科技论文英语演讲稿-Bismuth

第一篇：科技论文英语演讲稿-Bismuth

Good morning, my dear teacher and classmates, my name is ****, from***** I am here today to talk about the topic: ‘ Strong Spin-Orbit Splitting on Bi Surfaces’.Before the topic ,I would like to introduce that ***** is located in Chinese economic and financial center of Shanghai, being one of the most prestigious universities in China and having two beautiful campuses.Welcome to visit our school.Now I will use the following four parts to introduce my topic: Firstly, The Background of Rashba Effect , secondly, Surface Geometric Structure of Bismuth, then ,Surface States on Low-index Surfaces of Bismuth, finally, we will have the Conclusion.Rashba effect is a momentum-dependent splitting of spin bands in two-dimensional condensed matter systems similar to the splitting of particles and anti-particles in the Dirac Hamiltonian.The splitting is a combined effect of atomic spin-orbit coupling and asymmetry of the potential in the direction perpendicular to the two-dimensional plane.The possible use of this effect is for spintronics applications, spin-filter devices and quantum computing.Bi is a striking example of the possible difference between surface and bulk material properties.Most importantly, the surfaces are much better metals than the bulk due to the existence of electronic surface states crossing the Fermi level.Here the Bi surfaces were simulated by a 22 layer film embedded in vacuum., being confirmed by angleresolved photoemission(ARPES)investigations and first-principles calculations.Here we explain the Bi(111)surface in details.This figure shows surface states of Bi(111)calculated without and with spin-orbit splitting included.The shaded areas show the projection of the bulk bands obtained without and with SOC and their superposition.In the case without SOC, a parabolic surface state is located around Γ in the non-relativistic energy gap.This surface state band gives rise to a hexagonal electron-like Fermi surface element.When the SOC term is included in the calculation it results in a spin-splitting of the surface state in all directions and leaves it degenerate only at Γ and at M.Very close to Γ the relativistic surface state bands are degenerate with bulk states and show less clear surface character.A comparison to the experimental dispersion can therefore immediately reveal if the spin–orbit splitting picture is correct.Such a comparison is shown in Fig.5.The figure shows the calculated and measured electronic structure in the vicinity of two high symmetry points on surfaces of Bi(111), which is in good agreenment.We can see that the intensity of both surface states strongly decreases close to Γ.This is most likely due to the overlap with the projected bulk band structure.The surface states are no longer genuine surface states but surface resonances, which penetrate much more deeply into the crystal and give a lower photoemission intensity.Having inversion symmetry, this calculation yields two spin-degenerate bands near the Fermi energy that do not cross at Γ.In this picture, we can also see that both calculations of Bi(110)and Bi(100)surfaces show the very steep dispersion of the bands close to the symmetry point which is characteristic for the strong SOC.In conclusion, strong Spin-Orbit Splitting on Bi Surfaces is studied by first-principles calculations.The SOC term leads to a strong and anisotropic splitting of the surface-state bands that profoundly modifies the dispersion of the surface states and the surface FS.Thank you for listening!

第二篇：英语演讲稿科技

关于科技的英语演讲稿—technology and future the presence of students, ladies and teachers, everyone!i was prepared intervals of cloud today, in honor here entitled technology and future speech, i am very proud of both, but some unease.in recent years, we have seen our great motherland, the cause of the rapid development of technology, which allow me to a chinese i feel very proud.remember that long ago, cell phone use almost the only one, which is called, but a few years ago, cell phones has undergone great changes, not only look more beautiful, but also use more, you can use the phones to take pictures, meetings, internet, text messages, etc.a series of things that i their life more convenient, so i am more aware of the strength of the technology, but i am just a fledglings students, technology as the word also aware of the limited, i am unable to use some very difficult theory to elaborate technology xuanji, no right to work on their elders i can promise of the technology blueprint.but i am willing to use a student’s perspective to the imagine technology and the future.from genetic engineering is a live princes dream, nano-technologynot only technological change destiny, can change the future.challenges, but we will not give up that easily, we use our youth to predecessors vowed: never live up to their predecessors of our hope.looking back at the history of civilization, anderson is the history of mankind against the darkness of ignorance, is the 参考翻译：

在场的学生们，女士们，老师，大家好！我准备间隔云今天，为了纪念在这里题为“科技与未来”的讲话，我感到非常自豪的两个，但有些不安。近年

来，我们已经看到我们伟大的祖国，事业的迅速发展，技术，请允许我向中国我感到非常自豪。请记住，很久以前，手机应用几乎只有一个，这是所谓的，但在几年前，手机发生了很大变化，不仅看起来更漂亮，而且还更多地使用，您可以使用手机拍照，会议上，互联网，短信等一系列的事情，我的生活更方便，所以我更多地了解的力量，技术，但我只是一个幼鸟学生，“技术”作为也知道这个词的有限，我无法使用一些非常困难的理论阐述技术xuanji，没有权利对他们的长辈的工作我可以保证的技术蓝图。但我愿意利用学生的观点，以创新技术和未来。

从基因工程“是一个生活王子”的梦想，纳米技术“不洗你的衣服，”承诺，从人工智能“会给你一个可爱的机器狗”热情，转基因技术“让人们增长鼠标耳朵”奇观。这项新技术的诞生，一种新技术，将让人们欣喜若狂，因为这些新技术正在逐步改善我们的生活，让我们更多地了解自己。在近期内，中国完成了其第一个sars病毒基因组测序，sars是目前世界上最大的承认危险的疾病，但我们为什么不把其他国家完成第一次，我们刚刚完成的国家？很简单，这说明我们的国家比其他国家落后，不如别人，我们回顾过去，刚刚开始了一个国家的改革开放和当前的科技水平已经导致一个大国，我们的祖国经历了一些的跌宕起伏，有多少困难和坎坷，但我们仍然回到所有的祖国，祖国，因为我们坚信，-不仅是技术变革的命运，可以改变未来。我们这代人，一般感情的社会是一个强烈的竞争，学习一英尺下降。科学知识是我们关注的焦点，爱因斯坦，和斯蒂芬霍金，比尔盖茨是明星我们想到，计算机科学，物理学和化学的现代活力正在不断影响着我们。我们必须理解技术的重要性，知道该技术具有普遍性。

