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《第30届中国控制与决策会议论文集(1)》2018年
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An Attribute Reduction Method Based On Three-Way Decisions Model for Decision Tables

Linzi Yin  Xuemei Xu  Jiafeng Ding  Zhaohui Jiang  Kehui Sun  
【摘要】:In this paper,an attribute reduction method is proposed based on the model of three-way decisions for decision tables(3 WD-D).First,the discernibility relations among regions are analyzed based on the component of trisecting in 3 WD-D model,and the discernibility relations among the granules in the same regions are discussed based on the other component of acting.On the basis,three discernibility matrices are presented to describe these discernibility relations and calculate the significances of attributes.Next,a heuristic attribute reduction algorithm based on discernibility matrix is proposed for finding a single reduct.Besides,the differences and relationships between 3 WD-D and rough set are analyzed in terms of discernibility matrices,reducts and types of rule set.These theoretical analysis and experimental results show the effectiveness and advantages of the proposed attribute reduction method.

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