Stability of an inverse source problem for the damped biharmonic plate equation

Stability of an inverse source problem for the damped biharmonic plate equation
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阻尼双调和板方程反源问题的稳定性

DOI:
10.1088/1361-6420/ac104e
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发表时间:
2021-02
期刊:
影响因子:
2.1
通讯作者:
Yue Zhao
Yue Zhao
中科院分区:
数学2区
文献类型:
--
作者:
Peijun Li;Xiaohua Yao;Yue Zhao

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本文讨论了三维有阻尼板双调和方程的逆源问题的稳定性。稳定性估计由Lipschitz型数据偏差和源函数的高频尾部组成,后者随着频率上界的增加而减小。稳定性还表现出对阻尼系数的指数依赖关系。分析的内容包括阻尼板波动方程的Carleman估计和时间衰减估计,以获得精确的可观测界,以及双调和算子关于复波数的无共振区和预解的上界的研究。
This paper is concerned with the stability of the inverse source problem for the damped biharmonic plate equation in three dimensions. The stability estimate consists of the Lipschitz type data discrepancy and the high frequency tail of the source function, where the latter decreases as the upper bound of the frequency increases. The stability also shows exponential dependence on the damping coefficient. The ingredients of the analysis include Carleman estimates and time decay estimates for the damped plate wave equation to obtain an exact observability bound, and the study of the resonance-free region and an upper bound of the resolvent for the biharmonic operator with respect to the complex wavenumber.
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