报告题目:Radiation conditions for time-harmonic scattering by locally perturbed periodic structures
报 告 人:胡广辉 教授
所在单位:南开大学数学科学学院
报告时间:2022年07月15日 星期五 上午9:00-9:40
报告地点:腾讯会议:634-753-866
点击链接入会,或添加至会议列表:https://meeting.tencent.com/dm/CrAcoemzXQCs
校内联系人:吕俊良 lvjl@jlu.edu.cn
报告摘要: The Rayleigh expansion radiation condition was originally proposed by Lord Rayleigh in 1907, and since then has been widely used for grating diffraction problems. Due to the existence of guided/Floquet wave modes (solutions to the homogeneous problem), this radiation condition appears not sharp enough to imply well-posedness of scattering problems in periodic structures with local perturbations. In this talk we shall define several new radiation conditions and use them to prove well-posedness of time-harmonic scattering by periodic curves of Dirichlet kind with local perturbations.
报告人简介: 胡广辉,南开大学数学科学学院教授, 博士生导师。 2009年在中国科学院应用数学所获得博士学位,2009年至2016年工作于德国魏尔斯特拉斯研究所,2016年入选国家海外人才青年项目,2020年入选德国洪堡基金会高级访问学者项目。目前已在ARMA,SIAM系列, JDE, M3AS, J. Math. Pures Appl.,Inverse Problems,JCP等国际知名刊物上发表学术论文70余篇。研究方向主要包括声波、弹性波和电磁波正反散射问题的理论分析及数值计算.