Computer Science ›› 2015, Vol. 42 ›› Issue (6): 97-100.doi: 10.11896/j.issn.1002-137X.2015.06.022

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Two Similarity Measures between Rough Sets

LIN Juan, MI Ju-sheng and XIE Bin   

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

Abstract: Rough set theory is emerging as a powerful tool for dealing with vagueness and uncertainty of knowledge.First of all,one method of measuring the similarity between two rough sets was proposed in approximate space based on approximation sets.And then an inclusion degree was defined based on rough membership function,which was used to define another similarity measure between two rough sets.The properties of the two similarity measures were studied respectively.Finally,the relationship between the two similarity measures was also discussed.

Key words: Rough set,Lower and upper approximation,Inclusion degree,Similarity measure

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