世界杯英语扫盲
第20届世界杯刚刚落幕，对于热爱足球的球迷们，疯狂看过足球过后，让我们来了解一下与世界杯相关的英文吧。
1.无所不在的FIFA是什么？
看世界杯的时候，经常看到“FIFA”的字样在眼前飞舞。FIFA指的是国际足球联合会，简称国际足联。FIFA是法语Federation Internationale de Football Association的缩写，其英文全称是International Federation of Association Football.
2.众所周知的大力神杯的英文怎么说呢？
大力神杯：FIFA World Cup Trophy
It was introduced in 1974. Made of 18 Karat gold with a malachite base, it stands 36.8 centimeters high and weighs 6.1 kilograms. The trophy was designed by Italian artist Silvio Gazzaniga. It depicts two human figures holding up the Earth. Gazzaniga described the trophy thus, "The lines spring out from the base, rising in spirals, stretching out to receive the world. From the remarkable dynamic tensions of the compact body of the sculpture rise the figures of two athletes at the stirring moment of victory."
国际足联世界杯奖杯于1974年推出，奖杯底座为孔雀石，杯身由18K黄金铸成，高36.8厘米，重6.1公斤。第二个奖杯“国际足联世界杯奖杯”于1974年推出，奖杯底座为孔雀石，杯身由18K黄金铸成，高36.8厘米，重6.1公斤。该奖杯由意大利艺术家西尔维奥?加扎尼加设计，其造型为两个人双手托起地球。加扎尼加描述的设计创意是：“线条从底部产生，螺线升起，伸展开来接住地球。在胜利情绪沸腾的时刻，两个运动员的形象从整个杯身雕刻的动态拉伸线条中升起。”
3.The current holder of the trophy is Germany, winner of the 2014 World Cup.新近的大力神杯
获得者是德国，2014年世界杯冠军。
4.“乌龙球”就是打入自家球门的球，因此英文中就叫own goal，“进了一个乌龙球”可以用score an
own goal表示。
5.Hat trick（有时写作hat-trick）就是指“帽子戏法”，也就是在比赛中“连中三元”。这个说法首次
使用是在1858年，用来描述英国著名板球手HH?斯蒂芬森连续3次击中门柱得分，赛后为他举办的庆功会上，他得到一顶帽子作为欢庆的礼物。
接下来我们来了解一下2014年世界杯奖项及其得主吧。
1．G olden Ball - Lionel Messi (Argentina) 金球奖获得者-阿根廷的梅西
Award for the most outstanding player 颁发给每届世界杯表现最杰出的球员
金球奖Golden Ball
The Golden Ball award is presented to the best player at each FIFA World Cup finals, with a shortlist drawn up by the FIFA technical committee and the winner voted for by
representatives of the media. Those who finish as runners-up in the vote receive the Adidas Silver Ball and Bronze Ball awards as the second and third most outstanding players in the tournament respectively. Golden Ball - Lionel Messi (Argentina)
世界杯金球奖用来颁发给每届世界杯的最佳球员，由国际足联技术委员会提供候选名单，并由媒体代表票选得出。评选中的第二、三名分别获得阿迪达斯银球奖和铜球奖。（由于该奖项是由阿迪达斯公司出资赞助，因此冠以Adidas的名称。）2014年世界杯金球奖获得者是阿根廷的梅西。
2.Golden Boot - James Rodriguez (Colombia)金靴奖-哥伦比亚的J罗
金靴奖Golden Boot
The Golden Boot Award goes to the top goalscorer of the FIFA World Cup. The award was introduced at the 1930 World Cup.
世界杯最佳射手将获得金靴奖，于1930年世界杯首次颁发。
3.Golden Glove - Manuel Neuer (Germany)金手套奖-德国门将诺伊尔
The Golden Glove Award is awarded to the best goalkeeper of the tournament. Before 2010, the award was named the Yashin Award in honor of the late Soviet goalkeeper Lev Yashin. The FIFA Technical Study Group recognizes the top goalkeeper of the tournament based on the player's performance throughout the final competition. Although goalkeepers have this specific award for their position, they are still eligible for the Golden Ball as well, as when Oliver Kahn was awarded in 2002.
