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