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arXiv 2002.09242math.APmath-phmath.MP
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多频介质反问题的稳定性

Stability for the multifrequency inverse medium problem

Gang Bao, Faouzi Triki

摘要:

多频一维逆介质问题的求解是通过测量多个频率的散射波来恢复介质的折射率。当频率取值于有界区间时,本文给出了严格的稳定性估计,并证明了随着频率区间宽度的增大,介质反问题的不适定性减弱。更准确地说,在折射率的某些规律性假设下,估计表明,霍德尔稳定性的功率是频带中最大值的增函数。最后,Lipschitz稳定性估计得到的可观测部分的介质函数定义通过截断迹公式。

英文摘要:

The solution of a multi-frequency 1d inverse medium problem consists of recovering the refractive index of a medium from measurements of the scattered waves for multiple frequencies. In this paper, rigorous stability estimates are derived when the frequency takes value in a bounded interval.It is showed that the ill-posedness of the inverse medium problem decreases as the width of the frequency interval becomes larger. More precisely, under certain regularity assumptions on the refractive index, the estimates indicate that the power in Hölder stability is an increasing function of the largest value in the frequency band. Finally, a Lipschitz stability estimate is obtained for the observable part of the medium function defined through a truncated trace formula.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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