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。
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。
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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