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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Vague set, as a generalized fuzzy set, has more powerful ability to process fuzzy information than fuzzy set. In this paper, we propose a new similarity measure between vague sets based on the set-theoretic approach. The proposed measure can provide a useful way for measuring the degree of similarity between vague sets.