Reality television shows2 英文论文
Final version:
Reality Television Shows
Reality television shows,which featurereal people engaged in real activities rather than professional actors performing scripted scenes, are increasingly popular.Different faces sharing rare talents,inspiring stories or even overwhelming joys has become a common sight on more and more channels when you are watching TV or surfing the Internet.
However,opinions vary from individual to individual about reality television shows' pros and cons.
The advantages of reality television shows are obvious to some people. For one thing, in terms of business, the increasing popularity of reality television shows has helped the channels in generating huge revenuesby way of advertising and something else.It is the trend that more and more brands,such as Mongolian Yoghurt, are collaborating with channels in an effort of brand building that ensures channels' huger revenues. For another,reality television shows also bring great pleasure and excitement to viewers' lives. Either performers'funny programs or TV host's humorous host style can make viewers burst into laughter.Such as 'Avenue of Stars'hosted by Bi Fujian and Li Yong's well-known reality television shows.
Nevertheless, there are still quite a few people who strongly oppose these shows.The famous composer GuJianfen has said 'Reality television shows can touch everything other than viewers'hearts.Protesters think little benefit is derivedfrom watching reality television shows,instead,they firmly believe that reality television shows are actually very harmful to viewers' mental and physical well-being. Firstly,the shining stage of shows are pushing people to chasing fame insanely .Many people are so eager to become a super star overnight that they are daydreaming rather than working hard.In addition,some reality television shows which claim to be helpful can’t actually help people .For example, the reality show "The Biggest Loser",it presents everyday overweight people trying to lose weight.Actually,most people just sit in front of the television watching overweight people exercise across the screen, ,how can they lose weight successfully at last?Instead,it will have an adverseeffect on people's health.
Reality television shows have both merits and demerits.Every one of us should select the essence and discard the dross.Watching reality television shows to relax ourselves rather than losing ourselves into the shows will make us both physically and mentally healthy.
毕业论文(英文翻译)排版格式
英文翻译说明 1. 英文翻译文章输成word，5号新罗马（New Times Roman）字体，1.5倍行间距，将来方便打印和一起装订；英文中的图表要重新画，禁止截图。 2. 整篇论文1.5倍行间距，打印时，用B5纸，版面上空2.5cm，下空2cm，左空2.5cm，右空2cm（左装订）。 3. 论文翻译后的摘要用五号宋体，正文小四号宋体、英文和数字用新罗马（New Times Roman）12、参考文献的内容用五号字体。图和表头用五号字体加粗并居中，图和表中的内容用五号字体。论文翻译的作者用五号字体加粗。 论文大标题………小三号黑体、加黑、居中 第二层次的题序和标题………小四号黑体、加黑、居中 第三层次的题序和标题………小四号宋体、加黑、居中 正文……………………………小四号宋体、英文用新罗马12 页码……………………………小五号居中，页码两边不加修饰符 4. 论文中参考文献严格按照下述排版。 专著格式：序号.编著者.书名[M].出版地: 出版社, 年代, 起止页码 期刊论文格式：序号.作者.论文名称[J]. 期刊名称, 年度, 卷(期): 起止页码 学位论文格式：序号.作者.学位论文名称[D]. 发表地: 学位授予单位, 年度 例子: (1).胡千庭, 邹银辉, 文光才等. 瓦斯含量法预测突出危险新技术[J]. 煤炭学报, 2007.32(3): 276-280. (2). 胡千庭. 煤与瓦斯突出的力学作用机理及应用研究[D]. 北京: 中国矿业大学(北京), 2007. (3). 程伟. 煤与瓦斯突出危险性预测及防治技术[M]. 徐州: 中国矿业大学出版社, 2003.
