一个基于FoxPro和Clips的智能数据库支持工具FoxPert

本文介绍了一个数据库系统ＦｏｘＰｒｏ和产生式系统Ｃｌｉｐｓ的集成系统ＦｏｘＰｅｒｔ的设计与实现技术。该系统采用增强接口界面功能和扩展被集成系统各自功能的方法克服松耦合结构的缺陷。ＦｏｘＰｅｒｔ已在不同应用领域取得良好的应用效果。     

基于xampp的linux网络环境的配置

许多人通过他们自己的经验认识到安装Apache服务器是件不容易的事。如果您想添加MySQL、PHP和Perl,那就更难了。XAMPP是一个易于安装且包含MySQL、PHP和Perl的Apache发行版。下面就XAMPP在linux系统下的安装和使用进行探讨。     

基于Clips的嵌入式专家系统开发方法

专家系统程序通常不是独立的,而是嵌入在其他的程序中.介绍了在Windows环境下利用Clips这种功能强大和应用广泛的专家系统开发工具结合VC2005开发基于Clips的具有图形界面的嵌入式专家系统的方法,并且给出了一个简单的专家系统的开发实例.着重于讨论Clips与VC2005的接口设计和具体实现,还介绍了一种算法来实现Clips对中文的支持.     

Perl语言在群机系统中的应用

Perl语言是实用性很强的一门程序设计语言。本文介绍了Perl语言的特点、功能，以及Perl语言的效率问题。另外，还讨论了该语言在群机系统领域，特别是系统管理软件中的重要应用。     

See What You Need: Helping End-users to Build Abstractions

It has been argued that most end-users would not want to write programs, no matter what kind of tools they had to help them. This paper analyzes the reasons for that situation, and addresses them with a new approach to programming. There is a large class of users who are very reluctant to create any kind of abstraction within a computer (they will not create a new directory, let alone a Word macro). But these people do create abstractions in their everyday lives outside the computer. The reason for their computer habits can be explained in terms of a simple investment and risk model. See What You Need (SWYN) is a system intended to deliver the capabilities—not just of Word macros, but of Perl—to end-users. The techniques it adopts are those of programming by example, visual program representation and direct manipulation. SWYN is not intended to be a complete system, and is unlikely to develop into a complete Perl replacement. It is a research vehicle, supporting the evaluation of specific features aimed at reducing the perceived risk of abstraction in programming. This paper describes two elements of the SWYN project, both of them related to the regular expressions that are central to pattern matching in Perl. The first is a prototype system that acquires regular expressions from the type of examples required in direct manipulation of data for programming. The second is an experimental evaluation of alternative notations for visualizing regular expressions. This experiment demonstrated a clear advantage for graphical notations in typical end-user tasks, both over conventional regular expressions, and over a tutorial-style textual notation. The overall effect is a reduction both in programming investment and in perceived risk.     

InterNetNews server: inside an open-source project

What do you get when you give your source code away and encourage programmers around the world to make changes to it? Some Internet software development engineers believe you get a robust system with a large market share and development that is highly responsive to user needs. The team behind the InterNetNews Usenet server package is one such group of believers. INN provides programs to exchange Usenet messages with other servers and to deliver those messages to end users. The Internet Software Consortium oversees the INN and has been supporting its development under an open model. INN is a moderate-sized software project with more than 430 files containing nearly 150,000 lines in the uncompiled distribution. Programs are written mainly in C, Bourne shell, and Perl. The CVS revision control system manages all changes to files. The paper describes the logistics of InterNetNews     

Autonomic system design based on the integrated use of SSM and VSM

This paper describes an approach to autonomic systems development that involves the integrated use of two general systems design techniques: Soft Systems Methodology (SSM) and the Viable System Model (VSM). The paper summarizes the relevant aspects of each technique and describes how they can be used together to create design models of an autonomic system and its environment. The discussion is illustrated through a consideration of the development of a generic computing system to help manage the technology used in an organisation.     

