6.外文翻译.doc

6.外文翻译.doc
6.外文翻译.doc

外文资料翻译译文:

企业制度内部审计

你是一个自由职业者,你拥有一些审计客户,这些客户需要你对新的投资项目的建议。你同样对于该公司的情况相当了解,包括它的业务内容,商业策略,人事制度。你也很清楚自己应该怎样建议他们去吸引投资。你是穿好你的职业装带上助手给他建议呢,还是冒着失去客户的风险告诉他要他去向你的业务竞争对手去咨询?

毫不奇怪,大多数的会计师事务所都会选择前者去发展自己的业务,有相当数量的小公司现在都提供商业策略和管理咨询业务。然而,美国保险和交易委员会对审计师的独立性制定的规则使得五大会计师事务所正在疯狂的买卖变更它们公司的顾问业务,而英国的小会计公司正经历相反的情况。

“这段日子我们提供了更多地顾问和咨询方面的业务,”Matthrew Gray这样认为,它是安永的合伙人之一,“相对于审计师来说有时候我们更是一名商业建议者;最近我们开始了IT 业务的咨询。”

随着审计业务限制的免除,越来越多的家族式企业需要咨询服务,包括从开支到电子商务等很多领域。所以事务所不可能在竞争激烈的环境下,只简单的单单从事审计业务。

对安永这样的公司来讲,关键是保证他们业务随着客户的增长而增长,并且提供其客户需要的咨询服务,同时也提供其基本的审计业务。按照从伦敦经济分析学家得来的结论,90%的中小公司对它们的作为感到满意。高达94%的被采访到的中小公司不同意会计公司只能从事审计业务的观点。有76%比例并不认为审计师从事其他业务会对它的独立性产生威胁。

“小的公司对于非审计业务的依赖性更强一些。”Neil lerner解释道,他是毕马威的合伙人之一。“企业业主和企业经营者希望从会计师那里获得一系列的可信的服务。很明显,他们并不认为这样会对审计师的独立性有什么影响。”

“他们并不需要经过激烈的讨论,也不需要花钱去寻找新的合作伙伴。假如会计事务所不能提供全方位的服务,那么其客户的开支将会大大增加。”Lerner 这样认为。

John Harssion 是一个拥有五名会计师的事务所的所有者。他肯定了这个观点,“若干年来,我们开始关注商业咨询业务;我们觉得如果我们的业务不仅仅局限于审计,那么我们会更好地进行商业沟通。”

这家公司已开始就拥有两种业务-一种是审计业务,另一种事顾问/管理咨询业务,但是后者这一直没有实际运行起来。若有两支队伍,分别从事两项业务,那么从事审计业务的一方往往忽视了管理会计方面的业务也要展开,因此对于客户来讲,其支出将会大大增加。现在,将这两种业务合二为一,但同时也有公司还将审计业务和咨询业务保持分立。Harrsion更喜欢能够提供综合服务的会计师。若有人能够精通一项业务的内外事宜,他们将更加有用。他说“关键在于增加其价值,我们工作人员拥有极高的专业素质和道德修养,所以人为的界限是根本不必要的。”

中小会计师事务所联合会的主席Arthur Levitt认为他建议的严格的准则是完全必要的,因为“绝对不能让公众的利益受到任何风险。若严格的遵守这些限制,就意味着这些

事务所将失去一些能够获利的咨询业务,但Levitt认为这对于加强审计师的独立性是完全必要的,尤其是对五大会计师事务所来说。他认为:五大通常将过多的精力用在了扩张其它的业务的行为上。审计权力成了进入更为盈利业务的敲门砖。

Levitt同样建议,在一项下显而易见的命令中,激起美国职业大众对领导组织的不满,小的独立的会计师事务所应当“挺住,并且拿回应属于他们的财物,提供令人满意的私人服务。像世界上最为严厉的客观的独立的会计师一样。

在英国,同在美国一样,小的会计师事务所经常不仅经营审计和档案保管业务,而且经营商业咨询和顾问业务。但作为一名审计师,首要的要求是保持独立性,为了保证这一点,审计师必须遵循既定的条例和规则,还有基本的道德准则。

有一条既定的界限置于咨询和审计之间,Gray承认,“但是那样对于我们来说,并非实际的问题。假如我们认为那会出现利益冲突,我们经常会建议让另外的合作者去做审计业务,因为你必须严格遵守规则,但事实上,这种情况并没有出现。”

