集值信息系统的粗糙集扩展模型

摘要

通过分析研究现有集值信息系统下定义的二元关系,基于集合包含度在集值信息系统中引入相似度概念,定义了一种基于相似度的α-相容关系,提出基于α-相容关系的粗糙集扩展模型,并分析比较了该模型与现有粗糙集扩展模型之间的关系.最后,给出实例加以验证.%Kinds of relations in the classical set-valued information systems are analyzed.Based on set inclusion degree, the concept of tolerance degree is introduced in set-valued information systems,and then a tolerance relation based on tolerance degree is defined. An extension model of rough set based on α -tolerance relation is proposed, then the relations between this extension model and classical models are compared.Finally,an illustrative example is analyzed.