bpnet举例，因为BP网络的权值初始化都是随机生成，所以每次运行的状态可能不一样。 如果初始化的权值有利于训练，那么可能很快能结束训练。-bpnet For example, because the BP network, initialize the weights are randomly generated, so every time the state may not be the same as running. If the initialization of the wei