毕业论文外文翻译模板
农村社会养老保险的现状、问题与对策研究社会保障对国家安定和经济发展具有重要作用，“城乡二元经济”现象日益凸现，农村社会保障问题客观上成为社会保障体系中极为重要的部分。建立和完善农村社会保障制度关系到农村乃至整个社会的经济发展，并且对我国和谐社会的构建至关重要。我国农村社会保障制度尚不完善，因此有必要加强对农村独立社会保障制度的构建，尤其对农村养老制度的改革，建立健全我国社会保障体系。从户籍制度上看，我国居民养老问题可分为城市居民养老和农村居民养老两部分。对于城市居民我国政府已有比较充足的政策与资金投人，使他们在物质和精神方面都能得到较好地照顾，基本实现了社会化养老。而农村居民的养老问题却日益突出，成为摆在我国政府面前的一个紧迫而又棘手的问题。 一、我国农村社会养老保险的现状 关于农村养老，许多地区还没有建立农村社会养老体系，已建立的地区也存在很多缺陷，运行中出现了很多问题，所以完善农村社会养老保险体系的必要性与紧迫性日益体现出来。 （一）人口老龄化加快 随着城市化步伐的加快和农村劳动力的输出，越来越多的农村青壮年人口进入城市，年龄结构出现“两头大，中间小”的局面。中国农村进入老龄社会的步伐日渐加快。第五次人口普查显示：中国65岁以上的人中农村为5938万，占老龄总人口的67.4%.在这种严峻的现实面前，农村社会养老保险的徘徊显得极其不协调。 （二）农村社会养老保险覆盖面太小 中国拥有世界上数量最多的老年人口，且大多在农村。据统计，未纳入社会保障的农村人口还很多，截止2000年底，全国7400多万农村居民参加了保险，占全部农村居民的11.18%，占成年农村居民的11.59%.另外，据国家统计局统计，我国进城务工者已从改革开放之初的不到200万人增加到2003年的1.14亿人。而基本方案中没有体现出对留在农村的农民和进城务工的农民给予区别对待。进城务工的农民既没被纳入到农村养老保险体系中，也没被纳入到城市养老保险体系中，处于法律保护的空白地带。所以很有必要考虑这个特殊群体的养老保险问题。
毕业论文外文翻译模版
吉林化工学院理学院 毕业论文外文翻译English Title（Times New Roman ，三号） 学生学号：08810219 学生姓名：袁庚文 专业班级：信息与计算科学0802 指导教师：赵瑛 职称副教授 起止日期：2012.2.27～2012.3.14 吉林化工学院 Jilin Institute of Chemical Technology
1 外文翻译的基本内容 应选择与本课题密切相关的外文文献（学术期刊网上的），译成中文，与原文装订在一起并独立成册。在毕业答辩前，同论文一起上交。译文字数不应少于3000个汉字。 2 书写规范 2.1 外文翻译的正文格式 正文版心设置为：上边距：3.5厘米，下边距：2.5厘米，左边距：3.5厘米，右边距：2厘米，页眉：2.5厘米，页脚：2厘米。 中文部分正文选用模板中的样式所定义的“正文”，每段落首行缩进2字；或者手动设置成每段落首行缩进2字，字体：宋体，字号：小四，行距：多倍行距1.3，间距：前段、后段均为0行。 这部分工作模板中已经自动设置为缺省值。 2.2标题格式 特别注意：各级标题的具体形式可参照外文原文确定。 1．第一级标题（如：第1章绪论）选用模板中的样式所定义的“标题1”，居左；或者手动设置成字体：黑体，居左，字号：三号，1.5倍行距，段后11磅，段前为11磅。 2．第二级标题（如：1.2 摘要与关键词）选用模板中的样式所定义的“标题2”，居左；或者手动设置成字体：黑体，居左，字号：四号，1.5倍行距，段后为0，段前0.5行。 3．第三级标题（如：1.2.1 摘要）选用模板中的样式所定义的“标题3”，居左；或者手动设置成字体：黑体，居左，字号：小四，1.5倍行距，段后为0，段前0.5行。 标题和后面文字之间空一格（半角）。 3 图表及公式等的格式说明 图表、公式、参考文献等的格式详见《吉林化工学院本科学生毕业设计说明书（论文）撰写规范及标准模版》中相关的说明。
java毕业论文外文文献翻译
Advantages of Managed Code Microsoft intermediate language shares with Java byte code the idea that it is a low-level language witha simple syntax , which can be very quickly translated intonative machine code. Having this well-defined universal syntax for code has significant advantages. Platform independence First, it means that the same file containing byte code instructions can be placed on any platform; atruntime the final stage of compilation can then be easily accomplished so that the code will run on thatparticular platform. In other words, by compiling to IL we obtain platform independence for .NET, inmuch the same way as compiling to Java byte code gives Java platform independence. Performance improvement IL is actually a bit more ambitious than Java bytecode. IL is always Just-In-Time compiled (known as JIT), whereas Java byte code was ofteninterpreted. One of the disadvantages of Java was that, on execution, the process of translating from Javabyte code to native executable resulted in a loss of performance. Instead of compiling the entire application in one go (which could lead to a slow start-up time), the JITcompiler simply compiles each portion of code as it is called (just-in-time). When code has been compiled.once, the resultant native executable is stored until the application exits, so that it does not need to berecompiled the next time that portion of code is run. Microsoft argues that this process is more efficientthan compiling the entire application code at the start, because of the likelihood that large portions of anyapplication code will not actually be executed in any given run. Using the JIT compiler, such code willnever be compiled.