虽然技术创建一个新的生活前景征求思想，鼓舞人心的。然而，归根结底是要靠我们共同的努力，以实现。作为未来建设的骨干，我们这一代年轻人肩上的负担并不轻，新的机遇总是伴随的风险和挑战，但我们不会轻易放弃，我们用我们的青年前任誓言：决不辜负他们的前辈，我们的希望。

回首文明史上，安德森是人类历史上的黑暗的无知，是科学点燃了大火在肆虐人类灵魂的希望；技术支持文明，科学和技术，创造未来，但未来在我们的手中。让我们成为知识的探索者，让我们未知的道路上漫游，让我用我们的创造力，我们生活的世界变得更美好。

我从省,离这儿很远。我常常想念妈妈的亲戚、朋友,在我的家乡。然而,我不能经常见到他们。那么孤独总是会陪伴我。我很难过,我无法和他们在一起。

幸运的是,我在大学生活是丰富多彩的。有更多的闲暇时间,我们可以做更多的事情除了学习,如加入社团俱乐部,打工。这样的活动,不仅使我们的生活更加丰富多彩,而且还能帮助我们改进各种各样的技能。大学是一个社会,我们在这里学到的微缩有利于我们今后的生活。我们的人生之路不会一帆风顺。挫折是无法避免的。失败的一个重要的考试,跟男孩还是女孩的朋友,或者拒绝由一个有前途的公司,这样可能会让我们的挫折。有时候,我们觉得很沮丧,我们甚至大哭起来。

喝可乐是美妙的,尽管undesirble随之打嗝。这是苦的,酸和暴躁,而且甜。你甚至可以感觉到激动下一杯。全身后,一个大学的经验是成长的一部分。我们哭泣,微笑着,坠入爱河,受伤,离开,学习,然后我们做一个更好的人。

大学生活就像喝可乐。我的感受。我知道,我喜欢它!youth youth is not a time of life;it is a state of mind;it is not a matter of rosy cheeks, red lips and supple knees;it is a matter of the will, a quality of the imagination, a vigor of the emotions;it is the freshness of the deep springs of life.youth means a temperamental predominance of courage over timidity of the appetite, for adventure over the love of ease.this often exists in a man of sixty more than a body of twenty.nobody grows old merely by a number of years.we grow old by deserting our ideals.years may wrinkle the skin, but to give up enthusiasm wrinkles the soul.worry, fear, self-distrust bows the heart and turns the spirit back to dust.whether sixty or sixteen, there is in every human beings heart the lure of wonder, the unfailing child-like appetite of whats next, and the joy of the game of living.in the center of your heart and my heart there is a wireless station;so long as it receives messages of beauty, hope, cheer, courage and power from men and from the infinite, so long are you young.when the aerials are down, and your spirit is covered with snows of cynicism and the ice of pessimism, then you are grown old, even at twenty, but as long as your aerials are up, to catch the waves of optimism, there is hope you may die young at eighty.其他回答 共4条 pain past is pleasure.过去的痛苦即快乐。all things are difficult before they are easy.凡事必先难后易。nothing is impossible to a willing heart.心之所愿，无事不成。where there is life, there is hope.有生命必有希望。i feel strongly that i can make it.我坚信我一定能成功。better to light one candle than to curse the darkness.与其诅咒黑暗，不如燃起蜡烛。the shortest answer is doing.最简短的回答就是行动。four short words sum up what has lifted most successful individuals above the crowd: a little bit more.成功的秘诀就是四个简单的字：多一点点。（凡事比别人多一点点！多一点努力，多一点自律，多一点实践，多一点疯狂。多一点点就能创造奇迹！）always have a dream forget about the days when its been cloudy, but dont forget your hours in the sun.forget about the times youve been defeated, but dont forget the victories youve won.forget about the misfortunes youve encountered, but dont forget the times your luck has turned.forget about the days when youve been lonely, but dont forget the friendly smiles youve seen.forget about the plans that didnt seem to work out right, but dont forget to always have a dream.永不放弃梦想忘掉你的失意日子，但不要忘记黄金的时光。忘掉你的一次次失败，但不要忘记你夺取的胜利。忘掉你遭遇的不幸，但不要忘记你的时来运转。忘掉你的孤独日子，但不要忘记你得到的友善的微笑。忘掉你没有得以顺利实施的计划，但不要放弃你的梦想。

特别赠言：让我们牺牲一些娱乐的时间、牺牲一些无聊的时间、牺牲一些闲聊的时间、牺牲一些为自己的穿着打扮苦恼的时间、牺牲一些思考如何吃的时间、牺牲一些打麻将的时间！让我们多一些反思自我、改造自我的时间！人一生总要成就一些事情！说一口流利的英语就是一件非常值得做的事，而且是一定可以做好的事！从中找到自己的快乐吧！找到自己的信心吧！找到自己的价值吧！找到奋斗的快感吧！找到克服重重困难的幸福吧！我只要有三顿

