Modified evolution strategies with a diversity-based parent-inclusion scheme

Abstract

There are two major variants of evolution strategies: the (/spl mu/, /spl lambda/) evolution strategy and the (/spl mu/+/spl lambda/) evolution strategy. Back et al., in a survey paper (1997), suggested that preference of either strategy is most likely problem-dependent, and that both strategies are special cases of the general (/spl mu/, /spl kappa/, /spl lambda/) evolution strategy, where /spl kappa/ denotes the maximum life span of an individual. In this paper, a diversity-based fuzzy parent-inclusion scheme is devised to make compromises between both strategies and thus retain advantages from each. Simulation results provided do manifest the virtue of this modified evolution strategy.