金手套奖颁给世界杯比赛中表现最佳的守门员。在2010年以前，这个奖项叫做雅辛奖，是以已故前苏联门将雅辛的名字命名的。国际足联技术研究小组根据世界杯决赛阶段比赛中门将的表现评出此奖。除最佳门将外，守门员仍然可以角逐金球奖，例如2002年的（德国门将）奥利弗?卡恩。
4．Best Young Player - Paul Pogba (France)最佳新秀奖---法国的保罗〃博格巴
The Best Young Player award was awarded for the first time at the 2006 FIFA World Cup in Germany and given to Germany's Lukas Podolski. The award is given to the best player in the tournament who is at most 21 years old. The election took place on FIFA's official World Cup website with the help of The FIFA Technical Study Group.
2006年德国世界杯上首次颁发了最佳新秀奖，获奖者为德国队的卢卡斯?波多尔斯基。最佳新秀奖用
来奖励世界杯赛中21岁及以下的最佳球员。这项评选在国际足联世界杯官方网站上开展，国际足联技术研究小组予以协助。
5. FIFA Fair Play Trophy: Colombia公平竞赛奖---哥伦比亚
The FIFA Fair Play Trophy is given to the team with the best record of fair play during the World Cup final tournament. Only teams that qualified for the second round are considered. The winners of this award earn the FIFA Fair Play Trophy, a diploma, a fair play medal for each player and official, and $50,000 worth of football equipment to be used for youth development. 国际足联公平竞赛奖颁发给世界杯决赛阶段比赛最公平的球队。只有进入第二轮比赛的球队才有资格参评。获奖者将荣获国际足联公平竞赛奖杯、一张证书、每位球员和球队获得一个公平竞赛奖牌、以及支持青少年足球发展的价值5万美元的足球器材。
6.Most Entertaining Team: Germany最具观赏性球队---德国
The FIFA Award for the Most Entertaining Team is a fairly new accolade for the FIFA World Cup. It is a subjectively awarded prize for the team which has done the most to entertain the public with a positive approach to the game. The award is always organized through public
participation in a poll. Recent awards have been determined by an Internet vote which may not fairly and accurately represent fan demographics.
最具观赏性球队是世界杯近些年开始颁发的一个奖项。这个奖项的评选非常具有主观性，用来奖励在比赛中积极打拼、尽力踢出漂亮足球的球队，一般由公众票选得出。近几届的奖项由网络投票得出，但对那些球迷人数少的球队来说也许不公平。
Exploring Filipino School Counselors’ Beliefs about Learning Allan B. I. Bernardo [Abstract] School reform efforts that focus on student learning require school counselors to take on important new roles as advocates of student learning and achievement.But how do school counselors understand the process of learning? In this study, we explore the learning beliefs of 115 Filipino school counselors who indicated their degree of agreementwith 42 statements about the process of learning and the factors thatinfluence this process.A principal components analysis of the responses to the 42 statements suggested three factors:(F1)social-cognitive constructivist beliefs, (F2) teacher-curriculum-centered behaviorist beliefs,and (F3) individual difference factors.The preliminary results are briefly discussed in terms of issues related to how Filipino school counselors’ conceptions of learning may guide their strategies for promoting student learning and achievement. [Key words]beliefs about learning, conceptions of learning, school counselors, student learning, Philippines School reform efforts in different parts of the world have focusedon students’learning. In particular,most school improvement programsnow aim to ensure that students acquire the high-level knowledge and skills that help them to thrive in today’s highly competitive globaleconomy (e.g., Lee & Williams, 2006). I n this regard, school reform programs draw from various contemporary theories and research on learning (e.g.,Bransford,Brown, & Cocking, 1999; Lambert & McCombs, 1998).The basic idea is that all school improvement efforts should be directed at ensuring students achieve high levels of learning or attainment of well-defined curricular objectives and standards.For example, textbooks (Chien & Young, 2007), computers and educational technology (Gravoso, 2002; Haertnel & Means, 2003;Technology in Schools Task Force, 2003), and educational assessment systems (Black & Wiliam2004; Cheung & Ng, 2007; Clark, 2001; Stiggins, 2005) are being reconsidered as regards how they can effectively provide scaffolds and resources for advancing student learning. Likewise,the allocation and management of a school’s financial resources are assessed in terms ofwhether these are effectively mobilized and utilized towards improving student learning (Bolam, 2006; Chung & Hung, 2006; Retna, 2007). In this regard, some advocates have also called for an examination of the role of school counselors in these reform efforts (Herr, 2002). Inthe United States, House and Hayes (2002) challenged school counselors to take proactive leadership roles in advocating for the success of all
