掌握用BP网络解决实际预测问题的方法，包括数据规格化处理、训练样本和测试样本的组织，网络隐层层数和神经元个数的确定，以及传递函数和训练参数的确定等。-Mastered the method of BP network to solve practical prediction problems, including the normalized data processing, training samples and test samples of tissue, the number of hidden layers and the determination of the number of neurons, as well as determine the transfer function and training parameters.