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## A method of attribute reduction for incomplete decision tables

ZHOU Yu-hua1,LI Jing-jie2(1.Department of Mathematics and Computer Science,Xinyang Vocational and Technical College,Xinyang 464000,China;2.School of Mathematics and Information Science,Xinyang Normal University,Xinyang 464000,China)
Rough set theory was a mathematical tool to deal with uncertainty.This paper was devoted to the discussion of attribute reduction for incomplete decision table by using rough set theory.The conception of positive region consistent set for incomplete decision table was proposed based on non-symmetry similarity relation and some sufficient and necessary conditions for an attribute set to be positive region consistent set were given.The discernibility function of positive region reduction was constructed and from which an approach for positive region reduction was provided.
【CateGory Index】： TP301.6
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