面向虚拟企业的管理信息系统的研究

在分析虚拟企业特点的基础上，提出了一种面向虚拟企业的新型管理信息，并对其逻辑模型以及支撑技术Ｉｎｔｅｒｎｅｔ／Ｉｎｔｒａｎｅｔ／Ｅｘｔｒａｎｅｔ、面向对象技术、系统安全等进行了研究。     

Replicated Case Studies for Investigating Quality Factors in Object-Oriented Designs

Thispaper aims at empirically exploring the relationships betweenmost of the existing design coupling, cohesion, and inheritancemeasures for object-oriented (OO) systems, and the fault-pronenessof OO system classes. The underlying goal of this study is tobetter understand the relationship between existing design measurementin OO systems and the quality of the software developed. in addition,we aim at assessing whether such relationships, once modeled,can be used to effectively drive and focus inspections or testing.The study described here is a replication of an analogous studyconducted in a university environment with systems developedby students. In order to draw more general conclusions and to(dis)confirm the results obtained there, we now replicated thestudy using data collected on an industrial system developedby professionals. Results show that many of our findings areconsistent across systems, despite the very disparate natureof the systems under study. Some of the strong dimensions capturedby the measures in each data set are visible in both the universityand industrial case study. For example, the frequency of methodinvocations appears to be the main driving factor of fault-pronenessin all systems. However, there are also differences across studies,which illustrate the fact that, although many principles andtechniques can be reused, quality does not follow universal lawsand quality models must be developed locally, wherever needed.     

SUB-OPTIMAL MASK SEARCH IN SAPS

Abstract

In this paper, a new and very simple algorithm for mask search in SAPS (System Approach Problem Solver) is introduced to illustrate a sub-optimal approach. It is intended to be used as an alternative of the optimal mask optimization present in previous versions of SAPS.

The algorithm described in this paper illustrates the general use of non-optimal search strategies. It is based on the hill-climbing strategy and as such it is not exponential as in all known previous versions of SAPS, but polynomial in nature. This results in an improved executing speed; very complex systems that were intractable with previous versions of SAPS can be handled with additional flexibility. The previous (exponential) algorithm is also implemented. Hence, comparisons and benchmarks are possible because of the same object-oriented environment. The main focus in this paper will lie on the justification for sub-optimal mask search techniques and its illustration with the algorithm     

一种新的面向对象概念格属性约简方法

为了研究概念格的属性约简方法，提出了面向对象概念格的可简化属性和不可简化属性，并研究相关性质。给出了面向对象概念格知识约简的判定定理，及相应的面向对象概念格约简方法。本文提出的属性约简方法，不用建立在差别矩阵上面，便可得到形式背景的约简集。     

组件技术在电力系统中的应用

面向对象代码重用由于其固有的局限性 ,未能根本上解决电力系统应用软件重复开发和维护困难等问题。介绍了组件软件技术的基本思想及其代码重用的优越性和构建大型应用的灵活性 ,并编制了故障计算实用组件。组件对象模型是电力系统应用软件的标准化方向。IEC(国际电工委员会 ) 6 1970系列标准及CIM (公共信息模型 )CIS(组件接口规范 )以组件对象模型为基础 ,将EMS应用程序的研制规范化。     

继电保护专家系统中知识的面向对象表示法

比较了几种常用知识表示方法的优缺点 ,论述了面向对象知识表示法是非常适合于电力系统的先进的知识表示法 ,提出了一种将知识库和推理机相分离的新型面向对象知识表示法。结合一个实际的继电保护运行管理专家系统的研究开发 ,全面说明了该表示法中封装、继承、多态、消息发送、规则推理等技术的应用。     

一种面向对象的变电站自动化系统的设计及实施

介绍了一种分散分布式的变电站自动化系统 ,基于面向电力系统对象的设计原则和方法以及采用标准的高可靠性、高效率的以太网通信网络 ,系统可组成多种灵活的网架结构并可适用于从 35kV、10kV低压配电站一直到 5 0 0kV超高压变电站的不同功能及配置需求。文章最后还提及了变电站自动化系统实施过程中的一些具体问题及意见     

通用智能型电网调度操作票系统

随着电网的发展 ,微机开票在电力系统调度运行中已成为必然。以往开发的不少相关的应用软件在通用性和灵活性方面存在不足 ,无法适应电网的发展。针对这一不足 ,开发了文中所介绍的电网调度操作票系统。分析了系统的功能结构 ,重点说明了如何实现程序的通用性和灵活性。在软件设计方面 ,该系统以Visu alC ++为开发平台 ,采用了面向对象的编程技术 ,通过MFC中的类模板来管理对象指针 ,利用VB控制实现程序的通用性和灵活性     

面向对象的煤矿模糊多媒体数据库

针对煤矿数据库存储媒体形式越来越多、数据库容量越来越大的应用背景,运用面向对象的思想,结合模糊知识技术,对煤矿多媒体数据库的研究意义、数据库的数据模型和系统结构等方面,进行了较为详尽的探讨,建立了新的模型和系统的构架,结果表明,这种新型数据库系统具有更强的多媒体数据管理能力,和真正的系统开放性,最后,提出了此领域的进一步研究方向。     

面向对象程序设计技术探讨

介绍了面向对象程序设计技术的产生和现状 ,提出了面向对象程序设计的一些关键技术 ,给出了面向对象程序设计方法 ,并设计出一个网页