Hybrid Heuristics
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. A HYBRID HEURISTIC ALGORITHM FOR THE CLUSTERED TRAVELING SALESMAN PROBLEM
ABSTRACT This paper proposes a hybrid heuristic algorithm, based on the metaheuristics Greedy Randomized Adaptive Search Procedure, Iterated Local Search and Variable Neighborhood Descent, to solve the Clustered Traveling Salesman Problem (CTSP). Hybrid Heuristic algorithm uses several variable neighborhood structures combining the intensification (using loc
Pesqui. Oper.. Publicado em: 2016-04
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2. Hybrid GRASP heuristics for the phylogeny problem combining path-relinking and genetic algorithm as an intensification strategy
A phylogeny is a tree that relates taxonomic units based on their similarity over a set of characteristics. The phylogeny problem under the parsimony criterion consists in finding a phylogeny with a minimum number of evolutionary steps. We propose hybrid heuristic methods - based on GRASP, path-relinking and genetic algorithm methodologies - to build a phylo
Prod.. Publicado em: 23/08/2013
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3. Despacho online para o problema dinâmico de roteamento de veículos
The allocation of vehicles for a specific customers demand is subject to a combinatorial explosion of possibilities by the exponential increase of alternatives according to growth of the problem size. When environmental changes are considered, such as the advent of new customers, the Vehicle Routing Problem becomes dynamic and even more complex and unpredict
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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4. A hybrid methodology to solve the container loading problem with weight distribution and cutting problems
Transport of goods has represented an important role in economic development throughout the history and ship containerization brought great advantages. Its invention in mid-1950s brought down the cost of transport and reduced time for loading and unloading cargo. Consequently, it increased efficiency of port working and reduced handling cargo to hours instea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2011
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5. Heurísticas híbridas para o problema de programação de tarefas em máaquinas paralelas não relacionadas com penalidades por antecipação e atraso / Hybrid heuristics for the problem of scheduling tasks on unrelated parallel machines with penalties for earliness and tardiness
O presente trabalho trata o problema de sequenciamento de tarefas em máquinas paralelas não relacionadas. No problema abordado, é considerado tanto o tempo de preparação das máquinas, o qual depende da sequência de produção, quanto o tempo de processamento das tarefas, que dependem das máquinas. Cada tarefa possui uma data de entrega que deve ser c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2011
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6. Abordagens heurísticas para problemas de agrupamentos / Heuristics approaches for clustering problems
The clustering problems arose from the need to group data in order to understand an object or a phenomenon still unknown. Data clustering is based on similarity between objects of a data set, where the most similar objects are in the same group. This work proposes three new heuristics approaches to clustering problems: the \textit{Variable Neighborhood Searc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/02/2011
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7. Heuristics for implementation of a hybrid preconditioner for interior-point methods
This article presents improvements to the hybrid preconditioner previously developed for the solution through the conjugate gradient method of the linear systems which arise from interior-point methods. The hybrid preconditioner consists of combining two preconditioners: controlled Cholesky factorization and the splitting preconditioner used in different pha
Pesquisa Operacional. Publicado em: 2011-12
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8. Uma abordagem multi-agente para competição de agentes negociadores em gerenciamento de cadeias de suprimento. / A multi-agent approach to negotiating agents of competition in supply chain management.
This work aimed to design a computational approach to supply chain management problem in the scenario Trading Agent Competition for Supply Chain (TAC-SCM) when disturbances on manufacturing process are considered. Simulations have shown that the decentralized approach based on smart products is promising in terms of robustness of the system of control and pl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/04/2010
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9. Uma meta-heurística híbrida com busca por agrupamentos aplicada a problemas de otimização combinatória
- This thesis presents a hybrid method, denominated Clustering Search (CS), that consists of detecting dynamically promising regions in the search space based on the frequence that are sampled in these regions the solutions originated from the metaheuristic. A iterative clustering process is executed in ensembling the metaheuristic, grouping the similar solu
Publicado em: 2009
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10. A hybrid heuristic for the multi-plant capacitated lot sizing problem with setup carry-over
This paper addresses the capacitated lot sizing problem (CLSP) with a single stage composed of multiple plants, items and periods with setup carry-over among the periods. The CLSP is well studied and many heuristics have been proposed to solve it. Nevertheless, few researches explored the multi-plant capacitated lot sizing problem (MPCLSP), which means that
Journal of the Brazilian Computer Society. Publicado em: 2008-12
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11. AST Um modelo para automaÃÃo de horÃrios escolares
The work here presented is about a model for automation of school timetable. It is tailored to deal with most of the restrictions found in the Brazilian schools. It also studies the relation between the constraints of the problem and its theoretical complexity. The school timetable problem is NP-complete even in the simplest cases, where the constraints are
Publicado em: 2008
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12. Constructive heuristics methods to minimizing work in process in environment production hybrid flow shop with asymmetric sequence dependent setup times / Métodos heurísticos construtivos para redução do estoque em processo em ambientes de produção flow shop híbridos com tempos de setup dependentes da seqüência
A teoria de programação da produção preocupa-se em fornecer diretrizes e métodos eficientes para a utilização dos recursos nas atividades produtivas. Este trabalho investiga o problema de programação da produção em ambientes flow shop com máquinas múltiplas e tempos de preparação das máquinas assimétricos e dependentes da seqüência de exec
Publicado em: 2008