Computer Science ›› 2015, Vol. 42 ›› Issue (8): 240-243.

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Rough Set Model Based on Grade Indiscernibility Relation

QIN Ke-yun and LUO Jun-fang   

  • Online:2018-11-14 Published:2018-11-14

Abstract: The indiscernibility relation is a key notion of rough set theory.We proposed the grade indiscernibility relation for information system to characterize the difference between the grades of discernibility.The rough set model based on grade indiscernibility relation was presented with its basic properties being discussed.Furthermore,the relationship between grade approximation operators and Pawlak approximation operators was analyzed.

Key words: Rough set,Grade indiscernibility relation,Rough approximation operator,Fuzzy relation

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