应数学系刘胜强教授的邀请,加拿大Alberta大学数学与统计学系王皓教授将于将于2018年6月26日来公司进行学术交流,并举办种群生态系统反应扩散方程模型讲座,欢迎公司相关专业的老师和同学参加。
报告题目:On impulsive reaction-diffusion-advection models in higher dimensions
时 间:2018年6月26下午15:30-17:00
地 点:格物楼 522室(请注意不是503室)
报告摘要:We formulate a general impulsive reaction-diffusion-advection equation model to describe the population dynamics of species with distinct reproductive and dispersal stages. The seasonal reproduction is modeled by a discrete-time map, while the dispersal is modeled by a reaction-diffusion-advection partial differential equation. Study of this model requires a simultaneous analysis of the differential equation and the recurrence relation. When boundary conditions are hostile we provide critical domain results showing how extinction versus persistence of the species arises, depending on the size and geometry of the domain. We show that there exists an extreme volume size such that if the region size falls below this size the species is driven extinct, regardless of the geometry of the domain. To construct such extreme volume sizes and critical domain sizes, we apply the classical Rayleigh-Faber-Krahn inequality and the spectrum of uniformly elliptic operators. The critical domain results provide qualitative insight regarding long-term dynamics for the model. Last, we provide applications of our main results to certain biological reaction-diffusion models regarding marine reserve, terrestrial reserve, insect pest outbreak, and population subject to climate change.
*This is a joint work with Mostafa Fazly (University of Texas at San Antonio) and Mark A. Lewis (University of Alberta).
专家简介:王浩,现任加拿大Alberta大学数学与统计学系副教授,2003年毕业于中国科学技术大学,获数学和计算机科学双理学学士学位,2006年在美国亚利桑那州立大学获数学博士学位,导师为况阳教授;2007年1月至7月为亚利桑那州立大学博士后;2007年8月至2009年6月为佐治亚理工大学博士后;2009年7月至今任加拿大Alberta大学助理教授、副教授(2015)。王皓教授研究兴趣为微分方程及其在生命科学中的应用,近年来,他在多尺度建模(多尺度的时间和/或空间)、化学计量建模、微生物学、生态毒理学、物种入侵和传染病等领域已经完成了许多重要的研究成果。相关成果发表在包括SIAM 系列、Bull.Math.Biol.、J.Math.Biol.、J.Theo.Biol.等知名学术期刊上,发表学术论文超过50余篇,主持加拿大自然科学和工程研究基金(NSERC)项目多项。