一种基于二次变异策略的改进型遗传算法

Improved genetic algorithm based on double mutation operators

通过对基本遗传算法采用单点位变异和倒置变异两次变异操作进行改进,并把该算法应用到TSP问题的求解中。仿真结果表明,改进后的算法提高了种群的多样性,增强了算法的局部搜索能力,从而使最终找到的解比基本遗传算法更优。另外,二次变异的改进遗传算法对种群规模的敏感性比非二次变异的基本遗传算法更强,相同条件下当增大种群规模时,二次变异的改进算法能得到更优的解。

Simple genetic algorithm is improved by using single point mutation and inversion mutation operators. The algorithm is applied to Traveling Salesman Problem（TSP）. Simulation results show the diversity of population can be also improved by uising the modified algorithm. The local search capacity of the algorithm is effectively improved. The algo-rithm can find better solution than the simple genetic algorithm. In addition, the improved genetic algorithm has higher sensitivity for population size. Under the same conditions, when the population size increases, the improved algorithm can get a better solution.