通信的

CAMPI library is implemented above MPI which must be installed firstly, such as MPICH. CAMPI is designed to send the minimal amount of data over the slow campus area links, and to only incur a single wide area latency.

本文中基于校园网络的优化集合通信操作库CAMPI的核心设计思想，是在相对缓慢的校园网络上发送尽可能少的数据，并且每次通信只发生一次不同局域网之间的通信延迟。

Firstly, this paper puts forward an improved authentication and key distribution scheme for internet environment, in which we adhibit multilevel authentication center, encryption technology of DES, RSA and one-way function to actualize the safety of communication among the different user on network and reduces the workload of the authentication institution; at the same time, this scheme can also assure the security of network. Besides, it use the temporary symbol and the responds" sign of both-side correspondent to replace time stamp and applies them to internet communication to countercheck "rebroadcast attack and accordingly resolves the problem that it needs synchronization for network clock.

本文在首先提出一种改进的Internet网络环境下的认证及密钥分配方案，该方案考虑采用了多级认证中心，DES、RSA和单向函数加密机制，实现了网络上不同用户间的安全通信，降低了网上认证机构的工作量，同时也能够保证网络的安全性；并用通信双方的临时标志和响应者标识来代替时间戳应用于Internet通信中以防止"重播"攻击，从而解决了以往需要网络时钟同步这一难题。

To meet the challenge of future mobile communication and integrated communication and radiolocation systems, a new quaternary 8 phases space-time modulation technique with 36-element circular array antenna is proposed.

针对通信定位综合一体化的趋势和未来移动通信发展的需要，本文提出了一种新颖的四进制八相时空调制技术，设计了一种利用36元均匀间隔圆阵天线发射的通信定位综合化系统。

At the beginning the dissertation introduced the new techniques and methods in modern HF communication, and then put emphasis on the introduction of ABCS, including its basic theories, main characters and advantages over traditional HF communication system.

论文首先介绍了现代短波通信中的新技术与新体制，然后重点介绍了陆建勋院士提出的ABCS通信系统，分析了ABCS的理论基础、主要特点及相对于传统短波通信体制的优势。

ITU-T has released some standards about multimedia communication in the past several years, especially H.323 Standard, which provides a unifiable standard for multimedia communication based on IP communication.

与此同时，国际电联标准化组织先后推出了一系列与多媒体通信相关的协议，特别是ITU-T推出的基于IP分组网络的多媒体通信终端协议——H.323，为基于IP的多媒体通信提供了规范。

It analyzed the remote communication means between client and server, the function of data marshal and unmarshal and the data security while communicating.

分析了远程通信中涉及的数据处理功能，包括数据的编码解码、数据的安全以及通信时的通信负载处理。

Because It has stronger ability of resisting narrow band,multipath and jamming interference than that of the conservational communication systems,and also has advantages of concealed information and multiple access secure communication,thus the spread spectrum communication technology draws the people's attention more and more.

由于扩频通信系统与常规的通信系统相比，具有很强的抗窄带干扰，抗多径干扰，抗人为干扰的能力，并具有信息隐蔽、多址保密通信等优点，因而越来越受人们的重视。

The first part of paper macroscopically introduces the history of the communication industry development and the current situation of global communication industry.

本文第一部分从宏观上介绍了通信产业的发展历程以及目前全球通信产业的现状，旨在对整个通信产业作一个宏观的描述和定性的分析。

When the communication protocol is T53, the portable telephone apparatus performs a plurality of procedures from an idle state through to a traffic channel state in a standard manner, but when the communication protocol is IS-95, the potable telephone apparatus controls wireless communication by replacing one procedure of the plurality of procedures performed from the idle state through to the traffic channel state with another procedure.

当通信协议是T53时，便携式电话装置就以一种标准的方式执行从一个空载状态直到一个话务信道状态的多个程序，但当通信协议是IS－95时，便携式电话装置就通过用另一个程序来替换从空载状态直到话务信道状态的多个程序的其中一个程序来控制无线通信。

And the technology of Java Applet and Web database is introduced in detail. The particular design of the reuse-water remote monitoring and control system is purposed. The concrete hardware structure and software unitary design suppose is put forward, and achieving the tight joint between monitoring and control technology and network technology, the serial programming is used to the data collection in the system.

论文详细设计了中水回用远程监控系统，提出了基于Web的中水回用远程监控系统的具体硬件结构方案和软件的整体设计思路，实现了监控技术与网络技术的紧密结合，应用串行通信技术进行数据采集，使用Java Applet和Socket通信技术解决远程实时通信问题。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。