Secondly, time series trend analysis models in common use are introduced, whose illative process and applicability are also expatiated.
其次，研究了常用的时序数据趋势分析模型，并对它们的推理过程和适用性进行了详细的阐述。
As one of the branches of statistics, time series analysis focuses on the variation characters and trend of discrete ordered data series mainly.
时间序列分析是统计学的分支之一，它的研究对象是离散有序数列的变化特征和变化趋势。
The characteristics of this method are analyzed, and the difficulties in time-series trend analysis are discussed, too.
分析了该方法的特点，指出时间序列趋势分析的难点所在。
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