The overall objective is to minimize the total weighted tardiness of the set of jobs related Yves Saint Laurent Shoes these tasks. A mixed integer formulation is decomposed into two levels: the upper level master problem of task assignment and scheduling; and the lower Jimmy choo lance mirrored black sandals routing subproblem. The master problem is solved by using Lagrangian relaxation and a lower bound is obtained. Either the solution turns out to be feasible for the lower level or a feasible solution for the problem is constructed, and an upper bound is obtained. If the convergence is not satisfied, cuts are generated to exclude previous feasible solutions Jimmy choo lance mirrored sandals solving the master problem again. Two types of cuts are proposed to reduce the duality gap. The effectiveness of the proposed method is investigated from computational experiments. This paper presents a new algorithm for derivative-free optimization of expensive black-box objective functions subject Jimmy Choo Mesh pumps black expensive black-box inequality constraints.
Commentaires
Il n'y a aucun commentaire sur cet article.