饭吃，我就感到无比幸福和满足，我将不会再去考虑其它的东西！我只有一个心思：一定要讲一口流利的英语！我就不信我做不到！在这种状态下，你肯定成功！你肯定会拥有一切你需要的东西，你想拒绝都没有办法！你想庸俗都没有选择！成功、名誉、财富！一切都随之而来！而那些天天在想他们自己未来需求的人，最终也只能白日做梦，越做越远！让我们将我们的欲望集中在一个地方，那就是早日攻克英语！一旦成功，你的人生历史一定会重 in my 18 years of life, there have been many things.university days are the best part of them.i can never forget the days when i stepped into my university.i was impressed by its garden-like campus, its enthusiastic students and especially its learning atmosphere.i at once fell in love with it.after the arduous military training, i get absolutely absorbed in my studies.the classes given by the teachers are excellent.they provide us with information not only from our textbooks but from many other sources as well.they easily arouse my insatiable desire to take in as much as i can.frankly speaking, at first i had some difficulty following the teachers.however, through my own efforts and thanks to my teachers guidance, i made remarkable progress.now ive benefited a lot from lectures and many other academic reports.learning is a long process;ill keep exploring in the treasure house of knowledge to enrich myself.this summer i got out of the ivory tower and entered the real world.at the beginning i was belittled by my colleagues.but they were really surprised when i translated seven english articles over 5,000 words on only one day.gradually, they began to look at me with respectful eyes.in their opinion i turned out to be a useful and trustworthy colleague.mission as college students and the hope of their motherland.译文:享受生活、牢记使命

在我这18年的生命中，有着许多美好的经历，而大学生活则是其中最难忘的一段。我永远不会忘记刚刚跨进大学校园的那几天:花园一样的校园，热情活跃的学生，特别是那里的学习气氛，给我留下了深刻的印象。hxen恒星英语学习网

经过了一段艰辛的军事训练后，我完全融入到了学习中。老师的讲课真是棒极了。他们传授给我们的不仅是课本上的知识，还包括其他各种各样的信息。我渴望获得尽可能多的知识，是老师激发起了我这个不能满足的欲望。hxen恒星英语学习网

坦率地说，一开始我还不能跟上老师的讲课。但是，通过我自己的努力以及老师的指导，我取得了巨大的进步。我从老师的授课和其他许多学术报告中获益匪浅,恒星英语学习网

学习是个循序渐进、长期的过程，我会在知识的宝库中不断探索，丰富自我。今年暑假，我跨出象牙塔，进入并接触到了真正的社会。一个出版社给了我编辑和校对的兼职工作。工作初期，同事们都礁不起我。但是，当我在一天之内翻译完7篇(总字数超过5000字)的英语文章后，他们真的是hxen恒星英语学习网

大吃一惊。渐渐地，他们开始用尊敬的眼光看待我。他们认为，我变成了一个有用并值得信赖的好同事。hxen恒星英语学习网 我也同样意识到，只有那些为别人带来幸福的人才能真正的幸福。因而，我经常参加有关公众福利享业的活动。有一次，我和同学去了一个贫痔的山区村庄。在那里，我们教那些没钱上学的孩子。我向他们展示了一幅宽广、文明的外部世界的画面，但同时我也被那些孩子学习的渴望、他们的真诚和纯洁深深打动了。在我们离开的那一天，我那不争气的眼泪禁不住流了下来。这次珍贵的经历让我们这些未来的教师意识到了自己肩上的责任重大。除了学习和社会实践，我还经常参加娱乐活动。我每天都锻炼身体，希望保持健康和充满活力。我们还在业余时间写剧本并排练演出。

园生活是最丰富多彩的。但是，不同的人有着不同的选择。大多数的学生珍惜他们的美好时光，并殷切希望将来能出类拔萃。可是，的确有学生无动于衷。他们聚在一起吃喝玩乐;他们忙于追求异性朋友;他们完全忘记了自己作为大学生的使命和祖国对他们的厚望。最后，我希望每个人都能尽最大努力成为国家的有用人才。

第三篇：英语科技论文翻译

3G TECHNOLOGY Abstract The 21 century is an ages of the information economy, being the 3G TECHNOLOGY of representative technologies this ages, will be at very fast speed develop soon in continuously creatively, and will go deep into the people's work, life and study.Therefore, control this technology and then seem to be more to deliver the importance.Now I mainly introduce some knowledge of the 3G TECHNOLOGY.Keywords GPRS, TD-SCDMA，WCDMA , EDGE ,CDMA2000 , WAP , SYMBIAN G, the third Generation, known as the Chinese meaning is refers to the third Generation of digital communication.The growth of the global 3G was rapidly in recent years.From 2002 to 2008, the 3 G operators have been gradually from the original is pale and management to the accelerated development.By June 2008, global 3 G users accumulative total up to 709 million, the total 84 countries and regions issued 3 G licenses, including effective certificate for 249 copies.Our country of 3 G development is relatively later than the advanced countries.In 2009, China was officially forward 3 G time.In the economic crisis of the downturn state，China's ministry of information industry issued three third generation mobile communication(3 G)license for China mobile, China telecom and China Unicom.China Mobile use our country with independent intellectual property rights of the 3 G standard TD-SCDMA , China Telecom get CDMA2000 license and China Unicom WCDMA license.2009 as China 3 G formal first commercial.Although the technology behind 3G may seem complicated, the ways in which 3G will affect all of our lives are easy to imagine.Just imagine having a combined camera, video-camera, computer, stereo, and radio included in your mobile phone.Rich-media information and entertainment will be at your fingertips whenever you want anywhere there is a wireless network.Mobile communication is moving from simple voice to rich media, where we use more of our senses to intensify our experiences.But not all of this will happen at once.3G is an evolution to a communications ideal that no one completely understands yet.What we do know is that mobile multimedia will hit the Japanese markets in 2001, and Europe and North America will follow soon after.3G brings together high-speed radio access and IP-based services into one, powerful environment.The step towards IP is vital.IP is packet-based, which in simple terms, means users can be “on line” at all times, but without having to pay until we actually send or receive data.The connectionless nature of IP also makes access a lot faster: file downloads can take a few seconds and we can be connected to our corporate network with a single click.3G introduces wideband radio communications, with access speeds of up to 2Mbit/s.Compared with today's mobile networks, 3G will significantly boost network capacityAt home 3G is going to affect our home and social lives in many ways.The services that 3G enables will help us to manage our personal information, simplify tasks such as grocery shopping, make better use of our time and offer services that are just fun to use.Operators will be able to develop myriad new service opportunities to attract and retain new customers.Here are some examples:

