應(yīng)yl7703永利官網(wǎng)李萬同教授和孫建文副教授的邀請,香港中文大學(xué)(深圳)王學(xué)鋒教授將于2021年6月28日-6月30日與我校有關(guān)師生進(jìn)行在線學(xué)術(shù)研討,其中6月29日舉行線上專題學(xué)術(shù)報(bào)告。
報(bào)告題目:The asymptotic propagation speed of Fisher-KPP equation with effective boundary condition on a road
時(shí) 間:6月29日下午14:00.
地 點(diǎn):騰訊會議ID:694 8382 5110
報(bào)告摘要:Of concern is the Fisher-KPP equation on the xy-plane with an ``effective boundary condition'' imposed on the x-axis. This model, recently derived by Huicong Li and me, is meant to model the scenario of fast diffusion on a ``road'' in a large ``field''. In our work, the asymptotic propagation speed of this model in the horizontal direction is obtained, showing that the fast diffusion on the road does enhance spreading speed in the horizontal direction in the field. In the new joint work with Xinfu Chen and Junfeng He, we study the propagation speed in ALL directions, showing that away from the $y-$axis by a certain angle (which can be explicitly calculated in terms of parameters), the fast diffusion on the x-axis increases propagation speed, with the speed getting larger when the direction is closer to the x-axis. We also obtain the asymptotic spreading shape for the model. These results are parallel to the ones obtained by Berestycki et al. for a different model which is meant to model the same physical phenomenon. However, our method differs from theirs in that we are forced to abandon the idea using lower solutions (when deriving a lower bound for the spreading speed) and have to use the fundamental solution of the linearized problem to come up with very delicate lower bound estimates for the nonlinear problem.
歡迎廣大師生光臨!
王學(xué)鋒教授簡介
王學(xué)鋒教授于2019年8月加入香港中文大學(xué)(深圳)。在此之前,他在美國杜我校學(xué)工作了26年,2016-2019年在南方科技大學(xué)任職。主要研究方向是偏微分方程及其應(yīng)用。1984年、1986年先后于北京大學(xué)數(shù)學(xué)系獲學(xué)士學(xué)位和碩士學(xué)位,1990年于美國明尼蘇達(dá)大學(xué)數(shù)學(xué)學(xué)院獲博士學(xué)位。先后在美國明尼蘇達(dá)大學(xué)、美國猶他大學(xué)和香港浸會大學(xué)等做訪問研究員或訪問教授。主持美國國家科學(xué)基金項(xiàng)目多項(xiàng),若干論文發(fā)表在《CPAM》、《Duke Math.J》、《ARMA》、《SIAM》、《TAMS》、《CMP》等國際重要數(shù)學(xué)雜志上,論文被他引總共1100多次,近三年來在國際學(xué)術(shù)會議上給了20多個(gè)特邀報(bào)告,現(xiàn)擔(dān)任一些國際重要數(shù)學(xué)雜志的編委或副主編。
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yl7703永利官網(wǎng)
2021年6月27日