Gray认为小的会计师事务所经营情况同五大并不一样,他们所能触及的风险远不及五大;顾客也有完全不同的期望,“我们的大多数客户是家族式企业,依赖我们提供全方位的服务,他们公司本身并没有设置该方面的专家,提供经营建议是我们业务的一部分。”

这种观点得到了伦敦经济研究者的支持,52% 的小公司认为他们的会计师同样是他们的经营建议者,高于银行经理的建议。我们可以提供真正了解公司和其认识的顾问。Harrison认为。

他认为审计初衷的改变会影响小公司的商业机遇,无情的是若一些小公司失去了咨询业务,那么他们将失去生存的动力。

但答案并非是将所有的审计业务都放弃,“目前情况下,将我们同不具备会计师资格的人分开的标准是我们具有审计资格。”“培训和工作经验是非常严格的,它代表着我们很高的地位,将来最大的威胁来自这些非职业会计师,他们能以较低的价格提供服务,因为他们没有进行投资在培训上。但是目前,他们是受到限制的,因为他们只能为公司提供非审计业务。”

Gray 认为离开了咨询工作,许多小规模的审计公司将面临危险。“我们业务增长大部分集中在咨询业务上而非审计业务,因为我们的客户有减少的趋势,审计门槛的改变影响了客户。我们将继续从事审计业务,事实上最近我们还得到了两家新客户,然而实际业务的增长依赖于咨询业务。”

在五大会计师事务所实际上是管理咨询等业务反哺了审计业务和其他业务。许多的小审计师事务所机构依赖咨询业务以求得生存。但更重要的是,企业组织同时也依赖会计师的帮助,希望他们不只作为审计师而存在,同时要扮演财务顾问等方面的角色。

“作为一家小的公司你必须随着时间的推移而作相应的改变,”Gray 这样说。“企业承受了越来越多来自政府的负担,他们承担了大量的文件工作和法律责任要处理。作为会计师,我们要站在高于这个游戏的位置,在我们顾客需要的时候,提供正确的建议。”

外文原文

You are a sole practitioner. You have several audit clients, one of which needs advice on raising money for a new project. You have know the company for years and understand its business, strategy and people. You also know exactly how you would suggest that what the company needs is to talk to your competitor up road, and, risk losing your valued audit client to them?

Unsurprisingly, most accountancy firms have chosen the first option at some point in their development, and a large number of small firms now offer business strategy and management advice. And while the US securities and Exchange Commission regulations on auditor independence have drive the Big Five accountancy firms into a frenzy of buying, selling and quibbling over the names of their consultancy arms, many of the UK’s smaller accountancy firms are doing exactly the opposite.

These days we’re offering much more in the way of consultancy and business advice, agrees Matthew Gray, a partner with Grant&Co, an accountancy firm in Gloucestershire. We’re more business advisers than accountants sometimes; more recently we’ve begun to move into IT consultancy.

With the audit exemption limit rising and more and more family run business needing advice on anything from costing to e-commerce, it is simply not viable to sit firmly on one side of the fence and offer audit and nothing else.

For firms like Grant&Co, it is crucial that they are able to grow with their clients and offer the business advice they need, while also offering the staple audit services their business is built on. And according to research from economic analysts London Economics, nine out of 10 small and medium-sized(SEMs) enterprises are very pleased that they do. A whopping 94% of SEMs surveyed disagreed with the statement that accountancy firms should only be permitted to carry out audit and not offer other services, and 76%did not see that auditor independence would be compromised in any way.

“Small companies rely on their accountancy firms for more than just audit,” explains Neil Lerner, a partner at KPMG. “Busy proprietors and entrepreneurs want to be able to access a range of services from a trusted adviser; they obviously see no conflict between this and the independence role of the auditor. ”

Neither do they want the hassle and expense of searching for a new partner. “There would be a significant increase in costs for smaller companies if they were unable to use one supplier for a range of services,” Lerner admits.

John Harrison, a sole practitioner who has five consultants working for him, confirms this view. “We started focusing on business consulting a few years ago; we felt we would be of better use to the business community if our skills were more wide-ranging than just audit,” he explains. The firm originally had two arms – one audit, and one consultancy/management accounting – but this arrangement did not really work. By having two separate teams doing auditing and consulting work, the audit side would often ignore the work the management accounting arm was doing, and the costs went up for client. The two sides of the business are now one, and while some firms try to ensure that audit and consultancy are kept separate, Harrison prefers to offer clients one constant who will take care of all their needs, whether audit or business advice. “If someone knows a business inside out, they will be much more useful,” he says. “The key is to

add value. Our people have very high professional and ethical standards, which means that Chinese walls are simply not necessary.”

