应数学系蒋卫华教授邀请，加拿大约克大学（York University）数学和统计系朱怀平教授将于近日访问公司理学院数学系，并进行讲学活动，欢迎感兴趣的师生参加！ 

报告题目：Oscillations and driving mechanism in models of West Nile virus with time delay

报告时间：2015年8月11日下午16：00--17:00

报告地点：格物楼503

报告摘要：West Nile virus is a typical vector-borne disease which is transmitted to humans or other animals by culex mosquitoes. For the virus, avian birds serve as amplification hosts, yet vector mosquitoes play a critical role in the transmission and spread of the virus. To investigate the role of vector mosquitoes and the transmission dynamics of West Nile virus, I will present two models of delay differential equations with different demographics and similar standard incidence functions for vector mosquitoes and host birds. Bifurcation and dynamics analysis suggest that the incidental interaction between mosquitoes and birds would not cause sustainable oscillations (multiple peaks) in the model systems, only the population of vector mosquitoes is the fundamental driving factor for the oscillation in disease transmission when consider the impact of temperature. This talk is based on two papers in the reference.
     报告人简介：朱怀平，加拿大约克大学（York University）数学和统计系教授。2000年获加拿大蒙特利尔大学博士学位，主要研究领域为动力系统分支理论和应用、希尔伯特第十六问题、生物数学的建模和分析。朱怀平教授长期着力于种群动力学、传染病动力学、气候变化模拟和影响、以及蚊虫和西尼罗病毒风险实时预报等工作。