关于足球的英语作文 可能关于足球的作文同学们都会写，但是写不一定都会，下面我给大家介绍，希望对您有所帮助。 足球英语作文篇一 Football is connected with the people throughout the world.It has become a part of people's life. Every day, many football matches are going on here and there around the world. Pick up a newspaper and you can learn the the results of the football matches. We enjoy playing football，watching football games after work. During the football matches of the World Cup,millions of people watch the matches on TV. When their favorite teams win，they will give them three cheers. When they fail，they feel sad. We all hope our national team will be the strongest one in the world. 足球是与世界各地的人们。它已成为人们生活的一部分。每天,很多足球比赛会在这里和世界各地。拿起一份报纸,你可以学习足球比赛的结果。我们喜欢踢足球,看足球比赛。世界杯足球比赛期间,成千上万的人在电视上观看比赛。当他们喜爱的球队赢了,他们会给他们欢呼三声。当他
青年人的四种选择 Lesson 2: Four Choices for Young People 在毕业前不久，斯坦福大学四年级主席吉姆?宾司给我写了一封信，信中谈及他的一些不安。 Shortly before his graduation, Jim Binns, president of the senior class at Stanford University, wrote me about some of his misgivings. 他写道：“与其他任何一代人相比，我们这一代人在看待成人世界时抱有更大的疑虑 ,, 同时越 来越倾向于全盘否定成人世界。” “More than any other generation, ” he said, “ our generation views the adult world with great skepticism, there is also an increased tendency to reject completely that world. ”很 明显，他的话代表了许多同龄人的看法。 Apparently he speaks for a lot of his contemporaries. 在过去的几年里，我倾听过许多年轻人的谈话，他们有的还在大学读书，有的已经毕业，他 们对于成人的世界同样感到不安。 During the last few years, I have listened to scores of young people, in college and out, who were just as nervous about the grown world. 大致来说，他们的态度可归纳如下：“这个世界乱糟糟的，到处充满了不平等、贫困和战争。 对此该负责的大概应是那些管理这个世界的成年人吧。如果他们不能做得比这些更好，他们又能拿 什么来教育我们呢？这样的教导，我们根本不需要。” Roughly, their attitude might be summed up about like this:“ The world is in pretty much of a mess, full of injustice, poverty, and war. The people responsible are, presumably, the adults who have been running thing. If they can’ t do better than that, what have they got to teach our generation? That kind of lesson we can do without. ” 我觉得这些结论合情合理，至少从他们的角度来看是这样的。 There conclusions strike me as reasonable, at least from their point of view. 对成长中的一代人来说，相关的问题不是我们的社会是否完美（我们可以想当然地认为是这 样），而是应该如何去应付它。 The relevant question for the arriving generation is not whether our society is imperfect (we can take that for granted), but how to deal with it. 尽管这个社会严酷而不合情理，但它毕竟是我们惟一拥有的世界。 For all its harshness and irrationality, it is the only world we’ ve got. 因此，选择一个办法去应付这个社会是刚刚步入成年的年轻人必须作出的第一个决定，这通 常是他们一生中最重要的决定。 Choosing a strategy to cope with it, then, is the first decision young adults have to make, and usually the most important decision of their lifetime. 根据我的发现，他们的基本选择只有四种： So far as I have been able to discover, there are only four basic alternatives: 1）脱离传统社会
Lesson One: The Time Message Elwood N, Chapman 新的学习任务开始之际，千头万绪，最重要的是安排好时间，做时间的主人。本文作者提出了7点具体建议，或许对你有所启迪。 1 Time is tricky. It is difficult to control and easy to waste. When you look a head, you think you have more time than you need. For Example,at the beginning of a semester, you may feel that you have plenty of time on your hands, but toward the end of the term you may suddenly find that time is running out. You don't have enough time to cover all your duties (duty), so you get worried. What is the answer? Control! 译：时间真是不好对付，既难以控制好，又很容易浪费掉，当你向前看时，你觉得你的时间用不完。例如，在一个学期的开始，你或许觉得你有许多时间，但到学期快要结束时，你会突然发现时间快用光了，你甚至找不出时间把所有你必须干的事情干完，这样你就紧张了。答案是什么呢？控制。 2 Time is dangerous. If you don't control it, it will control you. I f you don't make it work fo r you, it will work against you. So you must become the master of time, not its servant. As a first-year college student, time management will be your number one Problem. 译：时间是危险的，如果你控制不了时间，时间就会控制你，如果你不能让时间为你服务，它就会起反作用。所以，你必须成为时间的主人，而不是它的奴仆，作为刚入学的大学生，妥善安排时间是你的头等大事。 3 Time is valuable. Wasting time is a bad habit. It is like a drug. The more time you waste,the easier it is to go on wasting time. If seriously wish to get the most out of college, you must put the time message into practice. 译：时间是珍贵的，浪费时间是个坏习惯，这就像毒品一样，你越浪费时间，就越容易继续浪费下去，如果你真的想充分利用上大学的机会，你就应该把利用时间的要旨付诸实践。 Message1. Control time from the beginning. 4 Time is today, not tomorrow or next week. Start your plan at the Beginning of the term. 译：抓紧时间就是抓紧当前的时间，不要把事情推到明天或是下周，在学期开始就开始计划。 Message2. Get the notebook habit. 5 Go and buy a notebook today, Use it to plan your study time each day. Once a weekly study plan is prepared, follow the same pattern every week with small changes. Sunday is a good day to make the Plan for the following week.
