研究生外文文献翻译--中英完整版教学教材

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研究生英语精读教程课文原文+翻译+短文unit4

研究生英语精读教程课文原文+翻译+短文unit4

Einstein's Painful RomanceWalter SullivanThe story of an anguished love affair between Albert Einstein and the woman who would later become his first wife has emerged in newly disclosed correspondence between them.新近披露的艾伯特·爱因斯坦与意中人(此人后来成为他的元配)之间的来往信件,向人们展示了这对情侣饱含辛酸的爱情经历。

Many of the letters describe the love between the young scientist and his future wife, Mileva Maric; the pain associated with his mother's vehement disapproval of the relationship; and their excitement over the impending birth of a child.有许多信件都叙述了这位年轻科学家和他未婚妻米莱娃·玛丽克之间的爱情,叙述了因为爱因斯坦的母亲拼命反对这门亲事而引起他俩的痛苦心情,还叙述了他俩为孩子的即将出世油然而生的兴奋心情。

The fate of the child, a girl, however, remains a mystery. She was born before the couple married in 1903 and there apparently is no record of what became of her.然而,这个女孩后来的命运如何依然是个谜。

她是在这对夫妇于1903年结婚前生下的,而且对她后来的情况显然没有记载。

研究生英语精读教程课文原文+翻译+短文unit3

研究生英语精读教程课文原文+翻译+短文unit3

Rats and Men"Insoluble" ProblemsProfessor N. R. F. Maier of the University of Michigan performed a series of experiments several years ago in which "neurosis" is induced in rats. The rats are first trained to jump off the edge of a platform at one of two doors.If the rat jumps to the right, the door holds fast, and it bumps its nose and falls into a net; if it jumps to the left, the door opens, and the rat finds a dish of food. When the rats are well trained to this reaction, the situation is changed. The food is put behind the other door, so that in order to get their reward they now have to jump to the right instead of to the left. (Other changes, such as marking the two doors in different ways, may also be introduced by the experimenter.)If the rat fails to figure out the new system, so that each time it jumps it never knows whether it is going to get food or bump its nose, it finally gives up and refuses to jump at all. At this stage, Dr. Maier says, "Many rats prefer to starve rather than make a choice."密执安大学的N.R.F. 麦耶教授几年前做过一系列可以诱导鼠产生“神经官能症”的实验。

2018版研究生英语专用教材【精读教程】全文翻译.学术英语.

2018版研究生英语专用教材【精读教程】全文翻译.学术英语.

Unit 2 Energy in Transition能源转型The era of cheap and convenient sources of energy is coming to an end.A transition to more expensive but less polluting sources must now be managed.能源资源价格低廉、使用便捷的时代已经过去了,目前应向尽管价格较高、但污染较小的资源转变。

John P. HoldrenUnderstanding this transition requires a look at the two-sided connection between energy and human well-being. Energy contributes positively to well-being by providing such consumer services as heating and lighting as well as serving as a necessary input to economic production. But the costs of energy -including not only the money and other resources devoted to obtaining and exploiting it but also environmental and sociopolitical impacts -detract from well-being.1.要了解这一转变,首先需要考察一下能源和人类幸福的双重关系。

能源为人类提供了诸如取暖、照明等消费服务的同时,也为经济生产活动提供必要投入,从这个意义上讲,能源为人类幸福做出了积极贡献。

然而,人类为利用能源所付出的代价却削弱了能源为其带来的利益,这种代价不仅包括为获取和利用能源所投入的资金和其他资源,而且包含了能源开发和利用所产生的环境影响和社会政治影响。

研究生基础综合英语1-4全文(中英文对照)邱少林版

研究生基础综合英语1-4全文(中英文对照)邱少林版

研究生基础综合英语1-4全文(中英文对照)邱少林版Unit One:EducationText:In Praise of the F Word对F的赞美Tens of thousands of 18-year-olds will graduate this year and be handed meaningless diplomas. These diplomas won’t look any different from those awarded their luckier classmates.Their validity will be questioned only when their employers discover that these graduates are semiliterate.今年,将有成千上万的18岁学生毕业并被授于毫无意义的文凭。

这些文凭对每个人都是一样的,没有一点差别,而不管学生的成绩如何.但当雇主发现他们没有实际能力时,文凭的有效性就会被质疑。

Eventually a fortunate few will find their way into educational repair shops-adult-literacy programs, such as the one where I teach basic grammar and writing. There, high school graduates and high school dropouts pursuing graduate-equivalency certificates will learn the skills they should have learned in school . They will also discover they have been cheated by our educational system.即使少数幸运的人找到了成人进修的地方,像我教语法和写作的地方。

英文参考文献及译文

英文参考文献及译文
ABSTRACT
With the goal of developing microfluidic platforms for sensing applications, flash-free micropatterns were embossed in polypropylene surfaces with ultrasonic heating for a biosensing application.The embossed features were designed to act as reservoirs, valves, and reaction chambers to allow, in combination with a compact sensing platform, the monitoring of analyte levels using a standard PC-CD player. To generate the compact sensor, as an example, we chose the photoluminescence (PL)-based detection of lactate and glucose using an OLED-based sensing platform. Once embossed, the surface energy of the plastic substrate was chemically modified to make it hydrophilic. Reagents, placed in separate reservoirs, were directed through burst valves towards a reaction chamber via CD rotation. Lactate or glucose were monitored by measuring the effect of the related dissolved oxygen level on the PL decay time of an oxygen-sensitive dye, following analyte oxidation catalyzed by a suitable specific oxidase enzyme. The results demonstrate the potential of integrating OLEDs as excitation sources in PL-based sensors with microfluidic CD- based platforms, including for simultaneous multiple analyses.

研究生英语教材课文翻译1-6单元

研究生英语教材课文翻译1-6单元
Unit 1
' Ten pence for a view over the bay' . said the old man with the telescope. 'Lovely clear morning. Have a look at the old lighthouse and the remains of the great shipwreck of 1935.' 十便士看一次海湾风光,”那个带着一架望远镜的老头说道:“多么晴朗美丽的早晨。请来看看那古老 的灯塔和 1935 年失事的大轮船残骸吧。” Ten pence was sheer robbery, but the view was certainly magnifi要ce十nt.便 士简直是敲诈勒索,可是海 湾的景色确实壮丽。 Cliffs stretched into the distance, sparkling waves whipped by the wind were unrolling on to the beach, and a
多么严重。” 'Fi y years ago to-night, no light appeared in the tower, and only at two o'clock in the morning did the beam
suddenly start to flash out its warning again. 'The next morning the light was s ll visible. The storm had almost bl own itself out, so a relief boat set out to inves gate. A grim discovery awaited the crew . The men's living-room w as in a horrifying state. The table was over-turned: a pack of playing cards was sca ered everywhere: bloodstains splashed the floor. The relief men climbed the winding stair to the lantern room and there discovered Mar n's bo dy, crouched beside the burning lamp. He had been stabbed and was dead. Two days later, Blake's body was wash ed up. scratched, bruised, and terribly injured.

