报告题目：Fast Algorithms in Modeling of Electromagnetic and Elastic Wave Propagation and Scattering
报告人：Jiming Song 教授，美国艾奥瓦州立大学
An introduction about fast algorithms in computational electromagnetics will be given first. The electromagnetic field scattering by arbitrarily shaped objects can be obtained by finding the solution of an integral equation. The integral equation is discretized by the standard method of moments (MoM). If the resultant matrix equation is solved by Gaussian elimination, it requires O(N^3) floating-point operations to solve N linear equations, or O(N^2) operations per iteration for iterative solvers. With the fast multipole method (FMM) and the multilevel fast multipole algorithm (MLFMA), the complexity of matrix-vector multiply in iterative solvers is reduced to O(N^1.5) or O(NlogN). The FMM and MLFMA also require less memory, and hence, can solve a larger problem on a small computer. Finally, our most recent research results on developing efficient algorithms on acoustic and elastic wave propagation and scattering will be presented.
Jiming Song received Ph.D. degree in Electrical Engineering from Michigan State University in 1993. From 1993 to 2000, he worked as a Postdoctoral Research Associate, a Research Scientist and Visiting Assistant Professor at the University of Illinois at Urbana-Champaign. From 1996 to 2000, he worked part-time as a Research Scientist at SAIC-DEMACO. Dr. Song was the principal author of the Fast Illinois Solver Code (FISC). He was a Principal Staff Engineer/Scientist at Semiconductor Products Sector of Motorola in Tempe, Arizona before he joined Department of Electrical and Computer Engineering at Iowa State University as an Assistant Professor in 2002.
Dr. Song currently is a Professor at Iowa State University’s Department of Electrical and Computer Engineering. His research has dealt with modeling and simulations of interconnects on lossy silicon and RF components, electromagnetic wave scattering using fast algorithms, the wave propagation in metamaterials, acoustic and elastic wave propagation and non-destructive evaluation, and transient electromagnetic field. He received the NSF Career Award in 2006 and is an IEEE Fellow.