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The research work of this paper is divided into five parts: The first ,according to the work characteristics of ship's auxiliary boiler, this paper is to design applied project in the automatic control system of ship's auxiliary boiler; The second, according to the work request of the cargo winch of alternating three-speed change-pole speed-adjusting, this paper is to determine adopting the method of the PLC control; The third, this paper is to design PLC application in three -phase induction motor control, to give the ladder chart, program and input and output circuit diagram; The fourth, this paper is to research the method of the ship's combined starting screen automatic control with the PLC; The fifth, this paper is to inquire the possibility of apply the PLC in ship's engine room surveillance system; According to the comprehensive analysis of above actual example of ship's auxiliary machinery automatic system with the technique of PLC; not only can use the technique of PLC to replace traditional relay-contactor control technique in ship's auxiliary machinery automatic system, but also can get the conclusion of the former is more dependable and more clever than the latter, the maintenance is more convenient, thus develop a new path for ship automation.

本文研究的工作主要包括五个部分:第一,根据船舶辅锅炉的工作特点,设计PLC在船舶辅锅炉自动控制系统中的应用方案,主要有PLC选型及输入输出点的设计,画出系统控制梯形图并分析工作原理;第二,根据交流三速变极调速起货机的工作要求,确定采用PLC控制的方法,进行控制系统的硬件设计和软件设计,并分析工作原理:第三,设计了PLC在三相异步电动机控制中的应用,给出了控制梯形图、程序及输入、输出接线图;第四,研究了用PLC实现船舶组合起动屏自动控制的方法,进行了系统的电源设计和软件设计,给出系统工作流程图;第五,探讨了船舶机舱监视系统应用PLC的可行性,将继电器报警线路改为用PLC控制报警,给出系统硬件图和软件梯形图,并分析了PLC机的选型、抗干扰和应用PLC的经济效益和社会效益等问题。综合以上船舶辅助机械自动控制系统采用PLC技术的实例分析,可以得出船舶辅助机械自动控制系统不但可以使用PLC技术取代传统的继电器接触器控制技术,而且前者比后者更可靠、更小巧,维护保养更方便的结论,从而为船舶自动化开辟了一条新的路径。无忧毕业设计网 www.5ubs.cn

UDZ Series liquid level indicator of flap disassembly fast and convenient, the installation position can be arbitrary choice, free to change the direction of observation, thus instrumented great visibility; UDZ series of cost-effective liquid level was significantly higher than that used multiple sets of glass plate liquid level of cost performance; UDZ series of liquid level indicator, the sender's device, as well as the liquid level with the main transmission medium within the complete separation of the measured structural design, so that level gauge in the job has pressure (up to 320KG), toxic and inflammable conditions, with absolute safety and reliability; UDZ-3 type uses innovative design, improve the sensitivity of the sensor, and its near-zero drift FarEasTone signals and long-term stability so that it has always been at the scene consistent level instructions; sensors and the main body has a certain interval, which can be solved effectively under high-temperature liquids (up to 480 ) remote detection and control; antifrost type UDZ Series Level Gauge, are I plant the patented product (Patent No.: ZL00221022 3), guarantees that the use of cryogenic liquid level gauge is not freezing (such as liquid CO2), the effective guarantee of the level of a normal job.

UDZ系列液位计的翻板指示器拆装快捷方便,安装方位可任意选择,观察方向可随意改动,因而仪表指示的可视度很大;UDZ系列液位计的性能价格比明显高于采用多组玻璃板式液位计的性能价格比;UDZ系列液位计的指示器,发讯器、以及液位变送均与主体内被测介质完全隔离的结构设计,使液位计工作在有压(可达320KG)、有毒和易燃的工况下,具有绝对的安全性和可靠性;UDZ-3型采用了新颖设计,提高了传感器的灵敏度,其远传信号近乎零温漂和长期稳定性使其始终于现场液位指示保持一致;传感器和主体有一定的间隔,因而能有效地解决高温液体(可达480℃)远距离检测和控制;防霜型UDZ系列液位计,是我厂的专利产品(专利号:ZL00221022·3),保证了在低温液体上使用液位计不结冰(如液体CO2),有效的保证了液位计的正常工作。

