具有竞争机制的觅食者-掠夺者模型解的全局有界性
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重庆市自然科学基金面上项目(No.CSTB2024NSCQ-MSX0220)


Global Boundedness of Solutions for Forager-Predator Models with Competitive Mechanism
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    摘要:

    为研究具有竞争机制的觅食者-掠夺者模型解的全局有界性,通过应用Neumann热半群理论和Hlder不等式、Gagliardo-Nirenberg不等式、Young不等式、内插不等式等一系列经典不等式,逐步建立了模型解的先验估计。首先,利用抛物比较原理和分部积分法,得到了食物资源浓度的有界性估计;然后,结合Neumann热半群的正则化性质和相关不等式,进一步得到了觅食者和掠夺者种群密度的有界性估计;最后,通过构造能量泛函和应用Moser-Alikakos迭代方法证明了当初值和参数在一定条件下,模型存在唯一的全局有界经典解。

    Abstract:

    To investigate the global boundedness of solutions for a foraging-predator model with competition mechanisms, Neumann heat semigroup theory and a series of classical inequalities including Hlder inequality, Gagliardo-Nirenberg inequality, Young inequality, and interpolation inequality were systematically applied to progressively establish prior estimates for the model solutions. First, boundedness estimates for the food resource concentration were derived through the parabolic comparison principle and integration by parts. Subsequently, combining the regularization properties of the Neumann heat semigroup with relevant inequalities, boundedness estimates for the population densities of both foragers and predators were further obtained. Finally, by constructing energy functionals and applying the Moser-Alikakos iteration method, it was proven that under certain initial value and parameter conditions, the model admits a unique globally bounded classical solution.

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陈欢,吴春.具有竞争机制的觅食者-掠夺者模型解的全局有界性[J].重庆师范大学学报自然科学版,2025,42(3):103-111

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  • 在线发布日期: 2025-07-16