基于对象请求代理的程序自动开发方法与工具

随着分布式对象技术的日益流行,越来越多的应用程序开始采用基于对象请求代理(object request broker,简称ORB)进行开发.从开发人员角度看,目前这类应用程序在开发过程上仍存在一些不足之处,例如,需要掌握的基本概念较多,ORB产品之间的兼容性不足等.在深入分析了这些问题后,提出了一种改进开发过程的方法,通过代码自动生成,分离特定于ORB产品的代码等技术,尽可能提供对其中开发活动的自动支持.实验结果表明,实现上述方法的支撑工具原型系统可以有效地减少代码编写量,并降低编码出错的概率.     

Tool Modeling with Fujaba

This paper is a small tutorial on tool building with Fujaba. With the help of a small case study, we exemplify how the different requirements of an environment for a visual language may be addressed using Fujaba graph transformations. This covers abstract and concrete syntax, static and operational semantics, and model transformations. This case study shows, how the more sophisticated language elements of Fujaba may be exploited in modeling complex aspects of the desired CASE tool. In addition, we address some not graph grammar related aspects in building such an environment, e.g. the graphical user interface and multi-user support.     

Can the case for CASE technology be advanced by Process Improvement?

Findings of a case study that focused on understanding how software development proceeded in a small Information Systems Department (ISD) located within a major public sector service are presented. The observations collected relate to a period prior to, during and after the introduction of a CASE (Computer Aided Software Engineering) tool. They are based on a combination of minutes from quality circle meetings, interviews and regular on-site observations by the first author. The study used a framework loosely based on SEI's CMM model to characterize the state of practice before and after the introduction of the tool and to assess process improvement.Prior to the introduction of the first CASE tool a typical ISD software development task was a standalone single reporting application. The software development process model consisted simply of requirements acquisition and program development. Both these activities for a particular application were carried out by an individual developer within a few months. The former activity involved the client/user, with the level of participation dependent on the developer. Similarly, program development varied from one developer to another, with most effort being expended on coding and testing. Not surprisingly, maintenance was locked to the original developer.A decision that ISD should develop larger and more complex applications triggered the purchase of a CASE tool. Typically, the larger applications would be developed by a team of about five people over a period of twelve or more months. The introduction of CASE tools, first Case Designer 5.1 then Designer 2000, had a marked effect on the working practices of ISD. Specifically two more stages were introduced into the development activity: designing via an entity-attribute relationship model and validation via rapid prototyping; and greater attention was paid to the management of testing and fault reporting.The paper explores whether the benefits accrued by ISD can be attributed to the CASE tool, the changes in work practices, or a combination of both.     

一种基于遗传算法的软件项目计划制定系统

软件管理中一个重要的问题是制定软件开发计划。本文针对软件项目计划制定的一系列问题,设计并开发了一套基于遗传算法的软件项目计划制定系统,该系统能同MSProject无缝集成,在实际使用中,收到了显著的效果。     

数据库和数据仓库建模与建模CASE工具的设计实现

本文讨论了数据库和数据仓库的建模技术,数据库与数据仓库的关系以及数据仓库的数据库设计,介绍了一个可用于数据库和数据仓库的ＣＡＳＥ工具设计与实现。     

CASE工具国外使用问题及我们应采取的相应对策

本文针对国外在使用计算机辅助软件工程(CASE)工具时存在的CASE无用现象原因的分析,结合我国的具体情况,提出了一些相应的对策以将CASE工具在我国软件行业应用时的问题减少到最小。     

基于B/S模式的学位论文管理系统的设计与实现

在论述西昌学院学位论文管理系统需求的基础上,重点阐述系统的设计、开发过程和实现技术。同时介绍.NET中的三层架构以及Ajax技术在系统实现中的应用。     

CASE法及其应用中若干问题的讨论

CASE法是一种简单近似地确定单桩承载力和判断桩身质量的桩基检测技术，但由于CASE法本身理论上存在一定缺陷性，使其在实际应用中往往理论计算与实际不相符，桩基工程界对CASE法一直褒贬不一。文中简单介绍了CASE法的基本原理，并从辨证的观点和实事求是的态度出发，讨论了CASE法理论的缺陷性、应用的局限性、数据采集处理等问题，并对它的应用领域和应用价值进行了评价。     

通用信息发布系统的数据库建模

介绍了通用信息发布系统的特殊要求，数据库的需求分析和逻辑建模，以及UML和ERA模型在建模中的应用。在建模过程中，应用了数据库规范化理论，减少了冗余数据，提高了系统的可维护性。简要说明了建立在数据库建模基础上的系统实现。     

CASE法的实质及承载力低估的原因探析

ＣＡＳＥ法自称是波动方程的闭合解,但由该法确定的单桩极限承载力要比静载试验结果偏低很多。本文依据波动理论,对该方法的假设是否合理,公式能否成立,承载力低估的原因,以及该方法如何加以改进等问题,进行了探析。