This "importation" of the individual consciousness of the creator must however remain controlled. This is of the utmost importance, without constraints or measures we would fall either into the aesthetics of popular taste or into an escalation of elitist vocabulary that would weaken the language. If I myself no longer dare to use oil paints, to revisit or augment, it is due to its intrinsic overabundance of culture; having barely touched the palate, there is an immediate return to the domain of noble art. I would be too scared of creating some useless work while loosing the intensity afforded to a more direct language. Fluctuations in our cultural structure have resulted in vernacular embodying the new norm while I, in the domain of artistic language, have opted for the mode and techniques of traditional embroidery. A long while ago, during the time of the Yuan Ming Yuan artist village, I was convinced that I would run into problems if I applied myself to oil paint. I had produced next to nothing up until the day when, by coincidence, I noticed the many works of embroidery being sold at the entrance to the Summer Palace. I felt like I had finally found my mode of expression, my own personal artistic language. Due to the fact that embroidery belongs to the pre-industrial age, there is a "folkie" quality to it, rural and natural. This ill-defined modern world in which we live must also respond to the demands of "common people", the "lowly" and the "nouveau riche". In some sense, the re-appropriation of this folkloric technique was a necessity, much as it was during the time of the shift from "prose to spoken language" [1], an unavoidable consequence of social upheaval. It was not limited to a mere question of the stylistic signification of the semantic form. What embroidery embodies is a structural modification of society at its most basic level.

虽然它注入了艺术家的个人意识,但关键就是分寸感的把握,不然,或者伦为真的大众趣味,或者切入过多的经英语词汇,而使语言虚弱,就我而言,我不敢重操油画,或是改造扩充,就是由于它本身太文化了,一出手就高雅了,怕弄个不伦不类而失掉语言直接性的强度,文化结构的改变,艺术的俗语是一种趋势,从艺术语言上,我是用传统刺绣方式和手法的,早在圆明园画家村时,我几乎没有画出什么东西,油画肯定觉得使用起来有问题,在当时偶然在颐和园门前,看到很多刺绣的艺术品,一下子感到找到了方法,因为刺绣这种手段属于工业文明之前的东西,它有种土色和平民的感觉,这种也对应了时下的&平常人&、&小人物&、&暴发户&对现代化的消费趣味的追求,那种不伦不类的现代性,正好我的家乡唐山有一个很有名的刺绣厂,找师傅做作品可能更方便,有了这个想法之后,也得到朋友的鼓励,刺绣这一传统民间资源的再利用,在某种意义上说就像&白话文&始于当时社会巨大的转型出现的必然,它不单单是语言风格样式上的意义,它体现的是深层的社会文化结构改变的宣示。

Rare fine to the best remote control vehicle model, according to original vehicle 1 to 32 proportions fine, as slightly as a trademark, completely presses the original vehicle manufacture, the sparkling chrome-plating part, put in yours book shelf most appropriate only, the unique wristwatch infrared remote control operation, in the world the smallest remote control vehicle remote control, the ultra cruel wristwatch remote control, pressed on the wristwatch the button, could control this racing bicycle to the different direction advance, the backlash and the curve, but exchanged the ordinary vehicle mold chassis, turned an ordinary static vehicle mold, the replacement process extremely was also convenient, The entire screw organization, and has the tool oh, a vehicle actually has two uses ways, this it specialest place, the zinc base alloy +ABS engineering plastics material quality, the front of a train for the entire zinc base alloy metal manufacture, the front of a train and the oil pot might separate, the vehicle door may open, presses down on the wristwatch remote control the start key, the truck sends out immediately with the real vehicle same start thunders the sound, stopped when also had the braking sound, the ultra fine paint surface worked, the detail decided all perfect principles!

罕见的精细到极致的遥控车模型,按原车1比32比例精致,小到一个商标,全部按原车制作,闪闪发光的镀铬部件,放在您的书柜中最合适不过的了,独特的手表红外线遥控操纵,世界上最小的遥控车遥控器,超酷的手表遥控器,按动手表上的按钮,就能控制这台跑车向不同的方向前进、后退和转弯,而换上普通的车模底盘,就又变成了一部普通的静态车模了,更换的过程也极其方便,全螺丝机构,并配有工具哦,一部车却有两种使用方式,这就它最特别的地方了,锌合金+ABS工程塑料材质,车头为全锌合金金属制作,车头和油罐可分离,车门可开启,按下手表遥控器上的启动键,卡车立刻发出和真车一样的启动轰鸣声,停车时还有刹车声,超精致的漆面做工,细节决定一切的完美主义!

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推荐网络例句

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。