1外文文献翻译原文及译文汇总

1外文文献翻译原文及译文汇总

华北电力大学科技学院毕业设计(论文)附件外文文献翻译学号:121912020115姓名:彭钰钊所在系别:动力工程系专业班级:测控技术与仪器12K1指导教师:李冰原文标题:Infrared Remote Control System Abstract2016 年 4 月 19 日红外遥控系统摘要红外数据通信技术是目前在世界范围内被广泛使用的一种无线连接技术,被众多的硬件和软件平台所支持。

红外收发器产品具有成本低,小型化,传输速率快,点对点安全传输,不受电磁干扰等特点,可以实现信息在不同产品之间快速、方便、安全地交换与传送,在短距离无线传输方面拥有十分明显的优势。

红外遥控收发系统的设计在具有很高的实用价值,目前红外收发器产品在可携式产品中的应用潜力很大。

全世界约有1亿5千万台设备采用红外技术,在电子产品和工业设备、医疗设备等领域广泛使用。

绝大多数笔记本电脑和手机都配置红外收发器接口。

随着红外数据传输技术更加成熟、成本下降,红外收发器在短距离通讯领域必将得到更广泛的应用。

本系统的设计目的是用红外线作为传输媒质来传输用户的操作信息并由接收电路解调出原始信号,主要用到编码芯片和解码芯片对信号进行调制与解调,其中编码芯片用的是台湾生产的PT2262,解码芯片是PT2272。

主要工作原理是:利用编码键盘可以为PT2262提供的输入信息,PT2262对输入的信息进行编码并加载到38KHZ的载波上并调制红外发射二极管并辐射到空间,然后再由接收系统接收到发射的信号并解调出原始信息,由PT2272对原信号进行解码以驱动相应的电路完成用户的操作要求。

关键字:红外线;编码;解码;LM386;红外收发器。

1 绪论1.1 课题研究的背景及意义红外数据通信技术是目前在世界范围内被广泛使用的一种无线连接技术,被众多的硬件和软件平台所支持。

是一种通过数据电脉冲和红外光脉冲之间的相互转换实现无线的数据收发的技术。

红外收发器产品具有成本低,小型化,传输速率快,点对点安全传输,不受电磁干扰等特点,可以实现信息在不同产品之间快速、方便、安全地交换与传送,在短距离无线传输方面拥有十分明显的优势。

新编研究生英语系列教材英语课文翻译

新编研究生英语系列教材英语课文翻译

结婚礼物伊莉莎白∙埃科诺莫我一直有这样的梦想:星光灿烂的晚上,在一家巴黎咖啡馆能有人向我求婚。

那个咖啡馆就像凡高所画的“夜晚的咖啡馆”,我的画室墙上就挂着一幅此画的翻印本。

然而,我男朋友却是在我用“稳得新”擦洗卫生间镜子的时候叫我嫁给他。

我已经上40岁,是该轮到我了。

我已经体面地让开,眼看着孪生妹妹还有小妹在我之前出嫁。

我做过女傧相7次,伴娘3次。

我的淡颜色塔夫绸衣服比寄物店都多。

我的未婚夫乔治和我都是希腊裔美国人,但是我们想办一个简朴、大方的婚礼。

不需要很多伴娘伴郎。

也不放映幻灯,展示求婚的细节,那太傻了。

这会是一次很温馨的聚会,请的人不多也不铺张,100个左右的宾客吧。

在我们的家族,那算是小圈子内的聚会。

我为一位偏狂的管弦乐队指挥做公关刚刚结束,因而我有很多时间投入到我这个新的项目上。

乔治是药剂师,每周工作60小时,现在又有一份工作:听我嘀咕婚礼一事。

这毕竟是我表现的时候,得由我说着算。

但是,我投入的时间和精力越多,万事就越和我过不去。

没有请到我想要的洛杉矶希腊乐队。

我到教堂时所戴面纱的针线活也很糟,不是我原来所要求的。

我订的象牙色的丝绸礼服被隔离在新加坡的某个地方。

眼看婚礼也就没有几个礼拜了,我邀请的客人大部分在最后期限之后才回信,让我很是烦恼。

之后,我收到妈妈的电话。

她个头娇小,68岁却依然精力饱满。

几天前还为我即将举行的婚礼感到兴奋不已。

她刚去医院做每年的身体检查。

虽然感觉还不错,但被诊断是胃癌。

接下来的几天,问题不再是“举行什么样的婚礼?”,而是“还办婚礼吗?”我把这看成是我的大喜日子。

我认识到没有妈妈的大喜日子根本就不是日子。

老爸已经在三年前过世,不可能牵着我的手到教堂圣坛完婚,这已经让我觉得凄苦。

但是一想到妈妈那天也不能在教堂就让我觉得无法忍受。

几天后,我从纽约市搬回西雅图,延迟了婚礼。

我从操办婚礼转向指导保健。

我已经挑选好歌曲,准备作为我们夫妻首个舞曲,但现在压力那么大,我已经记不起来是哪首了。

研究生英语阅读教程翻译英汉对照

研究生英语阅读教程翻译英汉对照

Lesson 11. For English is a killer. It is English that has killed off Cumbric, Cornish, Norn and Manx. There are still parts of these islands where sizeable communities speak languages that were there before English. Yet English is everywhere in everyday use and understood by all or virtually all, constituting such a threat to the three remaining Celtic languages, Irish, Scottish Gaelic, and Welsh... that their long-term future must be considered... very greatly at risk.因为英语是个杀手。

正是英语造成了康瑞克、康尼施、诺恩、曼科斯等语言的消亡。

在这些岛上还有相当多的人使用在英语到来之前就已存在的语言。

然而,英语在日常生活中无处不在。

所有的人或几乎所有的人都懂英语。

英语对现存的凯尔特语:爱尔兰语、苏格兰盖尔语及威尔士语的威胁是如此之大,它们的未来岌岌可危。

2. He also associated such policies with a prejudice which he calls linguisticism (a condition parallel to racism and sexism). As Phillipson sees it, leading institutions and individuals within the predominantly "white" English-speaking world, have (by design or default) encouraged or at least tolerated—and certainly have not opposed—the hegemonic spread of English, a spread which began some three centuries ago as economic and colonial expansion.同时,他认为这些政策和他称之为语言歧视(和种族歧视、性别歧视的情况类似)的偏见密切相关。

