应兰州交通大学数理学院数学系杨赟瑞教授邀请,上海师范大学数理学院周鹏教授将于2023年12月7-8日与我院师生进行学术交流与研讨,并于12月8日举行线上学术报告,欢迎各位老师和研究生同学参加。
报告题目:Evolution of dispersal in advective environments: inflow vs outflow
报告摘要:We consider a single species model and a two-species competition model in one-dimensional open advective environments featured by an inflow (resp. outflow) of individuals at the upstream (resp. downstream) end as measured by a nonnegative parameter m (resp. n). The two species are assumed to follow the same population dynamics but have different random diffusion rates. Under certain mild conditions on m and n, we first determine clearly the global dynamics of the single species model in terms of critical habitat size or critical advection speed, and then further give a complete understanding on the global dynamics of the two species competition model. Our results suggest that in an open environment with mild inflow and outflow rates and with totally unfavorable boundary effect (outflow rate greater than inflow rate), ``faster diffusion can evolve", a different mechanism behind evolution of dispersal from that (``slower diffusion can evolve") observed by [Tang and Chen, 2020, JDE]. We also discuss other scenarios with different settings of m and n and propose problems that deserve future investigation.
时 间:2023年12月8日(星期五)晚上20:00-21:00
地 点:腾讯会议:510-575-692
专家简介:
周鹏, 上海师范大学数理学院数学系教授,博士生导师。2015年获上海交通大学理学博士。2015-2017年,在加拿大纽芬兰纪念大学从事 AARMS(北大西洋数学科学研究联盟)博士后研究。主要研究领域为微分方程、动力系统和生物数学,部分成果发表在J. Math. Pures Appl.、J. Funct. Anal.、SIAM J. Math. Anal.、J. Differential Equations、Calc. Var. Partial Differential Equations、SIAM J. Appl. Math.、SIAM J. Appl. Dyn. Syst. 等国际重要学术期刊。曾入选上海市东方学者特聘教授。目前主持国家基金委面上项目、上海市科委科技创新行动基础研究项目。
“天佑数学讲坛”由兰州交通大学数理学院发起创办,是数理学院数学系高层次常态化的学术交流平台。讲坛将不定期邀请国内外知名学者围绕数学国际前沿动态展开学术交流与探讨,通过学术报告、小型研讨会等形式为数学系师生提供向国内外知名学者学习的机会,以便能够及时准确地了解数学领域的前沿学术信息,进一步提升数学系师生的学术视野及科研水平。
数理学院
2023年12月6日