基于变精度粗糙集的不完备决策表属性约简

摘要

In view of the limitations of the attribute reduction algorithm based on variable precision rough set in tolerance rela-tion, the judgment theorems and discernibility matrixes with respect to β upper(lower)distribution reductions are presented.The method for β upper(lower)distribution reduction in incomplete decision table is also presented. At last, the experiment demonstrates the effectiveness of the proposed method.%针对现有的在相容关系下基于变精度粗糙集约简算法的局限，给出了β上（下）分布约简的判定方法和改进的β上（下）分布可辨识矩阵定义，并给出求解基于变精度粗糙集的不完备决策表约简算法；最后通过实例验证了算法的有效性。