报告题目:Long-term analysis of symmetric and/or symplectic extended RKN integrators
报 告 人:王斌教授 曲阜师范学院
报告地点:数学楼202
报告时间:2019年6月17日上午10:00—11:00
报告摘要:
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.
报告人简介:
王斌,曲阜师范大学教授,洪堡学者。2013年博士毕业于南京大学,2014年12月起在曲阜师范大学数学科学学院任教,2015年12月评选为副教授,2018年12月晋升教授,2017年至2019年在德国图宾根大学从事博士后研究工作。工作以来主持了多个国家和省部级基金项目,在计算数学主流期刊发表学术论文20余篇,多次受邀访问英国剑桥大学、新西兰奥克兰大学、德国图宾根大学、香港理工大学等。