· You're sitting on a train and use this “dead” time to log on to your bank account, check your balance and pay a few billsAt work

3G will not just support the needs of businesspeople who travel a lot, but will also help new, flexible working practices, such as home-working and remote access to corporate networks outside traditional working hours.Businesspeople are often high-volume airtime users, so they represent a big opportunity for mobile operators.Here are some examples:

·

At work you receive a message from your “smart” refrigerator at home.The message tells you that certain items need restocking and an order has already been prepared for the local grocery store, which you can approve, so that your groceries are ready to collect on the way home.·

You are on the road, and urgently need to discuss a draft presentation with a number of colleagues back in the office.Pulling into a service station, you use your 3G device to hold a telephone conference with your colleagues and, at the same time, you can all view the draft presentation and make changes on line.·

A maintenance engineer is repairing some equipment on a client's premises and hits a problem.Using his 3G device, he contacts his department and downloads a demonstration video that guides him through the repair process.TECHNOLOGY 3G brings together two powerful forces: wideband radio communications and IP-based services.Together, these lay the groundwork for advanced Mobile Internet services, including personalized portals, “infotainment”, mobile commerce and unified messaging-encompassing high-speed data, superior quality voice and video and location-based services.Making 3G a reality depends on technology developments in different areas.These include

amendments to the radio interface to support wideband communications and in the core network.Supporting technologies, such as WAP and Bluetooth, also have an important role to play.This section provides a brief overview of some of the main technologies and developments involved.Ericsson supports all of these technologies and has played an active role in their development.·GPRS General Packet Radio Service(GPRS)is an enhancement to existing GSM and TDMA networks that introduces packet data transmission, enabling “always on” mobility.This means that users can choose to be permanently logged on to e-mail, Internet access and other services, but do not have to pay for these services unless sending or receiving information.When EDGE is added to GPRS, these data rates will increase up to 384kbit/s.GPRS will be implemented by adding new packet data nodes and upgrading existing nodes to provide a routing path for packet data between the mobile terminal and a gateway node.The gateway node will provide interworking with external packet data networks for access to the Internet and intranets.Benefits:

·Faster data speeds and “always on” mobility ·Almost instantaneous connection set-up

·Connection to an abundance of data sources around the world, through support for multiple protocols, including IP

·A step towards full 3G services.·TD-SCDMA All called Time Division-Synchronous CDMA , this standard is formulated by mainland China alone the 3 G standard.On June 29, 1999, the China telecom science and technology and telecommunications research institute(Datang Telecom)to the ITU, but technical invention father put forward in Siemens AG.TD-SCDMA has the characteristics of low radiation, known as the green 3 G.This standard will intelligent wireless, synchronous CDMA and software radio today the international leading technology into which, in spectrum use efficiency, the business support for flexibility, frequency flexibility and cost, and other aspects of the unique advantages.In addition, because of the huge market in China, the standard by the major telecommunications equipment manufacturer to the attention of the world, more than half of the equipment factory now announced that can support TD-SCDMA standards.This standard is made after 2.5 of the intermediate links, and the generation of directly to the 3 G transition, so it is suitable to GSM system to 3 G to upgrade.Military communication network is the core of TD-SCDMA task.·WCDMA

Wideband Code Division Multiple Access(WCDMA)is a wideband radio technique that provides far higher data rates than other radio techniques available today, up to 2Mbit/s, and highly efficient use of radio spectrum.The higher bandwidth that WCDMA provides will deliver the full potential of 3G.For example，WCDMA allows simultaneous access to several voice, video and data services at once.WCDMA is fully compliant with IMT-2000 and is the air interface technology for standards in the 2GHz bandwidth(the IMT-2000 core band), known as UMTS(Universal Mobile Telecommunication System)in Europe and ARIB(Association of Radio Industry Businesses)in Japan.Ericsson has been at the forefront of WCDMA development.The company delivered an experimental WCDMA system to NTT DoCoMo in Japan back in 1998.Ericsson has also set up WCDMA test systems around the world.At 2000, Ericsson announced its first family of WCDMA base stations.·EDGE

Enhanced Data Rates for Global Evolution(EDGE)enables GSM and TDMA operators to offer 3G services using existing network frequencies.By making changes and additions to standardization of evolutionary phases of the air interface and the backbone networks, as well as the migration to ALL-IP and multimedia networks.·CDMA2000 CDMA2000 is a decidedly efficient 3G standard for the delivery of high bandwidth data and high capacity voice services.The evolution of the cdma2000 standard will enable mobile systems to offer data throughputs of 2 Mbit/sec and beyond.The higher bandwidth that cdma2000 provides will deliver the full potential of 3G.For example, cdma2000 also allows simultaneous access to several voice, video and data services at once.CDMA2000 is fully compliant with IMT-2000 requirements for 3G.CDMA2000 will be implemented in the existing frequency bands of CMDA and TDMA at 800 and 1900 MHz, as well as in new spectrum at 2GHz in Japan.Ericsson is a leader in cdma2000 development, and a key driver in the standardization of evolutionary phases of the air interface and the backbone networks, as well as the migration to ALL-IP and multimedia networks.·Bluetooth

Bluetooth is an open standard for two-way, short-wave radio communications between different devices.It marks the end of cables and cords between mobile phones, palmtops, portable PCs and printers, for example.Furthermore, Bluetooth enables information between such devices to be synchronized.Diary information held on a PDA can be updated automatically when within range of a Bluetooth-enabled PC.Bluetooth is also going to be important for machine-to-machine communicationshundreds of companies are members of the worldwide WAP Forum。The latest version of the WAP standard, WAP 1.2.1, has recently been launched.Our dedicated WAP consutants are ready to assist operators and service providers sharpen their competitive edge.They help today's businesses adapt to the new economy and create cost-effective, innovative ways to communicate with customers.What will 3G give us

