應yl7703永利官網(wǎng)王賓國教授邀請,西安電子科技大學yl7703永利官網(wǎng)白振國副教授將于2022年1月15日-1月16日與我校有關師生舉行線上學術研討，其中1月15日舉行線上專題學術報告。.

報告題目:Dynamics of a periodic West Nile virus model with mosquito demographics.

時 間:1月15日（星期六）上午10:00

騰訊會議ID:897 567 642

報告摘要: We propose a time-delayed model of West Nile virus (WNv) with periodic extrinsic incubation period (EIP) and mosquito demographics including stage-structure, pair formation and intraspecific competition. We define two quantities R_minand R_maxfor mosquito population and the basic reproduction number R₀for our model. It is shown that the threshold dynamics are determined by these three parameters: (i) if R_max<1, the mosquito population will not survive; (ii) if R_min>1 and R₀<1, then WNv disease will go extinct; and if R_min>1 and R₀>1, then the disease will persist. Numerically, we simulate the long-term behaviors of solutions and reveal the influences of key model parameters on the disease transmission. A new finding is that R₀is non-monotone with respect to the fraction of the aquatic mosquitoes maturing into adult male mosquitoes, which can help us implement more effective control strategies. Besides we observe that using the time-averaged EIP has the possibility of underestimating the infection risk. This work is jointly with Zhiwen Zhang.

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白振國教授簡介:白振國，副教授，于2011年在西安交通大學獲得博士學位，2016年至2017年在加拿大紐芬蘭紀念大學做訪問學者。研究方向為生物數(shù)學及其應用動力系統(tǒng)，已在《SIAM J. Appl. Math.》、《J. Math. Biol.》、《Math. Biosci.》、《J. Theoret. Biol.》等雜志發(fā)表學術論文20余篇。目前主持國家自然科學基金面上項目和陜西省自然科學基金面上項目各一項。

甘肅應用數(shù)學中心

甘肅省高校應用數(shù)學與復雜系統(tǒng)省級重點實驗室

yl7703永利官網(wǎng)

萃英學院

2022年1月12日