Based on the practical situation of highway manage corparation and the development trendency of network technique , this paper discusses the design model and module division of the highway network manage system from system analizing and software development , brings forward the concept of message platform ( mp ) and realizes it , detaily discusses the design method of electric file module and the system security , and briefely introduce the main idea of other module , for instance netmeeting , database etc . at last , in the light of above theory study , a flexible and practical compute software system is developed to be the effective management and auxiliary decision - making tool for highway management sectors 本文结合我国高速公路管理公司的实际情况以及计算机网络的发展趋势，从系统分析和软件开发的角度论述了“高速公路网络管理系统”的设计模型和模块划分，着重提出消息平台的概念并加以实现，详细讨论了电子公文模块、系统安全性的设计方法等内容，并对系统的其他模块如网络会议、数据库等的设计思路做了简要介绍。在上述设计和理论的基础上，设计开发了适合我国高速公路管理公司使用的软件系统，是高速公路管理公司有力的管理和辅助决策工具。
Those methods are innovations in technical foundation of information security , and can be put to use in many fields such as military , tele - business and so on . in this paper , the theory and technology that synchronization of hyperchaos is applied to digital cipher are mainly discussed , and two softwares are successfully programmed . one software is implemented with visual c + + , and is used for the internet communication based on tcp / ip protocols 本文主要研究超混沌同步应用于数据加密的理论和技术问题，通过编程完成两个实用混沌加密软件：一个是利用超混沌同步技术，实现计算机网络数据传输加密，即实时保密通信，通过对超混沌系统的拷贝使用，很容易实现网络用户间一对多的保密通信，可广泛用于网络广播、网络会议等。
Some applications , such as network conferencing , distributed database exploitation , require simultaneously transmitting data to multipoint from one point . multicast is becoming a key requirement of network supporting multimedia applications . it appears at the telophase in 1980 , turns into a international frontier and has already become a hostpot in this field 某些特殊的应用，如网络会议、分布式数据库开发等，都是需要把数据从一点同时发送到多点的问题，多点通信(组播)即multicast是网络支持多媒体业务的关键技术之一，产生于20世纪80年代末，已经迅速发展为一个国际前沿领域，成为研究的一个热点。
In addition to " out of the box " capabilities such as messaging , calendars , web conferences , team spaces , and chat , workplace collaboration services helps developers extend the platform to link organizational business processes to the actual methods that people use to accomplish their tasks 除了诸如消息传递、日历、网络会议、工作组空间和聊天等现有功能外， workplace coollaboration services还帮助开发人员扩展平台，以便将组织业务过程与人们使用的实际方法相联系起来，从而完成他们的任务。
Secondly , the stream media , video conference technology based on ip network and voip technology were discussed , the real - time transport protocol ( rtp ) , the real - time transport control protocol ( rtcp ) , the real - time streaming protocol ( rtsp ) , and the resource reserve protocol ( rsvp ) ware studied deeply . and the project of the stream media , video conference based on ip network and voip proposed by microsoft were introduced , too 其次，讨论了流媒体( streammedia ) 、 ip视频会议和voip技术，对实时传输协议( rtp ) 、实时传输控制协议( rtcp ) 、实时流协议( rtsp )和资源预订协议( rsvp )进行了深入的研究，并且介绍了微软提出的流媒体、视频网络会议和voip解决方案。
We develop and produce the equipment of amplifiers . the main products are as follows : digital conference system , digital frequency shift amplifiers for teaching , long distance network conference system , simultaneous interpretation system and microphone for conference and special purpose . haisheng company has been dedicating to producing professional audio frequency equipment for conference and teaching 主要产品有：数字移频扩声设备dsp声反馈抑制扩声设备数字化会议系统同声传译系统网会通网络会议用usb speaker phone回声消除器界面话筒会议式鹅颈话筒高保真会议音柱专业麦克风等。
