在经济领域中，运用时间序列模型来进行客观经济过程的描述和预测是一个非常重要的方法。然而在实际应用中，由于经济领域的特殊性，传统的频率统计方法进行经济时间序列模型分析往往会碰到很多困难。-In economic field，the time series models are important methods in describing and

forecasting the objective economic process．However，when put them into application，

because of the particularity of economic field，we often encounter many difficulties in the time series models analysis by using the traditional frequency statistical method．