高速视频处理系统中的信号完整性分析 摘要：结合高速DSP图像处理系统讨论了高速数字电路中的信号完整性问题，分析了系统中信号反射、串扰、地弹等现象破坏信号完整性的原因，通过先进IS工具的辅助设计，找出了确保系统信号完整性的具体方法。 关键词：高速电路设计信号完整性 DSP系统 深亚微米工艺在IC设计中的使用使得芯片的集成规模更大、体积越来越小、引脚数越来越多；由于近年来IC工艺的发展，使得其速度越来越高。从而，使得信号完整性问题引起电子设计者广泛关注。 在视频处理系统中，多维并行输入输出信号的频率一般都在百兆赫兹以上，而且对时序的要求也非常严格。本文以DSP图像处理系统为背景，对信号完整性进行准确的理论分析，对信号完整性涉及的典型问题[1]——不确定状态、传输线效应、反射、串扰、地弹等进行深入研究，并且从实际系统入手，利用IS仿真软件寻找有效的途径，解决系统的信号完整性问题。 1 系统简介 为了提高算法效率，实时处理图像信息，本图像处理系统是基于DSP+FPGA结构设计的。系统由SAA7111A视频解码器、TI公司的TMS320C6701 DSP、Altera公司的EPlK50QC208 FPGA、PCI9054 PCI接口控制器以及SBRAM、SDRAM、FIFO、FLASH等构成。FPGA是整个系统的时序控制中心和数据交换的桥梁，而且能够对图像数据实现快速底层处理。DSP是整个系统实时处理高级算法的核心器件。系统结构框图如图1所示。 在整个系统中，PCB电路板的面积仅为15cm×l5cm，系统时钟频率高达167MHz，时钟沿时间为0．6ns。由于系统具有快斜率瞬变和极高的工作频率以及很大的电路密度，使得如何处理高速信号问题成为一个制约设计成功的关键因素。 2 系统中信号完整性问题及解决方案 2．1 信号完整性问题产生机理 信号的完整性是指信号通过物理电路传输后，信号接收端看到的波形与信号发送端发送的波形在容许的误差范围内保持一致，并且空间邻近的传输信号间的相互影响也在容许的范围之内。因此，信号完整性分析的主要目标是保证高速数字信号可靠的传输。实际信号总是存在电压的波动，如图2所示。在A、B两点由于过冲和振铃[2]的存在使信号振幅落入阴影部分的不确定区，可能会导致错误的逻辑电平发生。总线信号传输的情况更加复杂，任何一个信号发生相位上的超前或滞后都可能使总线上数据出错，如图3所示。图中，CLK为时钟信号，D0、D1、D2、D3是数据总线上的信号，系统允许信号最大的建立时间[1]为△t。在正常情况下，D0、D1、D2、D3信号建立时间△t1<△t，在△t时刻之后数据总线的数据已稳定，系统可以从总线上采样到正确的数据，如图3(a)所示。相反，当信号D1、D2、D3受过冲和振铃等信号完整问题干扰时，总线信号就发生
“Hiroshima! Everybody off!” That must be what the man in the Japanese stationmaster's uniform shouted, as the fastest train in the world slipped to a stop in Hiroshima Station. I did not understand what he was saying. First of all, because he was shouting in Japanese. And secondly, because I had a lump in my throat and a lot of sad thoughts on my mind that had little to do with anything a Nippon railways official might say. The very act of stepping on this soil, in breathing this air of Hiroshima, was for me a far greater adventure than any trip or any reportorial assignment I'd previously taken. Was I not at the scene of the crime? The Japanese crowd did not appear to have the same preoccupations that I had. From the sidewalk outside the station, things seemed much the same as in other Japanese cities. Little girls and elderly ladies in kimonos rubbed shoulders with teenagers and women in western dress. Serious looking men spoke to one another as if they were oblivious of the crowds about them, and bobbed up and down re-heatedly in little bows, as they exchanged the ritual formula of gratitude and respect: "Tomo aligato gozayimas." Others were using little red telephones that hung on the facades of grocery stores and tobacco shops. "Hi! Hi!" said the cab driver, whose door popped open at the very sight of a traveler. "Hi", or something that sounds very much like it, means "yes". "Can you take me to City Hall?" He grinned at me in the rear-view mirror and repeated "Hi!" "Hi! ’ We set off at top speed throug h the narrow streets of Hiroshima. The tall buildings of the martyred city flashed by as we lurched from side to side in response to the driver's sharp twists of the wheel. Just as I was beginning to find the ride long, the taxi screeched to a halt, and the driver got out and went over to a policeman to ask the way. As in Tokyo, taxi drivers in Hiroshima often know little of their city, but to avoid loss of face before foreigners, will not admit their ignorance, and will accept any destination without concern for how long it may take them to find it. At last this intermezzo came to an end, and I found myself in front of the gigantic City Hall. The usher bowed deeply and heaved a long, almost musical sigh, when I showed him the invitation which the mayor had sent me in response to my request for an interview. "That is not here, sir," he said in English. "The mayor expects you tonight for dinner with other foreigners or, the restaurant boat. See? This is where it is.” He sketched a little map for me on the back of my invitation. Thanks to his map, I was able to find a taxi driver who could take me straight to the canal
