第一篇：英文演講

The integrated navigation system using Kalman filtering data processing general technical.In the late 1960's Kalman filtering technology in the aerospace fields began after the application of real-time dynamic navigation algorithms, rapid development, the research Kalman filtering appears the nonlinear, square root Kalman filtering of integrated filtering algorithm, but then the Kalman filtering precision confined to solve and calculated stability, from the late 1980s so far, due to the development of computer technology level by adaptive Kalman filter, and centralized filter and federal filtering for represent, comprehensive consideration of the accuracy and reliability of the new generation of prudence and algorithm to navigation algorithms on the development and application of Kalman filtering theory, discretization rapid development.Despite the high reliability combined navigation algorithms already have made great progress, but these most studies for the linear system.And many algorithm still exist in performance in theory or blurred, concentrate filtering although in theory can give navigation parameters of the global optimal solution, but there are two fatal limitations, i.e.calculation burden and fault-tolerance poor.And based on the information distribution principle design federal filtering method algorithm, because its design flexibility, small amount of calculation and fault tolerance has good performance and attention.But federal filtering arithmetic ignores every single satellite navigation system filtering the correlation between the output, its fault tolerance is very difficult to guarantee.As the development of artificial intelligence, appeared again using neural network and fuzzy theory nonlinear technology processing integrated navigation data method, but these method is still in theoretical discussion stage, and the ideal data is used mostly simulation of artificial intelligence technology in the usability of integrated navigation system analysis demonstrated, if applied to the measured integrated navigation system also needs to solve a lot of problems.組合導航系統的數據處理一般采用Kalman濾波技術。60年代后期Kalman濾波技術在航空航天領域開始應用后，實時動態導航算法的研究得以快速發展，隨之出現了非線性Kalman濾波、平方根濾波等集成化的Kalman濾波算法，但當時的研究多局限于解決Kalman濾波精度及計算穩定性方面，從八十年代后期至今，由于計算機技術水平的發展，以自適應Kalman濾波、集中濾波和聯邦濾波等為代表，綜合考慮精度、可靠性及算法穩健性的新一代導航算法得以發展和應用，離散化Kalman濾波理論得以快速發展。盡管高可靠性組合導航算法研究已取得較大進展，但是，這些研究大多針對線性系統。而且許多算法還存在理論上或性能上的不嚴密性，如集中濾波雖然在理論上可以給出導航參數的全局最優解，但卻有兩個致命的局限，即計算負擔重和容錯性差。而基于信息分配原理設計的聯邦濾波法算法，由于其設計靈活、計算量小和容錯性能好而備受重視。但聯邦濾波算法忽略了各單一衛星導航系統濾波輸出量之間的相關性，其容錯性很難保證。隨著人工智能技術的發展，又出現了采用神經網絡、模糊理論等非線性技術處理組合導航數據的方法，但這些方法至今還處于理論探討階段，且大多采用模擬的理想數據對人工智能技術在組合導航系統中的可用性進行分析論證,如果應用到實測的組合導航系統還需要解決很多問題。

第二篇：英文演講

Ladies and Gentlemen, Good afternoon!I’m very glad to stand here and give you a speech.Hello!I wonder whether everybody knows the meaning of these two words of “energy-conservation ” and “ low carbon ”? I assume as a matter of course and know.Does “energy-conservation” save the energy? Does “low carbon” reduce carbon emission? Yes, it is really simple.We often chat about them.But, do you really understand them? Have they really taken root on your bottom of heart deeply?

Once, the Earth mother left our rich energy to cause us to be jubilant, sighed on Earth's energy inexhaustible, inexhaustible, now, the newest statistics indicated, the petroleum will dry up after 60 years, the coal also might supply the humanity to use for 250 years;Once, developed first, the environment question the situation which neglected is often occurred, now, the sustainable development, was together harmoniously with the nature the biggest topic.Not difficult to see, the environment question in is taken unceasingly by the people.For all this, the environment question was still stern, the energy conservation reduced the platoon, the low-carbon lives imminently.At the Copenhagen climate congress, this affects the human destiny the question slowly to be unable to reach the agreement actually.In the life, is driving the great displacement automobile, purchases including the fluorine air conditioning, the refrigerator, including the phosphorus laundry powder, turns on the air conditioning the low temperature also one side to bind in the summer the quilt, the daylight lamp is being long all night clearly, water cock water drop sound day and night not rest......These influence environment phenomenon common occurrence.This is rebels with ours position.American President Kennedy has said: Do not have to ask the country can

make any for us, must ask first oneself can make any for the country.The low-carbon life needs everybody to participation!

