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投稿时间:2017-09-27
投稿时间:2017-09-27
中文摘要: 在生态学中,种群向新领域入侵时,生存区域的边界是随时间变动的边界(被称为自由边界)。采用自由边界问题来描述种群的传播,其中自由边界满足经典的Stefan自由边界条件,方程为反应扩散方程组,改进了以往的竞争模型。利用比较原理和上下解的方法研究了解的渐近行为,分析了强竞争和弱竞争时种群的传播,结果表明,无论种群初始密度多小,种群都会生存且生存区域不变。
Abstract:In ecology, the survival area of the invasive species is moving with time(known as the free boundary). The free boundary problem is used to describe the spreading of the species, where the free boundary satisfies the Stefan free boundary condition, and the reaction diffusion equations are used. This model has improved some competition model. By means of the comparison principle and upper-lower solutions, the asymptotic behavior of solutions are studied and the spreading of the species in the cases of the strong competition and weak competition is analyzed.
文章编号:20192019 中图分类号:O175 文献标志码:
基金项目:国家自然科学基金(11701359)。
作者 | 单位 | |
蔡静静 | 上海电力学院 数理学院, 上海 201300 | cjjing1983@163.com |
周诗雨 | 上海电力学院 数理学院, 上海 201300 |
引用文本:
蔡静静,周诗雨.带有自由边界条件的反应扩散方程描述的竞争模型[J].上海电力大学学报,2019,35(2):197-200.
CAI Jingjing,ZHOU Shiyu.A Competition Model of Reaction Diffusion Equation with a Free Boundary Condition[J].Journal of Shanghai University of Electric Power,2019,35(2):197-200.
蔡静静,周诗雨.带有自由边界条件的反应扩散方程描述的竞争模型[J].上海电力大学学报,2019,35(2):197-200.
CAI Jingjing,ZHOU Shiyu.A Competition Model of Reaction Diffusion Equation with a Free Boundary Condition[J].Journal of Shanghai University of Electric Power,2019,35(2):197-200.