研究生外文文献翻译--中英完整版

研究生外文文献翻译--中英完整版

Discussion about the application of the anchor bar on theslope constructionFu Ming Fu , Zhang TianAbstract:There are some advantages in strengthening slope with the anchor bar, such as low project cost, convenient for construction and so on. It not only meets the requirement of the reliability of the construction, but also is economic and reasonable for the construction.Key words: anchor bar; slope; strengthening1.IntroductionAnchor technique uses strata geotechnical’s shear strength around bolt to deliver structures pulling force or keep strata of the excavation own stability. Due to the use of the anchor rod, Anchor strata produce compressive zone and have reinforcement effect to strata, can enhance the strength of strata, improve mechanical properties of strata, make structure and stratum together formed a kind of work together complex. Anchor system can effectively sustain tension and shear, improve shear strength of the potential sliding surface, so it can effectively prevent slope to produce sliding damage.Fig 1 after excavation of the slope2.Project profileThe length of a slope is about 60m, the most slope height is about 23m,the angle up to 50°~ 75°, a five-layer frame structure buildings is far from about 1.5 to 4m at its base edge, its foundation is artificial bored pile and its bearing stratum is in weathered phyllite. Due to the strong weathering of rocks, it was chunky, loosely structured, multi-muddy filling. It has residual slope deposits of silty clay overlying and local folder with a pulpy, low strength. Slope hadcollapsed at various locations, it is vary dangerous to the building, so we need to reinforce the slope, and we use stone concrete retaining wall and bolt to support it.3.Bolt retaining and protecting design3.1Bolt design(1)all formation of anchor use whole length bond-type, the binder materials are ordinary cement mortar, the mortar strength grade is M30, the anchor length L is 10 meters, the slope height h is 9 meters. Anchoring section length is 5m.(2)According to the construction condition and the needs of the process, the layout form of anchor use quincunx, and in order to make the anchoring force in the role of surface rock surface with uniform, the two adjacent line bolts should be staggered arrangement.(3)The anchor’s number according to /3.24 per meter to calculation, the anchor length is L, a tolal of 252. The diameter of drilling holes is φ90,the number of drill according to (L-0.1)m per hole to calculation, M30 grout number according to average 0.052m3per hole to calculation.(4)The two adjacent rows vertical spacing of anchor take 2.55m, horizontal spacing take 2.55m. The dip angle of anchor: with the angle of horizontal line is 20°, and drilling down with this Angle.(5)Anchor use the steel bar, which is HRB400 level, 28mm diameter.3.2Anchor calculation(1)The calculation of lateral geotechnical pressure[1][2]When the supporting structure to leave in rock and earth mass direction migration until to the limit equilibrium state, the geotechnical pressure which is role in supporting structure called active geotechnical pressure. Its calculation method is as follows:For the slope which has no flare structure surface, generally speaking, failure is controled by rock mass strength, the calculation formula is same to the active soil pressure, but cohesive force C take zero, internal friction angle ϕuse eϕ(rock mass equivalent internal friction angle) instead of, according to the standard to selection; rupture angle is 45°+ϕ/2(ϕis rock mass internal friction angle, is estimationed by haircut at the standard of rock mass internal friction angle, reduction factor according to the standard to selection).According to the engineering survey, active rock pressure can calculation as follows:(2)the calculation of anchor tension design value a Q ak N N γ= (1)(2) In the formula: a N is anchor tension design value; ak N is anchor tension standard value; Q γis partial load factor, take 1.3; tk H is the horizontal tension standard value of anchor; αis the dip angle of anchor.Through the calculation, ak N =112.3kN a N =145.99kN(3)the calculation of anchor steel section area(3) In the formula: S A is the steel section area of anchor; ογ is slope engineering importance coefficient(the slope engineering importance coefficient of this project is level 1, take 1.1); 2ξis the tensile working conditions coefficient of anchor bar ( permanent anchor take 0.69, temporary anchor take 0.92); y f is the tensile strength design value of anchor bar(standard value k y f =400a MP , design value y f =360a MP ).According to the calculation, S A ≥0.5883210m -⨯,choose level 3 steel of 1φ28mm,S A =0.6153210m -⨯.(4)The calculation of anchorage body and rock mass anchoring lengthanchoring length should not only meet the requirements which the bond force of formation on mortar and the bond stress of mortar on steel, but also meet the requirements that the Structure design codes the Minimum anchoring length.(4) In the formula: a l is the anchoring length; D is the diameter of anchorage body; rb f is the bond strength eigenvalue of layer and anchorage body, through the experiment or local experience sure, or according to the standard to selection ( this engineering ’s rock mass uniaxial compressive 2222111209tan (45)2090.217175.77/2222e a aE H K kN m ϕγ︒==⨯⨯⨯-=⨯⨯⨯=cos tkak H N α=2a S yNA f ογξ≥1ak a rbN l Df ξπ≥strength is 7.46a MP , belong to soft rock, rock mass structural plane development, rb f take 300a KP );1ξis the bond working conditions coefficient of anchorage body and layer (permanent anchor take 1.00).According to the calculation, a l ≥4.3m, take a l =5.0m.(5)The anchoring length between anchor steel and anchor mortara l ≥ (5) In the formula: a l is the anchoring length between steel and mortar; d is the diameter of anchor bar; n is the number of steel;b f is the bond strength design value between steel and anchor mortar, through the experiment sure, or according to the standard take 2.40; 3ξ is the working conditions coefficient of steel and mortar bond strength(permanent anchor take 0.60). According to the calculation, a l ≥2.1m ,take a l =5.0m.3.3 The construction technology and key points of anchorThe anchor ’s construction technology is as follows: build-up scaffold ——excavate and clear up the slope surface ——measures to fix position ——drill hole ——washing hole ——bolt put in a certain place ——grout ——colligation the end of the anchor ——flushing the slope surface ——pouring frame space ——Spray seed(1)This slope belong to rocky slope, after excavate the slope 10 cm to the underside of the frame space, set bolt and pouring frame space, then spray grass or seeds after borrowed soil 20 cm in the frame space.(2)the slope should be payed attention to clean up, when construction. The anchor should be placed after wash hole, then put pressure (0.4MPa) and grout. After the mortar fully solidification, colligation steel, cast-in-place reinforced concrete frame space, bend the end of the anchor and bind point by point with the skeleton steel.(3)Before drilling, the hole should be measured to fix position and then do mark. Pitch deviation is less than 150mm, hole depth error is less than 50mm. Try not remold the surrounding rock, when drill. Before Put the anchor, it should be attentioned that blow wash clean the water of the hole and rock powder and so on, and rust removal the body of rod. When grouting, builders 3a bN n df ογξπshould attention the grouting pressure and mortar ratio.Fig 2 anchor field construction drawing4.ConclusionIt is economical to reinforcement slope with bolt, and use the normal equipment, It is not only achieve safe and also economy and rational.(1) Today bolt technology is widely used in the project. It is an effective reinforcement measures to constraints sliding soil with the combining of bolt and concrete slope protection.(2) We must be sure to do geological exploration work of the slope to find out the nature of the rock and hydrogeological situation before reinforcing slope by grouting bolt.(3) Due to the factors of engineering geological conditions, grouting pressure and construction technology, we should be given adequate attention to the quality of construction.Reference[1]Technical code for building slope engineering (JGJ 120-99). The People's Republic nationalstandards. Beijing: China Architecture & Building PRESS.[2] Ying-Ren Zheng, Zu-Yu Chen etc. Engineering Treatment of Slope & Landslide [M]. Beijing:China Communications Press,2007[3] LuoZhenHai. Talk shallowly the application of the anchor at the slope reinforcement[J]. FujianConstruction Science & Technology,2010,06:15-16浅谈锚杆技术在边坡工程中的应用 1.引言锚杆技术是利用锚杆周围地层岩土的抗剪强度来传递结构物的拉力或保持地层开挖面的自身稳定。

熊海虹研究生英语综合教程上下册原文+翻译(完整版)

熊海虹研究生英语综合教程上下册原文+翻译(完整版)

Unit1TRAITS OF THE KEY PLAYERSDavid G. Jensen核心员工的特征大卫·G.詹森1 What exactly is a key player? A "Key Player" is a phrase that I've heard about from employers during just about every search I've conducted. I asked a client - a hiring manager involved in a recent search - to define it for me. "Every company has a handful of staff in a given area of expertise that you can count on to get the job done. On my team of seven process engineer and biologists, I've got two or three whom I just couldn't live without," he said. "Key players are essential to my organization. And when we hire your company to recruit for us, we expect thatyou'll be going into other companies and finding just that: the staff that another manager will not want to see leave. We recruit only key players."1核心员工究竟是什么样子的?几乎每次进行调查时,我都会从雇主们那里听到―核心员工‖这个名词。

武汉大学研究生英语教材全文翻译ofunit23457

武汉大学研究生英语教材全文翻译ofunit23457

Final Version of TranslationUnit two1.为什么我们与来自其它文化的人们的交流总是充满了误会、让人感到沮丧呢?令很多人奇怪的是,即使怀着良好的愿望、使用自己认为是友好的方式,甚至有互利的可能性,也似乎都不足以保证交流的成功。

有时候,出现排斥现象正是因为一方所属的文化群体团体是“不同”的。

在这个国际舞台发生重大变化的时刻,探讨为什么尝试交流的结果却令人失望的原因是必要的,这些原因实际上是跨文化交流中的绊脚石。

2.相似性的假设为什么误解或反对会产生呢?这个问题的一个回答就是,大部分的人天真地认为世界上的人有足够的相似之处,可以让我们成功地交流信息或感受,解决共同关注的一些问题,加强商业关系,或者只是产生我们所希望产生的印象。

所有的人都会生儿育女,组成家庭或社会,发展一种语言以及适应他们周围环境的这种倾向特别具有欺骗性,因为它带来了一种期望,这种期望就是这些行为的形式以及围绕这些行动的态度与价值观念将是相似的。

相信“人就是人”和“我们内在本质是相似的,”这让人感到心安理得,但是下定决心去寻找证据却只会令人失望。

3.力求证明达尔文关于面部表情是共同的这一理论的跨文化研究给人极大的希望,研究者发现脸部的某些看得见的形状,即因愤怒、恐惧、惊讶、悲伤、厌恶、幸福而紧缩的肌肉组合,我们人类各成员都是一样的。

