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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2020.tde-23072020-154136
Document
Author
Full name
Danilo Françoso Tedeschi
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2020
Supervisor
Committee
Andretta, Marina (President)
Helou Neto, Elias Salomão
Lobato, Rafael Durbano
Schouery, Rafael Crivellari Saliba
Title in English
New Exact Algorithms for Planar Maximum Covering Location by Ellipses Problems
Keywords in English
Combinatorial optimization
Exact algorithms
Planar covering by ellipses
Planar maximal covering location problem
Abstract in English
Planar Maximum Covering Location by Ellipses is an optimization problem where one wants to place fixed shape ellipses on the plane to cover demand points maximizing a function depending on the value of covered points. We propose new exact algorithms for two versions of this problem, one where the ellipses have to be parallel to the coordinate axis, and another where they can be freely rotated. Besides finding optimal solutions for previously published instances, including the ones where no optimal solution was known, both algorithms proposed by us were able to obtain optimal solutions for some new larger instances having with up to seven hundred demand points and five ellipses.
Title in Portuguese
Algoritmos para Problemas de Cobertura Máxima por Elipses
Keywords in Portuguese
Cobertura planar por ellipses, Algoritmos exatos
Otimização combinatorial
Abstract in Portuguese
Cobertura Máxima Planar por Ellipses é um problema de otimização em que deseja-se determinar o local para ellipses de forma fixa no plano para cobrir pontos de demanda para maximizar uma função que depende do valor dos pontos cobertos. Neste trabalho, propomos novos algoritmos exatos para duas versões desse problema, uma em que as ellipses tem que ser paralelas em relação aos eixos do sistema de coordenadas, e outro em que elas podem ser rotacionadas livremente. Além de encontrarmos soluções ótimas para instâncias previamente publicadas, incluindo aquelas que nenhuma solução ótima era conhecida, ambos algoritmos propostos por este trabalho também foram capazes de determinar soluções ótimas para novas instâncias com até setecentos pontos e cinco ellipses.
 
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Publishing Date
2020-07-23
 
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