People will enjoy the 3G time what services it provide, the image of that, 3G is video conference on that plane;3G is patients receive timely assistance of medical experts;3G is fans will not miss the NBA basketball game;3G is to share with friends your beautiful vacation in Hawaii.· more and more 3G video phone

All along, we use QQ, MSN chat with friends remotely.As the mobile data transfer rate, image processing, transmission, mainly the acceptance of such display devices makes mobile video chat stranded.3G time to rely on high-speed 3G data transmission network, which 3G mobile phone users can “face to face” conversation.Through mobile video, As far away from the mother via cell phone together, were falling through the mobile phone lovers can meet again.·3G Push into the mobile phone shopping blowout Use the mobile internet shopping is a new way to shop, mobile shopping not only will be able to let consumer buy goods but also makes the satisfaction convenient for consumers to pick and choose goods compared with the constant.With the improvement of China's 3G network , more and more users will choose to phone shopping patterns.China's mobile phone shop will grow rapidly in a period.Online businesses not only include clothing, books, cell phones, toys, audio-visual products and other daily goods put on the network shelf, cars, laptop computers, jewelry and other luxury goods are also options for the list.One need only log out of 3G mobile phone shopping website of product information, we can buy our favorite items.Online shopping is not only cheaper than the mall , better able to send home delivery.If not satisfied can return on schedule, on-line business integrity committed to ensuring that the consumer's shopping safety.·Broadband Internet access to mobile phones to be a “small computer” Although China has just begun the road to 3G, broadband internet access business has been a bright spot, we can send and receive voice messages on the phone, write a blog, chat, search, download and so on, as well as top-notch services such as online games, mobile navigation, online chat and so on.·the key to the Mobile Office-OA system Although compared with traditional office, automation system greatly improves the working efficiency.However, the limitations of the region's OA system is limited to local area network applications, this office brings to enterprises a lot of inconvenience.Mobile office can keep in touch with units and complete work in anytime and at anywhere.3G mobile phones can download and install office, java and other office software, office software and hardware will be the traditional “compression” in the palm of a large mobile phone.·LCD TVs will be included in Mobile TV Mobile TV is to use with the operating system and streaming video-enabled smart phones to watch TV business.It is a multimedia that use CMMB technology, whether it is GPRS mobile phone or CD-MA1X phone, need to be equipped with mobile terminal operating system to install the appropriate player software.TV programs from the corresponding mobile communication company or by the corresponding SP to organize and deliver.Despite the development of a thriving scene 3G, but because mobile streaming media software, smooth video images and other technical aspects of picture quality there are some problems, Mobile TV strides also takes some time.3G技术

摘要：

21世纪是信息经济的时代，作为这个时代的代表技术，3G技术将在非常快的速度发展很快，不断创造性地将进入人们的工作，学习和生活中深。因此，控制这种技术，然后似乎更有重要性。现在，我主要介绍一些3G技术的知识。

关键字：探地雷达，TD-SCDMA，WCDMA，边缘，CDMA2000，桅索制动器，操作系统使用的手机设备

3G，全称为3rd Generation，中文含义就是指第三代数字通信。全球3G近年来快速成长，从2002年到2008年，全球3G运营商已经逐步从最初的惨淡经营转为现在的加速发展，截止2008年6月，全球3G用户累计已达到7.09亿，全球共有84个国家和地区发放了3G许可证，其中有效证为249张。

我国3G发展相对先进国家比较晚，2009年我国才正式迈进3G时代，在经济危机低迷的状态下，2009年1月7日，中国工业和信息化部为中国移动、中国电信和中国联通发放3张第三代移动通信（3G）牌照。中国移动使用我国具有自主知识产权的3G标准TD-SCDMA，中国电信获得CDMA2000牌照，中国联通获得WCDMA牌照。2009年成为中国3G正式商用年。

虽然在 3 G 后面的技术可能很复杂, 但是3 G 将会在我们生活中产生的影响是我们可以想象的。仅仅想像在你的行动电话中加入照相机、摄像机、计算机、音响以及收音机功能。这样，无论何时何地你都将能够通过无线网络获得大量的媒体信息和娱乐。

移动通信正在由单一的语音通信向多媒体方向发展,通过此途径来加深我们对外界的感觉。

但不是这全部都将立刻发生。至今为止没有一个人能够完全掌握3G的发展的进程。我们唯一确信的是2001年多媒体移动通信将冲击日本市场，而且欧洲和北美也将很快发展多媒体通信市场。

3G在带来高速的语音通路之外还集以IP为基础的服务为一身,有强大的发展环境。向IP方向发展是至关重要的。IP技术是以简单的数据包传输为基础的, 可以使用户同时上网，但是不必花钱除了我们发送或接收数据。IP 的自然无连接性可以大大提高存取速率: 文件下载只需要很短的时间，而且只需轻轻一点就能和网络连接上。

3G采用多频率通信技术,并且达到 2 Mbit/s 的通路速度。与现在的移动网络相比较,3G将会极大的提高网络容量-因此将能够支持更多的使用者, 同时能够提供更多复杂的服务。3 GSynchronous CDMA(时分同步CDMA)，该标准是由中国大陆独自制定的3G标准，1999年6月29日，中国原邮电部电信科学技术研究院（大唐电信）向ITU提出，但技术发明始祖于西门子公司，TD-SCDMA具有辐射低的特点，被誉为绿色3G。该标准将智能无线、同步CDMA和软件无线电等当今国际领先技术融于其中，在频谱利用率、对业务支持具有灵活性、频率灵活性及成本等方面的独特优势。另外，由于中国内的庞大的市场，该标准受到各大主要电信设备厂商的重视，全球一半以上的设备厂商都宣布可以支持TD—SCDMA标准。该标准提出不经过2.5代的中间环节，直接向3G过渡，非常适用于GSM系统向3G升级。军用通信网也是TD-SCDMA的核心任务。· WCDMA

