Linkage identification by non-monotonicity detection for overlapping functions

  • Authors:
  • Masaharu Munetomo;David E. Goldberg

  • Affiliations:
  • Graduate School of Engineering Hokkaido University North 13, West 8, Kita-ku, Sapporo 060-8628, Japan munetomo@eng.hokudai.ac.jp;Illinois Genetic Algorithms Laboratory University of Illinois at Urbana-Champaign 104 South Mathews Avenue Urbana, IL 61801, USA deg@uiuc.edu

  • Venue:
  • Evolutionary Computation
  • Year:
  • 1999

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Abstract

This paper presents the linkage identification by non-monotonicity detection (LIMD) procedure and its extension for overlapping functions by introducing the tightness detection (TD) procedure. The LIMD identifies linkage groups directly by performing order-2 simultaneous perturbations on a pair of loci to detect monotonicity/non-monotonicity of fitness changes. The LIMD can identify linkage groups with at most order of k when it is applied to O(2k) strings. The TD procedure calculates tightness of linkage between a pair of loci based on the linkage groups obtained by the LIMD. By removing loci with weak tightness from linkage groups, correct linkage groups are obtained for overlapping functions, which were considered difficult for linkage identification procedures.