但是这似乎无济于事,只要我们意识到一个人生长的文化决定了这种情感是否会表露或压抑,决定了在何种场合和多大的程度上会表露或压抑。

带来这种情绪感受的情形也因文化而异,例如:由于崇拜的文化信仰不同,一个心爱的人死亡可能带来欢乐、悲哀或其他情感。

4.因为似乎没有普遍的人性可以作为自动理解的基础,所以我们必须把每交往当作个别案例来处理,寻求任何共同的认知和交流方法并以此作为出发点。

如果我们认识到我们受文化的约束,受文化的改变,那么我们就会受这一现实:因为各自不同,我们确实不太清楚其他人“是”什么样的。

(完整word版)研究生英语精读教程课文原文+翻译+短文unit2

(完整word版)研究生英语精读教程课文原文+翻译+短文unit2

Cancer &Chemicals—Are We Going Too Far?Marla ConeLast year, California governor George Deukmejian called together many of the state's best scientific minds to begin implementing Proposition 65,the state’s Safe Drinking Water and Toxic Enforcement Act。

This new law bans industries from discharging chemical suspected of causing cancer (carcinogens) or birth defects into water supplies。

Some claim it will also require warning labels on everything that might cause cancer。

去年,加利福尼亚州州长乔治·德米加召集本州许多优秀的科学家开会,开始执行第65号提案,即州安全饮用水和毒品实施法案。

这一新法令禁止各工业部门向水源中排放被怀疑致癌和引起先天缺陷的化学物质.有些人宣称,新法律还要求在一切可能致癌的物品上贴上警告标签。

A day of esotericscience and incomprehensible jargonwas predicted. But Bruce Ames, chairman of the department of biochemistry at the University of California at Berkeley,had plans to liven the proceedings.原来预计,开会那天将全是些玄妙的科学和难懂的术语,但加州大学伯克利分校生物化学系系主任布鲁斯·爱姆兹却打算使会议开得更有生气。

专业学位研究生英语通用教程_第二版,课文翻译

专业学位研究生英语通用教程_第二版,课文翻译

In the United States most people are simultaneously consumers and producers; they are also voters who help inf luence the decisions of the government. The mixture among consumers, producers, and government changes constantly, making a dynamic rather than a static economy. In the last decade consumers have made their concern known and government has responded by creating agenci es to protect consumer interests and promote the general public welfare. In another development, the population and the labor f orce have moved dramatically f rom farms to cities, f rom the f ields to the f actori es, and above all to service industries, thus providing more personal and public servi ces. In today’s economy these providers of services f ar outnumber producers of agricultural and manuf actured goods.﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏Every year 80000 Chinese die f rom antibiotics abuse, making China one of the worst offenders in the world. Statistics show that among the country’s 15 best-selling medicines, 10 are antibiotics. More than 50 per cent of the medical expenses f or Chinese in-patients goes to cover di ff erent kinds of antibiotics, while the f igure in Western countries is just 15 to 30per cent.The side eff ects of antibiotics use can damage organs, cause disorders in the body’s normal bacteria and increase the resistance of disease causing germs. Many Chinese believe the myth that antibiotics can diminish inf lammation, so they use them to treat everything f rom toothache to f ever. A story from the Xinhua News Agency said that more than 80 per cent of Chinese families have antibiotics stored on shelves at home in case of different kinds of infections.Children have becom e the biggest victims of antibiotic abuse where the drug kills normal bacteria leading to damage of children’s still growing organs. Statistics in Guangzhou showed the some 17 per cent of local residents now suffer from antibiotic-resisitant diseases while the f igure was 50 per cent for children, according to data f rom the local children’s hospital. The marked increase of asthma in children recently has a lot to do with antibiotics abuse.﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏Television news reports and programs bring about both positive and negative inf luence. From the news reports, people will happen in the world, such as wars in the Middle East and famine in Af rica. As a result they broaden their mind. By watching television programs people also get to know other peoples and their cultures. However, television news reports and programs may mislead people. V iolence and drug problems are harm f ul to young people. Political scandals, illegal campaign contributions an illegal f inancial manipulation greatly damage the nation’s image. Things t o worse especially when international audiences lack context f ram e of reference.﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏The last century saw a steady gradual increase in literacy, and thus in the number of readers. As readers increased, so the number of potential listeners declined, and thus there was some reduction in the need of read aloud. As reading f or the benef it of listeners grew less common, so came the f lourishing of reading as a private activity in such public places as libraries, railway carriages and off i ces, where reading aloud would cause distraction to other readers.Towards the end of the century there was still considerable argument over whether books should be used f or inf ormation or treated respect f ully, and over whether the reading of materi al such as newspapers was n some way mentally weakening. Indeed this argument remains with us still in education. However, whatever its virtues, the old shared literacy culture had gone and was replaced by the printed mass media on the one hand by books and periodicals f or specialized readership on the other.﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏﹏什么叫抠门?你是否会在快用完的洗发水瓶里加点水可以再多洗一次?或者在垃圾筐里陈一个塑料袋?是否会把大孩子穿过的一条牛仔裤或一条裙子给小孩子穿?或者用前一天的剩菜再做一顿新的吃?这些事情是否表明你是一个守财奴或吝啬鬼呢?尽管“抠门主义者”会说一分钱扮成两半用并不意味着抠门的生活方式,但是如果我们有意节省,我们会更能掌控手中的钱财。

研究生英语系列教材上unit4 原文翻译

研究生英语系列教材上unit4 原文翻译

The following text is extracted from Marriages and Families by Nijole V.Benokraitis.下面的文章选自奈杰尔贝诺克瑞提斯的婚姻与家庭。

The book has been used as a textbook for sociology courses and women's studies in a number of universities in the United States.此书在美国的一些大学里被用作社会学和妇女研究等课程的教材,It highlights important contemporary changes in society and the family它强调了在当代社会和家庭中所发生的重要变化,and explores the choices that are available to family members,探索了家庭成员所面临的选择,as well as the constraints that many of us do not recognize.以及我们很多人都还未意识到的种种约束。

It examines the diversity of American families today,该书还审视了当今美国家庭的多样性,using cross-cultural and multicultural comparisons运用跨文化和多元文化的比较,to encourage creative thinking about the many critical issues that confront the family of the twenty-first century.以激发创造性思维来研究21世纪家庭所面临的许多严峻问题。

LOVE AND LOVING RELATIONSHIPS爱和情感连系Nijole V.Benokraitis奈杰尔·贝诺克瑞提斯Love — as both an emotion and a behavior — is essential for human survival.爱,对于人类的生存是不可或缺的。

研究生英语教材翻译Beauty_and_the_Beast

研究生英语教材翻译Beauty_and_the_Beast

Beauty and the BeastPhil DonahueCompared to the animals around us, there’s no doubt we are a remarkable phenomenon. Someone referred to us the “superdeluxe model”: we walk, we talk, we smile, we taste, we touch, we think. All this is in a relatively small and attractive package. We’re also very good with our hands. In the comparatively brief time we’ve been available in the current form - about 50,000 years –we’ve invented the wheel, the alphabet, the clock, the reciprocating machine, the cyclotron, and everything in between. When we weren’t busy making progress, we invented more playful things like music, art, baseball, and bridge. Over the years, we’ve demonstrated an admirable willingness to cooperate with each other. We assemble in big groups to form towns and cities; we get together in twos to discover love. We’ve also shown a lot of individual spunk. The wheel wasn’t invented by a committee, and Albert Einstein, by himself, revolutionized our understanding of the universe. 和身边的动物相比,毫无疑问我们是不寻常的现象。

