Range reduct based on variable precision rough set model;

变精度粗集模型是一种有参数的粗集扩充模型。

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To consistent decision tables, the minimal reduct has been proved to be NP-hard.

最优属性约简是NP困难问题，目前出现的启发式算法多是以决策表的核为起点。

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Then we give out the algorithms for extracting association rules from the lattice based on intent reduct, where two properties are exploited to remove the redundant rules.

然后基于内涵缩减，我们给出了从格上提取关联规则的算法伪码，两个性质被用来去除冗余的关联规则；

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Then we give out the algorithms for extracting association rules from the lattice based on intent reduct, where two properties are exploited to remove the redundant rules.

然后基于内涵缩减，我们给出了从格上提取关联规则的算法伪码，两个性质被用来去除冗余的关联规则；

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