...；集合可辨性；阈值 [gap=965]Key words：variable precision rough set；quality of classification；discernibility of set；threshold value ...
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Both of attribute weight frequency and strong compressible set are used to simplify discernibility matrix so that computing complexity is decreased and reduction efficiency is.
同时利用属性加权频率和强等价集概念化简区分矩阵，既减小了计算复杂度又提高了约简效率。
Both of attribute weight frequency and strong compressible set are used to simplify discernibility matrix so that computing complexity is decreased and reduction efficiency is increased.
同时利用属性加权频率和强等价集概念化简区分矩阵，既减小了计算复杂度又提高了约简效率。
Then we give the judgment theorems and the discernibility matrices of the generalized decision reduction in set-valued decision i…
最后，基于两种关系从集值决策信息系统提取了最优广义决策规则，并进行了讨论。
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