注意代码 的设计是求最大值，其中的目标函数只能取正值；且函数值和个体的适应值之间没有区别。该系统使用比率选择、精华模型、单点杂交和均匀变异。如果用 Gaussian变异替换均匀变异，可能得到更好的效果。-Note that the code is designed to seek maximum value, in which the objective function can only take positive　and the function value and the individual is no difference between the fitness value. The system uses the rate selection, the essence of model, one point crossover and uniform mutation. If you replace the uniform mutation with Gaussian mutation, may be more effective.