部分變量誤差模型的整體抗差最小二乘估計
[Abstract]:The weighted global least squares (weighted total least-squares,WTLS (weighted total least-squares,WTLS) estimation of partial variable error model (partial EIV model) does not have the ability to resist gross errors. In view of the fact that gross errors may appear in both observed values and coefficient matrices at the same time, based on the two-step iterative method of WTLS estimation of partial variable error model, the equivalent weight method of robust M estimation is used in this paper. In this paper, a global robust least square (TRLS) estimation method is developed, and the weight reduction factor is determined by uniform maximum efficiency statistics. According to the characteristics of two-step iterative solution of WTLS estimation, two different weight reduction schemes are designed: the first scheme is not to reduce the weight of the observed value, but only to the coefficient matrix when the element of the coefficient matrix is estimated. The second scheme is to reduce the weight of the coefficient matrix as well as the observed values when the elements of the coefficient matrix are estimated. Through the calculation and analysis of simulated 2D affine transformation and linear fitting examples, the results show that the first scheme is superior to the second scheme, and is superior to the robust estimation based on residual and post-checking unit weight variance and the existing variable error model robust estimation.
【作者單位】: 信息工程大學(xué)地理空間信息學(xué)院;信息工程大學(xué)理學(xué)院;
【基金】:國家自然科學(xué)基金(41174005;41474009)~~
【分類號】:P207
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