遗传算法通用函数，非常实用和珍贵
描述简介如下：
% [BestPop,Trace]=fmaxga(FUN,LB,UB,eranum,popsize,pcross,pmutation)
% Finds a　maximum of a function of several variables.
% fmaxga solves problems of the form:
%　　　max F(X)　subject to:　LB <= X <= UB(General functions of genetic algorithms,
% [BestPop, Trace]=fmaxga (FUN, LB, UB, eranum, popsize, pcross, pmutation)
% Finds a maximum of a function of several variables.
% fmaxga solves problems of the form:
% max F (X) subject to: LB X < < = UB)