不完备信息系统下的L_A最大相容类粗糙集模型  

Rough set based on LA maximal compatible classes in incomplete information systems

作　　者：贾凡[1] 薛佩军[1] 

机构地区：[1]山东大学数学学院,济南250100

出　　处：《计算机工程与应用》2012年第28期143-146,200,共5页Computer Engineering and Applications

基　　金：山东省自然科学基金(No.Y2006A12)

摘　　要：目前处理不完备信息系统已经有了容差关系、相似关系等推广的粗糙集模型,以及这两种模型的改进形式。基于限制容差关系,提出了一种新的相容类的概念——LA最大相容类,并建立LA最大相容类粗糙集模型。通过对比分析得出LA最大相容类粗糙集模型可以获得更高的近似精度,并讨论了在此模型下属性的约简问题。Nowadays there exists several extensions for rough set theory to handle incomplete information systems, such as tolerance relation model, similarity relation model and other models derived from the former two. Presented in this paper is an improved rough set based on limited tolerance relation with the concept of a maximal compatible class. The new model, which is called rough set based on LA maximal compatible classes, creates a better approxi- mation accuracy. At last, attributes reduct in this new model is discussed.

关 键 词：不完备信息系统 粗糙集 限制容差关系 最大相容类 属性约简 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]