To direct at the voluntary of the standard back-propagation network in topology architecture and the choses of parameters, some adaptive BP networks are discussed:i.

• 针对一般BP网络的拓扑结构和参数选择的随意性问题，讨论了几种自适应BP网络，即自适应调整网络的拓扑结构和自适应调节学习步长的改进BP算法，综合二者构造了一种修正的自适应BP算法。