一、题目:Local and global bifurcations in HIV modelswith celltocell
transmission and the involvement of effect
二、主讲人:徐衍聪
三、时间:2018年5月3日(周四),上午:10:00--10:40
四、地点:闻理园A4-218室
报告摘要:In this paper, we consider local and global bifurcations in two HIV models with cell-to-cell interaction. The difference between the two models lies in the inclusion or omission of the effect of involvement. Particular attention is focused on the effects due to the cell-to-cell
transmission. We investigate the local and global stability of equilibria of the two models and give a comparison. We also study Hopf bifurcation and apply normal form theory to determine the amplitudes and the periods of bifurcating limit cycles. It is shown that the involvement of uninfected cells plays an important role in the occurrence of oscillations due to Hopfbifurcation.It is found that the increasing cell-to-cell interaction could be the main cause of forcingHopfbifurcation to disappear,and thus eliminating the oscillating motions.
报告人简介:徐衍聪,杭州师范大学数学系教授,系主任,硕士生导师,华东师范大学应用数学博士,浙江大学博士后,美国(SIAM)工业与应用数学会员,美国数学评论评论员。先后访问美国布朗大学、日本京都大学、德国不莱梅大学,加拿大西安大略大学,约克大学等高校。目前主要从事动力系统分支理论、局部斑图分支及应用研究,主要包括:Dynamical Systems, Dynamics of Patterns, Nonlinear Wave,Homoclinic and Heteroclinic Phenomena等研究工作。先后在国内外数学杂志发表论文40余篇,主持国家自然科学基金面上项目、浙江省自然科学基金,日本GCOE项目及参与各类基金20余项。
参加国内外学术会议10多次,其中被美国布朗大学,伦斯勒理工学院,日本京都大学,德国不莱梅大学,加拿大西安大略大学及约克大学,香港城市大学等邀请作报告。
欢迎广大师生参加!
非线性分析研究所
理学院
2018年5月1日