Dantzig Wolfe Decomposition
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. COLUMN GENERATION BASED ALGORITHMS FOR THE CAPACITATED MULTI-LAYER NETWORK DESIGN WITH UNSPLITTABLE DEMANDS
ABSTRACT We investigate a variant of the Multi-Layer Network Design problem where minimum cost capacities have to be installed upon a virtual layer in such a way that (i) a set of traffic demands can be routed AND (ii) each capacity (subband) is assigned a route in the physical layer. The traffic demands cannot be splitted along several paths (nor even sever
Pesqui. Oper.. Publicado em: 2017-09
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2. Decomposição de Dantzig-Wolfe e heurística aplicados a problemas de fluxo multiproduto Fuzzy / Decomposition s Dantzig-Wolfe and heuristic applied to fuzzy multicommodity flow problems
Este trabalho apresenta dois métodos baseados no método clássico de decomposição de Dantzig-Wolfe e um método heurístico, os quais resolvem problemas com incertezas nos parâmetros utilizando a teoria dos conjuntos fuzzy. O primeiro aborda incertezas somente nos custos, enquanto que, os outros dois abordam incertezas nos custos e nas restrições. Mé
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2011
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3. Geração de colunas para o problema de dimensionamento de lotes de produção com limitações de capacidade / Column generation heuristics for capacitated lotsizing problem
The Capacitated Lot Sizing Problem (CLSP) consists in determining a production plan such that all demands are met and the total costs of production, inventory and setup are minimized. Since the problem to find a feasible solution to the CLSP with setup times is NP-complete, large problem instances have been solved by heuristic methods. In this dissertation,
Publicado em: 2009
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4. Crop rotation Scheduling - modeling and solution methodolies / Programação de rotação de culturas - modelos e métodos de solução
Over the last decades, various proposals for techniques and processes to increase agricultural sustainability have been put forward. These proposals bring new planning models in which technical and ecological production aspects must be considered, as well as the access of small farmers to the consumer market. In this type of agricultural production planning,
Publicado em: 2009
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5. Relaxação langrangena com divisão em clusters para alguns problemas de otimização modelados em grafos de conflitos / Lagrangean relaxation with clusters for some optimization problems modeled by conflict graphs
Several combinatorial optimization problems can be modeled by a special graph denoted conflict graph. When these graphs are sparses well-adapted for a previous clustering phase, i.e, when they have clusters of vertices, the edges inter clusters can be relaxed in a lagrangean fashion, and the relaxed problem can be decomposed into sub problems and solved. Thi
Publicado em: 2007
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6. Planejamento de produção da manufatura : analise de desempenho de algoritmos em ambiente paralelizado
In a production planning problem, for a multistage multiperiod multiproduct manufacturing environment with deterministic demand, the determination of a decision set that avoid backorder satisfacting system constraints is a crucial problem. In this work, the special block-angular structure of the problem is explored using the Dantzig- Wolfe decomposition meth
Publicado em: 2000