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arXiv 1802.03592math.AP
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参考球无相位逆散射的唯一性结果

Uniqueness results on phaseless inverse scattering with a reference ball

Deyue Zhang, Yukun Guo

摘要:

本文研究了无相位远场Helmholtz方程声逆散射问题的唯一性。一些新的技术被开发出来,以克服平移不变性所引起的单一入射平面波的困难。本文在增加一个参考球作为额外的人工不可穿越障碍物的基础上,可穿透的均匀介质)到反向障碍物(分别介质)散射系统,然后以固定平面波和若干点源的叠加作为入射波,严格证明了障碍物的位置、形状及其边界条件或折射率可由远场模式的模唯一确定。参考球技术结合入射波的叠加带来了几个突出的好处。首先,我们的理论分析框架可以适用于逆障碍物和介质散射问题。其次,对于逆障碍物散射,底层边界条件可以是一般类型的并且是唯一确定的。最后,只需要一个频率。

英文摘要:

This paper is devoted to the uniqueness in inverse acoustic scattering problems for the Helmholtz equation with phaseless far-field data. Some novel techniques are developed to overcome the difficulty of translation invariance induced by a single incident plane wave. In this paper, based on adding a reference ball as an extra artificial impenetrable obstacle (resp. penetrable homogeneous medium) to the inverse obstacle (resp. medium) scattering system and then using superpositions of a fixed plane wave and some point sources as the incident waves, we rigorously prove that the location and shape of the obstacle as well as its boundary condition or the refractive index can be uniquely determined by the modulus of far-field patterns. The reference ball technique in conjunction with the superposition of incident waves brings in several salient benefits. First, the framework of our theoretical analysis can be applied to both the inverse obstacle and medium scattering problems. Second, for inverse obstacle scattering, the underlying boundary condition could be of a general type and be uniquely determined. Finally, only a single frequency is needed.

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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