The low-carbon life first is one kind of life manner.So long as wants, each person may be able to achieve!The electricity saving, saves gas and oil, the solar terms, saving water, the tree-planting, makes use of waste, by step generation of vehicle......The intravenous drip, in life each aspect, all may choose the low-carbon life the manner.The low-carbon life is also representing one kind healthily, the more natural life style.Little eats counter-season food, the generation by works as season food;Little uses the disposable product, the generation by the duplicated things;Little rides an overhead traveling crane, little sits one time the elevator, the generation rides the bicycle, crawls the staircase, while falls the low-carbon withdrawal, we will have a healthier body and mind.We believed, so long as everybody works as one, participation together, humanity's tomorrow certainly will be able to be happier!Schoolmates, today, your low-carbon?

老師們、同學們：

大家好！不知大家是否知道“節能”和“低碳”這兩個詞的意思？我想當然知道。“節能”不就是節約能源嗎？“低碳”不就是降低碳排放量嗎？是啊，的確簡單。我們經常把它們掛在嘴邊。可是，你真的理解它們嗎？它們真的深深扎根在你的心底了嗎？

曾經，地球母親留給我們豐富的能源使我們興高采烈，感嘆地球上的能源取之不盡，用之不竭，現在，最新統計表明，石油將在60年后枯竭，煤還可以供人類使用250年；曾經，物資、能源的浪費多么猖獗，現在，“節約光榮，浪費可恥”成了新一代的口頭禪；曾經，“發展第一”，環境問題被忽視的情況時常發生，現在，可持續發展，與大自然和諧相處成了最大的課題。不難看出，環境問題在不斷被人們重視。

盡管如此，環境問題仍然嚴峻，節能減排、低碳生活迫在眉睫。在哥本哈根氣候大會上，這一影響人類命運的問題卻遲遲無法達成協議。在生活中，開著大排量汽車，購買含氟空調、冰箱，含磷洗衣粉，夏天把空調開著低溫還一邊裹著被子，日光燈徹夜長明，水龍頭滴水聲日夜不息......，這些影響環境的現象屢見不鮮。這是與我們的主張所悖逆的。

如果整個社會是大海，每個人就是一滴水，大海的污染，影響著每一滴水，也需要每一滴水努力幫助凈化污染。美國總統肯尼迪說過：“不要問國家能為我們做些什么，先要問自己能為國家做些什么。”低碳生活需要人人參與！

第三篇：經典英文演講

美國20世紀經典英語演講100篇（MP3+文本）

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? ·美國經典英文演講100篇:Farewell Address to Congress·美國經典英文演講100篇:1984 DNC Address·美國經典英文演講100篇:We Shall Overcome·美國經典英文演講100篇:Shuttle’’Challenger’’Disaster Address·美國經典英文演講100篇:Checkers·美國經典英文演講100篇:Pearl Harbor Address to the Nation·美國經典英文演講100篇:I Have a Dream·美國經典英文演講100篇:Civil Rights Address·美國經典英文演講100篇:A Time to Break Silence-Beyond Vietnam·美國經典英文演講100篇:1988 DNC Keynote Address·美國經典英文演講100篇:Atoms for Peace·美國經典英文演講100篇:The Truman Doctrine·美國經典英文演講100篇:First Inaugural Address·美國經典英文演講100篇:The Great Arsenal of Democracy·美國經典英文演講100篇:Acres of Diamonds·美國經典英文演講100篇:The Great Silent Majority·美國經典英文演講100篇:Farewell Address·美國經典英文演講100篇:Oklahoma Bombing Memorial Address·美國經典英文演講100篇:A Crisis of Confidence·美國經典英文演講100篇:1992 DNC Address·美國經典英文演講100篇:On Vietnam and Not Seeking Re-Election·美國經典英文演講100篇:Cambodian Incursion Address·美國經典英文演講100篇:Eulogy for Robert Francis Kennedy·美國經典英文演講100篇:Black Power·美國經典英文演講100篇:Chappaquiddick·美國經典英文演講100篇:40th Anniversary of D-Day Address·美國經典英文演講100篇:Presidential Nomination Acceptance..·美國經典英文演講100篇:The Marshall Plan·美國經典英文演講100篇:A Whisper of AIDS·美國經典英文演講100篇:1988 DNC Address(下)·美國經典英文演講100篇:I’ve Been to the Mountaintop·美國經典英文演講100篇:Statement on the Articles of Impeachment·美國經典英文演講100篇:1984 DNC Keynote Address·美國經典英文演講100篇:Houston Ministerial Association Speech·美國經典英文演講100篇:The Ballot or the Bullet·美國經典英文演講100篇:1976 DNC Keynote Address·美國經典英文演講100篇:Inaugural Address·美國經典英文演講100篇:Television News Coverage

