A Bipolar Type of Cardinal Grey Relational Grade

This study attempts to propose a bipolar version of Wen’s grey relational grade according to our previous work, bipolar grey relational analysis. The proposed approach provides a simple scheme to determine the degree of similarity and corresponding polarity for all comparative sequences with respect to the reference. In addition, this study also proposes and proves four modified axioms for bipolar type of Wen’s grey relational grades. Finally, four examples are given to show the validity of the proposed approach.