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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2018.tde-20032018-111610
Document
Author
Full name
Maria Cristina Nogueira Gramani
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1997
Supervisor
Committee
Arenales, Marcos Nereu (President)
França, Paulo Morelato
Lorena, Luiz Antonio Nogueira
Title in Portuguese
Problema de Corte Bidimensional Guilhotinado Restrito em 2-Estágios
Keywords in Portuguese
Não disponível
Abstract in Portuguese
Uma placa de dimensões (L,W) deve ser cortada para produzir m peças de dimensões (li, wi), às quais estão associados valores de utilidade vi e um limite máximo bi (problema restrito), i =1,...,m. Os cortes são do tipo guilhotinado e limitados a 2-estágios. O problema consiste em maximizar o valor de utilidade total. Neste trabalho estendemos a abordagem clássica de Glmore e Gomory para problemas irrestritos, onde apresentamos um modelo matemático de otimização inteira não-linear, e propomos métodos de solução baseados na relaxação lagrangeana e heurísticas. Resultados computacionais são apresentados ao final.
Title in English
Not available
Keywords in English
Not available
Abstract in English
Consider a plate of dimensions (L,W) to be cut in order to produce m pieces of dimensions (li, wi), to which are associated utility values vi and upper bounds bi (constraint problem), i = 1,..., m. The cuts are guillotine typed and limited by 2-stages. The problem consists of maximizing the total utilþ value. In this work we extend the classical approach of Gilmore and Gomory for unconstrained problems, through modeling the problem as a nonlinear integer progftùme, for which we devise a lagrangean method and heuristics. Finally, computational experiments are presented.
 
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Publishing Date
2018-03-20
 
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