Quadratic Convergence of Levenberg-Marquardt Method for Elliptic and Parabolic Inverse Robin Problems

Quadratic Convergence of Levenberg-Marquardt Method for Elliptic and Parabolic Inverse Robin Problems
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椭圆和抛物型逆罗宾问题的 Levenberg-Marquardt 方法的二次收敛性

DOI:
10.1051/m2an/2018016
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发表时间:
2018-05
期刊:
ESAIM: Mathematical Modelling and Numerical Analysis
影响因子:
--
通讯作者:
Jun Zou
Jun Zou
中科院分区:
其他
文献类型:
--
作者:
蒋代军;Hui Feng;Jun Zou

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研究了求解椭圆型和抛物型方程组Robin系数的高度非线性不适定反问题的Levenberg-Marquardt(L-M)方法。L-M方法将Tikhonov正则化的非线性非凸极小化问题转化为凸极小化问题。在L-M迭代过程中,采用一种新的正则化参数自适应选择策略,首次严格证明了L-M方法对非线性椭圆和抛物反问题的二次收敛性.然后采用代理泛函方法求解强病态凸极小化问题,从而在每次L-M迭代中得到椭圆和抛物情形下的显式极小化解.数值实验证明了该方法的准确性和有效性。
We study the Levenberg-Marquardt (L-M) method for solving the highly nonlinear and ill-posed inverse problem of identifying the Robin coefficients in elliptic and parabolic systems. The L-M method transforms the Tikhonov regularized nonlinear non-convex minimizations into convex minimizations. And the quadratic convergence of the L-M method is rigorously established for the nonlinear elliptic and parabolic inverse problems for the first time, under a simple novel adaptive strategy for selecting regularization parameters during the L-M iteration. Then the surrogate functional approach is adopted to solve the strongly ill-conditioned convex minimizations, resulting in an explicit solution of the minimisation at each L-M iteration for both the elliptic and parabolic cases. Numerical experiments are provided to demonstrate the accuracy and efficiency of the methods.
DOI: 10.1051/cocv:2008043
发表时间: 2009-07
期刊: ESAIM: Control, Optimisation and Calculus of Variations
影响因子: --
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