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A solid transportation problem with type-2 fuzzy variables
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DOI：10.1016/j.asoc.2014.08.005.png)
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Abstract
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This paper focuses on generating the optimal solutions of the solid transportation problem under fuzzy environment, in which the supply capacities, demands and transportation capacities are supposed to be type-2 fuzzy variables due to the instinctive imprecision. In order to model the problem within the framework of the credibility optimization, three types of new defuzzification criteria, i. e., optimistic value criterion, pessimistic value criterion and expected value criterion, are proposed for type-2 fuzzy variables. Then, the multi-fold fuzzy solid transportation problem is reformulated as the chance-constrained programming model with the least expected transportation cost. To solve the model, fuzzy simulation based tabu search algorithm is designed to seek approximate optimal solutions. Numerical experiments are implemented to illustrate the application and effectiveness of the proposed approaches. (C) 2014 Elsevier B. V. All rights reserved.
Keywords:
Fuzzy sets
Fuzzy possibility space
Type2 fuzzy variable
Solid transportation problem
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