网络结构、初始连接权值和阈值的选择对网络训练的影响很大，但是又无法准确获得，针对这些特点可以采用遗传算法对神经网络进行优化-Network structure, initial connection weights and threshold selection a great impact on the network training, but it is impossible to accurately obtain, these features can be used for the genetic algorithm to optimize the neural network