this paper presents a hybrid method for the optimization of forging process of an aerofoil blade. preform shape and die parting-line angle are optimized in order to minimize the volume of the unfilled die cavity, material waste, forging forces. the overall optimization scheme used in this research work includes a multi-objective approach that is combination of response surface and finite elemen...

arguably, the natural gas transmission pipeline infrastructure in iran represents one of the largest andmost complex mechanical systems in the world. the optimization of large gas trunk lines known asigat results in reduced fuel consumption or higher capability and improves pipeline operation. in thecurrent study, a single-objective optimization was conducted for khormoj compressor station on t...

In this paper, a new hybrid conjugate gradient algorithm is proposed for solving unconstrained optimization problems. This new method can generate sufficient descent directions unrelated to any line search. Moreover, the global convergence of the proposed method is proved under the Wolfe line search. Numerical experiments are also presented to show the efficiency of the proposed algorithm, espe...

We consider the problem faced by a retail chain that must select what mutual-substitute items to display in each one of its stores maximize revenues. The number cannot exceed limit space capacity store. Customers purchase product maximizes their utility, which depends on price, travel cost store, and reservation known retailer. retailer can set different price markdowns at products. considers d...

The line sum optimization problem asks for a ( 0 , 1 ) -matrix minimizing the of given functions evaluated at its row and column sums. We show that uniform problem, with identical functions, monotone over matrices nonincreasing sums, are polynomial time solvable.