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中文
Helmert variance component estimation with non-negative constraint of covariance matrix
WANG Leyang, ZHAO Xiong, XU Wenbin, WANG Chisheng, FANG Nan, XIE Lei
Acta Geodaetica et Cartographica Sinica . 2022, (
3
): 351 -360 . DOI: 10.11947/j.AGCS.2022.20200333