活動(dòng)時(shí)間:10:30
活動(dòng)日期:2018-10-24
地點(diǎn):長(zhǎng)安校區(qū) 文津樓1506
主辦單位:數(shù)學(xué)與信息科學(xué)學(xué)院
講座題目1:Dynamics of a Simple Two-Patch Model for Interacting Wild and Sterile Mosquitoes
講座時(shí)間:10:30
報(bào)告人:李佳 教授
講座內(nèi)容簡(jiǎn)介:
Sterile insect technique is one of the effective biological measures in mosquitoes control. Since mosquitoes fly around as we release sterile mosquitoes, the mosquito dispersal affects the effectiveness of the releases. To study the impact of mosquito dispersal, we formulate a simple two-patch model where sterile mosquitoes are only released in one of the two patches. We establish the threshold of releases such that the wild mosquitoes are either wiped out or coexist with sterile mosquitoes. We then investigate the existence and stability of coexistent positive equilibria. Numerical examples are also provided.
講座人簡(jiǎn)介:
李佳,1987年于美國(guó)田納西大學(xué)獲博士學(xué)位,2000年任美國(guó)阿拉巴馬大學(xué)漢斯維爾校區(qū)數(shù)學(xué)系教授。主要研究領(lǐng)域:動(dòng)力系統(tǒng),微分方程,差分方程,種群動(dòng)力學(xué),傳染病動(dòng)力學(xué),數(shù)學(xué)生態(tài)學(xué),環(huán)境數(shù)學(xué)建模與分析等,在SCI源期刊發(fā)表論文80余篇, 獲得多項(xiàng)美國(guó)國(guó)家科學(xué)基金項(xiàng)目,組織和參與多次有關(guān)生物數(shù)學(xué)方面的國(guó)際學(xué)術(shù)會(huì)議,具有較高的國(guó)際影響力。任Mathematical Biology and Engineering、Journal of Biological Dynamics、Annuals of Differential Equations、Journal of Mathematics and Computer Science等SCI源期刊副主編,是國(guó)際生物數(shù)學(xué)領(lǐng)域有重要影響的專(zhuān)家。
講座題目2:Dynamics of an HBV/HCV infection model with intracellular delay and cell proliferation
講座時(shí)間:11:10
報(bào)告人:李建全 教授
講座內(nèi)容簡(jiǎn)介:
A new mathematical model of hepatitis B/C virus (HBV/HCV) infection which incorporates the proliferation of healthy hepatocyte cells and the latent period of infected hepatocyte cells is proposed and studied. The dynamics is analyzed via Pontryagin’s method and a newly proposed alternative geometric stability switch criterion. Sharp conditions ensuring stability of the infection persistent equilibrium are derived by applying Pontryagin’s method. Using the intracellular delay as the bifurcation parameter and applying an alternative geometric stability switch criterion, we show that the HBV/HCV infection model undergoes stability switches. Furthermore, numerical simulations illustrate that the intra- cellular delay can induce complex dynamics such as persistence bubbles and chaos.
講座人簡(jiǎn)介:
李建全,陜西科技大學(xué)文理學(xué)院,教授。1986年畢業(yè)于太原工業(yè)大學(xué)數(shù)力系應(yīng)用數(shù)學(xué)專(zhuān)業(yè),獲理學(xué)學(xué)士學(xué)位;1989年畢業(yè)于西安交通大學(xué)數(shù)學(xué)系應(yīng)用數(shù)學(xué)專(zhuān)業(yè),獲理學(xué)碩士學(xué)位;2004年畢業(yè)于西安交通大學(xué)理學(xué)院應(yīng)用數(shù)學(xué)專(zhuān)業(yè),獲理學(xué)博士學(xué)位;2007年12月于西安交通大學(xué)控制科學(xué)與工程博士后流動(dòng)站出站;2009年4月應(yīng)邀訪問(wèn)意大利那不勒斯大學(xué);1989年-2017年任職于空軍工程大學(xué)?,F(xiàn)主要從事種群生態(tài)動(dòng)力學(xué)、傳染病動(dòng)力學(xué)、病毒動(dòng)力學(xué)的數(shù)學(xué)建模與研究,發(fā)表相關(guān)學(xué)術(shù)論文100 余篇,其中被SCI 收錄40余篇。所參與的研究項(xiàng)目分別于2002 年和2006 年獲教育部高等學(xué)校科學(xué)技術(shù)獎(jiǎng)自然科學(xué)二等獎(jiǎng)。曾主持國(guó)家博士后科學(xué)基金一項(xiàng),主持國(guó)家自然科學(xué)基金項(xiàng)目?jī)身?xiàng),參兩項(xiàng)與國(guó)家十二五重大專(zhuān)項(xiàng)研究項(xiàng)目。博士學(xué)位論文獲西安交通大學(xué)和陜西省優(yōu)秀博士學(xué)位論文。2009 年與他人合作在World Scientific 出版了英文版專(zhuān)著《Dynamical Modeling and Analysis of Epidemics》。