DECEA - Departamento de Ciências Exatas e Aplicadas
URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/551
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Resultados da Pesquisa
Item Branch-and-cut and GRASP with hybrid local search for the multi-level capacitated minimum spanning tree problem.(2009) Uchoa, Eduardo; Toffolo, Túlio Ângelo Machado; Souza, Maurício Cardoso de; Martins, Alexandre XavierWe propose efficient algorithms to compute tight lower bounds and high quality upper bounds for the Multi-Level Capacitated Minimum Spanning Tree problem. We first develop a branch-and-cut algorithm for the problem. This algorithm is able to solve instances of medium size and to provide tight lower bounds for larger ones. We then use the branch-and-cut within GRASP to evaluate subproblems during the search. The computational experiments conducted have improved best known lower and upper bounds on benchmark instances