Firstly, analysizing the structural characteristics and the shortage of traditional evaluation methods, we produced the fuzzy reasoning methods, given the basic model of this method and introduced seven kinds of Mamdani algorithm. Secondly, combining fuzzy integrated evaluation with the fuzzy inference, we produced the improved weighted multi-input fuzzy reference algorithm. Thirdly, the engineering example was given. The result shown: this method is not only overcome the deficiencies of traditional method cannot consider the relative importance of multi-input, but also overcome the deficiencies of the fuzzy comprehensive evaluation can not deal directly with linguistic variables and experts evaluation strategy. This method can meet the needs of the multi-level, multi-performance structural form selection; the evaluation results are intuitive, effective, and take full advantage of it in accumulated experience and strategy.
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