摘要
提出了一种解算病态问题的方法———两步解法。在两步计算中,均采用L曲线法来确定正则化参数α。通过算例,比较了该方法和LS估计、岭估计及截断奇异值方法的效果。结果表明,该方法要明显优于LS估计、岭估计及截断奇异值法。
In this paper, a resolution methods of ill-posed problems based on the Tikhonov regularization theory is studied, and a method of two-step solution is proposed. The purpose of two-step solution is to choose a more appropriate regularizer than that of the ridge estimation. This paper utilizes L-curve method to determine the regularization parameter in the above two computation steps.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2005年第9期821-824,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40474009)
中国科学院百人计划资助项目。
关键词
两步解法
正则化参数
L曲线法
岭估计
two-step solution
regularization parameter
L-curve method
ridge estimation
