软件开发复用技术在SCOU NIX环境开发中的应用

本文主要讨论了在UNIX环境下开发应用软件时,如何使用软件开发复用技术减少重复开发、提高开发效率,借此来解决软件开发劳动重复浪费的问题。     

基于Unix实现的类OLE组件技术及其在电网调度自动化系统中的应用

组件技术已引起软件开发模式的巨大变革，它也必将促进电网调度自动化平台软件的进步。由于在Unix平台上还没有类似于OLE能支持图形对象的组件技术，作者在Unix平台上利用C 将Motif/Xt封装成面向对象的Motif开发包，据此实现了类似OLE的技术，并将该技术应用于电网调度自动化系统中，开发了新型电网调度自动化支撑平台。     

企业免费实现ORACLE Web方式信息发布的技术方法

利用GNU免费的ApacheWebServer1.3.27版本软件提供www服务,采用GCC编译标准C程序,运用OCI接口,通过CGI方式,在Oracle8iForSolaris2.7工作站环境下访问后台数据库,以B/S(浏览器/服务器)方式,动态发布企业生产和管理信息,量化实现企业管理业务规则。     

Planning Intelligent Responses in a Natural Language System

Intelligent help systems cannot merely respond passively to the user'scommands and queries. They need to be able to volunteer information,correct user misconceptions, and reject unethical requests when appropriate.In order to do these things, a system must be designed as an intelligentagent. That is, a system needs to have its own goals and then plan forthese goals. A system which did not have its own goals would never refuseto help users perform unethical actions.Such an intelligent agent has been implemented in the UCEgo component of UC(Wilensky et al. 1984; Wilensky et al. 1988) (UNIX Consultant), a natural languagesystem that helps the user solve problems in using the UNIX operatingsystem. UCEgo provides UC with its own goals and plans. By adoptingdifferent goals in different situations, UCEgo creates and executesdifferent plans, enabling it to interact appropriately with the user.UCEgo adopts goals when it notices that the user either lacks necessaryknowledge, or has incorrect beliefs. In these cases, UCEgo plans tovolunteer information or correct the user's misconception as appropriate.These plans are pre-stored skeletal plans that are indexed under the types ofsituations in which they are typically useful. Plan suggestion situationsinclude the goal which the plan is used to achieve, the preconditions of theplan, and appropriateness conditions for the plan. Indexing plans bysituations improves efficiency and allows UC to respond appropriately to theuser in real time.Detecting situations in which a plan should be suggested or a goal adoptedis implemented using if-detected daemons. These daemons provide asingle mechanism which can be used both for detecting goals and suggestingplans. Different methodologies for the efficient implementation ofif-detected daemons are discussed.     

Internet网络层安全协议理论研究与实现

本文研究了Ｉｎｔｅｒｎｅｔ网络层ＩＰ安全协议亟待解决的理论和技术问题,提出一种适合于非连接ＩＰ数据加密业务密码同步的滑动窗口机制,从理论上描述了安全协议的运行状态,并对安全协议进行了扩展。针对非连接ＩＰ的特点以及目前ｓｅｓｓｉｏｎｌｅｓｓＳＫＩＰ密钥管理的弱点,本文给出了无会话密钥管理的定义,提出了一种基于椭圆曲线理论的非会话密钥管理方案,该方案与传统主案相比可减少密钥长度,提高安全性能,同时有     

基于STREAMS机制的UNIX内核网络协议软件开发

ＳＴＲＥＡＭＳ机制是ＵＮＩＸ提供的一种开发工具,本文在对ＳＴＲＥＡＭＳ机制进行介绍和分析的基础上,提出了基于ＳＴＲＥＡＭＳ机制的开发ＵＮＩＸ内核网络协议软件的通用抽象模型。     

UNIX访问控制机制的设计与实现

本文描述在UNIX操作系统安全改造中增加基于访问控制表(ACL)的自主访问控制机制和强制访问控制机制的设计与实现方法。     

针对不同平台获取MAC地址的特定方法

文章提出了在不同操作系统以及不同平台上获取MAC地址的方法。以目前比较典型的两种操作系统:UNIX操作系统和WINDOWS操作系统为例,阐述了具体方法,并给出了相应的C/C++语言读取MAC地址的实现程序。     

The pulse distributed file system

A network of powerful personal computers, linked by a high-speed local area network, is being seen increasingly as an alternative to a traditional centralized time-sharing operating system. The PULSE project is investigating how such a system may be constructed to give the benefits of a self-sufficient personal computer to each user without losing the facilities for communication and sharing of data inherent in centralized systems. In particular, a distributed file system has been built which provides a single global UNIX

1 UNIX is a trademark of Bell Laboratories.

-like hierarchy, with a consistent appearance when accessed from any machine. Replicated copies of files are maintained to improve reliability, increase performance, and enable each machine to run stand-alone, albeit with reduced facilities.     

Experiences with the UNIX time-sharing system

The UNIX

1 UNIX is a trademark of Bell Laboratories.

Time-sharing System has been in use at the University of New South Wales since 1975, and favourable experience has led to its widespread adoption on campus for both teaching and research. It has proved very adaptable to the university's needs, and very usable in a situation where staffing levels are critically low. One important application area, the teaching of Computer Science, is now firmly based upon the use of the UNIX system.