GRA VITY RETAINING?WALL 1. INTRODUCTION Retaining walls are structures used to provide stability for earth or other material where conditions disallow the mass to assume its natural slope, and are commonly used to hold back or support soilbanks,coal or ore piles, and water. Retaining walls are classified, based on the method of achieving stability, into six principal types (Fig.1). The gravity-wall depends upon its weight, as the name implies, for stability. The cantilever wall is a reinforced-concrete wall that utilizes cantilever action to retain the mass behind the wall from assuming a natural slope. Stability of this wall is partially achieved from the weight of soil on the heel portion of the base slab. A counterfort retaining wall is similar to a cantilever retaining wall, except that it is used where the cantilever is long or for very high pressures behind wall and has counterforts, which tie the wall and base together, built at intervals along the wall to reduce the bending moments and sheers. As indicated in Fig.1c, the counterfort is behind the wall and subjected to tensile forces. A buttressed retaining wall is similar to a counterfort wall, except that the bracing is in front of the wall and is in compression instead of tension. Two other types of walls not considered further are crib walls, which are built-up members of pieces of precast concrete, metal, or timber and are supported by anchor pieces embedded in the soil for stability, and semigravity walls, which are walls intermediate between a true gravity and a cantilever wall. (a)(b)(e)
―Hiroshima! Everybody off!‖ That must be what the man in the Japanese stationmaster's uniform shouted, as the fastest train in the world slipped to a stop in Hiroshima Station. I did not understand what he was saying. First of all, because he was shouting in Japanese. And secondly, because I had a lump in my throat and a lot of sad thoughts on my mind that had little to do with anything a Nippon railways official might say. The very act of stepping on this soil, in breathing this air of Hiroshima, was for me a far greater adventure than any trip or any reportorial assignment I'd previously taken. Was I not at the scene of the crime? The Japanese crowd did not appear to have the same preoccupations that I had. From the sidewalk outside the station, things seemed much the same as in other Japanese cities. Little girls and elderly ladies in kimonos rubbed shoulders with teenagers and women in western dress. Serious looking men spoke to one another as if they were oblivious of the crowds about them, and bobbed up and down re-heatedly in little bows, as they exchanged the ritual formula of gratitude and respect: "Tomo aligato gozayimas." Others were using little red telephones that hung on the facades of grocery stores and tobacco shops. "Hi! Hi!" said the cab driver, whose door popped open at the very sight of a traveler. "Hi", or something that sounds very much like it, means "yes". "Can you take me to City Hall?" He grinned at me in the rear-view mirror and repeated "Hi!" "Hi! ’ We se t off at top speed through the narrow streets of Hiroshima. The tall buildings of the martyred city flashed by as we lurched from side to side in response to the driver's sharp twists of the wheel. Just as I was beginning to find the ride long, the taxi screeched to a halt, and the driver got out and went over to a policeman to ask the way. As in Tokyo, taxi drivers in Hiroshima often know little of their city, but to avoid loss of face before foreigners, will not admit their ignorance, and will accept any destination without concern for how long it may take them to find it. At last this intermezzo came to an end, and I found myself in front of the gigantic City Hall. The usher bowed deeply and heaved a long, almost musical sigh, when I showed him the invitation which the mayor had sent me in response to my request for an interview. "That is not here, sir," he said in English. "The mayor expects you tonight for dinner with other foreigners or, the restaurant boat. See? This is where it is.‖ He sketched a little map for me on the back of my invitation. Thanks to his map, I was able to find a taxi driver who could take me straight to the canal
