在构建协方差矩阵时，时窗的选取是一个很重要的因素，本文给出了道自相关法和过零点法。

When founding the covariance matrix, the choosing of the time window is very important, and this article introduce two ways to choose the time window, the autocorrelation and passing zero point.

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波普尔的境况分析方法直接源于经济学的“零点法”，其实质就是运用“批判理性主义”原则对人的行为进行客观理解。

Poppers method of situational analysis directly originated from the "Zero method" in economics, its essence being to understand objectively mans behavior by the principle of "critical rationalism".

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波普尔的境况分析方法直接源于经济学的“零点法”，其实质就是运用“批判理性主义”原则对人的行为进行客观理解。

Poppers method of situational analysis directly originated from the "Zero method" in economics, its essence being to understand objectively mans behavior by the principle of "critical rationalism".

youdao