A comparison of operator utility measures for on-line operator selection in local search

  • Authors:
  • Nadarajen Veerapen;Jorge Maturana;Frédéric Saubion

  • Affiliations:
  • LERIA, LUNAM Université, Université d'Angers, Angers, France;Instituto de Informática, Universidad Austral de Chile, Valdivia, Chile;LERIA, LUNAM Université, Université d'Angers, Angers, France

  • Venue:
  • LION'12 Proceedings of the 6th international conference on Learning and Intelligent Optimization
  • Year:
  • 2012

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Abstract

This paper investigates the adaptive selection of operators in the context of Local Search. The utility of each operator is computed from the solution quality and distance of the candidate solution from the search trajectory. A number of utility measures based on the Pareto dominance relationship and the relative distances between the operators are proposed and evaluated on QAP instances using an implied or static target balance between exploitation and exploration. A refined algorithm with an adaptive target balance is then examined.