文档简介 一，英语翻译经典文章之英文原稿二，中文翻译：这篇英语文章的最好翻译版本！不是俺说的，是俺老师说哒！！ 英文原稿Brian It seems my only request (“please, let me sleep”) is not clear enough, so I made this simple table that can help you when you’re in doubt. Especially during the night
中文翻译小子： 我只想好好地睡觉，你不明白吗？！所以，我做了这个简表。当你不知道怎么办时，特 别是在晚上的时候，你可以看看它。 具体情况行动指南 1，我正在睡觉禁止进入 2，你不确定我是否睡觉，你想搞清楚管你“鸟”事；禁止进入 3，你嗑了药，想奔向我的床你他妈的滚远点 4，你在youtube上看了一个超赞的视频，禁止进入；在脸书上把链接发给我想让我看看 5，就算第三次世界大战开始了管我屁事，他妈的别进来 6，你和你的基友们想和我“玩玩”抱歉，直男一枚。不要碰我的任何东西，门都别碰 7，你想整理我的房间我谢谢你了！我自己会打扫 8，普京宣布同性婚姻合法化终于等到“它”！还好你没放弃！还是不要来我房里！ 9，我不在家进我房间，想都别想 10，白天，我在家。你敲了门，我说“请进” 你可以进来了 福利放送！！
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Basic Control Actions and Industrial Automatic Control An automatic controller compares the actual value of the plant output with the desired value, determines the deviation, and produces a control signal which will reduce the deviation to zero or to a small value.The manner in which the automatic conroller produces the control signal is called the control action. Classifications of industrial automatic controllers Induetrial automatic controllers may be classified according to their control action as: ·two-position or on-off controllers; ·proportional controllers; ·integral controllers; ·proportional-plus-integral controllers; ·proportional-plus-derivative controllers; ·proportional-plus-derivative-plus-integral controllers. Most industrial automatic controllers use eletricity or pressurized fluid such as oil or air as power sources. Automatic controllers may also be classified according to the kind of power employed in the operation, such as pneumatic controllers, hydraulic controllers, or electronic controllers.What kind of controller to use must be decided by the nature of the plant and the operating conditions,including such considerations as safety, availability, reliability, accuracy, weight, and size? Elements of industrial automatic controllers An automatic controller must detect the actuating error signal, which is usually at a very low power level, and amplify it to a sufficiently high level. Thus, an amplifier is necessary. The output of an automatic controller is fed to a power device, such as a pneumatic motor or valve, a hydraulic motor, or an electric motor. The controller usually consists of an error detector and amplifier. The measuring element is a device that converts the output variable into another suitable variable, such as a displacement, pressure, or electric signal, which can be used for comparing the output to the reference input signal. This element is in the feedback path of the closed-loop system. The set point of the controller must be converted to a reference input of the same units as the feedback signal from the measuring element. The amplifier amplifies the power of the actuating error signal, which in turn operates the actuator. The actuator is an element which alters the input to the plant according to the control signal so that the feedback signal may be brought into correspondence with the reference input signal. Self-operated controllers In most industrial automatic controllers, separate units are used for the measuring element and for the actuator. In a very simple one, however, such as a self-operated controller, these elements are assembled in one unit. Self-operated controllers utilize power developed by the measuring element and are very simple and inexpensive. The set point is determined by the adjustment of the spring force. The controlled pressure is measured by the diaphragm. The actuating error signal is the net force acting on the diaphragm. Its position determines the valve opening. The operation of self-operated controller is as follows: Suppose that the output pressure is lower than the reference pressure, as determined by the set point. Then the downward spring force is greater than the upward pressure force, resulting in a downward movement of the diaphragm. This increases the flow rate and raises the output pressure.