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ·美國經典英文演講100篇:Against Imperialism·美國經典英文演講100篇:The Four Freedoms·美國經典英文演講100篇:American University Commencement Address·美國經典英文演講100篇:Nobel Prize Acceptance Speech·美國經典英文演講100篇:First Fireside Chat·美國經典英文演講100篇:The Evil Empire·美國經典英文演講100篇:A Time for Choosing·美國經典英文演講100篇:Ich bin ein Berliner·美國經典英文演講100篇:Duty, Honor, Country·美國經典英文演講100篇:Remarks on the Assassination of MLKing·美國經典英文演講100篇:Message to the Grassroots·美國經典英文演講100篇:Address on Taking the Oath of Office·美國經典英文演講100篇:Sproul Hall Sit-in Speech...·美國經典英文演講100篇:1980 DNC Address·美國經典英文演講100篇:Statement to the Senate Judiciary...·美國經典英文演講100篇:Television and the Public Interest·美國經典英文演講100篇:Presidential Nomination...·美國經典英文演講100篇:Religious Belief and Public Morality·美國經典英文演講100篇:Vice-Presidential Nomination...·美國經典英文演講100篇:Truth and Tolerance in America·美國經典英文演講100篇:The Great Society·美國經典英文演講100篇:1988 DNC Address(上)·美國經典英文演講100篇:Brandenburg Gate Address

第四篇：英文演講

Low-carbon is a buzzword these days, but the notion is no longer ambiguous for cities in China as the country selects five provinces and eight cities to make them the first batch of low-carbon pilot areas.Su Yi has the detail.The selected areas have promised to work out a low-carbon development plan to accelerate the establishment of a low carbon industry and promote people's low-carbon lifestyles.Lei Hongpeng, senior program officer of climate and energy programme with World Wide Fund for Nature, the world's largest conservation non-governmental organization, says the pilot project is a significant measure China has taken to deal with climate change.“Firstly, from a global perspective, we all know climate change is one of the biggest challenges the whole world is facing, I think China is one of the big emitters and also one of the countries who is affected by climate change, so China should do some thing to tackle climate change.The second is domestic perspective;China needs to explore a way to realize its development target, at the same time with limited sources and environment.”

The selected provinces are Guangdong, Liaoning, Hubei, Shaanxi and Yunnan, while the eight cities include Tianjin, Chongqing, Shenzhen, Xiamen, Hangzhou, Nanchang, Guiyang and Baoding.Lei Hongpeng explains the government's thinking behind choosing these places as the first batch of the pilot program.“I think from provincial level, the government selected these pilots mainly base on-every area, one province or municipality is selected.For example, northeast we have Liaoning province, north China we have Tianjin municipality and so on.For the cities, I think the governments really consider about capacity and their actions in the past several years, which mean the cities can go forward further with their strong experience and knowledge on low-carbon development.”

By the end of August, these provinces and cities have to submit their plan to the National Development and Reform Commission for approval.Xu Mindong, an official from the Development and Reform Commission of Hangzhou, talks about their plan.“Hangzhou started the preparation long ago, and we have an environmental advantage.The selected areas have their own unique features, some focus on new energy, some focus on ecological construction.Hangzhou's emphasis is on six aspects, including low carbon economy, environment, architecture, transportation and a low carbon society.”

The local governments in those areas have to manage to establish a data gathering system of greenhouse gas emissions, while combining the efforts of all their industries to achieve the goal of maintaining a low-carbon society.For CRI, Im Su Yi.值此第五屆中國投資貿易洽談會召開之際，我謹代表中國政府，向來自世界各地的嘉賓表示熱烈歡迎！自1997年以來，中國已經成功地舉辦了四屆投資貿易洽談會。投資貿易洽談會在宣傳中國利用外資政策、促進外商來華投資、引導中國企業到海外投資等方面發揮了重要作用。

On the occasion of the Fifth China International Fair for Investment and Trade, I would like to extend, on behalf of the Chinese government, my warm welcome to all distinguished guests coming from all over the world.Since 1997, China has held four successful International Fairs for Investment and Trade.The Fair has played an important role in publicizing China’s policies on foreign investment attraction, promoting foreign capital inflow, and guiding Chinese companies to

make overseas investments.洽談會采取“引進來”與“走出去”相結合、投資與貿易相結合、展示與洽談相結合、項目推介與政策咨詢相結合、商務活動與學術研討相結合的方式。洽談會為海外朋友和企業家了解中國、走進中國，中國企業家了解世界、走向世界創造了一個機會，開辟了一條渠道。

The Fair integrates the strategy of “Attracting Foreign Investment” by “going global”, and deals with investment and trade together.It is combination of exhibitions and negotiations, a venue for both project presentation and policy consultation, and a place where business activities and academic seminars take place at the same time.The Fair has created an opportunity for foreign friends and entrepreneurs to know about China and make their way into this country;on the other hand, it has opened a new channel for Chinese businessmen to get acquainted with the rest of the world and go abroad.

