arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1801.04037math.AP
收藏

弱奇异角点总是分散的

Weakly singular corners always scatter

Long Li, Guanghui Hu, Jiansheng Yang

摘要:

假设一个有界散射体被嵌入到一个无限大的二维均匀各向同性背景介质中。假设折射率函数是分段常数。当散射界面存在弱或强奇点时,我们证明了散射场不可能恒为零。这特别导致了具有弱奇点的分段解析界面的非散射能量的缺失。本文给出了单个远场方向图逆散射形状识别问题的局部唯一性。

英文摘要:

Assume that a bounded scatterer is embedded into an infinite homogeneous isotropic background medium in two dimensions. The refractive index function is supposed to be piecewise constant. If the scattering interface contains a weakly or strongly singular point, we prove that the scattered field cannot vanish identically. This particularly leads to the absence of non-scattering energies for piecewise analytic interfaces with a weakly singular point. Local uniqueness is obtained for shape identification problems in inverse medium scattering with a single far-field pattern.

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。

↑