基因表达式编程中的优势种群产生策略

Superior Population Producing Strategy in Gene Expression Programming

初始种群是影响基因表达式编程算法(GEP)的重要因素之一.提出可以产生具有较高个体适应度和基因多样性种群的优势种群产生策略.优势种群产生策略继承了基因空间均匀分布策略和精英个体产生策略的优点,产生的初始种群最高适应度个体的适应度较高,而且种群具有基因多样性特征.实验表明,优势种群产生策略可以显著提高进化的成功率,从而提高系统的进化效率.

Initial population is one of the factors that influence the evolution of gene expression programming. Superior population producing strategy （SPPS） is presented. SPPS inherits the advantage of gene space balance strategy （GSBS） and Elitism producing strategy （EPS）. The initial population produced by SPPS possesses genes diversity and has a chromosome with higher fitness. The simulation experiments show that SPPS can increase the success rate of evolution markedly. So the evolutionary efficiency is increased evidently.