首先，利用GARCH模型求得权益收益的条件标准差；

First, get the equity return's conditional standard volatility by GARCH model;

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接著利用统计的方法，建立出波包标准差以及各外加条件的模型。

And try to establish a model of standard deviation of wave packet by using statistical methods.

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欧巴代II（85系列）无色显示包衣增重标准差低于相同工艺条件下的标准无色羟丙甲纤维素基薄膜包衣。

In this study, Opadry II (85 series) Clear was shown to have lower coating weight gain standard deviations than a standard clear hypromellose based film coating.

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