报告题目:Existence, Uniqueness, Stability and Bifurcation of Periodic Patterns for a Seasonal Single Phytoplankton Model with Self-shading Effect
报告人:欧春华教授
报告时间: 下午 15:30—16:30
报告地点:理A 二楼教师活动中心
报告题目:Existence, Uniqueness, Stability and Bifurcation of Periodic Patterns for a Seasonal Single Phytoplankton Model with Self-shading Effect
时 间:6月6号 (周四) 下午 15:30—16:30
地 点:理A 二楼教师活动中心
报告人:欧春华教授
摘要:We study the existence, uniqueness, global attractivity and bifurcation of time-periodic patterns for a seasonal phytoplankton model with self-shading effect. By the comparison principle, we obtain the globally asymptotical stability of the zero solution when the principal eigenvalue is less than zero. When the principal eigenvalue is greater than zero, by transforming the model into a new system, we successfully prove the conjecture in previous studies on the uniqueness and attractivity of the positive periodic solution. The positive periodic pattern bifurcating from the zero solution is a very interesting phenomenon. Here we apply the Crandall and Rabinowiz's theory to prove rigorously the existence of a bifurcation point. By way of asymptotic analysis, we derive an asymptotic formula for the positive periodic pattern. Based on the solution formula, we find the linear stability of this positive pattern. Finally, we provide a numerical scheme for the calculations of the principal eigenvalue and the simulations of the solution. The simulations corroborate our theoretical analysis.
个人简介:
欧春华---教授,博士, 现为加拿大纽芬兰纪念大学(Memorial University of Newfoundland)终身教授、博导。 1989年北京大学数学系本科毕业,1998年至2000年在复旦大学数学系硕士研究生, 2003年获得香港城市大学数学系博士学位。 2003年至2005年在加拿大York University 从事博士后研究工作。2005年开始在加拿大纽 芬兰纪念大学数学与统计部任助理教授,2009年破格升为副教授,2010年获得终身教职。 2015年升为正教授。 目前已在国际学术刊物上发表论文40多篇, 其中大多数论文在世界知名及顶级杂志上发表: 在应用数学顶级杂志--美国工业数学会刊SIAM系 列已发表8篇论文, 于2012年获得著名杂志 J. Differential Equations最佳引用奖。自博士毕业后, 应邀在四十多个国际和国内数学大会上作过邀请报告并参与组织多个国际学术会议。目前担任加拿大大西洋数学会(所)常务理事,和国际期刊 Boundary value problems编委。
Chunhua Ou
Department of Math and Stat Memorial University
St. Johns, Canada, A1C 5S7
Tel: (709) 864-8779
fax: (709) 864-3010
Chunhua Ou@mun.ca