宽带码分多址接入技术(WCDMA)提供的数据传送速率远远大于现在我们采用的通信方式,提供高达2Mbit/s的传输速率, 大大提高了光纤对语音信号的传输率。3G提供更宽的带宽是3G中存在的巨 大的潜能。例如，WCDMA能够使语音信号、视频信号和数据同时进行传输。

WCDMA完全遵照了IMT-2000提出的2GHz带宽标准(IMT-2000中心带宽),就像是在欧洲采用的UMTS(全球的移动传输系统)和日本采用的ARIB(语音信号工业标准联盟)。

爱立信在WCDMA的研发方面走在了前列。公司早在1988年就在日本为移动通信网络开始了WCDMA的实验活动。爱立信已经在全球建立了WCDMA的测试系统。在2000年，爱立信

宣布了他建立了WCDMA的基站。·EDGE 全球革命性的提高传输速率将是原来的GSM和TSMA运营商利用现有的设备提供3G服务。通过制定新的通信附加标准来对无线通信和网络中枢进化标准化,同时改革所有的IP业务和多媒体网络。· cdma2000 cdma2000对于提高宽带传输速率和递送高质量的语音服务无疑是3G标准最有效率的。cdma2000标准的发展将会使移动通信系统能够提供2Mbit/sec的数据传输率甚至超过这个标准。cdma2000提供的带宽向我们展示了3G的潜能。举例来说，cdma2000允许同时的传输多组声音图像数据。

cdma2000完全融合了IMT-2000标准，并且满足了3G的标准。cdma2000可以通过现有的CMDA和TDMA在800到1900 MHz的频段上实现,就像日本在2GHz的光谱中实现。

爱立信是cdma2000研发的先行者,它制定了对无线通信和网络中枢进行改革的新标准,同时也提出了对IP和多媒体网络进行改革的意见。· 蓝牙

蓝牙是在不同的装置之间进行双通道短波传输的公开标准。举例来说,它的出现标志着通过电缆进行移动通信连接掌上电脑或笔记本电脑的时代已经过去。此外，蓝牙能够说数据传输同步化。存储在智能数字助理上的日程表可以在个人计算机中蓝牙能够达到范围里面自动更新。蓝牙将成为通信领域中用于不同设备之间传输数据最重要的手段，同时它也将成为发展最快的发展领域。

蓝牙技术是终端和其他设备使用移动通信网络的关键。蓝牙即可应用到现在的2G网络也可以支持3G系统,它将会在未来的移动通信中占据越来越重要的地位。爱立信已经研制出了蓝牙装置,包括T36蓝牙手机和蓝牙掌上设备。

蓝牙是由爱立信公司首先研制的,但现在蓝牙主要是由一个特殊的世界组织来主管。此技术已在所有电信器械生产商、计算机制造商以及芯片制造商中普及。· Symbian Symbian是一个被包括爱立信，诺基亚，摩托罗拉和 Psion公司共同投资的项目。Symbian的目标是通过以下两种方式提高其在移动通信市场的份额: · 第一, 通过发展软件的核心，优化系统结构，进一步的研发手机通信设备工具(例如个人数传助手，小巧的手机和通信器材)。

· 第二,制定移动设备传输信息的标准。Symbian的EPOC操作系统已经研制成功，而且爱立信已经在R380中使用了EPOC操作系统。· 无线传输通讯协定

无线传输通讯协定(无线传输通讯协定)是一个全球性的协议，是通过移动设备访问英特网的公开标准。它可以使用户通过移动设备例如手机和便携设备访问整个移动网络和受据库服务商,不用用不同的设备完成这些任务。

无线传输通讯协定允许统过建立“无线传输通讯协定微型浏览器”组织电话信息的方向, 同样地网络浏览器经由英特网-个人计算机提供在线服务。典型地，无线传输通讯协定监控屏将会显示各种不同的服务或数据入口的若干超链接。

和采用无线传输通讯协定的手机一样,爱立信也已经宣布研制出一种无线传输通讯协定来服务开发者的装备(WapIDE)和无线传输通讯协定出入口/代理,用移动的网络在英特网和局域网络环境中来桥接无线传输通讯协定申请和服务。除此之外，爱立信提供应用专利, 像是爱立信本土化了英特网(ELI)给本地服务 , 提供时间和发展环境给无线传输通讯协定申请的无线传输通讯协定应用服务商。

爱立信是无线传输通讯协定论坛的四个最初成员之一。自从 1997 以后，当它成立的时候, 无线传输通讯协定论坛已经得到广泛的工业厂商的支持，他们大部分都是是世界无线传输通讯协定论坛的成员。最新版的无线传输通讯协定标准，无线传输通讯协定 1.2.1,刚刚被开发出来。

我们将尽全力来推进无线传输通讯协定，准备协助运营商和服务提供商在竞争中处与更有利的地位。这有助于我们调整现今的业务来适应新经济的发展，更有效的利用资源，用创新的方法与客户沟通。

3G能给我们带来什么

3G时代人们将会享受到他为我们提供的哪些服务呢，形象的说，3G就是飞机上的视频会议；3G就是病人接受及时救助的医学专家；3G就是篮球迷不会错过的NBA比赛；3G就是与朋友共享你在夏威夷的美好假期。· 视频手机因3G勃兴而扬帆启航

