用协方差矩阵配合模型的结果显示，精神因素对糖尿病的患病状况不仅有直接影响，同时也有间接影响。

Results of linear structural relation model based on covariance matrix showed that psychological factors affected the development of NIDDM not only directly but also indirectly.

youdao

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.

youdao

导向矢量失配和协方差矩阵失配是影响空时自适应处理（STAP）性能的两大主要因素，基于在最差情况下的性能最优，提出了一种稳健的STAP算法。

There are two important factors that affect the performance of Space-Time Adaptive Processing(STAP), that are steering vector mismatch and covariance matrix mismatch.

youdao