BIBLIOS

Document type
Conference papers

Document subtype
Full paper

Title
A Repair Operator for Global Solutions of Decomposable Problems

Participants in the publication
Vítor Barbosa (Author)
INSTITUTO POLITÉCNICO DE SETÚBAL - ESCOLA SUPERIOR DE TECNOLOGIA
FCIÊNCIAS.ID - ASSOCIAÇÃO PARA A INVESTIGAÇÃO E DESENVOLVIMENTO DE CIÊNCIAS
Ana Respício (Author)
Dep. Informática
CMAFcIO
Filipe Alvelos (Author)
UNIVERSIDADE DO MINHO

Summary
This paper proposes a new repair operator to be used inside algorithms based on the concept of Search by Column Generation (SearchCol). This concept has revealed to be suitable to address problems represented by models that decompose the problem into several subproblems and in which a global solution can be obtained by combining solutions of the subproblems. SearchCol starts by solving the linear relaxation of the integer programming decomposition model using column generation. Metaheuristics are then used to search for the best global integer solution by combining subproblems' solutions. The new repair operator intents to fix the invalid solutions but ends up has a generator of new subproblems' solutions and allows to change the search space as the metaheuristic explores the search space. The success of the repair operator is verified in a SearchCol based evolutionary algorithm to solve a Bus Driver Rostering Problem.

Editor(s)
Pearce D and Pinto S


Event
STAIRS 2016: Proceedings of the Eighth European Starting AI Researcher Symposium

Publication Identifiers
ISBN - 9781614996811

Organizers
Pearce D and Pinto S

Publisher
IOS Press

Collection
Frontiers in Artificial Intelligence and Applications



Document Identifiers
DOI - https://doi.org/10.3233/978-1-61499-682-8-143
URL - http://ebooks.iospress.nl/volumearticle/45050
ISBN - 978-1-61499-682-8

Keywords
Search Column generation metaheuristics repair operator.

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