基于ORM的面向对象教学管理综合数据库的设计

随着软件技术的发展,越来越多的系统软件都支持了面向对象,把面向对象的方法引入到数据库的设计中来是一个必然趋势;本文在介绍面向对象数据库和对象关系数据库两种新数据库模型的概念和特点的基础上,详细探讨了应用ORM方法来设计面向对象教学管理综合数据库。     

应用框架法的化工过程系统通用模型

企业领域的面向对象应用框架研究是现代面向对象应用框架技术的重要趋势之一.应用框架可以增强大型应用软件代码的重用性和可扩充性.针对目前化工过程系统软件中存在的问题,采用面向对象应用框架方法,建立起化工过程系统的通用模型.结合使用本模型完成的国家教委项目--化工仿真系统来阐述该模型.     

基于Petri网的工作流模型的研究

介绍了一般Petri网及工作流网的基本定义,在基本的工作流网系统定义的基础上,引入面向对象技术及分层技术,提出了一种面向对象的工作流网的模型,以提高模型的可读性和重用性,实现流程的分层建模,降低建模复杂度.通过一个具体实例阐述了如何建立扩展工作流网模型,并通过简化技术和可达树分析方法,验证了模型的活性.     

嵌入式系统软件体系结构动态建模及应用研究

应用π演算方法,结合Petri网中的面向对象Petri网和时间Petri网,建立了嵌入式系统软件体系结构抽象模型ESAM,研究了ESAM模型的动态演化、一致性和死锁。应用ESAM抽象模型,对车站信号联锁控制器进行了建模与分析。     

一种全文检索试验系统的开发与实现

基于面向对象的程序设计开发技术,建立了系统的用例模型,分析了系统软件体系结构和系统的COM组件功能,并且应用．NET技术开发了系统界面,实现了全文检索的试验系统功能。     

集中式位置融合系统软件体系结构研究

通过对多传感器数据融合系统软件体系结构的研究，提出了一个适用于集中式位置融合系统的软件体系结构。结构采用管道和滤波器模型，利用面向对象技术实现，提高了软件的扩充和再利用能力。     

DSP伺服控制系统软件设计

文章首先介绍了DSP伺服系统软件的模块化设计,改进系统信号流图,将软件模块与信号流图模块对应,以对软件进行增量式搭建;其次介绍了利用面向对象技术设计伺服系统的方法,根据面向对象要求确定对象,再给出关键消息定义,指出伺服系统软件使用面向对象设计时应注意的问题。     

面向对象的专家知识模型

文中用面向对象方法来分析、设计基于规则的专家系统,提出一种新的采用分层递阶结构的专家知识模型,并从结构和功能角度进行详细阐述。     

DSP伺服控制系统软件设计

文章首先介绍了DSP伺服系统软件的模块化设计，改进系统信号流图，将软件模块与信号流图模块对应．以对软件进行增量式搭建；其次介绍了利用面向对象技术设计伺服系统的方法，根据面向对象要求确定对象．再给出关键消息定义，指出伺服系统软件使用面向对象设计时应注意的问题。     

面向对象数据库的查询转换成关系数据库的查询

文章基于从面向对象数据库(OODB)到关系数据库(RDB)的模式转换,提出了一种从面向对象数据库查询到关系数据库查询的转换算法。该算法主要针对关系数据库中不支持的,而面向对象数据库查询中特有的面向对象特征,诸如,类分层结构、类复合分层结构和集合属性,以及考虑由传统的关系运算来实现它们的语义的一般方法。这项研究的结果可以用于将关系数据库管理系统(RDBMS)升级为面向对象数据库管理系统(OODBMS),也可以用于面向对象数据库和关系数据库之间的互操作。     

对象式软件需求模型及其机器支撑

为了研究需求级软件自动化技术,研制对象式软件需求分析支撑系统的需要,文章提出了一个层次化对象式软件需求模型NDHORM(Nanjing daxue hierarchical object-oriented requirements modelling),它主要包括对象关系模型、类关系模型和类字典3个组成部分.文章基于对对象式需求模型的简要讨论,详细介绍了NDHORM模型的组成、层次结构及对象精化,给出了NDHORM的构模过程,最后简要介绍了NDHORM模型的机器支撑系统.     