智能自动移动机器人系统研究中英文外文文献翻译

智能自动移动机器人系统研究中英文外文文献翻译

本科毕业设计(论文)中英文对照翻译(此文档为word格式,下载后您可任意修改编辑!)原文The investigation of an autonomous intelligent mobile robot systemfor indoor environment navigationS KarelinAbstractThe autonomous mobile robotics system designed and implemented for indoor environment navigation is a nonholonomic differential drive system with two driving wheels mounted on the same axis driven by two PID controlled motors and two caster wheels mounted in the front andback respectively. It is furnished with multiple kinds of sensors such as IR detectors ,ultrasonic sensors ,laser line generators and cameras,constituting a perceiving system for exploring its surroundings. Its computation source is a simultaneously running system composed of multiprocessor with multitask and multiprocessing programming. Hybrid control architecture is employed on the rmbile robot to perform complex tasks. The mobile robot system is implemented at the Center for Intelligent Design , Automation and Manufacturfing of City University of Hong Kong.Key words:mobile robot ; intelligent control ; sensors ; navigation IntroductionWith increasing interest in application of autonomous mobile robots in the factory and in service environments,many investigations have been done in areas such as design,sensing,control and navigation,etc. Autonomousreaction to the real wand,exploring the environment,follownng the planned path wnthout collisions and carrying out desired tasks are the main requirements of intelligent mobile robots. As humans,we can conduct these actions easily. For robots however,it is tremendously difficult. An autonomous mobile robot should make use of various sensors to sense the environment and interpret and organize the sensed information to plan a safe motion path using some appropriate algorithms while executing its tasks. Many different kinds of senors havebeen utilized on mobile robots,such as range sensors,light sensors,force sensors,sound sensors,shaft encoders,gyro scope s,for obstacle awidance,localizatio n,rmtion sensing,navigation and internal rmnitoring respectively. Many people use infrared and ultrasonic range sensors to detect obstacles in its reaching ser range finders are also employed in obstacle awidance behavior of mobile robots in cluttered space.Cameras are often introduced into the vision system for mobile robot navigation. Although many kinds of sensors are available,sensing doesn’t mean perceiving. The mechanical shape and driving type are commonly first taken into consideration while implementing a rmbile robot. A robot’s shape can have a strong impact on how robust it is,and DC serve rmtors or stepOper motors are often the two choices to employ as actuators. The shape of a robot may affect its configurations of components,ae sthetics,and even the movement behaviors of the robot. An improper shape can make robot run a greater risk of being trapped in a cluttered room or of failing to find its way through a narrow space. We choose an octahedral shape that has both advantages of rectangular and circular shapes,and overcomes their drawbacks. The framework of the octahedral shaped robot is easy to make,components inside are easily arrange and can pass through narrow places and rotate wrath corners and nearby objects,and is more aesthetic in appearance. The perception subsystem accomplishes the task of getting various data from thesurroundings,including distance of the robot from obstacles,landmarks,etc.Infrared and ultrasonic range sen}rs,laser rangefinders and cameras are utilized and mounted on the rmbile robot to achieve perception of the environment. These sensors are controlled independently by some synchronously running microprocessors that are arranged wrath distributive manner,and activated by the main processor on which a supervising program runs. At present,infrared and ultranic sensors,laser rangefinders are programmed to detect obstacles and measure distance of the robot from objects in the environment,and cameras are programmed for the purpose of localization and navigation.The decision-making subsystem is the most important part of an intelligent mobile robot that organizes and utilizes the information obtained from the perception subsystem. It obtains reasonable results by some intelligent control algorithm and guides the rmbile robot. On our mobile robotic system intelligence is realized based on behaviourism and classical planning principles. The decision-making system is composed of twa levels global task planning based on knowledge base and map of working enviro nment,reactive control to deal with the dynamic real world. Reaction tasks in the decision-making system are decomposed into classes of behaviors that the robot exhibits to accomplish the task. Fuzzy logic is used to implement some basic behaviors. A state machine mechanism is applied to coordinate different behaviors. Because manykinds of electronic components such as range sensors,cameras,frame grabbers,laser line generators,microprocessors,DC motors,encoders,are employed on the mobile robot,a power source must supply various voltage levels which should are stable and have sufficient power. As the most common solution to power source of mobile robots,two sealed lead acid batteries in series writh 24 V output are employed in our mobile robot for the rmtor drive components and electronic components which require 24 V,15V,士12V,+9V,士5V,variously. For the conversion and regulation of the voltage,swritching DC DC converters are used because of their high efficiency,low output ripple and noise,and wride input voltage range. Three main processors are Motorola MC68040 based single board computers on which some supervisory programs and decision-making programs run. These MC68040 boards run in parallel and share memory using a VMEbus. Three motorola MC68HC11 based controllers act as the lower level controllers of the infrared and ultranic range senors,which communicate with the main processors through serial ports. The multi-processor system is organized into a hierarchical and distributive structure to implement fast gathering of information and rapid reaction. Harmony,a multiprocessing and multitasking operating system for real-time control,runs on the main processors to implement multiprocessing and multitasking programming. Harmony is a runtime only environment and program executions are performed by downloadingcrosscompiled executable images into target processors. The hardware architecture of the mobile robot is shown in Fig. Robots control For robots,the three rmst comrmn drive systems are wheels,tracks and legs. Wheeled robots are mechanically simpler and easier to construct than legged and tracked systems that generally require more complex and heavier hardware,so our mobile robot is designed as a wheeled robot. For a wheeled robot,appropriate arrangements of driving and steering wheels should be chosen from differential,synchro,tricycle,and automotive type drive mechanisms. Differential drives use twa caster wheels and two driven wheels on a common axis driven independently,which enable the robot to move straight,in an arc and turn in place. All wheels are rotate simultaneously in the synchro drive;tricycle drive includes two driven wheels and one steering wheel;automobile type drive rotates the front twa wheels together like a car. It is obvious that differential drive is the simplest locomotion system for both programming and construction.However,a difficult problem for differentially driven robots is how to make the robot go straight,especially when the motors of the two wheels encounter different loads. To follow a desired path,the rmtor velocity must be controlled dynamically. In our mobile robot system a semv motor controller is used which implements PID control.Ibwer amplifiers that drive the motors amplify the signals from each channel of serwcontroller. Feedback is provided by shaft encoders on the wheels.The block diagram of the motor control electronic components are shown in Fig. 2,and the strategy of two wheel speed control based PID principle is illustrated in Fig.3. Top loop is for tracking the desired left motor velocity;bottom loop for tracking right motor velocity;Integral loop ensures the robot to go straight as desired and controls the steering of the robot. This is a simple PI control that can satisfy the general requirements.Sensing subsystemSensor based planning makes use of sensor information reflecting the current state of the environment,in contrast to classical planning,which assumes full knowledge of the environment prior to planning. The perceptive subsystem integrates the visual and proximity senors for the reaction of the robot. It plays an important role in the robot behavioral decision-making processes and motion control. Field of view of perceptive subsystem is the first consideration in the design of the sensing system. Fneld of view should be wide enough with sufficient depth of field to understand well the robot’s surroundings. Multiple sensors can provide information that is difficult to extract from single sensor systems. Multiple sensors are complementary to each other,providing a better understanding of the work environment. Omnidirectional sensory capability is endowed on our mobile robot. When attempting to utilize multiple senors,it must be decided how many different kinds of sensorsare to be used in order to achieve the desired motion task,both accurately and economically.Ultrasonic range sensing is an attractive sensing rmdalityfor mobile robots because it is relatively simple to implement and process,has low cost and energy consumption. In addition,high frequencies can be used to minimize interference from the surrounding environment. A special purpose built infrared ranging system operates similar to sonar,determining the obstacle’s presence or absence and also the distance to an object. For detecting smaller obstacles a laser rangefinder can be used. It can be titled down to the ground to detect the small objects near the robot. Identifying robot self position and orientation is a basic behavior that can be part of high level complex behaviors. For localizing a dead reckoning method is adopted using the output of shaft encoders. This method can have accumulated error on the position and orientation. Many external sensors can be used for identification of position and orientation. Cameras are the most popular sensor for this purpose,because of naturally occurring features of a mom as landmarks,such as air conditioning system,fluorescent lamps,and suspended ceiling frames.Any type of sensor has inherent disadvantages that need to be taken into consideration. For infrared range senors,if there is a sharply defined boundary on the target betweendifferent materials,colors,etc.,the sensor may not be able to calculate distance accurately. Some of these problemscan be avoided if due care is taken when installing and setting up the sensor. Crosstalk and specular reflection are the two main problems for ultrasonic sensors. The firing rates,blanking intervals,firing order,and timeouts of the ultrasonic sensor system can configured to improve performance. Laser ranging systems can fail to detect objects made of transparent materials or with poor light reflectivity. In this work,we have chosen range sensors and imaging sensors as the primary source of information. The range sensors employed include ultrasonic sensors and short and long range infrared sensors with features above mentioned. The imaging sensors comprise gray scale video cameras and laser rangefinders. Twenty-four ultrasonic sensors are arranged in a ring with a separation angle of 15 degrees on our mobile robot to detect the objects in a 3600 field of view. This will allow the robot to navigatearound an unstructured environment and to construct ac curate sonar maps by using environmental objects as naturally occurring beacons. With the sonar system we can detect objects from a minimum range of 15 cm to a maximum range of 10. 0 m. Infrared range sensors use triangulation,emitting an infrared spot from an emitter,and measuring the position of the imaged spot with a PSD (position sensitive detector).Since these devices use triangulation,object color,orientation,and ambient light have greater effect on sensitivity rather than accuracy. Since the transmission signal is light instead of sound,we may expect a dramatically shortercycle time for obtaining all infrared sensor measurements. A getup of 16 short and a group of 16 long infrared sensors are mounted in twa rings with equal angular Generally speaking,the robot motion closed control loops comprising sensing,planning,and acting should take very short cycle times,so a parallel computation mechanism is employed in our mobile robot based on multiprocessor. Usually we can make events run in parallel on single microprocessor or multiprocessor by twa methods,multitasking and multiprocessing. Well known multitasking OS is like Microsoft window' 95 and UNIX OS that can make multitask run in parallel on a sequential machine by giving a fraction of time to each behavior looply. In fact,multitask mechanism just simulates the effect of all events running simultaneously. Running all events on multiprocessor can realize true parallelism. In our mobile robot,using Harmony OS both multitasking and multiprocessing programming is implemented on multiprocessor (MC68040 processors) which share memories and communicate each other by VMEbus. Harmony allows creating many tasks as desired which can be map toseveral microprocesors and run in parallel .In addition,tasks written in C run on MC68040 can activate the assembly code in the MC68HC11 SBC which control infrared and ultrasonic sensors and get distances dates. These SBC run simultaneously with MC68040 processors. An instance of an implemented task structure is shown in Fng. 5.Some experiments,such as following lines,avoiding obstacles and area filling have been carried out on the rmbile system to demonstrates its real-time reactions to the working surroundings and robustness of the system. ConclusionWe have described the implementation of a intelligent mobile robot testbed for autonomous navigation in indoor environments and for investigation of relative theories and technologies of intelligent systems. The robot is furnished with range sensors,laser line generators and vision system to perceive its surroundings. Parallel computation based on multiprocessor is employed in the mobile robot to improve its power of reasoning and response. Low level processing and sensor control is carried out with low cost dedicated microcontrollers. A task based real-time operating system supports a variety of different control structures,allowing us to experiment with different approaches. The experiments indicate the effectiveness of the mobile robot system .The platform has been used for experimenu and research such as sensor data fusion,area filling,feedback control,as well as artificial intelligence.译文基于室内环境导航的智能自动移动机器人系统研究卡若琳摘要这种为室内境导航条件下设计生产的自主移动机器人系统是一个不完整的差速传动系统,它有两个安装在同一轴上通过两个PID控制的电机驱动的驱动轮和两个分别安装在前部和后部的脚轮。