SEC chairman Arthur Levitt holds that the strict guidelines he has suggested are essential, because “nothing less than the public interest is at stake”. The guidelines, if implemented, would mean that many accountancy firms will be forced to give up some of the lucrative consultancy work they offer their clients, but Levitt sees this as a necessary measure to preserve auditors’ independence. The Big Five in particular, he argues, have been ”more concerned with expanding their role so broadly that, all too often, the audit responsibility becomes more of a foot in the door for other, more profitable services”.

Levitt has also suggested, in an apparent bid to stir up the grassroots of the American profession against its leadership, that the smaller independence accounting firms should “stand up and take back what some are trying to take form them; the pride and privilege of serving…as the most rigorous, obvious, objective and independent accountants in the world”.

In the UK, as in the US, smaller accountancy firms are often fully fledged business advisers and consultants as well as auditors and bookkeepers. But as auditors, the overriding requirement is for independence. To ensure this, they must comply with a raft of statutory and regulatory rules, as well as fundamental ethical guidance.

“ There is a fine line between advice and audit,” Gray admits, “but it is not really an issue for us. If we’re ever concerned that there could be a conflict of interest, we always get another partner to do the audit; you have to be strict about it. But in general it just does not come up.”Gray argues that the business smaller firms conduct is simply not the same as in the Big Five; the risk involved is much lower; and clients have different expectations. “Most of our clients are family businesses who rely on us for general advice; they don’t have the expertise within their companies. Offering business advice is part and parcel of the service we offer.”

This view is backed up by London Economics’ research, which found that 52% of smaller companies considered their accountant to be their main business adviser, ahead of bank managers. ”We can offer consultants who really understand the business and know the people,” Harrison agrees.

He acknowledges that the audit threshold change is likely to affect small firms’ business opportunities, and is adamant that without their business consultancy work, many small firms would go out of business.

But the answer would not be to abandon audits altogether, he argues. ‘At the moment, the only thing that separates us from the non-qualified people who set themselves up as accountants is that we can do audit,’ he explains. ‘The training and experience requirements are very rigorous and they demonstrate our high standards. The biggest threat in the future is going to come from these non-professional accountants, who will be able to offer much lower fees because they invest nothing in training. At the moment they can only service companies below the threshold goes up to the $4.8m mark, they will be competing with firms like ours.’

Gray agrees that without consultancy work, the future will be jeopardized. “Our business growth is mainly in consultancy rather than audit because our clients tend to be smaller and change in audit threshold has affected them,’ he says. ‘We will continue to offer auditing services, and in fact got two new audit clients recently, but the real growth is likely to be in business consultancy.’

The reality is that just as management consultancy arms in the Big Five feed off the audit arms

and vice versa, so many smaller accounting firms are dependent on more than statutory audit for their survival. But, more importantly, businesses themselves depend on their accountants to be more than just auditors – they are business advisers, often fulfilling the role of finance director for those companies that can’t afford to employ one full time.

‘As a small firm you’ve got to keep up with changing times,’ says Gray. ‘There’s an increasing burden being heaped on small businesses by the government – they have huge amounts of paperwork and legal issues to deal with. We’ve got to keep ahead to offer the right advice when our clients need it.’

毕设外文资料翻译.

理工学院 毕业设计外文资料翻译 专业:计算机科学与技术 姓名:马艳丽 学号: 12L0752218 外文出处:The Design and Implementation of 3D Electronic Map of Campus Based on WEBGIS 附件: 1.外文资料翻译译文;2.外文原文。

