钢铁厂司秤管理系统

系统由若干个司秤站（从站）进行现场自动司秤、数据库建立、数据汇总、数据传送及现场打印；主站（计量部门）将司秤站传送来的数据作检索、汇总及统计，形成各种报表．通信采用ＲＳ４２２接口．管理软件用ＢｏｒｌａｎｄＣ＋＋及汇编语言混合编制．采用全屏幕下拉式菜单作为人－机界面．     

风靡全球的INTERNET网络

介绍了ＩＮＴＥＲＮＥＴ的基本功能及其连接方法，同时介绍了ＩＮＴＥＲＮＥＴ的域名管理和ＩＰ地址分配。     

第Ⅳ代DEC网

本校引进的第Ⅳ代DEC网是目前国内功能最完整的一种计算机网络。本文介绍了DEC网为满足各种应用需要可实现的不同配置,并按网络层次介绍了各层工作的机理;着重讨论实现路径选择、流量控制、差错恢复、逻辑链路建立等算法。最后通过分析任务间通信、远程文件访问两种典型功能的实现以说明网络通信软件与VAX/VMS操作系统的接口。     

Research on Fault Tolerant Scheduling Algorithms of Web Cluster Based on Probability

Aiming at the soft real time fault tolerant demand of critical web applications at present, such as E-commerce, a new fault tolerant scheduling algorithm based on probability is proposed. ““““““““Ib achieve fault tolerant scheduling, the primary/slave backup technology is applied on the basis of task‘s self similar accessing characteristics, when the primary task completed successfully, the resources allocated for the slave task are reclaimed, thus advancing system‘s efficiency. Experimental results demonstrate on the premise of satisfying system‘s certain fault tolerant probability, task‘s schedulabilistic probability is improved, especially, the higher task‘s self similar degree is, the more obviously the utilization of system resources is enhanced.     

An Intrusion Alarming System Based on Self-Similarity of Network Traffic

Intrusion detection system can make effective alarm for illegality of network users, which is absolutely necessarily and important to build security environment of communication base service. According to the principle that the number of network traffic can affect the degree of self-similar traffic, the paper investigates the variety of self-similarity resulted from unconventional network traffic. A network traffic model based on normal behaviors of user is proposed and the Hurst parameter of this model can be calculated. By comparing the Hurst parameter of normal traffic and the self-similar parameter, we can judge whether the network is normal or not and alarm in time.     

A Partially Non-Cryptographic Security Routing Protocol in Mobile Ad Hoc Networks

In this paper, we propose a partially non-cryptographic security routing protocol （PNCSR） that protects both routing and data forwarding operations through the same reactive approach. PNCSR only apply public-key cryptographic system in managing token, but it doesn＇t utilize any cryptographic primitives on the routing messages. In PNCSR, each node is fair. Local neighboring nodes collaboratively monitor each other and sustain each other. It also uses a novel credit strategy which additively increases the token lifetime each time a node renews its token. We also analyze the storage, computation, and communication overhead of PNCSR, and provide a simple yet meaningful overhead comparison. Finally, the simulation results show the effectiveness of PNCSR in various situations.     

A Behavior-Based Remote Trust Attestation Model

0 IntroductionDue to the fast development of communication technolo-gies ,the lowered cost of hardware,there is anincreas-ing reliance on computer networks . However ,along with thetremendous convenience provided,there is increasing numberof network based attacks .One particular kind of attacks exploits software vulnera-bilities .It is lunched by a virus or worm.Some examples in-clude earlier worms such as Code Red, Ni mda as well as re-cently high speed worms ,such as Slammer , Witty and F…     

网络环境下的数据库系统设计与实现

为了实现单位各部门的数据共享,提高数据的可用性和使用效率,本文介绍了一种数据库系统互联的方法。本文重点阐述了数据库互联的设计思想及其主要的策略。     

计算机网络教学实验环境存在的问题和改革探讨

针对高等院校计算机网络教育中,网络实验环节应对网络新技术出现问题的现状和特点,结合自己的教学实践,提出提高高等院校计算机网络实验教学环境及实验水平的几点建议和对策。