Abstract (EN):
GRASP with path-relinking (GRASP+PR) is a metaheuristic for finding optimal or near-optimal solutions of combinatorial optimization problems. This paper proposes a new automatic parameter tuning procedure for GRASP+PR heuristics based on a biased random-key genetic algorithm (BRKGA). Given a GRASP+PR heuristic with n input parameters; the tuning procedure makes use of a BRKGA in a first phase to explore the parameter space and set the parameters with which the GRASP+PR heuristic will run in a second phase. The procedure is illustrated with a GRASP+PR for the generalized quadratic assignment problem with n = 30 parameters. Computational results show that the resulting hybrid heuristic is robust.
Language:
English
Type (Professor's evaluation):
Scientific
Contact:
paola.festa@unina.it; jfgoncal@fep.up.pt; mgcr@research.att.com; rmas@dcc.ufla.br; paola.festa@unina.it
No. of pages:
12