附件1:外文资料翻译译文 基于WebGIS的校园三维电子地图的设计与实现 一.导言 如今,数字化和信息化是当今时代的主题。随着信息革命和计算机科学的发展,计算机技术已经渗透到科学的各个领域,并引起了许多革命性的变化,在这些科目,古代制图学也不例外。随着技术和文化的不断进步,地图变化的形式和内容也随之更新。在计算机图形学中,地理信息系统(GIS)不断应用到Web,制作和演示的传统方式经历了巨大的变化,由于先进的信息技术的发展,地图的应用已经大大延长。在这些情况下,绘图将面临广阔的发展前景。电子地图是随之应运而生的产品之一。随着计算机技术,计算机图形学理论,遥感技术,航空摄影测量技术和其他相关技术的飞速发展。用户需要的三维可视化,动态的交互性和展示自己的各种地理相关的数据处理和分析,如此多的关注应支付的研究三维地图。东北石油大学及其周边地区的基础上本文设计并建立三维电子地图。 二.系统设计 基于WebGIS的校园三维电子地图系统的具有普通地图的一般特性。通过按键盘上的箭头键(上,下,左,右),可以使地图向相应的方向移动。通过拖动鼠标,可以查看感兴趣的任何一个地方。使用鼠标滚轮,可以控制地图的大小,根据用户的需求来查看不同缩放级别的地图。在地图的左下角会显示当前鼠标的坐标。在一个div层,我们描绘了一个新建筑物的热点,这层可以根据不同的地图图层的显示,它也可以自动调整。通过点击热点,它可以显示热点的具体信息。也可以输入到查询的信息,根据自己的需要,并得到一些相关的信息。此外,通过点击鼠标,人们可以选择检查的三维地图和卫星地图。 主要功能包括: ?用户信息管理:检查用户名和密码,根据权限设置级别的认证,允许不同权限的用户通过互联网登录系统。 ?位置信息查询:系统可以为用户提供模糊查询和快速定位。

外文翻译 (2)

外文翻译: 会计081班顾洁芳0804002244 Stock:Expected and unexpected return To begin, for concreteness, we consider the return on the stock of a company called Flyers. What will determine this stock’s return in, say, the coming year? The return on any stock traded in a financial market is composed of two parts. First, the normal, or expected, return from the stock is the part of the return that shareholders in the market predict or expect. This return depends on the information shareholders have that bears on the stock, and it is based on the market’s understanding today of the important factors that will influence the stock in the coming year. The second part of the return on the stock is the uncertain, or risky, part. This is the portion that comes from unexpected information revealed within the year. A list of all possible sources of such information would be endless, bet here are a few examples: News about Flyers research Government figures released on gross domestic product (GDP) The results from the latest arms control talks The news that Flyers’s sales figures are higher tan expected A sudden, unexpected drop in interest rates Based on this discussion, one way to express the return on Flyers stock in the coming year would be: Total return = expected return + unexpected return R = E (R) + U Where R stands for the actual total return in the year, E(R) stands for the expected part of the return, and U stands for the unexpected part of the return. What this says is that the actual return, R, differs from the expected return, E(R), because of surprises that occur during the year. In any given year, the unexpected return will be positive or negative, but, through time, the average value of U will be zero. This simply means that on average, the actual return equals the expected return. Risk: systematic and unsystematic The unanticipated part of the return, that portion resulting from surprises, is the true risk of any investment. After all, if we always receive exactly what we expect, then the investment is perfectly predictable and by definition, risk-free. In other words, the risk of owning an asset comes from surprises-unanticipated events. There are important differences, though, among various sources of risk. Look back at our previous list of news stories. Some of these stories are directed specifically at Flyers, and some are more general. Which of the news items are of specific importance to Flyers? Announcements about interest rates or GDP are clearly important for nearly all companies, whereas the news about Flyers’s president, its research, or its sales is of specific interest to Flyers. We will distinguish between these

外文翻译 - 英文

The smart grid Smart grid is the grid intelligent (electric power), also known as the "grid" 2.0, it is based on the integration, high-speed bidirectional communication network, on the basis of through the use of advanced sensor and measuring technology, advanced equipme nt technology, the advanced control method, and the application of advanced technology of decision support system, realize the power grid reliability, security, economic, efficient, environmental friendly and use the security target, its main features include self-healing, incentives and include user, against attacks, provide meet user requirements of power quality in the 21st century, allow all sorts of different power generation in the form of access, start the electric power market and asset optimizatio n run efficiently. The U.S. department of energy (doe) "the Grid of 2030" : a fully automated power transmission network, able to monitor and control each user and power Grid nodes, guarantee from power plants to end users among all the nodes in the whole process of transmission and distribution of information and energy bi-directional flow. China iot alliance between colleges: smart grid is made up of many parts, can be divided into:intelligent substation, intelligent power distribution network, intelli gent watt-hourmeter,intelligent interactive terminals, intelligent scheduling, smart appliances, intelligent building electricity, smart city power grid, smart power generation system, the new type of energy storage system.Now a part of it to do a simple i ntroduction. European technology BBS: an integration of all users connected to the power grid all the behavior of the power transmission network, to provide sustained and effective economic and security of power. Chinese academy of sciences, institute of electrical: smart grid is including all kinds of power generation equipment, power transmission and distribution network, power equipment and storage equipment, on the basis of the physical power grid will be modern advanced sensor measurement technology, network technology, communication

