会议日程
2025年12月25日 地点：环境学院316室、腾讯会议：919-252-894 |
|
时间 |
具体安排 |
9:00-10:00
|
报告人：李建樑 教授（湖南师范大学） 线上：腾讯会议：919-252-894 题目：Uniqueness and numerical methods for the inverse scattering by a locally rough surface with buried obstacles 摘要：Consider the problem of scattering of time-harmonic point sources by an infinite locally rough interface with bounded obstacles embedded in the lower half-space. The model problem is first reduced to an equivalent integral equation formulation defined in a bounded domain, where the well-posedness is obtained in $L^p$ by the classical Fredholm theory. Then a global uniqueness theorem is proved for the inverse problem of recovering the locally rough interface, the embedded obstacles and the wave number in the lower half-space by means of near-field measurements above the interface. Moreover, the linear sampling method and reverse time migration method are introduced to reconstruct both the interface and the embedded obstacle. |
10:00-11:00 |
报告人：刘晓东 研究员（中国科学院数学与系统科学研究院） 地点：环境学院316室 题目：声源重构的直接采样法 摘要：本报告介绍我们在声源重构方面直接采样法的一些新发现。 |
11:00-12:00 |
报告人：张海文 副研究员（中国科学院数学与系统科学研究院） 地点：环境学院316室 题目： Numerical algorithms for the inverse medium scattering problem 摘要：This talk is concerned with solving numerically the two-dimensional inverse medium scattering problem with far-field data. This is a challenging task due to the severe ill-posedness and strong nonlinearity of the inverse problem. We will introduce our recent work on this topic. |