毕业论文英文文献翻译 之 中文翻译
译文 学院：土建学院专业：土木工程学号：064&&&&&&&姓名：&&&&&& 指导教师： &&&&&&教授
江苏科技大学 2010年 03 月 28 日 均布荷载作用下挡土墙上的土压力 G. I. Shvetsov UDC 624.131.531.2 在前一篇文章中，我们确定了在只考虑填土自重的试验条件下，作用在挡土墙上的压力。这篇文章是第一篇文章的延续，致力于探索填土在外界均布荷载作用下，在挡土墙上产生的荷载问题，当在使用到先前得到的岩土平衡微分方程时，我们仅仅只改变边界条件，因为在这种情况下我们使用了与初始解决方案相同的原理。我们只提取那些与附加土压力有关的新成果，以及仅定义那些第一次出现的新符号。 在设计中，我们通常把作用在挡土墙上的土压力看作是呈三角形分布的，应力也被假设为是沿着墙体均匀连续分布的，但是实验结果并没有证实这一理论，试验表明表面
的附加应力随墙的高度变化并不均匀，而是从回填土顶部的最大值开始一直减小到其底部的最小值。因而，在M.C.瓦尔跟实验图的纵坐标的最大值超出理论计算值近两倍，最小值达到理论计算值的0.65倍，因为土压力的增加主要是在墙的上部，由此所得出的作用点比计算所得出的要高很多。 F.M.shikhiev 的理论里包含了关于挡土墙均布荷载作用下的二维应力折减问题，但是， 附加应力的分布对挡土墙受超荷载作用的效果问题的影响，并没有经过合适的理论研究。 虽然，不同研究人员所做的无数次试验已经确定，侧壁的扭曲效应更大，随着表面的粗糙程度而变大，随挡土墙的宽度和高度之比。在这篇文章里，我们将尽可能的填补这方面的空白。 在边界条件0q 0,y x ==的基础上，我们可以确定试验中作用在有侧向限制的填土上没有超荷的垂直应力。如果一个外附加应力作用在楔块表面上的强度为x σ，则在这种情况下，我们可以从已知条件得出，当y=0时，x q = x σ，既可以得出方程 ()()1 1 1/2/k x x w w h y h A q f m h A λσξ+-=+ （1） 其中 ，荷载分配的不均匀系数A 1和土的深度有关： ()() 111/1/k k A y h y h -= --- （2） 方程一是通用的，因为对于任意一种荷载分布x σ它都可以计算出任意土层中某一点的应力，因此便足以表明应力在X 轴方向的分布规律。当0=x σ时，方程便简化成相应的没有附加应力的形式，并且，当0=w f 而且0>x σ时，它反映了在考虑了附加应力条件时的二维问题，即： 11k x x h y q A h γσ?? =+- ??? （3） 满布在滑动楔上的均布荷载对我们已经知道的设计系数k ，n,和ξw 的值并没有影响，所以，计算作用在挡土墙上的正应力，切应力和总应力的表达式如下：
大学毕业论文---软件专业外文文献中英文翻译
软件专业毕业论文外文文献中英文翻译 Object landscapes and lifetimes Tech nically, OOP is just about abstract data typing, in herita nee, and polymorphism, but other issues can be at least as importa nt. The rema in der of this sect ion will cover these issues. One of the most importa nt factors is the way objects are created and destroyed. Where is the data for an object and how is the lifetime of the object con trolled? There are differe nt philosophies at work here. C++ takes the approach that con trol of efficie ncy is the most importa nt issue, so it gives the programmer a choice. For maximum run-time speed, the storage and lifetime can be determined while the program is being written, by placing the objects on the stack (these are sometimes called automatic or scoped variables) or in the static storage area. This places a priority on the speed of storage allocatio n and release, and con trol of these can be very valuable in some situati ons. However, you sacrifice flexibility because you must know the exact qua ntity, lifetime, and type of objects while you're writing the program. If you are trying to solve a more general problem such as computer-aided desig n, warehouse man ageme nt, or air-traffic con trol, this is too restrictive. The sec ond approach is to create objects dyn amically in a pool of memory called the heap. In this approach, you don't know un til run-time how many objects you n eed, what their lifetime is, or what their exact type is. Those are determined at the spur of the moment while the program is runnin g. If you n eed a new object, you simply make it on the heap at the point that you n eed it. Because the storage is man aged dyn amically, at run-time, the amount of time required to allocate storage on the heap is sig ni fica ntly Ion ger tha n the time to create storage on the