互连系统

ABSTRACT With the development of installed capacity and power system interconnect scale, the importance of stable monitor and control is becoming more and more obvious. The phase angle is one of basic state variable of electric power system, so monitoring and controlling power angle and phasor of the bus voltage are the most important means.

随着电网装机容量的增大及电网互连规模的扩大，电网的稳定监视和控制越来越重要，而相角是反映系统最基本的状态变量之一，因此监视和控制发电机的功角和母线电压相量，将是电力系统稳定监视和控制最重要的手段。

With the trend toward interfacing and networking in plants today, most modern CNC controllers are equipped with a standard communication interface to allow the particular machine tool to be linked to other computers and computer-driven devices.

在今天，设备的发展趋势向着界面互连和网络连接方向发展，多数现代化的 CNC 系统管理员都装备一个标准的通信界面使精确的机器刀具系统连接到其他的电脑和电脑驱动设备上。

Cluster system, a system that is connected with a group of node computers via high performance network, provides high performance, high availability services to its users as a single system.

机群系统是指将一组节点计算机通过高性能互连网络连接起来，并作为一个单一系统向其用户提供高性能、高可用服务的系统。

In this paper, a conception of computer measurement system based on virtual instrument idea is presented. The system's flexibility, expandability, interconnection and wide hardware compatibility are also emphasized.

文中提出了基于虚拟仪器的计算机测试系统的技术概念，强调系统功能的用户定义，系统的柔性、可扩充性、可互连性和对硬件设备的广泛兼容性。

The ISO／OSI is one of the most important system architectures for talking about communication. The reason that this model is so important is that it provides a complete model of the functions of a communications system so that different vendors,if they build system that conform to the model,should be able to intercommunicate lS0／0SI is divided into seven layers.

标准化／系统互连是最重要的体系结构为给出谈沟通的模式，这是很重要的原因是，它提供了一个功能完整的模型，使不同的通信系统供应商，如果他们建立的模型系统，符合应当能够互通ls0／0si分为七个层次。

It becomes more difficult to manage, integrate and share the control system real-time data when we set up the industrial real-time database because of complicated affair between every department and isomeric character of the system. A three-level-structure model and the method to establish database is provided based on CORBA criterion with its character of being regardless of programming languages, hardware platform and network protocol . A universal real-time database faces multi-system is also set up by learning the distributed criterion, it can realize the request broker , and the application software can visit the database pellucidly ; Thus the power station simulation model can be linked with the control system such as infi90 , ovation and be made use of the control object , a closed simulation and control experiment system is set up. Further more we can build an integrate automatic experiment platform from the simulation object of power plant to the process control and the to SIS. Li Ming(Control Theory and Control Engineering)Directed by associate prof. Lin Yongjun

在创建工控领域实时数据库时，企业各部门间的复杂事务及内部异构性给实时数据的管理、集成和共享带来了一定的困难，根据CORBA规范具有语言无关性、平台无关性和网络协议无关性的特点提出基于分布式计算规范CORBA的三层体系结构模型及建立与维护实时数据库的方法和途径；通过CORBA规范建立面向多个分散控制系统的通用实时数据库，实现数据访问代理，使应用软件可以透明地对实时数据库进行访问、存取、管理；将Infi90、Ovation分散控制系统与火电厂仿真机模型进行有效的互连，以全物理过程仿真数学模型为对象，构建了闭环控制仿真实验研究系统，实现数据的高效连通及管理；进而通过基于CORBA的实时数据库构建一个从火电厂仿真机对象到过程控制设备再到SIS系统的综合自动化试验平台。

In research and development of the system, mainly concluding key technologies of software-hardware environment analysis, no adapter interlink, terminal simulation, communication, sharing resources, binary file transfer algorithm , concurrent process, database-dumping and sharing, and to accomplish the basic a software design of E-classroom by adopting distribution system concept in minicomputer side , to accomplish the main software design of E-classroom by Winsock in microcomputer side , to study teacher software integration , try to realize transparent communication in the highest limit and sharing resources in the fullest extent , at last, weak and counter measure of the system is given, and the overall objective of heterogeneous computer is given to try to provide resemble system development with theory guide.

该系统的研究与设计过程中主要涉及软硬件环境分析、异型机无网卡互连、终端仿真、异型机通信、资源共享、二进制文件传输算法、并发进程、数据库转储与共享等关键技术，利用DSM分布式系统的概念完成了小型机部分电子教室的基础性软件设计，利用Winsock完成了微型机部分电子教室的主要功能模块，利用并发进程的概念研究了教师机软件的集成问题，使异型机用户之间达到最大限度的透明通信及充分的资源共享，给出了异构电子教室的弱点及解决对策，提出了系统的总体目标，力争为类似系统的研制提供理论指导。

The system was carried out with the objective ofdesigning a widespread use system which is independent of the concretetypes and use of naval and merchant ship and can be also applied toother military and industrial real-time control systems.

从技术发展观点看，它是光纤通信技术和微处理机技术相结合的网络通信系统；从应用角度看，它是满足在恶劣环境中以过程控制为目的的军事实时控制系统，由于系统中所有终端设备都带有计算机，因而从软件角度看，它是用光纤总线网络互连的集中控制的分布式计算机系统。

Furthermore, the central idea that MAN should be built in commixing transmission mode and network structure should be layered has been established as a whole direction. In the end, the particular designing precept- includingnetwork structure, routing protocol, domain name system, IP address distribution, network security, network management, accounting, traffic engineering, network interlinking, service system implement and so on, has been analized and dissertated systemically, and the corresponding material implement precept has also been brought forward.

确定了以混合传输模式为中心、网络结构分层建设的总体设计思想；对城域网建设中详细的设计方案，包括网络结构、路由协议、域名系统及IP地址分配、网络安全、网络管理、计费、流量工程、网络互连、业务系统实施方案等方面问题进行了系统的分析与论述并提出具体的解决方案。

The computer monitoring and control system bases on the technology of computer and network, which combines micro computers, digital signal processing, integrated circuit and computer communication, and recombines and interlinks the original two systems of substation as a new computer system.

变电站计算机监控系统是以计算机和网络技术为核心，将微计算机、集成路电、数字信号处理和计算机通信等新学科在变电站的集中应用，通过将变电站原来的二次系统重新组合、互连而形成的一个新的计算机系统。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