第一篇:英文演讲
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.组合导航系统的数据处理一般采用Kalman滤波技术。60年代后期Kalman滤波技术在航空航天领域开始应用后,实时动态导航算法的研究得以快速发展,随之出现了非线性Kalman滤波、平方根滤波等集成化的Kalman滤波算法,但当时的研究多局限于解决Kalman滤波精度及计算稳定性方面,从八十年代后期至今,由于计算机技术水平的发展,以自适应Kalman滤波、集中滤波和联邦滤波等为代表,综合考虑精度、可靠性及算法稳健性的新一代导航算法得以发展和应用,离散化Kalman滤波理论得以快速发展。尽管高可靠性组合导航算法研究已取得较大进展,但是,这些研究大多针对线性系统。而且许多算法还存在理论上或性能上的不严密性,如集中滤波虽然在理论上可以给出导航参数的全局最优解,但却有两个致命的局限,即计算负担重和容错性差。而基于信息分配原理设计的联邦滤波法算法,由于其设计灵活、计算量小和容错性能好而备受重视。但联邦滤波算法忽略了各单一卫星导航系统滤波输出量之间的相关性,其容错性很难保证。随着人工智能技术的发展,又出现了采用神经网络、模糊理论等非线性技术处理组合导航数据的方法,但这些方法至今还处于理论探讨阶段,且大多采用模拟的理想数据对人工智能技术在组合导航系统中的可用性进行分析论证,如果应用到实测的组合导航系统还需要解决很多问题。
第二篇:英文演讲
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?
老师们、同学们:
大家好!不知大家是否知道“节能”和“低碳”这两个词的意思?我想当然知道。“节能”不就是节约能源吗?“低碳”不就是降低碳排放量吗?是啊,的确简单。我们经常把它们挂在嘴边。可是,你真的理解它们吗?它们真的深深扎根在你的心底了吗?
曾经,地球母亲留给我们丰富的能源使我们兴高采烈,感叹地球上的能源取之不尽,用之不竭,现在,最新统计表明,石油将在60年后枯竭,煤还可以供人类使用250年;曾经,物资、能源的浪费多么猖獗,现在,“节约光荣,浪费可耻”成了新一代的口头禅;曾经,“发展第一”,环境问题被忽视的情况时常发生,现在,可持续发展,与大自然和谐相处成了最大的课题。不难看出,环境问题在不断被人们重视。
尽管如此,环境问题仍然严峻,节能减排、低碳生活迫在眉睫。在哥本哈根气候大会上,这一影响人类命运的问题却迟迟无法达成协议。在生活中,开着大排量汽车,购买含氟空调、冰箱,含磷洗衣粉,夏天把空调开着低温还一边裹着被子,日光灯彻夜长明,水龙头滴水声日夜不息......,这些影响环境的现象屡见不鲜。这是与我们的主张所悖逆的。
如果整个社会是大海,每个人就是一滴水,大海的污染,影响着每一滴水,也需要每一滴水努力帮助净化污染。美国总统肯尼迪说过:“不要问国家能为我们做些什么,先要问自己能为国家做些什么。”低碳生活需要人人参与!
第三篇:经典英文演讲
美国20世纪经典英语演讲100篇(MP3+文本)
·美国经典英文演讲100篇:Farewell Address to Congress·美国经典英文演讲100篇:1984 DNC Address·美国经典英文演讲100篇:We Shall Overcome·美国经典英文演讲100篇:Shuttle’’Challenger’’Disaster Address·美国经典英文演讲100篇:Checkers·美国经典英文演讲100篇:Pearl Harbor Address to the Nation·美国经典英文演讲100篇:I Have a Dream·美国经典英文演讲100篇:Civil Rights Address·美国经典英文演讲100篇:A Time to Break Silence-Beyond Vietnam·美国经典英文演讲100篇:1988 DNC Keynote Address·美国经典英文演讲100篇:Atoms for Peace·美国经典英文演讲100篇:The Truman Doctrine·美国经典英文演讲100篇:First Inaugural Address·美国经典英文演讲100篇:The Great Arsenal of Democracy·美国经典英文演讲100篇:Acres of Diamonds·美国经典英文演讲100篇:The Great Silent Majority·美国经典英文演讲100篇:Farewell Address·美国经典英文演讲100篇:Oklahoma Bombing Memorial Address·美国经典英文演讲100篇:A Crisis of Confidence·美国经典英文演讲100篇:1992 DNC Address·美国经典英文演讲100篇:On Vietnam and Not Seeking Re-Election·美国经典英文演讲100篇:Cambodian Incursion Address·美国经典英文演讲100篇:Eulogy for Robert Francis Kennedy·美国经典英文演讲100篇:Black Power·美国经典英文演讲100篇:Chappaquiddick·美国经典英文演讲100篇:40th Anniversary of D-Day Address·美国经典英文演讲100篇:Presidential Nomination Acceptance..·美国经典英文演讲100篇:The Marshall Plan·美国经典英文演讲100篇:A Whisper of AIDS·美国经典英文演讲100篇:1988 DNC Address(下)·美国经典英文演讲100篇:I’ve Been to the Mountaintop·美国经典英文演讲100篇:Statement on the Articles of Impeachment·美国经典英文演讲100篇:1984 DNC Keynote Address·美国经典英文演讲100篇:Houston Ministerial Association Speech·美国经典英文演讲100篇:The Ballot or the Bullet·美国经典英文演讲100篇:1976 DNC Keynote Address·美国经典英文演讲100篇:Inaugural Address·美国经典英文演讲100篇:Television News Coverage
