报告承办单位 : pg电子官网入口平台
报告 题目 : 赠送彩金的app平台是什么赠送彩金的app平台是什么赠送彩金的app平台是什么与赠送彩金的app平台是什么赠送彩金的app平台是什么赠送彩金的app平台是什么赠送彩金的app平台是什么
报告人姓名 : Yuan Yuan ( 赠送彩金的app平台是什么）
报告人所在单位 : 加拿大纽芬兰纪念大学
报告人职称 : 教授，博士生导师
报告时间 : 北京时间 2021 年 5 月 27 日（星期四）上午 8 ： 30-9:30
腾讯会议号码 : 688 676 543
报告人简介 ： 赠送彩金的app平台是什么教授 1984 年于武汉大学获得学士学位， 1988 年于中南大学获得硕士学位， 2002 年于加拿大西安大略大学（ University of Western Ontario ）获得博士学位。 2002 年荣获 NSERC （加拿大国家自然科学基金）资助在滑铁卢大学 (University of Waterloo) 做短暂博士后研究，随后于 2002 年 9 月起受聘于加拿大纽芬兰纪念大学（ Memorial University of Newfoundland ）至今，现为该校数学与统计系终身正教授和博士生导师。袁教授主要研究方向包括非线性赠送彩金的app平台是什么系统的稳定性及分支赠送彩金的app平台是什么、时滞微分方程及其在神经网络和生物数学等的应用、微分方程的符号及数值计算方法。现已在 SIAM Journal of Applied Mathematics, Journal of Mathematical Biology, Journal of Mathematical Analysis and Applications, Journal of Differential Equations, Nonlinear Analysis: Real World Applications, SIAM Journal on Applied Dynamical Systems 等主要应用数学及生物数学杂志发表论文六十多篇。研究成果深受同行好评及引用，研究一直受到加拿大 NSERC 的资助。
摘要： We propose two compartment models to study the disease transmission dynamics, then apply the models to the current COVID-19 pandemic and to explore the potential impact of the interventions, and try to provide insights into the future health care demand. Starting with an SEAIQR model by combining the e ff ect from exposure, asymptomatic and quarantine, then extending the model to the one with ages below and above 65 years old, and classify the infectious individuals according to their severity, we focus our analysis on each model with and without vital dynamics. In the models with vital dynamics, we study the dynamical properties including the global stability of the disease free equilibrium and the existence of endemic equilibrium, with respect to the basic reproduction number. Whereas in the models without vital dynamics, we address the fi nal epidemic size rigorously, which is one of
the common but di ffi cult questions regarding an epidemic. Finally, we apply our models to estimate the basic reproduction number and the fi nal epidemic size of disease by using the data of COVID-19 conrmed cases in Canada and Newfoundland & Labrador province.