第五篇：英文演講

演講稿一：

My understanding of Friendship

Good morning(or afternoon), my teachers and classmates!

Today, I would like to give a speech about ‘Friendship’.Friendship is important to us.Good friends are like gems.We all need friends.We cannot live in this world alone without friends.We need friends during our happy and sad times.They would share our joy and sadness with us.Good friends are always on our side to comfort and console us.They would provide us with encouragement.When we fall, good friends help us get back on our feet.My best friend is XXX.He is helpful and supportive, whenever I need a helping hand or a listening ear.I remember he helped me in my schoolwork.He helped me sweeping the classroom floor.And he also helped me a lot of other things.Of course I also helped him quite a lot.I wish to take this opportunity to say to XXX, let’s keep our friendship going on!Thank you!

演講稿二：

Good morning(or afternoon), my teachers and classmates!

The friend in need is a friend in deed 患難見真情

A life without friend is a life without sun!Many people will in and out of our life,but only true friend will leave footprints in our hearts.人生沒有朋友,猶如生活無太陽。很多人會在我們的生命出現,但是只有真正的朋友會在我們的心里留下腳印。

They like the bright lights in the dark, accompaning with us through the fear and confusion, guiding us to the right way of a nice future.They try their best to help us without thinking what they can get from it.他們如同黑暗中明亮的陽光，陪伴我們度過恐懼和困惑，指引我們走向正確的道路。他們盡他們最大的努力來幫助我們卻從不考慮他們能從中得到什么。

They like a warm coat in the rainy day, giving us strength to getting rid of dilemma, embracing us with big arms.They convince us that nothing is hard to conquer as long as they are with us.他們如同下雨天的溫暖外套，給我們力量去擺脫困境，用他們寬大的臂膀來擁抱我們。

他們讓我們知道只要有他們在身邊沒有什么是不能戰勝的。

They like a rule to point out our shortcomings, just hoping us to present best in front of others.The man who tells your faults is the one who really cares about you.他們如同一把標尺指出我們身上的缺點，只是希望我們能在其他人面前表現出最好的自己。能夠指出你身上不足的人才是真正關心你的人。

An ordinary friend has never seen your tears,but a real friend has shoulders for you to dilute your tears.An ordinary friend will take a bottle of wine to your part, but a real friend will come early to help you prepare,and go back late to help you tidy.An ordinary friend call you to talk about your trouble, but a real friend call you to handle your trouble 一個普通的朋友從未看過你流淚,但一個真正的朋友卻給你肩膀讓你依靠。一個普通的朋友會帶瓶葡萄酒參加你的派對,但一個真正的朋友會最早一個來幫你準備，最晚一個走來幫你收拾殘局。一個普通的朋友打電話給你聊聊你的麻煩,但一個真正的朋友告訴你怎么樣處理你的煩惱。

If you establish your friendship when you are in trouble, please cherish it.Otherwise when you lose it, you will find that how important it is.如果你在困難的時候建立起這份友誼的，請珍惜它，否則當你失去的時候，你會發現它是多么的重要。

演講稿三（詩歌）：

A forever friend 永遠的朋友

A friend walk in when the rest of the world walks out.別人都走開的時候，朋友仍與你在一起。”

Sometimes in life，有時候在生活中，you find a special friend，你會找到一個特別的朋友;，someone who changes your life just by being part of it.他只是你生活中的一部分內容，卻能改變你整個的生活。

someone who makes you laugh until you cant stop;

他會把你逗得開懷大笑；

someone who makes you believe that there really is good in the world.他會讓你相信人間有真情。

someone who convinces you that there really is an unlocked door just waiting for you to open it.他會讓你確信，真的有一扇不加鎖的門，在等待著你去開啟。

This is forever friendship.這就是永遠的友誼。

When you’re down，當你失意，and the world seems dark and empty，當世界變得黯淡與空虛，your forever friend lifts you up in spirits and makes that dark and empty world suddenly seem bright and full.你真正的朋友會讓你振作起來，原本黯淡、空虛的世界頓時變得明亮和充實。

your forever friend gets you through the hard times, the sad times, and the confused times.你真正的朋友會與你一同度過困難、傷心和煩惱的時刻。

If you turn and walk away，你轉身走開時，your forever friend follows，真正的朋友會緊緊相隨，if you lose you way，你迷失方向時，your forever friend guides you and cheers you on.真正的朋友會引導你，鼓勵你。

your forever friend holds your hand and tells you that everything is going to be okay.真正的朋友會握著你的手，告訴你一切都會好起來的。

and if you find such a friend，如果你找到了這樣的朋友，you feel happy and complete，你會快樂，覺得人生完整，because you need not worry，因為你無需再憂慮。

your have a forever friend for life，你擁有了一個真正的朋友，and forever has no end.永永遠遠，永無止境。