Hassan Mishmast Nehi

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The quadratic assignment problem (QAP) belongs to the class of NP-Hard problems and also is one of the hardest problems in this class. Today, regarding current hardware, solving the large size instances of this problem, using exact methods, is not possible in reasonable amount of time. In this way many heuristic (Meta-heuristic) and approximation methods(More)
In this paper first, we find a canonical symmetrical trapezoidal(triangular) for the solution of the fuzzy linear system Ax̃ = b̃, where the elements in A and b̃ are crisp and arbitrary fuzzy numbers, respectively. Then, a model for fuzzy linear programming problem with fuzzy variables (FLPFV), in which, the right hand side of constraints are arbitrary(More)
TOPSIS method is a most useful tool for solving MADM problems, also, Choquet integral method is another powerful method which, is able to manage interaction criteria. In this paper, we combine both methods to use from their benefits. First, we will introduce a new method for computing the distance between IT2FSs. Then, we proposed a hybrid method based on(More)
In this paper, we review previous methods for solving interval linear programming (ILP) problems. In most of these methods such as BWC, ILP, TSM, and SOM-2 methods, part of solution space is absolutely infeasible and non-optimal. To eliminate infeasible part of solution space, several methods such as MILP, and ITSM are proposed. The solution space of these(More)
In this paper, effort has been made to solve the fuzzy fractional bilevel linear programming (FFBLP) problem with fuzzy parameters in the objective functions and constraints. These are among the problems that have been popular with only a few researchers in the recent years. We will first review the related literature and then study the solution procedures(More)
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