一直以来，我们通过QQ、MSN等视频聊天功能，与亲朋好友进行远程视频聊天。由于手机数据传输速率、图像处理传输、接受显示设备等达不到要求使得手机视频聊天搁浅。3G时代依靠3G网络的数据高速传输，从而3G手机用户可以“面对面”交谈。通过手机视频，相距万水千山的母子能够通过手机相聚，分别日久的恋人能够通过手机重逢。· ３Ｇ推动手机购物进入井喷期

用手机上网购物是一种新的购物方式，手机购物不仅让消费者足不出户就能买到满意商品 更使得消费者能够方便快捷的对商品进行挑选比较，随着我国3G网络的不断完善，越来越多的用户将会选择手机购物模式。我国的手机购物将会迎来一个高速增长期。

网上商家不仅将服装、图书、手机、玩具、音像制品等日常商品摆上网络货架，汽车、笔记本电脑、珠宝等高档商品也在备选之列。人们只要拿出３Ｇ手机登陆购物网站查询商品信息，就能够买到心仪的物品。网上购物价格不仅比商场便宜，更能够送货到家，如果不满意可以按期退货，网上商家诚信承诺保证了消费者的购物安全。· 宽带上网使手机成为“小电脑”

虽然中国的3G之路刚刚开始，宽带上网已是亮点业务，我们能在手机上收发语音邮件、写博客、聊天、搜索、下载等，还有拔尖业务，如网络游戏、手机导航、网上聊天等。· 手机办公—OA系统桎梏开启的钥匙

传统自动化办公系统虽然较之从前大大提高了办公效率，然而区域的局限使的 OA系统仅限于应用局域网，这给企事业单位办公带来了很多的不方便。手机办公可以随时随地与单位的信息系统保持联系，完成办公功能越来越受到人们的青睐。３Ｇ手机可以下载安装office、java等办公软件，将传统办公软硬件“压缩”在手掌大的手机上。· 手机电视将液晶电视收入囊中

手机电视是利用具有操作系统和流媒体视频功能的智能手机观看电视的业务，它是利用CMMB技术推出的便携式的移动的多媒体，不管是 GPRS手机还是CD－

MA1X手机，都需要在装有操作系统的手机终端上安装相应的播放软件，而相应的电视节目则由移动通信公司或者通过相应的SP来组织和提供。尽管３Ｇ发展一片欣欣向荣的景象，然而由于手机流媒体软件，视频影像的流畅、画面质量等技术方面存有问题，手机电视大踏步前进还需要时日。

河南科技学院

信息工程082班

零三七八作品

第四篇：关于科技的英语演讲稿

关于科技的英语演讲稿—technology and future the presence of students, ladies and teachers, everyone!i was prepared intervals of cloud today, in honor here entitled technology and future speech, i am very proud of both, but some unease.in recent years, we have seen our great motherland, the cause of the rapid development of technology, which allow me to a chinese i feel very proud.remember that long ago, cell phone use almost the only one, which is called, but a few years ago, cell phones has undergone great changes, not only look more beautiful, but also use more, you can use the phones to take pictures, meetings, internet, text messages, etc.a series of things that i their life more convenient, so i am more aware of the strength of the technology, but i am just a fledglings students, technology as the word also aware of the limited, i am unable to use some very difficult theory to elaborate technology xuanji, no right to work on their elders i can promise of the technology blueprint.but i am willing to use a student’s perspective to the imagine technology and the future.from genetic engineering is a live princes dream, nano-technologynot only technological change destiny, can change the future.challenges, but we will not give up that easily, we use our youth to predecessors vowed: never live up to their predecessors of our hope.looking back at the history of civilization, anderson is the history of mankind against the darkness of ignorance, is the 参考翻译：

在场的学生们，女士们，老师，大家好！我准备间隔云今天，为了纪念在这里题为“科技与未来”的讲话，我感到非常自豪的两个，但有些不安。近年

来，我们已经看到我们伟大的祖国，事业的迅速发展，技术，请允许我向中国我感到非常自豪。请记住，很久以前，手机应用几乎只有一个，这是所谓的，但在几年前，手机发生了很大变化，不仅看起来更漂亮，而且还更多地使用，您可以使用手机拍照，会议上，互联网，短信等一系列的事情，我的生活更方便，所以我更多地了解的力量，技术，但我只是一个幼鸟学生，“技术”作为也知道这个词的有限，我无法使用一些非常困难的理论阐述技术xuanji，没有权利对他们的长辈的工作我可以保证的技术蓝图。但我愿意利用学生的观点，以创新技术和未来。

从基因工程“是一个生活王子”的梦想，纳米技术“不洗你的衣服，”承诺，从人工智能“会给你一个可爱的机器狗”热情，转基因技术“让人们增长鼠标耳朵”奇观。这项新技术的诞生，一种新技术，将让人们欣喜若狂，因为这些新技术正在逐步改善我们的生活，让我们更多地了解自己。在近期内，中国完成了其第一个sars病毒基因组测序，sars是目前世界上最大的承认危险的疾病，但我们为什么不把其他国家完成第一次，我们刚刚完成的国家？很简单，这说明我们的国家比其他国家落后，不如别人，我们回顾过去，刚刚开始了一个国家的改革开放和当前的科技水平已经导致一个大国，我们的祖国经历了一些的跌宕起伏，有多少困难和坎坷，但我们仍然回到所有的祖国，祖国，因为我们坚信，-不仅是技术变革的命运，可以改变未来。我们这代人，一般感情的社会是一个强烈的竞争，学习一英尺下降。科学知识是我们关注的焦点，爱因斯坦，和斯蒂芬霍金，比尔盖茨是明星我们想到，计算机科学，物理学和化学的现代活力正在不断影响着我们。我们必须理解技术的重要性，知道该技术具有普遍性。

虽然技术创建一个新的生活前景征求思想，鼓舞人心的。然而，归根结底是要靠我们共同的努力，以实现。作为未来建设的骨干，我们这一代年轻人肩上的负担并不轻，新的机遇总是伴随的风险和挑战，但我们不会轻易放弃，我们用我们的青年前任誓言：决不辜负他们的前辈，我们的希望。

