Improving Evolutionary Algorithms with Scouting: High---Dimensional Problems

  • Authors:
  • Konstantinos Bousmalis;Jeffrey O. Pfaffmann;Gillian M. Hayes

  • Affiliations:
  • School of Informatics, The University of Edinburgh, Edinburgh, UK;Department of Computer Science, Lafayette College, Easton, USA PA 18042;Institute of Perception, Action and Behavior(IPAB), School of Informatics, The University of Edinburgh, Edinburgh, UK

  • Venue:
  • ICAISC '08 Proceedings of the 9th international conference on Artificial Intelligence and Soft Computing
  • Year:
  • 2006

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Abstract

Evolutionary Algorithms (EAs) are common optimization techniques based on the concept of Darwinian evolution. During the search for the global optimum of a search space, a traditional EA will often become trapped in a local optimum. The Scouting-Inspired Evolutionary Algorithms (SEAs) are a recently---introduced family of EAs that use a cross---generational memory mechanism to overcome this problem and discover solutions of higher fitness. The merit of the SEAs has been established in previous work with a number of two and three-dimensional test cases and a variety of configurations. In this paper, we will present two approaches to using SEAs to solve high---dimensional problems. The first one involves the use of Locality Sensitive Hashing (LSH) for the repository of individuals, whereas the second approach entails the use of scouting---driven mutation at a certain rate, the Scouting Rate. We will show that an SEA significantly improves the equivalent simple EA configuration with higher---dimensional problems in an expeditious manner.