传输网络

In the article, it briefly analyzes the necessity of monitoring the hydric parameters and the development status of monitoring system about the electronic power, then a real-time monitoring system for generator hydric parameters is presented, which applies the configuration software MCGS, radio-communication SMS, Modbus protocol and RS-485 bus .in the design of the system, MCGS is used to configurate the interface of superordinate computer and the device component of the wireless communication is authorized by Visual Basic; the transmitting and receiving flow through GSM(Global System for Mobile communication)in the way of SMS. The design of the smart communication module, which based on the RS-485 bus and Modbus protocol and the wireless communication interface module, which is connected with the wireless terminal based on Siemens TC35, are also expounded.

该方案利用MCGS组态软件进行上位机监控界面的组态；利用Visual Basic语言进行上位机无线通信设备构件的编制；并利用SMS通过全球移动通信系统GSM(Global System for Mobile Communication)网络实现报警等数据的无线传输；以Flash型超低功耗16位单片机MSP430F149作为通用通信模块控制器核心，开发出了基于RS-485总线模式和Modbus通信协议的远程数据采集模块，以及基于Siemens TC35的无线终端相连的无线通信接口模块。

IP multicast technology can use in ltol or 1 to n data transport by Internet Protocol, it force copy data on divaricating of the distributing tree is different from unicast technology that have to repeat send the same data from information source to every receivers.

它适用于多点到多点或一点到多点的数据传输业务，其基本原则是IP组播依托IP协议完成；IP组播强制网络在数据分布树的分叉处进行信息包复制，而不是由信息源节点多次重复地发送相同的数据包。

AFDX is applied in aviation and spaceflight field more abroad with its unique advantage, but because of its communication model, It can't satisfy the requirement of divinable and low latency of the real-time mission, The research of real-time of AFDX has became a important task, To improve the real-time of the network, the most doable method is to adopt the priority management model. This paper analyzes the issue of packet transmission with different priority; gives the average queue time and stay time of packets with different priority under two queue models and gives the computer simulation.

航空电子全双工交换式以太网以其独有的优势在航空航天等领域的应用不断扩展，但是由于通信模式，无法满足实时任务的可预测性和低延迟等要求，因此，研究AFDX的实时性成为一个重要的课题，为了提高网络的实时性最可行的措施就是采取优先级管理模式，对具有优先级的分组传输问题进行了分析，给出了两种优先级排队模型下，不同优先级分组的平均排队等待时间和平均逗留时间，并进行了计算机仿真。

ABSTRACT Multimedia information on the IP networks has experienced a dramatical growth recently and the process show...

包括音频和视频在内的多媒体信息在IP网络中的传输已经具有相当的规模，并且正逐步增长。

ABSTRACT Multimedia information on the IP networks has experienced a dramatical growth recently and the process shows no sign of stop.

包括音频和视频在内的多媒体信息在IP网络中的传输已经具有相当的规模，并且正逐步增长。

Because of the limit of network bandwidth and data-packet capacity, the multiple channel transfer is evitable.

受网络带宽和数据包容量的限制，多通道传输是不可避免的。

There may be some intelligency that intellligence agencies will be able to get about it, for example, picking up that internet traffic, voicemessages, things like that , maybe that the National security agency will have some information also.

情报部门可能已经获取了一些情报，如网络传输，语言对话之类的情报。国家安全局也可能有一些情报。

The remote measure and control system based on Internet, adopting embedded system platform, accessing the Internet by lineate or radio method, will not only save the cost of invest and maintenance, so as to ensure the flexibility, real-time characteristic and reliability of data and control information, but also enhance the expansibility, transplantability of the system.

此基于互联网的远程测控通信系统，应用嵌入式系统平台采用有线与无线方式可选的接入互联网方案，不仅节省了远程监控网络的投资费用、维护成本，保证了数据和控制信息传输的灵活性、实时性、可靠性，还增加了系统的功能可扩展性、可移植性。

According to real-time requirement of stream data and losable characteristic of transportation, the thesis analysis existing stream data signature methods suc h as star-s haped tree-shaped and Golle chain. Considering the condition of limit ed resource of receiver, it proposes forward plac ed hash chain data signature sc h eme based on Gilbert-Elliot Network channel model and enhanc ed Golle chain stream data signature method.

本文针对流式数据实时性要求和传输中易丢包的特点，分析比较了现存的星型、树型、Golle链型等几种典型的流式数据签名方法，考虑到接收方资源有限的情况，基于Gilbert-Elliot网络通道模型，改进了Golle链型流式数据签名方法，提出了一种hash值前置流式数据签名方案。

After analysis of several existed satellite communication systems,a LEO/MEO satellite constellation connected by optical links and the Lagrange Relaxation Based Double-layered Satellite Routing Algorithm has been proposed.

在分析传统多层卫星网络路由算法的基础上，提出了一种基于空间光链路传输的双层卫星网络结构及其相应的基于拉格朗日松弛算法的LDSR算法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。