几种粗差估值方法的比较

基于均值漂移模型,重点讨论粗差估值的计算问题,给出了观测值统计相关时数据探测法(data snooping)的粗差估值公式。探讨数据探测法粗差估值与粗差的同时定位与定值法(LEGE)、拟准检定法(QUAD)、部分最小二乘法(PLS)的粗差估值之间的关系,证明当观测值统计相关时,部分最小二乘法和QUAD法在粗差估值的计算上具有等价性,与数据探测法和LEGE法都不一致。当观测值统计独立且不等权时,QUAD法、PLS法和数据探测法具有等价性,与LEGE法在粗差估值上不同;当观测值统计独立且等权时,4种方法在粗差估值计算上具有等价性。最后通过算例验证了结论。...

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Bibliographic Details
Published in测绘学报 Vol. 45; no. 6; pp. 656 - 662
Main Author 鲁铁定
Format Journal Article
LanguageChinese
Published 东华理工大学测绘工程学院,江西南昌330013 2016
流域生态与地理环境监测国家测绘地理信息局重点实验室,江西南昌330013
长安大学地质工程与测量学院,陕西西安710054
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ISSN1001-1595
DOI10.11947/j.AGCS.2016.20130745

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Summary:基于均值漂移模型,重点讨论粗差估值的计算问题,给出了观测值统计相关时数据探测法(data snooping)的粗差估值公式。探讨数据探测法粗差估值与粗差的同时定位与定值法(LEGE)、拟准检定法(QUAD)、部分最小二乘法(PLS)的粗差估值之间的关系,证明当观测值统计相关时,部分最小二乘法和QUAD法在粗差估值的计算上具有等价性,与数据探测法和LEGE法都不一致。当观测值统计独立且不等权时,QUAD法、PLS法和数据探测法具有等价性,与LEGE法在粗差估值上不同;当观测值统计独立且等权时,4种方法在粗差估值计算上具有等价性。最后通过算例验证了结论。
Bibliography:11-2089/P
mean shift data snooping; outlier estimation; the method of simultaneous locating andevaluating multidimensional gross errors(LEGE); quasi-detection of gross errors(QUAD); partly leastsquares(PLS)
Computational problem of gross errors estimation is discussed based on the mean shift model, and the gross errors estimation formulas of the observed statistical correlation data snooping method are given. The relationships of gross errors estimation of the data snooping method, the method of simultaneous locating and evaluating multidimensional gross errors (LEGE), quasi-accurate detection of gross errors (QUAD) method and the partial least-squares (PLS) method are discussed. It is proved that ①in the case of correlated observations, calculation of gross errors estimation of the PLS method and the QUAD method are equivalent. However, these two methods are different with the data snooping method and the LEGE method; ②in the case of uncorrelated and unequal weight observations, calculation of gross errors est
ISSN:1001-1595
DOI:10.11947/j.AGCS.2016.20130745