variance covariance propagation
variance covariance propagation
方差协方差传播
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The research of variance covariance propagation of nonlinear least squares adjusted parameters must keep in step with the development of nonlinear least squares adjustment in this area.
对于非线性最小二乘平差参数的方差协方差传播的研究，必须与非线性最小二乘平差的研究同步。
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