arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.3349math.AP
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用边界测量法稳定确定弹性体中的夹杂物(未删节)

Stable determination of an inclusion in an elastic body by boundary measurements (unabridged)

Giovanni Alessandrini, Michele Di Cristo, Antonino Morassi, Edi Rosset

摘要:

本文研究了用Dirichlet-to-Neumann映射识别弹性体中未知夹杂的反问题。本体由线弹性的、均质的、各向同性的材料制成。夹杂物的Lamé模量是恒定的,并且与周围材料的Lamé模量不同。在弱先验正则性假设下,建立了对数稳定性估计。为了证明,我们扩展的方法用于电和热导体在一个新的方式。主要工具是基于三球不等式的Lamé系统解的小性参数的传播和存在包含时Lamé系统基本解的精细局部逼近。

英文摘要:

We consider the inverse problem of identifying an unknown inclusion contained in an elastic body by the Dirichlet-to-Neumann map. The body is made by linearly elastic, homogeneous and isotropic material. The Lamé moduli of the inclusion are constant and different from those of the surrounding material. Under mild a-priori regularity assumptions on the unknown defect, we establish a logarithmic stability estimate. For the proof, we extend the approach used for electrical and thermal conductors in a novel way. Main tools are propagation of smallness arguments based on three-spheres inequality for solutions to the Lamé system and refined local approximation of the fundamental solution of the Lamé system in presence of an inclusion.

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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