stack. (Creat ing storage on the stack is ofte n a si ngle assembly in structio n to move the stack poin ter dow n, and ano ther to move it back up.) The dyn amic approach makes the gen erally logical assumpti on that objects tend to be complicated, so the extra overhead of finding storage and releas ing that storage will not have an importa nt impact on the creati on of an object .In additi on, the greater flexibility is esse ntial to solve the gen eral program ming problem. Java uses the sec ond approach, exclusive". Every time you want to create an object, you use the new keyword to build a dyn amic in sta nee of that object. There's ano ther issue, however, and that's the lifetime of an object. With Ian guages that allow objects to be created on the stack, the compiler determines how long the object lasts and can automatically destroy it. However, if you create it on the heap the compiler has no kno wledge of its lifetime. In a Ianguage like C++, you must determine programmatically when to destroy the
毕业论文5000字英文文献翻译
英文翻译 英语原文： . Introducing Classes The only remaining feature we need to understand before solving our bookstore problem is how to write a data structure to represent our transaction data. In C++ we define our own data structure by defining a class. The class mechanism is one of the most important features in C++. In fact, a primary focus of the design of C++ is to make it possible to define class types that behave as naturally as the built-in types themselves. The library types that we've seen already, such as istream and ostream, are all defined as classesthat is,they are not strictly speaking part of the language. Complete understanding of the class mechanism requires mastering a lot of information. Fortunately, it is possible to use a class that someone else has written without knowing how to define a class ourselves. In this section, we'll describe a simple class that we canuse in solving our bookstore problem. We'll implement this class in the subsequent chapters as we learn more about types,expressions, statements, and functionsall of which are used in defining classes. To use a class we need to know three things: What is its name? Where is it defined? What operations does it support? For our bookstore problem, we'll assume that the class is named Sales_item and that it is defined in a header named Sales_item.h. The Sales_item Class The purpose of the Sales_item class is to store an ISBN and keep track of the number of copies sold, the revenue, and average sales price for that book. How these data are stored or computed is not our concern. To use a class, we need not know anything about how it is implemented. Instead, what we need to know is what operations the class provides. As we've seen, when we use library facilities such as IO, we must include the associated headers. Similarly, for our own classes, we must make the definitions associated with the class available to the compiler. We do so in much the same way. Typically, we put the class definition