared imagery plays an important role in the study of the UHI phenomenon.The use of the ima gery can gain insight into the UHI.The creation of a Digital Brightness Model(DB M)allows vie wing the UHI in a three-dimension perspective,which well illustrates the scenery of the UHI and thermal features of a region.The nor malization applied to extracted radiant temperature images makes it possible for the c omparison between the images with different seasons using a change detection technique.Further pr oposed urban-heat-island ratio index(U RI)makes it possible to quantitatively analyze UHI changes over a period of time.These techniques help solve the problems occurring in comparison of multi-temporal images with different seasons.The study shows that the UHI in Xia men is evident and has developed in the11-study years because of the urban expansion.Nevertheless,the mitigation can also be seen in some ur ban areas o wing to the significant increase in vegetation c overage in these areas.This can be clearly exa mined in old downto wn and Gulangyu ar eas where the UHI phenomenon has been significantly reduced or disappear ed.According to the triangle relationships am ong vegetation,moistur e,and surface te mperatures,planting mor e shade tr ees and other vegetation will reduce the UHI of the city.Mor eover,using light-colored,por ous,and highly reflective building and paving materials will also decrease urban temperatures.The combination of these t w o methods will dramatically benefit the environmental quality of Xiamen City.References:Auer A H,1978.Correl ation of land use and c over with meteorol ogical ano malies [J].J ournal of Applied M eteorology,17:636—643.Apprill A,1998.Energy emissivity anal ys is of Georgia State Univers ity Building Rooftops[Z].13.Badarinath K V,Gharia B,Dutt C B,1999.Urban environment monitoring us ing satellite data[C].In:Advance technol ogies in meteorology:Sympos ium proceedings of TR OPMET-95(Gupta,R.K.,R eddy,S.J.ed.).115—123.Balling R C,Brazil S W,1988.High resolution surface temperature patterns in a complex urban terrain[J].Photogrammetric Engineering and R emote Sens ing,54(9):1289—1293.Carlson T N,Arthur S T,2000.The i mpact of land use-land cover changes due to urbaniz ation on surface microcli mate and hydrology:a s atellite perspective [J].Gl obal and Planetary Changes,25:49—56.Chen Y H,Guo D Z,Zhou T G,1999.Noise remove of t hermal image and the determination of the temperatures[J].R emote Sensing Informati on,11(3): 7—9.Chen Y H,Li X B,Shi P J,2002.Study on spatial pattern of urban heat environment in Shanghai City[J].Geographical Sciences,22(3):317—323.Estes M G,Gors evs ki V,R uss el C et al.,1999.The urban heat island phenomenon and potential mitigation strategies[EB].http: caed proceedings99ESTES ESTES.Gillies R R,Carls on T N,1995.Thermal remote sens ing of surface soil water content with partial vegetation cover for incorporati on into cli mate models [J].J ournal of Applied M eteorology,34(4):745—756.Gillies R R,Cui J,Carlson T N,1997.Verification of the“Triangle”method for obtaining surface soil water content and energy fl uxes from remote meas urements of N DVI and surface radiant temperature[J].International Journal of Re mote Sens ing,18:3145—3166.Ki m H H,1992.Urban heat is land[J].Internati onal Journal of Remote Sens ing, 13:2319—2336.Liu W J,Li H M,1998.The urban heat island effect in the J inghong City[J].Tropical Geography,18(2):143—146.Lo C P,Faber J,1997a.Integration of landsat the matic mapper and cens us data for qual ity of life ass es sment[J].Remote Sensing of Environment,62: 133—157.Lo C P,Quattrochi D A,Luvall J C,1997b.Application of hi gh-res olution thermal infrared remote s ensing and GIS to ass es s the urban heat island effect [J].International Journal of R emote Sens ing,18(2):287—304.M as ek J G,Lindsay F E,Goward S N,2000.D ynamics of urban growth in the Was hington D C metropolitan area,1973—1996,from Landsat obs ervation [J].International Journal of R emote Sens ing,21(18):3473—3486.M arkham B L,Barker J L,ndsat MSS and TM post-cal ibration dyna mic ranges,exoatmospheric reflectances and at-s atellite temperatures[EB].http:l tpwww.gs fc.nas IAS handbook.N ASA,ndsat7science data us ers handbook[EB].http:ltpwww.gsfc. 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