t型抗差估计及其在测量平差中的应用 |
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作者单位: | 信息工程大学理学院,信息工程大学理学院,信息工程大学理学院,信息工程大学理学院,信息工程大学理学院 河南郑州450001,河南郑州450001,信息工程大学测绘学院,河南郑州450052,河南郑州450001,河南郑州450001,河南郑州450001 |
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摘 要: | 将近年来统计界提出的并有较深入理论研究的t型估计引入测量数据处理中,提出了Gauss-Markov模型的t型抗差估计,给出了相应的EM算法,并进行了模拟计算。计算结果显示,t型抗差估计计算快捷稳定,收敛性好,并且t型抗差估计受粗差影响不大,具有较好的抗差能力。
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关 键 词: | 抗差估计 t型估计 EM算法 |
t-Type Robust Estimation and Applications in Geodetic Adjustments |
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Authors: | CHEN Ke GUI Qing-ming WEI Meng LIU Li LIU Yuan-yuan |
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Institution: | CHEN Ke1,GUI Qing-ming1,2,WEI Meng1,LIU Li1,LIU Yuan-yuan1 |
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Abstract: | t-type estimation was introduced to geodetic adjustments as a robust estimation.t-type robust estimation in Gauss-Markov Model was established and its corresponding EM algorithm was derived. A simulation example was given,which demonstrated that t-type robust estimation converges rapidly and stably,and suffered little from gross errors,showing good robustness. |
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Keywords: | robust estimation t-type estimation EM algorithm |
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