Flexible Multi-Attribute Decision Method Based on Fuzzy Set Pair Analysis and its Application

It´s the emphasis and difficulty to understand various uncertain information effectively and depict it exactly in the flexible decision making process. The set pair analysis is a useful approach to analyze and research uncertain system. In this paper, it takes trigonometry fuzzy numbers to describe the identity, discrepancy and contrary degree of the connection numbers, and presents construction method of connection number of the set pairs in the format of trigonometry, and the set pair is composed of the alternatives and ideal schemes in the sense of the relative approach degree. With regard to the decision-maker´s subjective weight, the comprehensive weights of each decision attribute can be calculated using entropy weight method. In the end, the proposed method is applied to the flood control decision making of the Three-George reservoir, which verifies its effectiveness and practicability.