應(yīng)yl7703永利官網(wǎng)王賓國(guó)教授和張亮博士的邀請(qǐng)，加拿大紐芬蘭紀(jì)念大學(xué)（Memorial University of Newfoundland, Canada）袁沅教授將于2018年6月19日至6月25日訪問(wèn)蘭州大學(xué),期間將舉辦專(zhuān)題學(xué)術(shù)報(bào)告。
報(bào)告題目：A stage-structured model for fish stock with harvesting
報(bào)告摘要：In this talk, we propose a mathematical model for a single species fish
stock with three stages structure: juveniles, small adults and large adults with two harvesting strategies for mature classes, maturity and size selectivities. The purpose of the work is to investigate the dynamical behavior of the model and discuss the effect of harvesting.We identify the adult reproduction number $R_A$ for the model; obtain the local and global stability of the trivial equilibrium when $R_A<1 $; discuss the population persistence and existence of a unique positive equilibrium when $r_a>1$. Numerical simulations are provided to investigate the influence of harvesting functions, discuss the optimal harvesting rates and explore the effect of periodic coefficients on the dynamical system.
時(shí) 間：6月21日下午 3:00.
地 點(diǎn)：齊云樓911多媒體報(bào)告廳
歡迎廣大師生光臨!
袁沅教授簡(jiǎn)介
袁沅，紐芬蘭紀(jì)念大學(xué)數(shù)學(xué)與統(tǒng)計(jì)系終身教授，山西大學(xué)“百人計(jì)劃”。2002年畢業(yè)于University of Western Ontario并獲得博士學(xué)位，之后在University of Waterloo做博士后。袁教授主要研究領(lǐng)域?yàn)閿?shù)學(xué)生物學(xué)、數(shù)學(xué)生態(tài)學(xué)、非線性動(dòng)力系統(tǒng)、時(shí)滯微分方程等；已在J. Differential Equations, SIAM J. Appl. Math., SIAM J. Appl. Dyn. Syst., J. Math. BIol.等國(guó)際著名學(xué)術(shù)期刊上發(fā)表高水平學(xué)術(shù)論文50余篇，并兼任多個(gè)國(guó)際期刊編委、特邀編輯等。
甘肅省高校應(yīng)用數(shù)學(xué)與復(fù)雜系統(tǒng)省級(jí)重點(diǎn)實(shí)驗(yàn)室
yl7703永利官網(wǎng)
萃英學(xué)院
2018年6月19日