into a file. Any program that wants to use our class must include that file. Conventionally, class types are stored in a file with a name that, like the name of a program source file, has two parts: a file name and a file suffix. Usually the file name is the same as the class defined in the header. The suffix usually is .h, but some programmers use .H, .hpp, or .hxx. Compilers usually aren't picky about header file names, but IDEs sometimes are. We'll assume that our class is defined in a file named Sales_item.h. Operations on Sales_item Objects
大学毕业论文英文翻译及原文
大学毕业论文英文翻译 中文译文 计算机网络 每个一个世纪都有一种主导地位的技术。18世纪伴随着工业革命的到来的是大型机械系统的时代；19世纪是蒸汽机的时代，而20世纪的发展历程中，关键的技术是信息收集、处理和分发。在其他的发展方面，我们还可以看到：遍布全球的电话网络的建立起来了，无线电广播和电视的出现了，计算机工业诞生了，并且以超乎想象的速度在成长；另外通信卫星也发射上天了。 技术的快速发展的一个直接结果是，这些领域正在快速地融合，信息收集、传输、存储和处理之间的差别正在迅速地消失。对于具有数百个办公室的大型组织来说，尽管这些办公室分布在广阔的地理区域中，但未来期望的情景是，工作人员只要单击一下按钮，就可以查看最远处分部的状态。随着信息收集、处理和分发能力的不断提高，我们对于更加复杂的信息处理技术的需求也增长得更快。 与其他的工业(比如汽车和航空运输业)相比，计算机工业还是非常年轻，尽管如此，计算机技术却在很短的时间内有了惊人的进展。在计算机诞生之初的20年间，计算机系统是高度集中化的，通常位于一个很大的房间中。该房间通常配有玻璃墙，参观的人透过玻璃墙可以欣赏到里边伟大的电子奇迹。中等规模的公司或者大学可能会有一台或者两台计算机，而大型的研究机构最多也就几十台计算机。要在20年内生产出大量同样功能但是体积比邮票还小的计算机，在当时的人们看来纯属科学幻想。 计算机和通信的结合对于计算机系统的组织方式产生了深远的影响。把一台大型的计算机放在一个单独的房间中，然后用户带着他们的处理任务去房间里上机，这种"计算机中心"的概念现在已经完全过时了。由一台计算机来处理整个组织中所有的计算需求，这种老式的模型已经被新的模型所取代，在新的模型下，由大量独立的，但相互连接起来的计算机来共同完成计算任务。这些系统称为计算机网络(computer networks)。如何设计这些网络，并且将这些网络组织起来，这就是本书的主题。 在本书中，我们将使用术语"计算机网络"来表示通过同一种技术相互连接起来的一组自主计算机的集合。如果两台计算机能够交换信息，则称
电子信息工程专业毕业论文外文翻译中英文对照翻译
本科毕业设计（论文）中英文对照翻译 院（系部）电气工程与自动化 专业名称电子信息工程 年级班级 04级7班 学生姓名 指导老师
Infrared Remote Control System Abstract Red outside data correspondence the technique be currently within the scope of world drive extensive usage of a kind of wireless conjunction technique,drive numerous hardware and software platform support. Red outside the transceiver product have cost low, small scaled turn, the baud rate be quick, point to point SSL, be free from electromagnetism thousand Raos etc.characteristics, can realization information at dissimilarity of the product fast, convenience, safely exchange and transmission, at short distance wireless deliver aspect to own very obvious of advantage.Along with red outside the data deliver a technique more and more mature, the cost descend, red outside the transceiver necessarily will get at the short distance communication realm more extensive of application. The purpose that design this system is transmit cu stomer’s operation information with infrared rays for transmit media, then demodulate original signal with receive circuit. It use coding chip to modulate signal and use decoding chip to demodulate signal. The coding chip is PT2262 and decoding chip is PT2272. Both chips are made in Taiwan. Main work principle is that we provide to input the information for the PT2262 with coding keyboard. The input information was coded by PT2262 and loading to high frequent load wave whose frequent is 38 kHz, then modulate infrared transmit dioxide and radiate space outside when it attian enough power. The receive circuit receive the signal and demodulate original information. The original signal was decoded by PT2272, so as to drive some circuit to accomplish