基于HTML语言的跨平台界面设计

描述了如何利用HTML超文本标识语言为终端用户创建基于表单的图形化界面。在这里HTML语言仅用于描述用户界面的的外观，程序的编程可以用许多种编程语言或脚本语言。     

Perl扩展到JVM的移植

Perl扩展作为Perl语言与其他语言的接口，使得Perl能够解决更加复杂的问题。该文从Perl扩展的创建入手，深入分析了Perl解释器的动态链接技术以及Perl扩展的工作原理。然后分析了Perl扩展到Java虚拟机移植的可行性和难点，最后给出了移植的几个实现方案及其评估。     

构建集成的Linux内核防火墙

首先介绍了基于最新Linux内核的防火墙技术netfilter框架结构，包括包过滤防火墙、代理服务器、完全状态检测技术、NAT、DMZ的概念、原理和用途，以及在Linux中具体实现的方法。着重探讨了一个用Perl／CGI编写的集成的WebAdmin来构建一个集成的带有状态检测功能的防火墙系统，该系统可以通过WebAdmin管理界面来进行本地／远程配置管理整个防火墙的策略，并提供了包括对于ADSL服务获得的动态IP地址的支持，DNS代理的集成，日志的记录，连接追踪，并特别集成了一个PPTP PVPN的功能，使得该系统成为一个a11-in-one的防火墙系统。     

大数据量推理专家系统外壳的研究与设计

CLIPS是现今主流的专家系统开发工具,但它不能直接访问外部数据库,而传统数据库又缺乏知识。本文提出将CLIPS与数据库系统Postgres结合,使用知识开发技术来降低存储在CLIPS主存储器内数据量。在此结构中,数据存储于Postgres,两系统的接口负责知识归纳,继而将知识传送到CLIPS的工作存储器进行推理。增加了CLIPS的大数据量推理能力。     

Perl程序设计语言综述

Perl语言是在吸收了众多程序设计语言的长处基础之上发展起来的是一门优秀的程序设计语言,在很多领域都有所应用。论文试图对该语言作一个较为全面的介绍,并期待该语言能在我国的计算机应用领域得到广泛的应用。     

Stakeholder identification in inter-organizational systems: gaining insights for drug use management systems

Inter-organizational systems operate in an area where there are many interested parties. If the views of these interested parties are not explored and taken into consideration before and during the development of an inter-organizational system, it is likely that the implementation of this system will be disappointing. This paper describes one approach to exploring these views through the use of stakeholder analysis. More specifically, it describes how to identify the stakeholders, a process that has been overlooked in the stakeholder analysis and inter-organizational systems literature, and examines the perceptions of a number of stakeholders in the drug use management field in the UK.     

The Imalab method for vision systems

We propose a method of constructing computer vision systems using a workbench based on a rich extensible toolbox and a general-purpose kernel. The toolbox provides access to an open set of libraries; the kernel provides incremental dynamic system construction and interactivity. This method makes it possible to quickly develop and test new algorithms, simplifies the use and reuse of existing program libraries, and allows to construct a variety of systems to meet particular requirements. Major strong points of our approach are: (1) Imalab is a single environment for different types of users who share the same basic code with different interfaces and tools. (2) New library modules are added quickly and easily, including libraries for scientific domains other than vision (e.g., robotics, Bayesian reasoning, automatic learning). (3) Different programming languages - C/C + + and several symbolic languages (Lisp, Prolog, Clips) - are tied together in a single system. We consider this an important advantage for the implementation of cognitive vision functionalities. (4) Automatic program generation simplifies the integration of libraries and makes the multilanguage feature work smoothly. (5) Efficiency: library code runs without overhead. The Imalab system has been in use for several years now, and we have started to distribute it.Published online: 4 November 2004This research is partially funded by the European Commissions IST project DETECT (IST-2001-32157)     

The development of a knowledge-based system for information systems project development consulting

The foundation for a successful software development project is a well-conceived project plan which establishes the overall framework for effective project management. Two major functions of planning an information systems development project are: 1) the selection of an appropriate development strategy; and 2) the assessment of risk associated with the development of the system. This paper describes the development of a knowledge-based expert system to assist in choosing the most appropriate development approach to use when planning an information systems development project and when assessing the risk associated with that project. The knowledge base consists of a set of rules addressing both tasks. Case examples of the use of the expert system are also given.     

A gateway development system

There are an increasing number of local area networks being developed and built for use in a wide range of environments. The underlying communication architecture in the majority of cases is either a broadcasting or ring system. This paper describes a gateway development system which is specifically designed to deal with the interconnection of broadcast and ring systems. The gateway makes use of recently developed microprocessor chips to handle the different requirements of the two networks being connected. In particular, the gateway will be used to link an Ethernet-like system and a Cambridge Ring.