报告题目:Spatiotemporal patterns of a structured spruce budworm diffusive model
主讲人:舒洪英教授
时 间:2023年11月29日(周三)下午15:00
地 点:本部主楼B543
主办单位:必赢242net
主讲人简介:
舒红英,2010年获哈尔滨工业大学博士学位。2008年在加拿大阿尔伯塔大学留学两年,2011年至2014年先后在加拿大新不伦瑞克大学、加拿大瑞尔森大学和约克大学任AARMS博士后研究员。2014年至2018年任职同济大学特聘研究员,博士生导师。2018年至今任陕西师范大学特聘教授,博士生导师。2016年获上海市浦江人才计划。主持2项国家自然科学基金项目,1项上海市自然科学基金项目和1项加拿大科研基金项目。主要研究微分动力系统及其在生物数学上的应用,发表SCI收录论文40余篇,分别发表在J. Math. Pures Appl., SIAM Journal of Applied Mathematics, Journal of Differential Equations, Nonlinearity, Journal of Dynamics and Differential Equations, Journal of Mathematical Biology,Bulletin of Mathematical Biology 和Journal of Theoretical Biology等SCI期刊上。
摘要:
We formulate and analyze a general reaction-diffusion equation with delay, inspired by age-structured spruce budworm population dynamics with spatial diffusion by matured individuals. The model has its particular feature for bistability due to the incorporation of a nonlinear birth function (Ricker’s function) and a Holling type function of predation by birds. Here we establish some results about the global dynamics, in particular, the stability of and global Hopf bifurcation from the spatially homogeneous steady state when the maturation delay is taken as a bifurcation parameter. We also use a degree theoretical argument to identify intervals for the diffusion rate when the model system has a spatially heterogeneous steady state. Numerical experiments presented show interesting spatialtemporal patterns.