中文说明：
此代码是实数编码遗传算法的Matlab例程。用了精英保留策略选择和轮盘赌选择法，叉操作采用中间重组方式。
English Description：
This code is a matlab routine of real coded genetic algorithm. The strategy selection of elitist reservation and roulette selection are used, and the cross operation adopts the way of middle reorganization