A nonlocal reaction-diffusion prey-predator model with free boundary

A nonlocal reaction-diffusion prey-predator model with free boundary
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具有自由边界的非局部反应扩散捕食者模型

DOI:
10.1016/j.camwa.2019.07.004
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发表时间:
2020-01
影响因子:
2.9
通讯作者:
李成林
李成林
中科院分区:
数学2区
文献类型:
--
作者:
李成林

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本文研究了一类具有自由边界的非局部反应扩散捕食者模型。该模型引入了时空风险指标R0p(T)作为阈值。证明了正解的整体存在性,并研究了正解的长时间行为。给出了捕食者消失并在新环境中生存的充分条件。此外,还建立了扩散-消失准则。结果表明,当捕食者和被捕食者的初始值R0p(0)和lt;1较小时,捕食者最终将消失而不能自我建立;当捕食者和被捕食者的初始值较大或t0和gt;0时捕食者将达到R0p(T0)>1。
This paper is concerned with a nonlocal reaction–diffusion prey–predator model with free boundary. The spatial–temporal risk index R 0 p (t) which is threshold value, is introduced for this model. The global existence of positive solutions is proved and the long-time behavior of positive solutions is investigated. The sufficient conditions are found for vanishing of predators and the establishment of themselves in new environment. Furthermore, the spreading–vanishing criteria are established. The results show that the predators will vanish finally and not establish themselves if the sizes of habitant and spreading coefficient are relatively small or the initial value of predators is also relatively small with R 0 p (0)< 1, and the predators will achieve if initial values of predators and preys are relatively big or R 0 p (t 0)> 1 for t 0> 0.
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DOI: 10.1016/j.anihpc.2013.11.004
发表时间: 2015-03
期刊: Annales de l&amp;#39;Institut Henri Poincare (C) Non Linear Analysis
影响因子: --
作者:
Du,Yihong;Liang,Xing
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