The technology workers of many different realms also forward the some way of big integral process method on demand of work of hisself , especially the workers in encrypting and declassifying do a very big contribution for pushing the technical of process the big integral and fast development . however because of encrypting and declassifying considers the system to support the hardware more , its method exsits localization in the aspects of data compress ability 很多领域的科技工作者,由于自身工作的需要,也针对性提出了一些大整数处理的一些思路和方法,特别是加密和解密领域的科技工作者,为推动大整数处理技术的快速发展做出很大贡献,但由于加密和解密领域考虑系统对硬件支持较多,其方法在数据处理能力和通用性方面存在局限性。
For testing and measurement of aerial electron production , the paper discussed the data compress technology , which mainly focused on progression coding technology . also the thesis discussed other widely used compress algorithms . also the thesis discussed data transmission problem and , designed its communication protocol which is designed based on udp protocol 针对这些不足，本文重点研究了分布式试验与测试数据在本地的可视化问题，论述了虚拟现实建模语言vrml在分布式虚拟环境中的应用，实现了以虚拟现实技术为核心，其它可视化技术为辅助的虚拟综合可视化。
Software part want function that realize : through interrupt service routine gather and come out regularly ecg signal , store among computer in the form of the binary scale ; data compress programme should realize to ecg signal pretreatment and compress of signal , narrow the storing amount of the data , save the space ; case information management system realize patient information and heart telecommunication file of interest , keep and in the data base , can show the ecg signal wave form at the screen of the computer directly data that gather . and has offered and type and report the single function 软件部分所要实现的功能为：通过中断服务程序把心电信号定时采集出来，以二进制的形式存储在计算机中；数据压缩程序应实现对心电信号的预处理和压缩，缩小数据存储量，节省空间；病例信息管理系统实现患者个人信息和心电信息的存档，把采集的数据保存作数据库中，能够将心电波形直接显示在计算机屏幕上，并提供打印报告单的功能。
System is made up of two parts of hardware and software , hardware part include ecg signal receive , enlarge and filter circuit and gather circuit two parts among them , design isa and pci two bus collection card of form separately ; software part include and can programme and run side by side 8255 interface and cpld and interface software design of ad574a , using interrupt way to design the software of data collecting , and realization of data compress , and software design of administrative system 本系统由硬件和软件两部分组成，其中硬件部分包括心电信号的接收、放大和滤波电路以及采集电路两部分，分别设计了isa和pci两种总线形式的采集卡；软件部分包括可编程并行接口8255和cpld与ad574a的接口软件设计、中断方式数据采集系统的软件设计、数据压缩以及病例管理系统的软件设计。
The speech quality of g . 722 . 1 almost equals that of g . 722 , and the algorithm of g . 722 . 1 is not very complex , whose coding rate is half of g . 722 . g . 722 . 2 has low coding rate but it ’ s quite complex . based on the need of the project in practice , g . 722 . 1 is chosed , which is accomplished on tms320vc5416 produced by texas instrument in america . the speech data compressed by tms320vc5416 is transmited to embedded pc through pc104 bus , and then is decoded by the decoding software in embedded pc G . 722的算法延迟很小,传输误码率低,但其编码比特率高,为64 、 56或48kbit / s ; g . 722 . 1的音质与g . 722相当,但码率降低了一半,而且算法的复杂度增加不大,一般的dsp都可以实现; g . 722 . 2的压缩码率小,但算法的复杂度很高,需要用高档dsp才可处理。
In the third chapter , it in detail discusses the main problems and how to solve them by key technologies and methods , such as streaming media , data compress standards and methods , qos , maximum client connections , database management , etc . in the fourth chapter , it elaborates how to establish such a vod system on the lan , from these aspects : encode streaming media , configure video server configuration , create jsp , develop client player , embed the player in the web page 第三章重点阐述了局域网中基于web的vod系统关键技一术问题和解决方案，具体论述了流媒体技术、数据压缩技术、服务质量（ q 。 s ）保证策略、并发用户数量问题的解决方法和数据库管理技术。在第四章中，本文根据实际开发过程，从流媒体的压制、视频服务器的配置、创建动态系统网页、客户端播放器的开发和嵌人等几个方面进行了详细的介绍。
In addition , achievement human has gained and troubles yet exist in these fields will also be involved . the key technology , also its application thinking of multimedia communication based on narrow band such as multicast , data compressing , media synchronization and distributed architecture etc , will be analysed at length , multimedia conference system based on h . 323 advice has been developed and applied to a large range 本设计首先论述了多媒体技术和通信技术在彼此的影响中发展，以及各自取得的成果和面临的问题，在此基础上，论述了窄带多媒体通信的关键技术，包括传输层协议的选取，多播，数据压缩，媒体同步和回放，以及分布式体系。
The core component of data acquiring terminal on the spot is dsp . dsp can not only complete the task of monitoring and management , but also expand the function of the system in digital filtering and data compressing . the system uses embedded modem chip with low price to modulated the data which are transmitted on the pstn 现场数据采集及发送系统的核心是dsp 。 dsp不但可以完成对现场系统的监控管理，还可以进一步扩展系统数字滤波、数据压缩等方面的功能。系统选用低价格的嵌入式modem芯片完成数据在公众电话网上的调制传输。
The paper mainly designs the electronic official document transport system , analyzes the framework , key technologies and securities . this paper put forward to the scheme about these key technologies , such as the user ' s certificate exchange , secret key management , red - header document and seal processing , files " inputting , and datum compressing . the paper introduces the detailed implement of the project with a demonstration 对电子公文传输系统的功能需求、关键技术以及安全性进行了深入研究和分析，本文重点对电子公文系统中的传输子系统作了详细的需求分析和系统结构设计，该设计全面考虑了电子公文在传输过程以及收发文过程的机密性、完整性、真实性以及不可否认性等特性，提出保障系统的机密性、完整性、真实性及不可否认性的解决方案。
