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基于依赖空间的变精度粗糙集属性约简*

, PP. 1065-1070

Keywords: 变精度粗糙集,属性约简,二元关系,依赖空间

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Abstract:

针对求解变精度粗糙集模型属性约简问题,在对象集上定义一种上下近似二元关系.利用此关系建立属性集上的等价关系,由此构造出依赖空间,从而得到变精度粗糙集的上下近似协调集的判定定理.同时建立一种保持每个决策类的上下近似不变的属性约简方法.最后通过实例验证方法的有效性.

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