毕业论文外文翻译模版
长江大学工程技术学院 毕业设计（论文）外文翻译 外 文 题 目 Matlab Based Interactive Simulation Program for 2D Multisegment Mechanical Systems 译 文 题 目 二维多段机械系统基于Matlab 的 交互式仿真程序 系 部 化学工程系 专 业 班 级 化工60801 学 生 姓 名 李泽辉 指 导 教 师 张 铭 辅 导 教 师 张 铭 完 成 日 期 2012.4.15 顶层配置在管路等，要求设备，所有设要求，对调整使案，编是指机确保机组中资料试
外文翻译 二维多段机械系统基于Matlab 的交互式仿真程序 Henryk Josiński, Adam ?witoński, Karol J?drasiak 著；李泽辉 译 摘要：本文介绍了多段机械系统设计原则，代表的是一个模型的一部分的设计系统，然后扩展 形成的几个部分和模型算法的分类与整合的过程，以及简化步骤的过程叫多段系统。本文还介绍了设计过程的二维多段机械系统的数字模型，和使用Matlab 的软件包来实现仿真。本文还讨论测试运行了一个实验，以及几种算法的计算，实现了每个单一步骤的整合。 1 简介 科学家创造了物理模型和数学模型来表示人类在运动中的各种形式。数学模型 使创建数字模型和进行计算机仿真成为可能。模型试验，可以使人们不必真正的实 验就可以虚拟的进行力和力矩的分解。 本文研究的目的是建立一个简单的多段运动模型，以增加模型的连续性和如何 避免不连续为原则。这是创建一个人类运动模型系统的冰山一角。其使用matlab 程 序包创建的数字模型，可以仿真人类运动。 文献中关于这一主题的内容很广泛。运动的模式和力矩的分解在这些文献中都 有涉猎。动态的平面人体运动模型，提出了解决了迭代矩阵的方法。还值得一提的 是这类项目的参考书目，布鲁贝克等人提出了一个模型——人腿模型，这个以人的 物理运动为基础的平面模型仿真了人腿——一个单一的扭簧和冲击碰撞模型。人腿 模型虽然简单，但是它展示人类的步态在水平地面上的运动特征。布鲁贝克等人还 介绍，在人腿模型的双足行走的基础上，从生物力学的角度而言，符合人体步行的 特征。这个模型具有一个躯干，双腿膝盖和脚踝。它能够合理的表现出人多样的步 态风格。一个仿真人类运动的数学模型反应出了人的部分运动状态。 图1. 力的分解 2 力的分解
论文写作规范(中英文摘要及正文)-译文格式
要 随着时代的发展，人们对纺织品的要求也已经不再仅仅局限于实用。激烈的国际竞争逼使纺织企业采用高新 技术重视绿色工艺，开发环保产品则已成为新世纪市场竞争的新焦点。欧共体的Eco-label 倡导的是全生态的概念，欧盟委员会（2002/371/EC ）生态标准中，在纺织纤维中列出腈纶纤维的考核指标：原料纤维中丙烯腈的残留量应低于1.5mg/kg 。 丙烯腈是一种有毒物质，且有致癌作用。其极毒，对温血动物的毒性约为氰化氢的1/30。丙烯腈不仅蒸气有毒，而且附着于皮肤上也易经皮肤中毒。长时间吸入稀丙烯腈蒸气，则能引起恶心、呕吐、头痛、疲倦和不适等症状。由此可见，丙烯腈直接危害着人们的健康。 本文依照欧盟（2002/371/EC ）生态标准对腈纶纤维中丙烯腈残留量的控制，通过试验论证，确立了采用顶空固相微萃取和色质联用技术（HS —SPME —GC/MS ），由此建立腈纶纤维中丙烯腈残留量的测定方法。该方法具有操作简单，便捷，灵敏度高，准确性好的优点，而且仪器价格适中，便于推广。本文实验所使用的方法检测限低于0.5mg/kg ，回收率在86.2～ 关键词：腈纶，丙烯腈，残留量，气相色谱/质谱
competition, developing environmentally safe products has already become the new focus of the market competition in the new century. What Eco-label of European Community is advocated is all ecological concept , in the ecological standard of EU Committee (2002/371 / EC ), list the examination index of the fibre of the acrylic fibres in the dope-dyed fiber: The residue amount of the acrylonitrile should be lower than 1.5mg/kg in the raw materials fibre. The acrylonitrile is a kind of noxious substance extremely poisonous , the toxicity to the warm-blooded animal is about 1/30 of the hydrogen cyanide. Not only the vapour is poisonous for the acrylonitrile , but also adhere to the skin book of changes skin is poisonned. Suck the vapour of the rare acrylonitrile for a long time, can cause such symptoms as the nausea , vomitting , have a headache , tired and uncomfortable ,etc. . Therefore, the acrylonitrile is endangering people's health directly. Describe the HS-SPME-GC/MS procedure of determination method for acrylonitrile residue in acrylic fibre according to the limit control of European (2002/371/EC). The method provided very good linearity data. This method is easy to operate, highly sensitive and lower cost, easy to be extend. The limits of detection were below 0.5mg/kg, Acerage recovery between 86.2~98.6%.
