報告題目:Long-term analysis of symmetric and/or symplectic extended RKN integrators
報 告 人:王斌教授 曲阜師範學院
報告地點:數學樓202
報告時間:2019年6月17日上午10:00—11:00
報告摘要:
The primary objective of this talk is to present a long-term numerical energy-preserving analysis of one-stage explicit symmetric and/or symplectic extended Runge–Kutta–Nystrom (ERKN) integrators for highly oscillatory Hamiltonian systems. We study the long-time numerical energy conservation not only for symmetric integrators but also for symplectic integrators.It turns out that these both kinds of ERKN integrators have a near conservation of the total and oscillatory energy over a long term. Moreover,this talk also analyses the long-time behaviour of ERKN integrators when applied to nonlinear wave equations. It is shown that energy, momentum,and all harmonic actions are approximately preserved over a long time for one-stage explicit symplectic or symmetric ERKN integrators when applied to nonlinear wave equations via spectral semi-discretisations.
報告人簡介:
王斌,曲阜師範大學教授,洪堡學者。2013年博士畢業于南京大學,2014年12月起在曲阜師範大學數學科學學院任教,2015年12月評選為副教授,2018年12月晉升教授,2017年至2019年在德國圖賓根大學從事博士後研究工作。工作以來主持了多個國家和省部級基金項目,在計算數學主流期刊發表學術論文20餘篇,多次受邀訪問英國劍橋大學、新西蘭奧克蘭大學、德國圖賓根大學、香港理工大學等。