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Comparing these deviation values and the colligate error controllable limit of the ferrography technical and analysis the amount of deviation, the method of fractional precipitation is feasible in actual operation .

通过比较这些偏差值与铁谱技术的综合误差控制限度,并分析误差原因,来判定铁谱技术中磨粒分步沉积方法在实际操作中的可行性。

In addition, the petrochemical industrial application of this technology are introduced, analysis and evaluation.

综合评述了分子蒸馏技术的基本原理、技术特点、主要设备及其在石油化工工业中的应用,并对其进行分析评价。

The superiority lies in integral management and product quality and technology innovation.

论文主要采用调查成果综合分析的研究方法,通过对影响大连船用电器公司市场营销的外部环境和内部因素分别分析的基础上,找出了外部环境产生的市场过度竞争、行业效益不佳的威胁以及由于行业迅速膨胀和国民经济产值的增加带来的需求增长的机会,找出了企业在整体管理、产品质量、技术创新方面所拥有的优势以及在市场营销体制、财务状况方面的劣势,并运用SWOT分析的方法综合分析及决策,提出了战略营销的指导思想,提出了将大连船用电器公司发展成知名企业的战略规划,提出了实施措施和控制方法。

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

The status of research of mining and beneficiation technologies for iron ore resources in Anshan is analyzed.

介绍了鞍山地区铁矿资源情况,分析了鞍山地区铁矿石资源开采的综合技术和选矿技术的研究情况,对鞍山地区铁矿资源利用提出建议。

Furthermore,the behaviour of separation and preconcentration of the technology to the TCs residues in water was investigated.

课题首次提出建立集分离/富集与分析检测于一体的绿色新型综合技术,并研究该技术对水体中四环素类抗生素的分离/富集行为,旨在为控制水体抗生素残留污染奠定理论与实践基础。

This paper analyzes the status of dehumidifying techniques, summarizes the practical experiences, and describes the innovative techniques and their applications.

本文在综合分析样气除湿技术现状和总结工程实践经验的基础上,重点介绍样气除湿技术的创新及应用。

The second part of the paper introduces "the background of Chopin"s creation of piano Etude. Then through the comparison of his and the people of his time or before on Etudes, the paper concludes that Chopins" has broken the traditional meaning on this genre. In the end, the paper analyses how Chopin"s Etudes combine art with technique, through three aspects: synthetical melody and technique, colorful harmony and technique, and singular piano and technique.

第二部分首先简要介绍肖邦钢琴练习曲的创作背景;接着通过肖邦练习曲与他之前和同时代的作曲家的练习曲的比较,说明肖邦的练习曲已突破了这一体裁的传统意义;最后从三个方面:综合的旋律特征和技术的结合、丰富的和声风格和技术的结合、独特的钢琴织体和技术的结合,来阐述肖邦练习曲是艺术性和技术性的有机结合。

The paper first introduced the basic theory of pinch point technology which was a method for process energy integration, then it was applied to a crude oil heat exchangers network so as to optimize the energy utilization based on the reasonable atmospheric equipment simulation.

文章首先介绍了过程能量综合方法夹点技术的基本原理,后在对东北某石化厂常压装置模拟的基础上用夹点技术对其原油换热网络进行了节能改造优化。

On-off flexible seal system applied to oil field is very wide.

带压作业开关柔性密封系统及其控制技术是将频繁切换密封状态的开关控制型柔性密封系统及其自动控制方法和技术的分析与综合。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。