通信网络

For Profibus network communication of master and slave station,the system works reliably and is adaptable to large and media scale water factory.

由于该系统的主、从站设备间采用Profibus网络通信，运行可靠，适用于大、中规模的水厂。

Based on traditional instrument,through SPC3 chip communication protocol conversion,the instrument can be linked from slave station to Profibus fieldbus network,thus digitaI signal transmission is implemented.

在传统仪表的基础上，通过SPC3芯片通信协议转换，可以使仪表从站挂接到Profibus现场总线网络上。从而实现数字信号的传输。

She will set up a new way of the SOE's innovation and development.

中国网络通信有限公司正是在这种情况下成立的。

A real time communication interface between DTS and SOTS based on TCP/IP protocol is designed and implemented. The DTSs and SOTSs on different nodes of a network are interconnected together by the interfaces, and a new and powerful cooperative simulator is formed.

设计开发了基于TC/IP协议的DTS-SOTS实时通信接口，该接口将分布在网络中不同节点上的DTS和SOTS联系起来，形成了一个电网仿真和变电站仿真有机结合的一体化系统。

Besides,they also visited the aptitude lab of Professor Chen Xiaoping in Computer department,the Xunfei sound lab of professor Wang Hua in electron and information department,and professor Wei Guo and Wang Weidong's wireless net lab.

此外，沈院长一行还分别参观了我校计算机系陈小平教授的多智能体系统实验室、电子工程与信息科学系王仁华教授的讯飞语音实验室，以及卫国、王卫东教授的无线网络通信实验室。

For reducing the LEMP lighting electromagnetic pulse radiation, the electrical source uses the Box-type power supply arrester, the power supply arrester and the modular power supply arrester as the third SPD surge protection device. The Low-voltage surge arrester or spark gap is laid between the compute net and equipotential grounding grids for avoiding signal interference and counterattack of ground voltage. The parameter and model of the signal lighting-protector of lines of communication are chosen according to the transfer rate, work level and characteristic impedance.

对控制房和DCS柜采用避雷针、独立针的直接雷防护；系统电源分别采用箱式电源避雷器、电源避雷器、模块式电源避雷器作为三级电源保护，减少LEMP雷电电磁脉冲辐射；计算机网络与等电位地网间设置低压避雷器或火花隙防止信号干扰和避免地电压反击；根据传输速率、工作电平、特性阻抗等，选择通信线路的信号防雷保护器的参数和型号。

These signature technologies have the advantages of safety and speediness,they are suitable for internet data communication in different areas.

这些算法具有安全、快捷等特点，适合于不同应用场合的网络数据通信。

The combination of monitoring technology, computer technology and communication make Internet spreader and developed rapidly in the field of measurement and control system.

在测控领域，监控技术、计算机技术和通信技术的紧密结合使计算机网络得以普及和发展。

In this thesis, how to study and apply of system of CRM based on Web are discussed. Firstly, we summarize the principle of CRM, beginning with the current research condition, and introduce the concept, features and management principle of CRM. Secondly, we illustrate the basic architecture of web-based CRM system to form the basis of the further research and propose the integration of CRM system to the front end of enterprise, namely, the study on the business process re-engineering of CRM system. Then we discuss the key technique knowledge on CRM system based on Web, which included the technology of system interface, system safety and the design of net framework. And explain the technology of web service is a good solution to the problem of system interface in the Internet and the advantage of the develop way based on the B/S pattern. According to an application of CRM system based on Web, this thesis explains how to set up a CRM system based on Web, which include the customer requirement, analyzing the business process, system framework and system safety. At last, this thesis puts forward the extensive foreground of the system of web-based CRM with the expanding of the web technology and explains that there are some questions are to be resolve stilly in this thesis.

本文的研究内容首先从客户关系管理的研究现状出发，对客户关系管理加以概述，阐述CRM系统概念、系统特点和核心管理思想；并阐明了基于Web的CRM系统的基本架构为进一步的研究作铺垫，提出CRM系统对企业前端的整合，即对CRM系统的业务流程重构的研究；接下来说明基于Web的CRM系统开发的关键技术，包括系统体系结构的选择，系统接口以及系统安全三方面的技术要求，具体说明了B/S模式的原理及优点，Web Service是解决基于B/S模式系统的接口问题的最好方案；然后以一个销售管理CRM系统为例，说明如何构建一个基于Web的CRM系统，包括了系统设计要求、系统实现、系统功能框架和系统安全机制；最后根据当前通信和网络技术的发展，展望基于Web的CRM系统应用的广泛前景，并对在本文研究中还存在需要改进的地方进行了探讨。

In Broad Band ,Curcuit signal graphics is achieved by oscillograph ,and packet loss rate , throughput, Latency , back-to-back and so on.;In VoIP, the device can communicate with FXO 3804 of TAIWAN Welltech and DT60 of BEIJING JIAXUN FEIHONG, At that time, Ethereal and PalmTool of PA1688 testing are introduced; In CATV, flatness ,signal graphics of radio frequency are tested by CATV stroboscope.

使用示波器测试数据部分的电路信号波形，使用网络分析仪测试丢包率、吞吐量、时延和背压等以太网指标的测试，并记录最终测试结果；电话部分主要是与台湾伟桥的FXO 3804和北京佳讯飞鸿的E1数字中继网关DT60，实现基于H.323协议的VoIP电话通信，同时介绍使用Ethereal软件和PA1688专用测试工具PalmTool的测试分析情况；电视部分主要是使用CATV频谱仪测试输出射频信号的平坦度、信号波形等分析信号质量，并通过实际电视接收观察输出的射频信号质量。

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。