现在大学英语精读1unit11全文翻译

莫西干,我的兄弟 埃里克阿克兰 1.我发现莫西干的那年,春天比往年来得晚。那天,我正和爷爷在叉鱼,突然我听到一阵微弱的叫声,原来是一只冻得发抖的狼崽。 2.我俯下身,他虚弱地向我挪动。我把他抱了起来,把他裹在我的上衣里。我喂了他几滴热牛奶后,小莫西干就缓了过来,向我摆了摆尾巴,很快他就吃饱了,身子也暖和起来了。 3.爷爷最终也同意我收养他。 4.那一年是我人生的第十四个年头,也是我一生中最快乐的一年。

5.倒不是说我们没遇到过麻烦。莫西干是我见过最淘气的狼崽,他还对外界事物很有好奇心,比如他总想看看我奶奶的针线筐里有些什么东西,他因此打翻了针线筐,弄得满地都是线和纽扣。这时,奶奶就会拿起扫帚把莫西干轰出去,他就乖乖地躲到墙角,探头探脑,等待事态平息下来。 6.那年夏天,我和莫西干成了打猎的伙伴,我们一起捕捉犹如冲入云霄的小火箭一般活蹦乱跳的蚱蜢。到了秋天,下了第一场雪后,我们的游戏又换成了到近处的牧草地搜寻田鼠。这时,莫西干已经是一支半大的狼了,

他早已脱下了那身毛茸茸的软毛大衣,如今换上了件黑色的披风。 7.冬天很快到来,那几个月是我记忆中最快乐的日子,这是完全属于我与莫西干的美好时光。我们常常在灌木丛里点起一堆篝火,莫西干的头伏在两个前爪之间,凝视着我,听我给他讲故事。 8.这一切使我快乐的忘乎所以了,结果一天晚上我把爷爷的再三嘱咐跑到了脑后,没有把莫西干拴起来。第二天早上,叶斯诺太太气冲冲地找上门来,坚持要把莫西干给毙了,原来他夜里咬死了人家的公鸡。第三天早

上,爷爷说要把莫西干带到北边的猎棚里。 9.等我们来到猎棚附近的湖边时,莫西干似乎变得躁动起来。他常常坐在湖边,鼻子冲天,头转来转去,似乎在探测风向。 10.屋里暖烘烘的炉火使我很快就睡着了,后来不知是怎么回事,我忽然激灵一下醒了过来,我坐起身来,此时屋里洒满月光,爷爷站在我身边。“孩子,快过来看,”爷爷小声对我说。 11.外面是一轮满月,雪中的世界一片银白,他指了指湖边耸立的一块岩

外文翻译中文版(完整版)

