Computer Science ›› 2017, Vol. 44 ›› Issue (5): 206-210, 225.doi: 10.11896/j.issn.1002-137X.2017.05.037

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Rough Set Based on “Conjunctive Logic” Operation of Variable Precision and Grade in Intuitionistic Fuzzy Ordered Information System

HU Meng, LI Meng-meng and XU Wei-hua   

  • Online:2018-11-13 Published:2018-11-13

Abstract: In this paper,the weighted score function of intuitionistic fuzzy information system is defined by the comprehensive consideration of the membership degree,non-membership degree and hesitation degree of the element with respect of the set.Based on the score function,the dominance relation of intuitionistic fuzzy information is defined.Variable precision rough set and graded rough set are combined with “conjunctive logic” mode,and then the definition of the “conjunctive logic” rough set model is constructed and its properties are deeply explored.Finally,the analysis of practical example further reflects the significance of this study,which provides a new theoretical foundation for knowledge representation in ordered information systems.

Key words: Variable precision rough set,Graded rough set,Conjunctive logic,Intuitionistic fuzzy order information system

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