报 告 人：王立联 Associate Professor（新加坡南洋理工大学）
报告题目：A perfect absorbing layer from inside-outinvisibility cloak for high-order simulations of scattering problems
报告时间：2017年12月22日（周五）下午15:00
报告地点：静远楼204报告厅
报告人简介：
Li-LianWang is currently an Associate Professor in the School of Mathematical Sciencesat Nanyang Technological University (NTU) in Singapore. Before joining NTU in2006, he worked as a Visiting Assistant Professor in Purdue University from2002 to 2005. His main research interest lies in high-order computationalmethods and their applications. He has published about 80 papers in top tierjournals including SIAM J. Numer. Anal., SIAM J. Sci. Comput., SIAM J. Appl.Math., Math. Comp., Appl. Comp. Harmo. Anal. etc.. with about 2100 citationcounts. His co-authored Springer book on Spectral Methods has been received inthe community.
报告摘要：
In this talk, we introduce a perfect absorbing layer related to the design of the inside-out (orinverse) invisibility cloak, which is well-suited for high-order simulation of wave scattering problems with bounded scatterers. The notion of aninside-out cloak is to hide objects in an open space by rendering the observersinside a closed region unaware of the objects outside. In principle, thiscan be achieved by compressing the waves in the open space to a finite layersurrounding the closed region. If the cloak is perfect, it can be thebest candidate of an absorbing non-reflective layer for wave scatteringproblems, especially, when one uses high-order methods. However, theideal inverse cloak is far from perfect, so the purpose of this talk is topresent ideas and techniques to make it perfect. We also report efficienthigh-order methods on accurate simulations of scattering problems arisenfrom transformation optics.