外文文献原稿及译文

外文文献原稿及译文

外文文献原稿和译文原稿About Programmable Logiccontrollers(PLCs)PLCs (programmable controller) is used in a variety of automatic control system and process control hub.They contain multiple input and output, input and output is used to transistors and other circuit, analog switch and relay to control the equipment.PLC software interface, standard calculator interface, specialized language programming and network equipment.Programmable logic controller I/O channel rules including all input output contact and contact, to expand capacity and the largest number of channels.Contact number is the sum of input and output points.PLC can specify any combination of these values.Extension units can be stack or connected to each other to increase the total control.The largest number of channels are in an extension system, the total number of maximum input and output channels.PLC system rules include scanning time, number of instructions, data storage and storage program.Scan time is used to monitor input and output module of PLC need time.Standard operation instruction is used in PLC software.Data storage is the ability to store data.Program memory is the ability to control software.Used for programmable controller input devices including DC, AC, intermediate relay, thermocouple, RTD, frequency or pulse, transistors and interrupt signal input;Output devices include DC, AC, intermediate relay, frequency or pulse, transistor, three-terminal two-way thyristor switch components;PLC programming equipment including control panel, handle and computer.Programmable control is used to control a variety of software programming language.These languages including iec61131-3, sequential table (SFC), action block diagram (FBD), ladder diagram (LD), and the structure of the text (ST), instruction sequences (IL), relay ladder diagram (RIL), flow charts, C language and Basic language.Iec61131-3 programming environment can support five languages, with international standards to regulate, SFC, respectively, FBD, LD, ST and IL.This allows more vendor compatibility and a variety of languages.SFC is a kind of graphlanguage, it provides the programming in order to cooperate, can support the order selection and tied for choice, to choose between them.Runtime FBD with a big, established the complicated process, in the form of graphs.Standard mathematical and logical operation can be combined with user interaction and interface operation.LD is suitable for discrete control and interlock logic diagram language.It is fully compatible with FBD on discrete control.ST is a kind of text language, used for complex mathematical and computational process, language is not applicable to chart.IL is similar to the combination of coding low-level languages.It is used in relatively simple logical instructions.Relay ladder diagram and ladder diagram is used for programmable controller is an important programming dder diagram programming is designed to relay logic diagram representation of the program.Flow chart is a graphic language, for use in a controller or operations described in the order of application software, it is used to establish a standard component of recycled runtime.C language is a high-level programming language, suitable for processing the most complicated calculation, a continuous data acquisition task.It typically run in PC debugging.BASIC language is used to handle the number of consecutive data acquisition and interface operation of high-level language.Programmable controller also specification of many computer interface equipment, network rules and characteristics.PLC energy equipment and running environment is also very important.The development history of programmable controllerIn 1968, general motors (GM), according to the needs of the development of the market situation and put forward the "many varieties, small batch, new car brand model" strategy.To implement this strategy, relying on the original industrial control device obviously not, and there must be a kind of new industrial control device, it can be with the change of the products, flexible and easily change control scheme to difficult to meet the different requirements of control.In 1969, the famous American digital equipment corporation (DEC) according to the function requirements of GM, developed the new industrial control device, and the GM of a vehicle to run automated production line for the first time to succeed.According to this new type of industrial control devices can be programmedto change control scheme this characteristic, and the situation of the specialized for Logic control, says the new industrial control device for the Programmable control (Programmable Logic Controller), hereinafter referred to as PLC.From 1968 to now, the PLC has experienced four generation: most of the first generation of PLC with a machine development, with the core memory storage, only the logic control function.In the second generation of PLC products for 8-bit microprocessor and semiconductor memory, PLC product seriation.The third generation of PLC product with high performance microprocessor and chip is used in great quantities in the PLC CPU, PLC speed greatly improved, thus enabling it to develop in the direction of multi-function communications and networking.The fourth generation of PLC products not only comprehensive use 16-bit and 32-bithigh-performance microprocessors, high-performance slice microcontroller processor, RISC (Reduced instruction set computer) Reduced instruction system CPU and other advanced CPU, and more than one processor in a PLC configuration, multi-channel processing.Also produced a large number of embedded microprocessor module, only makes the fourth generation of PLC product has the function of logical control, process control, motion control, data control, networked control functions really worthy of the name of multi-functional controller.At the same time, the PLC network composed of PLC has also been rapid development.PLC and industrial control of PLC network in factory enterprises become the preferred device, composed of PLCmulti-stage distributed PLC network become indispensable fundamental part of CIMS system.People spoke highly of the importance of PLC and its network, it is one of the three pillars of modern.Selecting machine modelMarket popular PLC products manufacturer in China with the following companies:(1) schneider company, including the introduction of early from Modicon company by the tianjin instrument instrument and meter plant products, products are now Quantum, Premium and Momentum;(2) rockwell company (including AB company) PLC products, products are now SLC and Micro Logix Control Logix etc.(3) of Siemens PLC products, products are now 400/300 / S7-200 series;(4) ge PLC products;(5) the company's products such as omron, mitsubishi, Fuji, panasonic, one of the most popular is the mitsubishi FX series.The basic principle of PLC selection is: in the input/output quantity meet the requirements under the premise of should choose the most reliable, maintenance, and use the most convenient and cost-effective optimal products.Selecting I/OPLC is an industrial control system, the control object is industrial production equipment or the production process of industrial products, working environment is the industrial production field.It connects the industrial production process is achieved by I/O interface module.PLC has a lot of I/O interface module including switch input module, the switch output module, analog input module and analog output module and special module, we should use according to the characteristics of their implementation options.