截尾正态分布与Robust估计

The Normal Distribution of Cutting off Tails and Robust Estimation

将截尾正态分布作为测量平差的误差模型，由此导出了服从截尾正态分布的极大似然估计，并且对目前测量平差中用的几种Ｒｏｂｕｓｔ估计方法与截尾正态分布的关系及在实际应用中出现的个别问题进行了探讨。

In this paper we take the normal distribution of cutting off tails as the error model of surveying adjustment,so as to dcduee maximum likelihood estimation to submit the normal dis-tribution of cutting off tails.Besides,relationships between scveral sound Robust estimation asethods appeared in literture of surveying and the normal distribution of cutting off tails are discussed.Furthermore,some existing problems of these Robust estimation methods in the practical application are probed into.