通信网络

This situation, especially for circuital resource administration, has brought about big challenge. We need to build a set of management system to satisfy the need of communication resource management, which is high-effect.

作为电力安全生产的支撑网络，电力通信网络也在随电网的发展不断扩大覆盖范围，这对通信资源管理特别是电路资源管理带来了严峻的挑战，迫切需要建立一套以数据为中心的通信资源管理系统来满足系统管理及通信调度的需求。

Firstly, the characteristics of CAN bus are analyzed and it's reliability、expeditiousness and flexibility are tested. A communication network of substation automation system constructed on CAN bus is presented and confirmed. Secondly, the dissertation discusses the main structure of substation automation system, as well as the content and request of substation digital communication. According to this, it gives the project of constructing the substation CAN communication network and the communication protocol. And according to different requests of power system, it makes research and tests of the calculation of the communication parameters in the network. Communication manager is the key to communication network based on CAN bus.

论文首先分析了CAN总线的特性，对其可靠性、实时性、灵活性进行了实践验证，确定了用CAN总线来构建变电站综合自动化系统数据通信网络的可行性，并在对变电站综合自动化系统的结构及数据通信的内容和要求做了研究和分析的基础上提出了基于CAN总线的变电站综合自动化数据通信网络的构建方案，编制了相应的基于CAN总线的变电站综合自动化系统通信协议，同时针对电力系统的不同要求，对CAN总线通信网络中通信参数的计算进行了研究和验证。

This paper designs a communications network of distributed structure in filling station and introduces the composition of the system.

文章对汽车加油站IC卡智能化收费系统分布式结构的通信网络进行了设计，介绍了其系统的构成，对通信网络的结构、协议以及通信接口电路。

With the further development of computer network, communication network and the distributed system, communication protocols are more and more complicated, formal description technology plays the indispensable role in the network protocol design. LOTOS - as one of the ISO standards of FDT, is designed for distributed systems, especially for communication service and communication protocol.

随着计算机网络、通信网络以及分布式系统的不断发展，通信协议有日渐复杂化的趋势，形式描述技术在网络协议设计中占有举足轻重的作用，作为国际化标准之一的LOTOS技术是专为分布式系统设计的形式描述技术，特别是通信服务和协议。

A method of constructing a repair path around a non-available component in a data communications network having, as components, nodes having a network address and links there between comprises the step, performed at a participating node, of receiving from a notifying node in the network, a notification identifying the notifying node and components through which the notifying node can be reached.

公开了一种在数据通信网络中构造绕过不可用组件的修复路径的方法，该数据通信网络具有作为组件的具有网络地址的节点和其间的链路，该方法包括以下步骤：在参与节点处执行从网络中的通知节点接收标识通知节点和通过其可以到达通知节点的组件的通知。

In order to improve performances of computer communication networks, the important route selection optimization in computer communication networks is firstly studied in detail by using the modern metaheuristic search method, i. e., Tabu search, which is of great flexibility and came into use just a few years ago. Better results are obtained and compared with the traditional Lagrangean relaxation and subgradient optimization method. Especially, the superiority of this method over other algorithms is further shown in the case of very heavily loaded network. Thus, the new thinking and method are provided for the optimization theory of computer networks.

摘 要：为了改进计算机通信网络的性能，首次采用近年来才开始应用、且具有很强灵活性的现代超启发式搜索方法——Tabu搜索方法，对计算机通信网络中重要的路由选择优化问题进行了详细的研究，得到了比经典的拉格朗日松弛及子梯度优化方法更优的结果，尤其在网络负荷很重的情况下，与其它算法相比，更显示出该方法的优越性，从而为计算机网络的优化理论提供了新的思路和方法。

In the design of the software and communication network, the concept of TTCAN makes CAN communication more soft and rhythmical. Moreover, the real-time communication between the control network for field device and information network is completely realized by Internet. As a result, the campus electricity consumption can be remotely detected, reliably monitored, and safely maintained in real-time.

通信网络及软件上采用TTCAN概念对CAN网络进行有序化，建立TTCAN通讯机制，进而通过转换接口接入Internet，实现控制网络与信息网络实时通信，便于安全、实时、可靠地实现远程监控、诊断和维护校园用电。

Taking the communication server as the core,the data transmission layer collects data from other intelligent devices with 103 protocols,Modbus protocols,pro-bus protocols or TCP / Modbus protocols,which are converted as dual Ethernet network data and then transmitted to monitoring system and dispatch center via hub.

重点介绍了通信网络的构成，网络管理层基于TCP/IP的以太网络通信，采用站内103通信规约，数据传输层以通信服务器为核心，向下采集其他智能设备数据，支持任何采用103规约及采用Modbus通信规约、pro-bus通信规约或采用TCP/Modbus协议的智能设备，并将采集到的数据转换成以太网双网数据，通过交换机上传至监控系统及调度中心。

Letter Alvarion mainly engaged in microwave radio frequency wireless communications products and network optimization system covering the development, production, marketing and provision of appropriate services, mobile communications operator wireless network equipment supplier of professional services and systems integration Business.

奥维通信主要从事微波射频产品及无线通信网络优化覆盖系统的开发，生产，销售和提供适当的服务，移动通信运营商的无线网络，专业服务和系统集成商设备供应商。

Was founded in December 2000, is headquartered in Shenyang, China, is a professional engaged in microwave RF products and wireless communications network system development, production, marketing and providing the corresponding services in the state's key high-tech enterprises, are domestic and international communications operator professional wireless network coverage equipment suppliers and service providers.

奥维通信股份有限公司成立于2000年12月，总部设在中国沈阳，是一家专业从事微波射频产品及无线通信网络覆盖系统开发、生产、销售并提供相应服务的国家重点高新技术企业，是国内外通信运营商无线网络覆盖设备专业供应商及服务商。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