(1) determine the number of input/outputAccording to the requirements of the control system, determine the number of input/output required, should increase the spare quantity of 10% 20%, in order to increase control function in any time.(2) the switch quantity input/outputSwitch input/output interface and can take the signals from the sensors and switches and control equipment.A typical 24-240 - v ac input/output signals, 5-240 - v dc input/output signals.(3) the analog input/outputAnalog input/output inte rface can accept the signal generated by thesensor.These interfaces can be used to measure turnover rate, temperature and pressure, and thus to control the voltage or current output device.Range for these interfaces - 10-10 v, + 0 to 10 v, 4-20 ma, or 10 to 50 ma.Some manufacturers on the PLC design special dedicated analog interface, so it can receive low level signal.In general, this interface module can be used to receive different types of thermocouple and RTD mixed signal.(4) special function input/outputWhen selecting a PLC, user may faced some special types of input/output and some because of the location of the limited input/output and fast response and frequency problem caused by the non standard input/output.Now, the user should consider whether to accept by the market or manufacturers to provide a special module, through a dedicated part of the module and dispose data, so as to reduce the use of the CPU, improve the efficiency of the task processing, to minimize failure caused by high limit control.PLC statusIn a PLC, the lack of keyboard and other input and output devices is a very worthy of attention.In PLC front usually have a certain amount of status ually indicates that:The start-up - as long as the PLC charged, it will be started.Program is running - this will indicate whether running or if no program is running. Error display - when PLC has a large hardware or software errors, it will be displayed. These lights are usually used for debugging.A certain number of button will also be provided to the PLC hardware.The most common button is a run/programming selection switch, when in keeping the state, it will be transferred to the programming;When the production status, it will be transferred to the operation.A PLC system almost no start closing switch or reset switch at the front.It needs to be designed into the system the rest.The state of the PLC can also be ladder logic diagram.Test whether the program implemented is very common for the first time.'first scan input in ladder diagram by scanning for the first time, will is right, and in the rest of the time when the scanning is wrong.In this case, the PLC - 5 'first scan' address is' S2:1/14 '.According to the example of the logical relationship, the first scan will seal the 'light' until the 'clear' is started.So the light will be start brighter in the PLC, but after the "clear" is launched, it will shut down and remain in the closed position.'first scan module is mentioned in the "first pass" module.PLC application domainAt home and abroad at present, the PLC has been widely used in steel, petroleum, chemical, electric power, building materials, machinery manufacturing, automobile, textile, transportation, environmental protection and cultural industries with happiness and usage can be roughly divided into the following categories:(1) the switch quantity logic controlThis is the most basic, the most widely PLC applications, it replaces the traditional relay circuit, realize logic control, sequence control, can be used for control of single equipment, also can be used in many machines and automatic assembly line.Such as injection molding machine, printing machine, stapler machinery, combined machine tool, grinding machine, packaging production line, plating production line, etc.(2) analog controlIn the process of industrial production, there are a lot of continuous change, such as temperature, pressure, flow, liquid level and speed and so on are all analog.In order to make the programmable controller to deal with analog, must implement the analog quantity and digital quantity between A/D and D/A conversion module, the programmable controller for analog control.(3) motion controlPLC can be used in circular motion and linear motion control.From control mechanism configuration, early applied directly to switch the I/O module connection position sensors and actuators, now in general use special motion controlmodule.Such as driving a stepper motor or servo motor of uniaxial or multi-axis position control module.The world's major products almost all have motion control function of PLC manufacturers, widely used in all kinds of machinery, machine tools, robots, elevators, etc.(4) process controlProcess control is to point to the analog quantities such as temperature, pressure, flow rate of the closed loop control.As industrial control computer, PLC can prepare the all kinds of control algorithm procedures, complete the closed-loop control.PID control is generally be applied closed loop control system of the control rge and medium-sized PLC has PID module, at present many small PLC also has thefunction module.PID processing is generally run special PID subroutine.The process control in metallurgy, chemical industry, heat treatment, boiler control occasions has wide application, etc.(5) the data processingModern PLC with mathematical operation, data transmission, data conversion, sorting, look-up table, a function, such as the operation can complete data collection, analysis, and processing.These data can be compared with the reference value of memory, accomplish a certain number of control operation, also can send to other intelligent device, the use of communication function or printing them tabulation.Data processing is generally used in a large control system, such as unmanned control of flexible manufacturing systems;Can also be used to process control system, such as paper making, metallurgy, food industry, some of the large control system.(6) communications and networkingPLC communication with the communication between PLC and the communication between PLC and other smart devices.With the development of computer control, factory automation network is growing fast, the PLC manufacturers have attached great importance to PLC communications functions, have launched their own network systems.The newly production PLC has a communication interface, communication is very convenient.PLC application field is still in the extension, in Japan, the application of PLC has been from the traditional industrial automatic control equipment and machinery, extended to the following areas of application: small and medium-sized process control system, remote maintenance service system, the energy conservation monitoring control system, and of the relation of living machines, relationship with the environment, and all have rapidly rising trend.It is important to note that with PLC, DSC mutual penetration, both the boundaries of an increasingly fuzzy, PLC applied to discrete manufacturing industry from the traditional to the applied to the continuous process industries to expand.译文PLC介绍PLC(可编程控制器)是用于各种自动控制系统和过程的可控网络集线器。

《21世纪研究生英语教材》课本翻译

《21世纪研究生英语教材》课本翻译

1. 购物新大陆1 在冰岛你如何说“维多利亚秘密”?随着美元在全球范围内与其他货币兑换率不断创低,美国正成为世界的折扣店。

2 今年假日旺季,带给零售商一个意外收获:行李箱。

3 趁美元贬值之机飘洋过海而来的血拼客,不得不买一个更大的行李箱来装战利品。

纽约时代华纳购物中心的Tumi店称主要得益于附近酒店的海外游客,销售收入较去年同期上涨三成。

在FAO Schwarz店,顾客甚至在柜台旁买大帆布包用来购物。

4 几年来,美国一直为涓涓细流般的购物观光客而苦恼。

现在,伴随着美元的新低----假日旺季的全面促销----涓涓细流变成了购物狂潮。

5 客如潮涌,一些零售商因此为外国游客铺上了红地毯。

加州Costa Mesa的南岸广场在中央的店铺指引中印上中文,为中国游客提供便利。

本月早些时候,在底特律拥有四家购物中心的Taubman Centers开通了穿越国境的“六小时疯狂购物”之旅,满载美酒和店家折扣券的豪华轿车运送着购物者来往于加拿大。

