arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2109.01434math.NAcs.NA
收藏

稀疏观测源反问题的多频采样方法

A multi-frequency sampling method for the inverse source problems with sparse measurements

Xiaodong Liu, Shixu Meng

摘要:

本文研究了多频稀疏准域近场测量的源反问题。针对现有的基于空间变量积分的准域算子,提出了一种基于频率变量积分的多频准域算子。进一步给出并分析了这种多频准域算子的分解。基于这种分解,我们引入了一种多频采样的方法来重建源支撑。其理论基础,然后来自于因式分解算子和适当选择的点扩散函数的性质。数值例子说明了稀疏准域测量的多频采样方法。最后简要讨论了如何将准域情形推广到远场情形。

英文摘要:

We consider the inverse source problems with multi-frequency sparse near field measurements. In contrast to the existing near field operator based on the integral over the space variable, a multi-frequency near field operator is introduced based on the integral over the frequency variable. A factorization of this multi-frequency near field operator is further given and analysed. Motivated by such a factorization, we introduce a multi-frequency sampling method to reconstruct the source support. Its theoretical foundation is then derived from the properties of the factorized operators and a properly chosen point spread function. Numerical examples are provided to illustrate the multi-frequency sampling method with sparse near field measurements. Finally we briefly discuss how to extend the near field case to the far field case.

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。

↑