用U曲线法确定地震同震滑动分布反演正则化参数

针对地震滑动分布反演中正则化参数选取问题，提出利用U曲线法确定地震滑动分布反演正则化参数。利用U曲线法、L曲线法设计模拟实验，并将两种方法应用到芦山实际震例反演中。模拟实验以及芦山实际震例反演结果表明，利用U曲线法确定正则化参数反演地震滑动分布结果与L曲线法相比具有反演精度高、无需依赖数据拟合精度等优势。

Using U Curve Method to Determine the Regularization Parameters of Coseismic Earthquake Slip Distribution Inversion

The determination of regularization parameters is the key to the inversion of coseismic earthquake slip distribution. In view of the selection of regularization parameters in seismic slip distribution inversion, the U curve method is proposed in this paper. Using the U curve method and L curve method to design the simulation experiment. Moreover, the two methods are applied to the inversion of Lushan earthquake. The inversion results of simulation experiment and the Lushan earthquake show that the regularization parameters obtained by U curve method has the advantage of high accuracy and no need to rely on data fitting accuracy than L curve method in coseismic slip distribution inversion.