Research on Covering-based Variable Precision Rough Interval-valued Intuitionistic Fuzzy Set Models
The basic theory of interval-valued intuitionistic fuzzy sets is summarized.Four models of variable precision rough interval-valued intuitionistic fuzzy sets based on covering are established by using the defined average membership degree and average non-membership degree.Some related properties of these four models,the relationship with the existing models and the relationship between the four models are discussed.Finally,the four models are analyzed by examples.
coveragevariable precisionaverage membership degreeaverage non-membership degreeinterval-valued intuitionistic fuzzy set