一、 基本知识 时间序列：在规则的、连续的时间间隔内，对同一指标进行测量所得到的数据序列。 经济时间序列及特点：反映经济现象的时间序列称为经济时间序列。经济时间序列的重要特点包括趋势、转折点和指标间的一致性。趋势是指随着时间的延续序列的数值是增还是降； First, the basic knowledge of time series: In the regular, continuous time interval, the same indicator of the data obtained by measuring the sequence. Economic time series and characteristics: Time series reflecting economic phenomena are called economic time series. Key features of economic time series include trends, turning points and consistency between indicators. Trend refers to the value of the sequence is increasing or decreasing over time;