In truth, the crisis will make models more useful.

实际上，这场危机会让模型更加实用了。

In this information society, huge data accumulated speedily everyday need effective tools to make models and analyze.

在当今的信息社会，日益剧增的数据量需要有效的工具来对这些数据进行建模和分析。

At last we make models of national economy system with these programs and we analyse the goodness or badness of these three algorithms.

本文最后运用三种方法对国民经济系统进行了建摸，由此分析了三种方法的优劣。

Empirical mode decomposition is used for pre-processing. Decompose time series, then make models separately and combine all the values.

先将非平稳时间序列进行经验模式分解，再对各个分量分别建模，最后将各分量预测结果进行组合。