一个用delphi写的基于bp网络逼近函数的方法的源程序，程序提供的逼近函数包括：sin(x)*exp(-x)、sin(x)/x\\1/(1+exp(-x))、(1-exp(-x))/(1+exp(-x))、阶跃、高斯。~..~

-with a written bp - based networks function approximation of the original source code. procedures for the approximation functions include : sin (x) * exp (-x), sin (x) / x \\ 1 / (1 exp (-x)), (1 - exp (-x)) / (1 exp (-x)), Step, Gaussian. ~ ~ ..