针对粗糙集中上、下近似集的求解问题,根据关系的矩阵表示和矩阵运算具有简便直观的特点,提出了一种利用关系矩阵和基本的矩阵运算计算上、下近似的方法,通过理论证明结果显示该方法是可行有效的.%This paper mainly discussed the problem about the calculation of upper and lower approximations in rough set theory. Because a relation could be represented by a matrix and matrix operations were simple and intuitive, proposed a new method about the calculation of upper and lower approximations based on relation martix and martix operations. The theoretical proof shows that the method is feasible and effective.
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