| 协方差函数的抗差拟合 |
| |
| 引用本文： | 刘念. 协方差函数的抗差拟合[J]. 测绘科学, 2002, 0(3) |
| |
| 作者姓名： | 刘念 |
| |
| 作者单位： | 国家测绘局第一地形测量队!陕西西安710054 |
| |
| 摘 要： | 如果最小二乘拟合推估法被应用在重力异常、高程异常等的内插中 ,当观测值中含有粗差时 ,由此拟合的协方差函数就不能精确表征其统计性质。本文先从协方差函数的拟合过程入手 ,通过分析传统的协方差函数拟合法的无抗差性 ,提出了协方差函数的抗差拟合法
|
| 关 键 词： | 协方差函数 等价权 迭代 |
Robust Fitting of Covariance Function |
| |
| LIU Nian. Robust Fitting of Covariance Function[J]. Science of Surveying and Mapping, 2002, 0(3) |
| |
| Authors: | LIU Nian |
| |
| Abstract: | If least squares collocation is used in the field of interpolation of gravity anomalies and height anomalies, and if outliers are contained in observation, the covariance function fitted by these data can not reflect the statistical relation of the approximation field. From the course of fitting of covariance function, the author analyzed the property of non ro bust in it, and put forward to a technique of robust fitting. |
| |
| Keywords: | covariance function equivalent weights iteration |
| 本文献已被 CNKI 等数据库收录！ |
|
