摘要
粗差是离群的误差,由失误、观测(函数)模式差、分布模式差而来。如果在观测值中含有粗差,那么当采用加权最小二乘法确定下沉分布函数中待定参数时,粗差会对参数估值产生不良的影响。为此,本文指出了一种抗粗差的解法,并通过实例证明了这一方法的有效性。
Applying the weighted least squares estimalion to determine the outstanding parameters in the subsiding distribution function, Out-lers in the Observations have harmful influence on parametric estimation. For this reason, this paper proposes a robust solution for the outstanding parameters, and proves its effectiveness in detecting and rejecting outlers automatically through examples.
出处
《江苏测绘》
1999年第4期18-20,共3页
Jiangsu Surveying and Mapping
关键词
分布函数
最小二乘估计
抗差估计
地表下沉
Distribution funtion,outstanding parameter,The least squares estimation, Robust estimation,Equivalent Weights.