电气专业毕业论文外文翻译分析解析
本科毕业设计 外文文献及译文 文献、资料题目：Designing Stable Control Loops 文献、资料来源：期刊 文献、资料发表（出版）日期：2010.3.25 院（部）：信息与电气工程学院 专班姓学业：电气工程与自动化级： 名： 号： 指导教师：翻译日期：2011.3.10
外文文献： Designing Stable Control Loops The objective of this topic is to provide the designer with a practical review of loop compensation techniques applied to switching power supply feedback control. A top-down system approach is taken starting with basic feedback control concepts and leading to step-by-step design procedures,initially applied to a simple buck regulator and then expanded to other topologies and control algorithms. Sample designs are demonstrated with Math cad simulations to illustrate gain and phase margins and their impact on performance analysis. I. I NTRODUCTION Insuring stability of a proposed power supply solution is often one of the more challenging aspects of the design process. Nothing is more disconcerting than to have your lovingly crafted breadboard break into wild oscillations just as its being demonstrated to the boss or customer, but insuring against this unfortunate event takes some analysis which many designers view as formidable. Paths taken by design engineers often emphasize either cut-and-try empirical testing in the laboratory or computer simulations looking for numerical solutions based on complex mathematical models.While both of these approach a basic understanding of feedback theory will usually allow the definition of an acceptable compensation network with a minimum of computational effort. II. S TABILITY D EFINED Fig. 1.Definition of stability Fig. 1 gives a quick illustration of at least one definition of stability. In its simplest terms, a system is stable if, when subjected to a perturbation from some source, its response to that
毕业设计英文文献翻译
青岛大学 毕业论文(设计)科技文献翻译 院系：自动化工程学院控制工程系 专业：自动化 班级：2009级4班 姓名：史发涛 指导教师：于金鹏 2013年4月10日
Providing Integrated Condition Monitoring Solutions for World Class Performance Rockwell Automation is a premier provider of Integrated Condition Monitoring Solutions (ICMS) to all major industry segments. Offering the latest state-of-the art technology in vibration analysis, oil analysis, on-line surveillance and protection systems,remote monitoring, as well as outstanding training and customer support services. Through strategic alliances with major Computerized Maintenance Management Systems (CMMS) providers Rockwell Automation can now provide integrated systems that provide critical machinery information throughout the enterprise. Portable Systems Enpac The Enpac? is a Windows CE based 2-channel high performance data collector and signal analyzer. The Enpac? collects field data, includi ng vibration information and process variables. Enpac? allows easy condition monitoring of equipment found in many process industries such as power generation, petrochemical, pulp and paper, and primary metals.The Enpac? features a built in optical (laser) tachometer, a choice of either a 1/8 or 1/4 VGA resolution screen, ability to store data on standard Type I or Type II PCMCIA cards and on-line contextsensitive HELP, built in to all applications. Online Systems Rockwell Automation offers a complete range of online hardware and software systems designed to meet your machinery protection and condition monitoring needs. When you need to protect your critical machinery assets the 6600 Series machinery protection system provides continuous monitoring. The Enw atch? Online Surveillance System is a cost-effective solution for monitoring the condition of the important machines in your plant.The 6600 Series and Enwatch? systems can be integrated seamlessly with Emonitor Odyssey?or Enshare? machinery information software. This integrated solution will provide you with a complete picture of the condition of your plant. Entrx When you need to understand how your rotating machinery is performing then Entrx is the professional’s tool. Entrx provides the means for reliable and consistent data acquisition for your entire steady state and transient machine operating modes. Entrx data acquisition hardware is fully configurable by the user and is capable of collecting data in both multiplexed and simultaneous / continuous modes. Graphical presentations of your machinery help to provide a visual display of what is happening to your machinery.