面向对象数据库系统中的DS-粗糙集及其应用  

DS-ROUGH SET IN OBJECT-ORIENTED DATA BASE SYSTEM AND ITS APPLICATION

作　　者：刘凤春[1] 张春英[1] 朱晓亮[2] 

机构地区：[1]河北理工大学理学院,河北唐山063009 [2]河北理工大学现代技术教育中心,河北唐山063009

出　　处：《计算机应用与软件》2010年第4期38-39,67,共3页Computer Applications and Software

基　　金：国家自然科学基金项目(60673136)

摘　　要：在面向对象数据库中,将属性和方法封装在一起形成类,类的实例构成对象。对象在方法的作用下,其属性值不断地发生变化,使得对象迁入或迁出集合,则研究的对象集合成为双向DS-集合。分析类与对象中的S-粗集特征,定义了基于动态特征的面向对象DS-粗集。DS-粗集具有类的封装性和隐蔽性特征,DS-粗集是S-粗集和粗集的一般形式,是S-粗集和粗集的进一步推广。最后通过一个简单实例说明了DS-粗集在面向对象数据库系统中的应用基础。In Object-Oriented Data Base（OODB） ,attributes and methods are encapsulated together to form the class,and the instances of the class form the object. Affected by the methods,attribute values of the object are changing constantly,which makes the objects settle in or move out of the sets,thus the object sets being studied become bidirectional DS-sets. By analysing the characteristics of the class and the S-rough set,the object-oriented DS-rough set based on dynamic characteristic is defined. DS-rough set has the characteristics of encapsulation and concealment as the class,and it is the general form of S-rough set and rough set as well as their further expansion. At the end of the pa-per,the applicative foundation of DS-rough set in object-oriented data base has been explained by a simple example.

关 键 词：类与对象 S-粗集 DS-粗集 封装性 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]