介绍

And the thesis is divided into 4 parts.In the first part, the development of technology on Adjustable Speed AC Dirve is introduced. And the theory of DTC is analyzed. Besides the two classic DTC strategy, the hexagon flux track and approximate circle flux track controlling system, the thesis introduces some DTC strategies modified and some new controlling arithmetics.

论文共分为四个部分：第一部分介绍了交流调速技术的发展，分析了异步电机直接转矩控制的基本原理，除六边形磁链和近似圆形磁链两种经典的DTC控制之外，还介绍了改进型DTC及其他新型的控制算法。

The equipment for the disassembly of the screw-jointed components is introduced in this paper,and the control principle and inspect devices are focused on.

本文介绍了一种螺纹连接件的拆卸装置，重点介绍了螺纹分解状态的检测装置和控制原理。

This paper introduces the common solutions to convolution integral of discrete causal series and further proposes a simpli solution using the knowledge of elementary mathematics.

本文介绍了在离散因果序列卷积和的求解中的常用解法，在此基础上应用初等数学的知识介绍了一种简便解法。

The thesis introduces the concept and evolution of NC at first, and analyzes the difference of between NC and PC, diskless workstation, and discusses emphatically the characteristics and applications of NC network architecture, then introduces the definition, the mission and the function area of network management, analyzes a few architecture of network management, and goes deep in to study Simple Network Management Protocol.

论文首先介绍了NC的概念及其发展过程，分析了NC与PC、无盘工作站的区别，重点讨论了NC网络体系结构的特点和应用。然后介绍了网络管理的定义、任务和功能域，分析了现有的几种网络管理的体系结构，并深入研究了简单网络管理协议。

In this paper, the concept of SCM and its related principles, and then on the actual system design, the basis used in the 8031 and 7 of the digital design of the production line, output display system.

本文首先介绍了单片机的相关概念以及其原理，然后介绍了实际系统的设计，在次基础了用89C52和7段数码管设计了生产流水线上产品产量显示系统。

On this basis a design scheme of the database for SCADA based on the component object model is presented, in which the content and background of IEC 61970 standard is introduced first, then some different component model are assayed , then a design scheme of the database for SCADA based on the component object model is presented, the foreground application of SCADA is connected with the database by components.The new model have some advantages: system have disrelation with develop language ,the peculiarity of COM make the system fit in with different apply program developed with different language;(2) the system can be modified and upgraded easily by means of upgrading the component modules;(3) the system can be enlarged easily by means of adding the new component modules without quiet amendment in old system.

为此，本文介绍了一种基于组件对象模型的SCADA数据库系统设计方案，文中首先介绍了IEC61970标准的内容及产生背景，分析了几种不同的组件模型，在此基础上，提出了一种基于COM组件技术的SCADA数据库设计及访问模式，在此模式下根据SCADA数据库不同的功用划分了不同的组件模块，利用组件连接数据库与SCADA前台应用，基于组件技术的SCADA数据库设计有以下一些特点：(1)与语言无关性，COM的特性决定了此系统上可以应用不同语言开发的应用程序；(2)系统易修改及维护，用户可以通过更新组件模块的方式修改及维护系统；(3)系统易扩展新的功能，用户可以通过开发新的组件方式将新的应用与原系统结合，而不用对原系统做很大的修改。

This paper introduces the development of Pareto Distribution Family and it's application in Economics, Sociology, Euthenics and Actuarial Statistics.

本文首先对Pareto分布的发展作了简单的介绍，并介绍了Pareto分布族在经济学、社会学、环境学、保险精算学中的广泛应用。

The first half of the chapter begins with the introduction of three common viewpoints over the two kinds of theories, followed by deep investigation and description of some biased nature in them, then comes up with the conclusion that we must draw a clear distinction between what was said by Marx himself and what has long been accepted as dogmatical statements. The later half of chapter introduces various understandings to the theory of three social orders evoked by the discussion of economic social formation, points out the drawbacks of and the author"s disproval to the idea that economic social formation only exists in a definite historical period. This chapter is to deepen the understanding of Marx" theory of three social orders through the discussion of the other two important theories related to it.

首先介绍了迄今为止在"三形态说"和"五形态说"的讨论中出现的三种基本观点，并分别对这些观点加以反思，通过反思指出了这几种观点中存在的一些偏颇之处，提出了在讨论三大社会形态理论和五种社会形态理论的相互关系时要对马克思本人的"五形态说"和传统的教条化的"五形态说"加以明确的区分；接着介绍了在讨论"经济的社会形态"这一范畴时所引发的对三大社会形态理论的不同理解，指出了把"经济的社会形态"理解为一种特定历史阶段的社会形态类型所产生的问题，反对把"经济的社会形态"理解为一种特定历史阶段的社会形态类型。

The background and fundamental concepts of virtual enterprise application integration were addressed firstly in Chapter 1. A state-of-the-art review of existing research, projects and applications in the domain of virtual enterprise application integration is presented.

第一章对网络化制造基本内涵及其相关研究内容作了介绍，论述了虚拟企业及其应用集成的背景和国内外研究现状，指出了当前该领域研究存在的问题，介绍了本论文的选题背景、课题来源、主要研究内容及总体结构。

Furthermore, the Matrix Dominating Set problem and some research directions on dominating problem were also introduced.

文中对VDS和EDS问题进行了分类，给出了每类问题的具体定义及其相关算法介绍，此外还对矩阵支配集问题进行了简单介绍，并提出了支配问题研究中值得关注的几个方面。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。