关键词: 粗糙集 二进制差别矩阵 核 修正

Abstract:

This paper makes a deep study of the core in the binary discernibility matrix, proposes and provesthe key to computing the core in the binary discernibility matrix. Besides,a new core computing method based on the improved binary discernibility matrix is presented. The method is suitable for any decision tables （consistent and inconsistent decision tables） ,and a theoretical analysis shows the method is effective

Key words: （rough set, binary discernibility matrix, core, improvement）