Object-oriented design of telecommunication software

A real-time object-oriented method, ROOD, that is specially designed to handle the complexity inherent in telecommunication systems is discussed. ROOD comprises an extended object-oriented modeling technique, called multiview modeling and a hierarchical system model, both tailored to the special needs of large real-time systems, especially telecommunication systems. The application of ROOD to the design of radio-controller software for a cellular phone system is described     

面向领域的数据挖掘系统研究*

通过将领域工程、领域框架、面向对象技术、软件构件技术及数据挖掘相结合,提出了一套面向领域的数据挖掘系统开发模型及一个类似于OSI网络参考模型的新型挖掘层次结构,并且设计了一个面向领域的数据挖掘系统框架,有效地解决了以上问题。     

An object-oriented database management system for computer-aided design of tall buildings

An effective database and database management system is the key to the success of an integrated approach to software engineering applications in general, and Computer-Aided Design (CAD) for structural applications in particular. Due to the inherent nature of CAD data such as dynamic modeling, a wide range of data types, large data volume, etc., the traditional database models, such as hierarchical, network and relational models, are unable to handle the aforementioned applications satisfactorily. An object-oriented data modeling is known to be the most effective approach. However, many of the commercial object-oriented databases are designed for information management, and they are inadequate for CAD application due to the different features of the object-hierarchy and varying data management objectives during the design cycles. This paper presents a hierarchical index-based object-oriented database management model for CAD applications. To deal with the object hierarchy encountered in CAD for the design of tall buildings, the proposed database consists of several salient features: a hierarchical object model, its related storage structure, a data dictionary, a class factory and an index system. The proposed database management model has been implemented into an integrated CAD system for design application of tall buildings.     

基于PDA的生猪溯源管理系统对象模型设计

采用面向对象的软件工程方法对基于PDA的生猪溯源管理系统进行建模,通过用例图、类图、协作图和状态图的设计,用统一建模语言UML实现了对系统对象的建模。该面向对象的模型为基于PDA的生猪溯源管理系统的实现提供了稳定性好、可重用性高、适应性强、易于维护的软件蓝图。     

A Model-Based Approach to Object-Oriented Software Metrics

The need to improve software productivity and software quality has put forward the research on software metrics technology and the development of software metrics tool to support related activities.To support object-oriented software metrics practice efectively,a model-absed approach to object-oriented software metrics is proposed in this paper.This approach guides the metrics users to adopt the quality metrics model to measure the object-oriented software products .The development of the model can be achieved by using a top-down approach.This approach explicitly proposes the conception of absolute normalization computation and relative normalization computation for a metrics model.Moreover,a generic software metrics tool-Jade Bird Object-Oriented Metrics Tool(JBOOMT)is designed to implement this approach.The parser-based approach adopted by the tool makes the information of the source program accurate and complete for measurement.It supports various customizable hierarchical metrics models and provides a flexible user interface for users to manipulate the models.It also supports absolute and relative normalization mechanisms in different situations.     

Software modeling and analysis using a hierarchical object-oriented Petri net

Petri net is used widely to analyze and model various systems formally. Recently, many Petri nets mania devote their efforts to enhancing and extending the expressive power of Petri nets. One such effort is to extend Petri nets with object-oriented concepts. An object-oriented paradigm provides excellent concepts to model real-world problems. Object-oriented concepts allow us to build software systems easily, intuitively, and naturally. Although several high-level Petri nets with the concept of objects are suggested, these nets do not fully support the object-oriented concepts. In this paper, we propose a hierarchical object-oriented Petri net (HOONet). The formal syntax and semantics of HOONet are explained in detail. HOONet supports a wide range of object-oriented features including abstract, encapsulated and modularized objects, object interaction by message passing, inheritance, and ploymorphism. HOONet also supports a variety of modeling and analysis mechanisms such as incremental modeling of evolving systems, unfolding the HOONet to lower level Petri net, and incremental reachability analysis for HOONet models. We demonstrate the usefulness of HOONet by applying it to modeling and analysis with an example.     

基于状态的类测试研究

类是面向对象程序语言的基本组成单位,所以类测试是整个面向对象软件测试的关键所在;论文主要针对传统状态测试方法在发现错误机制上存在的不足,研究了一种利用OSD模型的基于状态的类测试方法,提出了利用OSD模型与系统分析设计的状态图模型进行比较的思想;通过比较两个状态图模型中的状态是否一致以及各个状态间的方法转移是否一致,来发现传统状态测试难以发现的错误;实践证明,该方法能够检测出传统的状态测试方法难以检测到的错误。     

软件测试技术中面向对象方法的研究

以软件工程中面向对象软件开发模式为参考,具体阐述了面向对象分析、面向对象设计、面向对象编程的测试注意点和测试过程,并依照传统的单元测试、集成测试、系统测试三个测试步骤,借鉴传统测试方法以及面向对象软件测试层次结构,详细探讨了面向对象单元测试、面向对象集成测试和面向对象系统测试的测试策略,并对相关问题进行了探讨。     

An application of Bayesian network for predicting object-oriented software maintainability

As the number of object-oriented software systems increases, it becomes more important for organizations to maintain those systems effectively. However, currently only a small number of maintainability prediction models are available for object-oriented systems. This paper presents a Bayesian network maintainability prediction model for an object-oriented software system. The model is constructed using object-oriented metric data in Li and Henry's datasets, which were collected from two different object-oriented systems. Prediction accuracy of the model is evaluated and compared with commonly used regression-based models. The results suggest that the Bayesian network model can predict maintainability more accurately than the regression-based models for one system, and almost as accurately as the best regression-based model for the other system.