6 海外购物客在大肆采购的同时,也秀出有别于美国消费者的独特消费习性。

例如,第五大街Saks店表示,欧洲客钟情于UGG的靴子(大约2004年流行于美国)。

而更多的亚洲客人喜欢诸如LV、Gucci等奢华商品,但同时也会关顾按摩和维生素保健品。

7 Josefina和Carolina搭乘冰岛航空从斯德哥尔摩飞到纽约,开始购物之旅。

这对介乎21-25岁间的年轻情侣流连于“维多利亚秘店”前。

“我们来这里买化妆品和香水,”Carolina说道,而她拖着的硕大行李箱里,已经塞进了八双鞋子(她已经把包装盒都扔了)。

维多利亚内衣商尽管在瑞典没有开出门店,但仍每年飞往瑞典做秀。

Carolina又说:“这里的香波也很便宜。

”8 11月美元兑欧元创出新低,1欧元兑换1.48美元以上。

对于英国人来说,1英镑现在差不多可以换到2美元。

加上机票的廉价,欧洲游客说,他们在买衣服和礼物上省下的钱足以弥补旅游开销了。

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Discussion about the application of the anchor bar on theslope constructionFu Ming Fu , Zhang TianAbstract:There are some advantages in strengthening slope with the anchor bar, such as low project cost, convenient for construction and so on. It not only meets the requirement of the reliability of the construction, but also is economic and reasonable for the construction.Key words: anchor bar; slope; strengthening1.IntroductionAnchor technique uses strata geotechnical’s shear strength around bolt to deliver structures pulling force or keep strata of the excavation own stability. Due to the use of the anchor rod, Anchor strata produce compressive zone and have reinforcement effect to strata, can enhance the strength of strata, improve mechanical properties of strata, make structure and stratum together formed a kind of work together complex. Anchor system can effectively sustain tension and shear, improve shear strength of the potential sliding surface, so it can effectively prevent slope to produce sliding damage.Fig 1 after excavation of the slope2.Project profileThe length of a slope is about 60m, the most slope height is about 23m,the angle up to 50°~ 75°, a five-layer frame structure buildings is far from about 1.5 to 4m at its base edge, its foundation is artificial bored pile and its bearing stratum is in weathered phyllite. Due to the strong weathering of rocks, it was chunky, loosely structured, multi-muddy filling. It has residual slope deposits of silty clay overlying and local folder with a pulpy, low strength. Slope hadcollapsed at various locations, it is vary dangerous to the building, so we need to reinforce the slope, and we use stone concrete retaining wall and bolt to support it.3.Bolt retaining and protecting design3.1Bolt design(1)all formation of anchor use whole length bond-type, the binder materials are ordinary cement mortar, the mortar strength grade is M30, the anchor length L is 10 meters, the slope height h is 9 meters. Anchoring section length is 5m.(2)According to the construction condition and the needs of the process, the layout form of anchor use quincunx, and in order to make the anchoring force in the role of surface rock surface with uniform, the two adjacent line bolts should be staggered arrangement.(3)The anchor’s number according to /3.24 per meter to calculation, the anchor length is L, a tolal of 252. The diameter of drilling holes is φ90,the number of drill according to (L-0.1)m per hole to calculation, M30 grout number according to average 0.052m3per hole to calculation.(4)The two adjacent rows vertical spacing of anchor take 2.55m, horizontal spacing take 2.55m. The dip angle of anchor: with the angle of horizontal line is 20°, and drilling down with this Angle.(5)Anchor use the steel bar, which is HRB400 level, 28mm diameter.3.2Anchor calculation(1)The calculation of lateral geotechnical pressure[1][2]When the supporting structure to leave in rock and earth mass direction migration until to the limit equilibrium state, the geotechnical pressure which is role in supporting structure called active geotechnical pressure. Its calculation method is as follows:For the slope which has no flare structure surface, generally speaking, failure is controled by rock mass strength, the calculation formula is same to the active soil pressure, but cohesive force C take zero, internal friction angle ϕuse eϕ(rock mass equivalent internal friction angle) instead of, according to the standard to selection; rupture angle is 45°+ϕ/2(ϕis rock mass internal friction angle, is estimationed by haircut at the standard of rock mass internal friction angle, reduction factor according to the standard to selection).According to the engineering survey, active rock pressure can calculation as follows:(2)the calculation of anchor tension design value a Q ak N N γ= (1)(2) In the formula: a N is anchor tension design value; ak N is anchor tension standard value; Q γis partial load factor, take 1.3; tk H is the horizontal tension standard value of anchor; αis the dip angle of anchor.Through the calculation, ak N =112.3kN a N =145.99kN(3)the calculation of anchor steel section area(3) In the formula: S A is the steel section area of anchor; ογ is slope engineering importance coefficient(the slope engineering importance coefficient of this project is level 1, take 1.1); 2ξis the tensile working conditions coefficient of anchor bar ( permanent anchor take 0.69, temporary anchor take 0.92); y f is the tensile strength design value of anchor bar(standard value k y f =400a MP , design value y f =360a MP ).According to the calculation, S A ≥0.5883210m -⨯,choose level 3 steel of 1φ28mm,S A =0.6153210m -⨯.(4)The calculation of anchorage body and rock mass anchoring lengthanchoring length should not only meet the requirements which the bond force of formation on mortar and the bond stress of mortar on steel, but also meet the requirements that the Structure design codes the Minimum anchoring length.(4) In the formula: a l is the anchoring length; D is the diameter of anchorage body; rb f is the bond strength eigenvalue of layer and anchorage body, through the experiment or local experience sure, or according to the standard to selection ( this engineering ’s rock mass uniaxial compressive 2222111209tan (45)2090.217175.77/2222e a aE H K kN m ϕγ︒==⨯⨯⨯-=⨯⨯⨯=cos tkak H N α=2a S yNA f ογξ≥1ak a rbN l Df ξπ≥strength is 7.46a MP , belong to soft rock, rock mass structural plane development, rb f take 300a KP );1ξis the bond working conditions coefficient of anchorage body and layer (permanent anchor take 1.00).According to the calculation, a l ≥4.3m, take a l =5.0m.(5)The anchoring length between anchor steel and anchor mortara l ≥ (5) In the formula: a l is the anchoring length between steel and mortar; d is the diameter of anchor bar; n is the number of steel;b f is the bond strength design value between steel and anchor mortar, through the experiment sure, or according to the standard take 2.40; 3ξ is the working conditions coefficient of steel and mortar bond strength(permanent anchor take 0.60). According to the calculation, a l ≥2.1m ,take a l =5.0m.3.3 The construction technology and key points of anchorThe anchor ’s construction technology is as follows: build-up scaffold ——excavate and clear up the slope surface ——measures to fix position ——drill hole ——washing hole ——bolt put in a certain place ——grout ——colligation the end of the anchor ——flushing the slope surface ——pouring frame space ——Spray seed(1)This slope belong to rocky slope, after excavate the slope 10 cm to the underside of the frame space, set bolt and pouring frame space, then spray grass or seeds after borrowed soil 20 cm in the frame space.(2)the slope should be payed attention to clean up, when construction. The anchor should be placed after wash hole, then put pressure (0.4MPa) and grout. After the mortar fully solidification, colligation steel, cast-in-place reinforced concrete frame space, bend the end of the anchor and bind point by point with the skeleton steel.(3)Before drilling, the hole should be measured to fix position and then do mark. Pitch deviation is less than 150mm, hole depth error is less than 50mm. Try not remold the surrounding rock, when drill. Before Put the anchor, it should be attentioned that blow wash clean the water of the hole and rock powder and so on, and rust removal the body of rod. When grouting, builders 3a bN n df ογξπshould attention the grouting pressure and mortar ratio.Fig 2 anchor field construction drawing4.ConclusionIt is economical to reinforcement slope with bolt, and use the normal equipment, It is not only achieve safe and also economy and rational.(1) Today bolt technology is widely used in the project. It is an effective reinforcement measures to constraints sliding soil with the combining of bolt and concrete slope protection.(2) We must be sure to do geological exploration work of the slope to find out the nature of the rock and hydrogeological situation before reinforcing slope by grouting bolt.(3) Due to the factors of engineering geological conditions, grouting pressure and construction technology, we should be given adequate attention to the quality of construction.Reference[1]Technical code for building slope engineering (JGJ 120-99). The People's Republic nationalstandards. Beijing: China Architecture & Building PRESS.[2] Ying-Ren Zheng, Zu-Yu Chen etc. Engineering Treatment of Slope & Landslide [M]. Beijing:China Communications Press,2007[3] LuoZhenHai. Talk shallowly the application of the anchor at the slope reinforcement[J]. FujianConstruction Science & Technology,2010,06:15-16浅谈锚杆技术在边坡工程中的应用 1.引言锚杆技术是利用锚杆周围地层岩土的抗剪强度来传递结构物的拉力或保持地层开挖面的自身稳定。

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