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钢筋混凝土板的拉伸硬化过程分析 R. Ian Gilbert 摘要:当计算一个钢筋混凝土梁或板的承载力时混凝土的抗拉能力通常被忽视,尽管具体的拉应力继续进行,由于拉钢筋到混凝土之间裂缝的转换力量。这一种混凝土的拉力被称为混凝土的张力硬化。在开裂后它会影响钢筋混凝土的刚度,因此它的挠度和裂缝宽度必须根据屈服强度负载。对轻混凝土,例如楼板,全部裂缝的弯曲刚度比没有裂缝部分的要小很多,张力加劲有助于刚度。在本文中,ACI方法必须考虑到紧张加劲,欧洲和英国的方法是严格评估和预测与实验结果进行比较。最后,建议书包括建模系统紧张挠度控制的钢筋混凝土楼板设计变硬。 分类号: 1061/ASCE0733-94452007133:6899 关键词:开裂;蠕变挠度,混凝土,钢筋,适用性,收缩,混凝土砖。 简介 拉伸能力在计算时通常忽略钢筋混凝土梁或板的强度,尽管具体的拉应力继续进行,由于拉钢筋到混凝土之间裂缝的转换力量。这一种混凝土的拉力被称为张力硬化,它会影响各部分的刚度,因此必须考虑其挠度和裂缝宽度。 随着高强度钢筋的到来,增强混凝土板通常包含相对少量的拉钢筋,经常接近相关建筑法规允许的最低含量。对于这样的构件,弯曲完全开裂的一个截面刚度比未开裂的截面小许多倍,张力加劲大大促进了开裂后刚度。在设计中,挠度和裂缝的控制通常是在屈服水平调整考虑的,并在开裂后建模精确的刚度是必需的。 挠度计算中最常用的方法包括确定为破解构件平均惯性(Ie)有效时刻。几种不同的经验公式可用于Ie,包括著名的方程开发Branson(1965)和ACI 318(ACI 2005)。其他的张力硬化模式包括在Eurocode 2(CEN1992)和(British Standard BS 8110 1985),最近,Bischoff(2005)表明,布兰森的方程极高估含有少量的钢筋混凝土构件钢筋平均刚度,他提出了一个对于Ie,替代方程,这基本上是与Eurocode 2方案兼容。 在本文中,包括张力加劲的各种方法在混凝土结构设计,包括在Eurocode 2,ACI 318,BS8110模式,批判性进行评估经验预测与实测挠度进行了比较。最后,在模拟张力加劲的建议结构设计均包括在内。 开裂后弯曲响应 考虑简支一个负载变形响应,钢筋混凝土板图1所示。在负载超过负荷少的开裂,Pcr,该构件未开裂和行为均匀和弹性,以及挠度斜率是成正比的未开裂的转动惯量的转化节,. Iuncr。该构件在第一裂缝在Pcr当极端纤维在混凝土拉应力的最大部分到达混凝土弯拉强度破裂或.fr 有一个刚度突变,并立即出现裂纹。在包含破碎部分,抗弯刚度显着下降,但大部分仍然未开裂的梁。随着负载的增加,出现更多的裂缝形式和平均抗弯刚度在整个构件中减少。

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精品好文档,推荐学习交流 华北电力大学 毕业设计(论文)附件 外文文献翻译 学号:201001000826姓名:郑蓓 所在院系:电力工程系专业班级:电力1002 指导教师:刘英培 原文标题:Simulation of PMSM Vector Control System based on Non-linear PID and Its Easy DSP Realization 2014年4月10日

基于非线性PID永磁同步电机矢量控制系统仿真及其DSP实现 摘要 本文给出空间矢量脉宽调制(SVPWM)的基本原理,以及构建两条闭合回路矢量控制永磁同步电机(PMSM)的仿真模型方法。同时,在速度闭环对于新型非线性PID控制器进行了研究。仿真结果表明它具有无超调和小速度脉动良好的动态和静态性能。此外,利用在MATLAB中嵌入式目标为TI C2000(C2000 ETTI)的工具,我们将SVPWM仿真模型转换成可执行代码,并下载到TMS320F2812,实现基于DSP永磁同步电机的开环控制。这种方法避免了繁琐的编程工作,缩短了系统开发周期,实现了同步模拟和DSP实现永磁同步电机矢量控制系统的目标。 1 引言 永磁同步电机被广泛使用在交流伺服系统,因为它有如快速响应,出色的操控性能,尺寸小和重量轻等优点。最近,SVPWM技术逐渐取代了传统的SPWM。SVPWM的目的是产生磁通矢量来接近交流电机实际气隙磁通圆,通过在逆变器装置调整切换时间和控制电功率的通断模式。相较于SPWM,SVPWM 技术降低了谐波含量和开关损耗,其直流电压利用率也提高了很多。此外,它很容易被数字化。因此,我们在本文应用SVPWM技术。 原文出处及作者:Wang Song; Shi Shuang-shuang; Chen Chao, "Simulation of PMSM vector control system based on non-linear PID and its easy DSP realization," Control and Decision Conference, 2009. CCDC '09. Chinese , vol., no., pp.949,953, 17-19 June 2009

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72页 Machine Tools Objectived. Machine tools are the main engines of the manufacturing industry. This chapter covers a few of the details that are common to all classes of machine tools discussed in this book. After completing the chapter, the reader will be able to >understand the classification of the various machine tools used in manufacturing industries. >identify the differences between generating and forming of surfaces. > identify various methods used to generate different types of surfaces. >distinguish between the different accuracies and surface finishes that are achievable with different machine tools. >understand the different components of the machine tools and their functions. >learn about the different support structures used in the machine tools. >understand the various actuation systems that are useful to generate the required surfaces. >Learn the different types of guideways used in the machine tools. >understand the work holding requirements. 3.1 INTRODUCTION The earliest known machine tools are the Egyptian foot-operated lathes.

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