一种修正的Tikhonov方法求解Helmholtz方程柯西问题

2023-07-28 03:27余亚辉李振平
关键词:柯西后验先验

余亚辉 李振平

摘要:考虑矩形区域上Helmholtz方程柯西问题,该问题是一类严重不适定的偏微分方程反问题,它的解不连续依赖于输入数据.使用修正的Tikhonov正则化方法给出了该问题基于分离变量的近似解,并通过先验和后验两种不同的正则化参数选择规则得到了精确解与正则化近似解之间的Hlder型误差估计.

关键词:Helmholtz方程柯西问题;不适定问题;正则化;后验参数选取;误差估计

中图分类号:O 175 文献标志码:A 文章编号:1001-988Ⅹ(2023)04-0029-06

4 结束语

本文使用一种修正的Tikhonov方法求解矩形区域上的Helmholtz方程柯西问题,不仅给出正则化参数的先验选取下精确解与正则化近似解之间的Hlder型误差估计,还给出了正则化参数后验选取规则及误差估计.该方法可能也适用于其他不适定的反问题,这也有待于我们进一步探究.

参考文献:

[1] CHEN J T,WONG F C.Dual formulation of multiple reciprocity method for the acoustic mode of a cavity with a thin partition[J].J Sound Vib,1998,217(1):75.

[2] HALL W S,MAO X Q.Boundary element investigation of irregular frequencies in electromagnetic scattering[J].Eng Anal Bound Elem,1995,16(3):245.

[3] ISAKOV V.Inverse Problems for Partial Differential Equations[M].New York:Springer-Verlag,1998.

[4] REGISKA T,REGISKI K.Approximate solution of a Cauchy problem for the Helmholtz equation[J].Inverse Prob,2006,22:975.

[5] ZHANG Yuan-xiang,FU Chu-li,DENG Zhi-liang.An a posteriori truncation method for some Cauchy problems associated with Helmholtz-type equations[J].Inverse Prob Sci Eng,2013,21:1151.

[6] FU Chu-li,FENG Xiao-li,QIAN Zhi.The Fourier regularization for solving the Cauchy problem for the Helmholtz equation[J].Appl Numer Math,2009,59:2625.

[7] QIN Hai-hua,WEI Ting.Two regularization methods for the Cauchy problems of the Helmholtz equation[J].Appl Math Model,2010,34:947.

[8] QIN Hai-hua,WEI Ting.Modified regularization method for the Cauchy problem of the Helmholtz equation[J].Appl Math Model,2009,33:2334.

[9] QIAN Ai-lin,XIONG Xiang-tuan,WU Yu-jiang.On a quasi-reversibility regularization method for a Cauchy problem of the Helmholtz equation[J].J Comput Appl Math,2010,233:1969.

[10] XIONG Xiang-tuan.A regularization method for a Cauchy problem of the Helmholtz equation[J].J Comput Appl Math,2010,233:1723.

[11] FENG Xiao-li,FU Chu-li,CHENG Hao.A regularization method for solving the Cauchy problem for the Helmholtz equation[J].Appl Math Model,2011,35:3301.

[12] XIONG Xiang-tuan,FU Chu-li.Two approximate methods of a Cauchy problem for the Helmholtz equation[J].Comput Appl Math,2007,26:285.

[13] LI Zhen-ping,XU Chao,LAN Man,et al.A mollification method for a Cauchy problem for the Helmholtz equation[J].Int J Comput Math,2018,95(11):2256.

[14] HE Shang-qin,DI Cong-na,LI Yang.The mollification method based on a modified operator to the ill-posed problem for 3D Helmholtz equation with mixed boundary[J].Appl Numer Math,2021,160:422.

[15] XIONG Xiang-tuan,ZHAO Xiao-chen,WANG Jun-xia.Spectral Galerkin method and its application to a Cauchy problem of Helmholtz equation[J].Numer Algor,2013,63:691.

[16] QIAN Zhi,FENG Xiao-li.A fractional Tikhonov method for solving a Cauchy problem of Helmholtz equation[J].Applicable Analysis,2017,96(10):1656.

[17] 熊向團,任丽婷.一种修正的Tikhonov方法求解拉普拉斯方程的柯西问题[J].西北师范大学学报(自然科学版),2018,54(5):1.

[18] TIKHONOV A N,ARSENIN V Y.Solutions of Ill-posed Problems[M].Washington DC:Winston and Sons,1977.

(责任编辑 马宇鸿)

猜你喜欢
柯西后验先验
柯西不等式在解题中的应用
柯西不等式的变形及应用
基于对偶理论的椭圆变分不等式的后验误差分析(英)
基于无噪图像块先验的MRI低秩分解去噪算法研究
贝叶斯统计中单参数后验分布的精确计算方法
基于自适应块组割先验的噪声图像超分辨率重建
柯西不等式的应用
一种基于最大后验框架的聚类分析多基线干涉SAR高度重建算法
基于平滑先验法的被动声信号趋势项消除
先验的废话与功能的进路