杭州师范大学宋永利教授学术报告
报告题目: Complex dynamics induced by the joint effect of nonlocal delay and diffusion
报 告 人:宋永利 教授
负 责 人:王小利
报告时间:2026年10月16日(星期五)下午15:00-16:00
报告地点:数学大楼915报告厅
参加人员:教师、研究生、本科生
摘要:In this talk, the influence of the distributed delay (nonlocality in time) and nonlocal delay (nonlocality in space) on the stability and spatiotemporal dynamics in the memory-based diffusion populations are discussed. For the distributed delay, it has been shown that the weak kernel does not affect the stability of this positive constant steady state, but the strong kernel can lead to the rich dynamics. For the nonlocal delay, it has been shown that when movement driven by the memory-based diffusion is slow, the memory does not the stability of positive homogeneous steady state, but when the movement driven by the memory-based diffusion is fast, the small memory delay (no matter how small it is) can destabilize the stability, however the large memory can stabilize the stability. A series of Turing bifurcation, Hopf bifurcation, Turing-Turing bifurcation and double Hopf bifurcation are explicitly determined.
报告人简介:宋永利,杭州师范大学数学学院教授、博雅学者、教育部新世纪优秀人才、浙江省高等学校“钱江学者”特聘教授、中国生物数学会理事。 主要从事微分方程定性理论、无穷维动力系统的分支理论、斑图动力学的研究工作,在动力系统领域的国际权威期刊SIAM J. Appl. Dyn. Sys.、 Nonlinearity、J. Diff. Equ.、 J. Nonl. Sci.、 SIAM J. Appl. Math、J. Diff. Dyn. Sys.、Stud. App. Math.、 IEEE Tran. Neu. Net.Lear. Sys.、Physica D等发表学术论文100余篇。2014年起连年入选中国高被引学者榜单(数学类)。 2022年起连年入选斯坦福大学发布的全球前2%顶尖科学家榜单。曾主持多项国家自然基金和省部级重点项目的研究工作。2018年入选浙江省151人才工程第一层次培养人选。 先后荣获“杭州市优秀教师”、“浙江省优秀数学教师”、“杭州师范大学优秀研究生导师”和“浙江省优秀研究生导师”等称号。研究成果获威海市科学技术一等奖和浙江省自然科学三等奖。