·美国经典英文演讲100篇:Against Imperialism·美国经典英文演讲100篇:The Four Freedoms·美国经典英文演讲100篇:American University Commencement Address·美国经典英文演讲100篇:Nobel Prize Acceptance Speech·美国经典英文演讲100篇:First Fireside Chat·美国经典英文演讲100篇:The Evil Empire·美国经典英文演讲100篇:A Time for Choosing·美国经典英文演讲100篇:Ich bin ein Berliner·美国经典英文演讲100篇:Duty, Honor, Country·美国经典英文演讲100篇:Remarks on the Assassination of MLKing·美国经典英文演讲100篇:Message to the Grassroots·美国经典英文演讲100篇:Address on Taking the Oath of Office·美国经典英文演讲100篇:Sproul Hall Sit-in Speech...·美国经典英文演讲100篇:1980 DNC Address·美国经典英文演讲100篇:Statement to the Senate Judiciary...·美国经典英文演讲100篇:Television and the Public Interest·美国经典英文演讲100篇:Presidential Nomination...·美国经典英文演讲100篇:Religious Belief and Public Morality·美国经典英文演讲100篇:Vice-Presidential Nomination...·美国经典英文演讲100篇:Truth and Tolerance in America·美国经典英文演讲100篇:The Great Society·美国经典英文演讲100篇:1988 DNC Address(上)·美国经典英文演讲100篇:Brandenburg Gate Address
第四篇:英文演讲
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.值此第五届中国投资贸易洽谈会召开之际,我谨代表中国政府,向来自世界各地的嘉宾表示热烈欢迎!自1997年以来,中国已经成功地举办了四届投资贸易洽谈会。投资贸易洽谈会在宣传中国利用外资政策、促进外商来华投资、引导中国企业到海外投资等方面发挥了重要作用。
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.洽谈会采取“引进来”与“走出去”相结合、投资与贸易相结合、展示与洽谈相结合、项目推介与政策咨询相结合、商务活动与学术研讨相结合的方式。洽谈会为海外朋友和企业家了解中国、走进中国,中国企业家了解世界、走向世界创造了一个机会,开辟了一条渠道。
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:英文演讲
演讲稿一:
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!
演讲稿二:
Good morning(or afternoon), my teachers and classmates!
The friend in need is a friend in deed 患难见真情
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.人生没有朋友,犹如生活无太阳。很多人会在我们的生命出现,但是只有真正的朋友会在我们的心里留下脚印。
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.他们如同黑暗中明亮的阳光,陪伴我们度过恐惧和困惑,指引我们走向正确的道路。他们尽他们最大的努力来帮助我们却从不考虑他们能从中得到什么。
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.他们如同下雨天的温暖外套,给我们力量去摆脱困境,用他们宽大的臂膀来拥抱我们。
他们让我们知道只要有他们在身边没有什么是不能战胜的。
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.他们如同一把标尺指出我们身上的缺点,只是希望我们能在其他人面前表现出最好的自己。能够指出你身上不足的人才是真正关心你的人。
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 一个普通的朋友从未看过你流泪,但一个真正的朋友却给你肩膀让你依靠。一个普通的朋友会带瓶葡萄酒参加你的派对,但一个真正的朋友会最早一个来帮你准备,最晚一个走来帮你收拾残局。一个普通的朋友打电话给你聊聊你的麻烦,但一个真正的朋友告诉你怎么样处理你的烦恼。
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.如果你在困难的时候建立起这份友谊的,请珍惜它,否则当你失去的时候,你会发现它是多么的重要。
演讲稿三(诗歌):
A forever friend 永远的朋友
A friend walk in when the rest of the world walks out.别人都走开的时候,朋友仍与你在一起。”
Sometimes in life,有时候在生活中,you find a special friend,你会找到一个特别的朋友;,someone who changes your life just by being part of it.他只是你生活中的一部分内容,却能改变你整个的生活。
someone who makes you laugh until you cant stop;
他会把你逗得开怀大笑;
someone who makes you believe that there really is good in the world.他会让你相信人间有真情。
someone who convinces you that there really is an unlocked door just waiting for you to open it.他会让你确信,真的有一扇不加锁的门,在等待着你去开启。
This is forever friendship.这就是永远的友谊。
When you’re down,当你失意,and the world seems dark and empty,当世界变得黯淡与空虚,your forever friend lifts you up in spirits and makes that dark and empty world suddenly seem bright and full.你真正的朋友会让你振作起来,原本黯淡、空虚的世界顿时变得明亮和充实。
your forever friend gets you through the hard times, the sad times, and the confused times.你真正的朋友会与你一同度过困难、伤心和烦恼的时刻。
If you turn and walk away,你转身走开时,your forever friend follows,真正的朋友会紧紧相随,if you lose you way,你迷失方向时,your forever friend guides you and cheers you on.真正的朋友会引导你,鼓励你。
your forever friend holds your hand and tells you that everything is going to be okay.真正的朋友会握着你的手,告诉你一切都会好起来的。
and if you find such a friend,如果你找到了这样的朋友,you feel happy and complete,你会快乐,觉得人生完整,because you need not worry,因为你无需再忧虑。
your have a forever friend for life,你拥有了一个真正的朋友,and forever has no end.永永远远,永无止境。