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Environmental indices (EI) are used as a communication tool to describe overall status of the environmental systems. Due to the uncertainty in the process of determination of EI, a fuzzy evidential method is proposed in this paper. First, the data collected from different sources are modeled as fuzzy numbers. Second, a method to transform fuzzy variables into basic probability assignments is developed...
Since subjectivity of opinions can be more effectively manipulated in the framework of fuzzy set theory, it is promising way to aggregate experts' judgments using fuzzy set theory. In this short paper, a simple method to aggregate experts' opinions is proposed. In our method, the multiplication operation on fuzzy numbers based on graded mean integration representation is used to simple the aggregation...
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