Analysis of Characteristics of Reducts in Variable Precision Rough Sets
变精度粗糙集模型约简特征分析*

The paper illuminated important differences between classical rough sets and variable precision rough sets.In variable precision rough sets,there is no non-monotonic decreasing characteristics in quality of classification and relative positive-region and bounce phenomena maybe occur,so the process of reduction is not stabile.Though the change of lower approximation also break non-monotonic decreasing principle,bounce phenomena don't occur and stabile process of reduction can be gotten.The equivalence among quality of classification,relative positive-region and lower approximation is not exit in variable precision rough sets,attributes reduction becomes multiform.