时间序列模型，进行预测，是目前较流行且准确的一个方法，里面包含了2个相关方面的ppt，可供参考学习。-Time series model, forecasting, is a popular and accurate a method, there were two related PPT, available for reference to study.

流行的pads学习软件，比较详细，很好的。-Popular pads learning software, a more detailed, very good.