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Date of Publication:2008-01-01

Journal:大连理工大学学报

Affiliation of Author(s):建设工程学部

Issue:1

Page Number:124-129

ISSN No.:1000-8608

Abstract:The choice of normalization formulae and the ideal and non-ideal plans is a key topic in the fuzzy optimization methodology which affects the evaluation results obviously. Dispersal indexes of characteristic values and weights are established as the approximate choice criterions based on the analysis of previous methods. Normalization formulae and the ideal and non-ideal plans are analyzed and applied to real cases. The results show that the evaluation results of relative ideal and non-ideal plans are more dispersed than those of absolute plans whereas their evaluation orders are consistent. While the alternatives characteristic values are dispersed obviously, the two plans are both feasible. When alternatives characteristic values are contiguous, the absolute plans are more appropriate than the relative ones, but the relative ones can be used for a reference. The normalization formulae can be recognized according to the values of dispersal indexes under different plans.

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