关键词: 粗糙集 上近似集 下近似集 属性核 关键属性

Abstract:

Attribute reduction is considered one of the most important contents of the Rough Set Theory. The problem of calculating the core attributes of a dicision table is studied,an improved binary discernibility and approach to computing the feature core is put forward in this paper,and the correctness of t  his method is proved. This method is suitable for any dicision tables.  A

Key words: rough set, upper approximation set;lower approximation set, feature core, key feature