5月26日(星期五)上午:10:00-11:00,东京大学刘逸侃博士学术报告

发布者:吕小俊发布时间:2017-05-25浏览次数:690

报告时间:5月26日10:00-11:00
报告地点:九龙湖校区数学学院第一报告厅
报告人:刘逸侃博士
报告人单位:东京大学
报告题目:An inverse source problem for (time-fractional) diffusion equations
报告摘要:In this talk, we consider the reconstruction of (t) in the (time-fractional) diffusion equation by the observation at a single point x0. We are mainly concerned with the situation of x0 ̸∈ supp g, which is practically important but has not been well investigated in literature. Assuming the finite sign changes of  and an extra observation interval, we establish the multiple logarithmic stability for the problem based on a reverse convolution inequality and a lower estimate for positive solutions. Meanwhile, we develop a fixed point iteration for the numerical reconstruction and prove its convergence. The performance of the proposed method is illustrated by several numerical examples. This is a joint work with Mr. Zhidong Zhang (Texas A&M University).