摘要
两个域上的覆盖粗糙集模型推广了一般关系下的粗糙集模型,定义了两个域上的覆盖二元关系,给出了最小子覆盖新的描述,进而得到两个域上基于最小子覆盖的粗糙集近似算子;给出了若干性质和定理的证明;通过与两个域上的粗糙集模型进行实例对比得出了两个域上的覆盖粗糙集模型的优点。
Covering rough set model over two different universes extends rough set model in general relation. Covering binary relation on two different universes is defined, which provides a new description of the minimal subcovering. Rough set approximation operators based on minimal subcovering on two different universes are presented. Several important properties and theorems are proposed and proved. An example is illustrated to explain the advantages of the model established in this paper by comparing with rough set model over two different universes.
出处
《计算机工程与应用》
CSCD
2013年第10期132-135,共4页
Computer Engineering and Applications
基金
科技部科技型中小企业技术创新基金项目(No.11C26215305906)
关键词
粗糙集
覆盖粗糙集
最小子覆盖
两个域
rough set
covering rough set
minimal subcovering
two different universes
