【摘要】 针对Hu利用差别矩阵求解粗糙集中的核方法的错误,叶东毅提出了新的差别矩阵及其求核方法,但计算代价高。为此,给出了改进的求核算法,并证明了算法的正确性,该算法纠正Hu方法的错误,且可有效地降低计算代价。更多还原

【Abstract】 In order to correct the error of Hu’s method based on discernibility matrix for computing the core of a decision table,Ye Dong-yi proposes new discernibility matrix and the computing of core,but the complexity is too high.Therefore,we present an improved algorithm of computing the core of a decision table,and prove the correctness of algorithm which corrects the error of Hu’s method and reduces the complexity.更多还原