學術(shù)報告預告(主講人:呂俊良,時間:9月24日)
報告題目:Uniqueness and numerical method for phaseless inverse diffraction grating problem with known superposition of incident point sources
報告人:呂俊良教授
報告邀請人:周艷輝
報告時間:2024年9月24日(星期二),19:30-20:30
報告地點:騰訊會議882 259 412
內(nèi)容摘要:In this talk, I will introduce some results on uniqueness and numerical methods of identifying a smooth grating profile with a mixed or transmission boundary condition from phaseless data. The existing uniqueness result requires the measured data to be in a bounded domain. To break this restriction, we design an incident system consisting of the superposition of point sources to reduce the measurement data from a bounded domain to a line above the grating profile. An iterative algorithm is proposed to recover the Fourier modes of grating profiles at a fixed wavenumber.
報告人簡介:呂俊良,吉林大學數(shù)學學院,教授,博導。研究興趣包括無界域散射問題的數(shù)值方法,反散射問題的數(shù)值算法與理論,偏微分方程有限體積元法等。研究成果發(fā)表在SIAM J. Numer. Anal.,Math. Comput.,Inverse Problems, J.Sci. Comput.以及IMA J. Numer. Anal.等雜志上。承擔國家自然科學基金項目、國防項目、吉林省自然科學基金等?,F(xiàn)任中國數(shù)學會計算數(shù)學分會理事、中國仿真學會仿真算法專委會委員、吉林省數(shù)學會理事、美國數(shù)學會數(shù)學評論員。
歡迎感興趣的老師和同學參加!
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