SGA（Simple Genetic Algorithm）是一种强大的智能多变量优化算法，它模仿种群繁殖规律来进行

优化。

本SGA可以优化变量，求最小值,最大值（当把函数倒数也就求最小值啦）

并且支持浮点编码，grey编码，二进制编码；轮赌法选择，锦标赛选择；单点交叉，均布交叉，浮点交叉；

单点变异，浮点变异；-SGA (Simple Genetic Algorithm) is a powerful smart multi-variable optimization algorithm, which mimics the reproduction of law to be optimized. The SGA can be optimized variables, minimum, maximum, (when the function will last for the minimum is) and support for floating-point encoding, grey code, binary code　round of betting method selection, tournament selection　single-point crossover, uniform Cross, floating-point crossover　single point mutation, floating-point mutation