遗传算法代码：对一特定的应用修正此代码，用户只需改变常数的定义并且定义“评价函数”即可。注意代码的设计是求最大值，其中的目标函数只能取正值；-Genetic algorithm source code：AlphaA specific application to amend this code, the user simply change the definition of constants and define the evaluation function can. Attention to the design of the code is the maximum, in which the objective function can only be positive