摘要
岭估计的主要问题是选择合适的岭参数,本文分析和讨论了不同病态指标下,参数范数随岭参数的变化规律,提出了用斜率法确定岭参数。通过斜率法与L曲线法、LS估计的数字模拟结果显示,斜率法简单、直观,确定的岭参数合理。
The key to the ridge estimation is to select proper ridge parameter. The rule of the parameters＇ norm varying with the ridge parameter is analyzed and studied in different ill-conditioned system. Then the slope method is put forward to determine the ridge parameter. Numerical simulation of slope method and L-curve, LS estimation, demonstrates that the slope method is simple and explicit, and the ridge parameter determined is reasonable.
出处
《测绘科学》
CSCD
北大核心
2008年第2期31-32,共2页
Science of Surveying and Mapping
基金
国家自然基金(40474005)
关键词
岭参数
参数估计
病态指标
斜率法
ridge parameter
parameter estimation
ill-conditioned index
slope method