回首文明史上，安德森是人类历史上的黑暗的无知，是科学点燃了大火在肆虐人类灵魂的希望；技术支持文明，科学和技术，创造未来，但未来在我们的手中。让我们成为知识的探索者，让我们未知的道路上漫游，让我用我们的创造力，我们生活的世界变得更美好。

第五篇：关于科技的英语演讲稿—TechnologyandFuture

the presence of students, ladies and teachers, everyone!i was prepared intervals of cloud today, in honor here entitled “technology and future” speech, i am very proud of both, but some unease.in recent years, we have seen our great motherland, the cause of the rapid development of technology, which allow me to a chinese i feel very proud.remember that long ago, cell phone use almost the only one, which is called, but a few years ago, cell phones has undergone great changes, not only look more beautiful, but also use more, you can use the phones to take pictures, meetings, internet, text messages, etc.a series of things that i their life more convenient, so i am more aware of the strength of the technology, but i am just a fledglings students, “technology” as the word also aware of the limited, i am unable to use some very difficult theory to elaborate technology xuanji, no right to work on their elders i can promise of the technology blueprint.but i am willing to use a student’s perspective to the imagine technology and the future.from genetic engineering “is a live princes” dream, nano-technology “-not washing your clothing,” promises;from artificial intelligence “will give you a cute robot dog” warm, transgenic technology “let people grow mouse ears” wonders.the new technology in the birth of a new technology that will let people wild with joy, because these new technologies is gradually improving our lives, let us learn more about ourselves.in the near term, china completed its first sars virus genome sequencing, sars is now the world’s largest recognized the dangers of the disease, but why not other countries completed first, and we just completed the countries? very simple, this illustrates that our country backward than others, worse than others, we look at the past, had just started a country’s reform and opening up to the current level of science and technology has lead a large country, our motherland experienced a number of ups and downs, how many difficulties and bumpy however, we still back all of the motherland, the motherland because we firmly believe that-not only technological change destiny, can change the future.for our generation, the general feeling of the community is a strong sense of competition, learning a foot down.science knowledge is the focus of our attention, albert einstein, and stephen hawking, bill gates is the star we have in mind, computer science, physics and chemistry of modern dynamic is constantly affect us.we have to understand the importance of technology, know that the technology universal.although technology to create a new life prospects soliciting thoughts, inspiring.however, the final analysis is that we rely on our common efforts to realize., as the future construction of the backbone of our generation of young people shoulders the burden is not light, new opportunities are always accompanied risks and challenges, but we will not give up that easily, we use our youth to predecessors vowed: never live up to their predecessors of our hope.looking back at the history of civilization, anderson is the history of mankind against the darkness of ignorance, is the scientific lit a fire in the raging human soul of hope;technology support civilization, science and technology to create the future, but the future is in our hands.let us become knowledge explorers, let us unknown roaming on the road, let me use our creativity to the world we live a better place.参考翻译：

在场的学生们，女士们，老师，大家好！我准备间隔云今天，为了纪念在这里题为“科技与未来”的讲话，我感到非常自豪的两个，但有些不安。近年来，我们已经看到我们伟大的祖国，事业的迅速发展，技术，请允许我向中国我感到非常自豪。请记住，很久以前，手机应用几乎只有一个，这是所谓的，但在几年前，手机发生了很大变化，不仅看起来更漂亮，而且还更多地使用，您可以使用手机拍照，会议上，互联网，短信等一系列的事情，我的生活更方便，所以我更多地了解的力量，技术，但我只是一个幼鸟学生，“技术”作为也知道这个词的有限，我无法使用一些非常困难的理论阐述技术xuanji，没有权利对他们的长辈的工作我可以保证的技术蓝图。但我愿意利用学生的观点，以创新技术和未来。

从基因工程“是一个生活王子”的梦想，纳米技术“不洗你的衣服，”承诺，从人工智能“会给你一个可爱的机器狗”热情，转基因技术“让人们增长鼠标耳朵”奇观。这项新技术的诞生，一种新技术，将让人们欣喜若狂，因为这些新技术正在逐步改善我们的生活，让我们更多地了解自己。在近期内，中国完成了其第一个sars病毒基因组测序，sars是目前世界上最大的承认危险的疾病，但我们为什么不把其他国家完成第一次，我们刚刚完成的国家？很简单，这说明我们的国家比其他国家落后，不如别人，我们回顾过去，刚刚开始了一个国家的改革开放和当前的科技水平已经导致一个大国，我们的祖国经历了一些的跌宕起伏，有多少困难和坎坷，但我们仍然回到所有的祖国，祖国，因为我们坚信，-不仅是技术变革的命运，可以改变未来。

我们这代人，一般感情的社会是一个强烈的竞争，学习一英尺下降。科学知识是我们关注的焦点，爱因斯坦，和斯蒂芬霍金，比尔盖茨是明星我们想到，计算机科学，物理学和化学的现代活力正在不断影响着我们。我们必须理解技术的重要性，知道该技术具有普遍性。

虽然技术创建一个新的生活前景征求思想，鼓舞人心的。然而，归根结底是要靠我们共同的努力，以实现。作为未来建设的骨干，我们这一代年轻人肩上的负担并不轻，新的机遇总是伴随的风险和挑战，但我们不会轻易放弃，我们用我们的青年前任誓言：决不辜负他们的前辈，我们的希望。

回首文明史上，安德森是人类历史上的黑暗的无知，是科学点燃了大火在肆虐人类灵魂的希望；技术支持文明，科学和技术，创造未来，但未来在我们的手中。让我们成为知识的探索者，让我们未知的道路上漫游，让我用我们的创造力，我们生活的世界变得更美好。