arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2003.08219math.DSq-bio.PE
收藏

具有分布时滞和多维Lévy跳的随机SIR流行病模型的长时间行为

The long-time behaviour of a stochastic SIR epidemic model with distributed delay and multidimensional Lévy jumps

Driss Kiouach, Yassine Sabbar

摘要:

最近,新出现的流行病如COVID-19及其变种需要预测性数学模型来实施适当的应对措施,以限制其对社会的负面和深远影响。SIR(Susceptible-RemovedRemoved)系统是一个简单的数学公式,用于模拟许多传染病的传播。本文报道了新的理论和分析结果的干扰版本的SIR模型与伽玛分布延迟。值得注意的是,我们的流行病模型是由伊藤-L 'evy随机微分方程,以模拟突发和意外的外部现象。利用一些新的和改进的数学方法,研究了扰动时滞模型的长期特性。在此范围内,我们给出了两个有趣的渐近性质的充分条件:灭绝和持续的流行病。其中最有趣的一个结果是,该随机模型的动力学与白噪声和L 'evy跳跃的强度密切相关,这可以让我们很好地了解在一些突发情况下流行病的演变。我们的工作补充了一些以前的研究结果,并提供了一种新的方法来预测和分析的动态行为的流行病与分布延迟。为了说明的目的,数值例子来检查理论研究

英文摘要:

Recently, emerging epidemics like COVID-19 and its variants require predictive mathematical models to implement suitable responses in order to limit their negative and profound impact on society. The SIR (Susceptible-InfectedRemoved) system is a straightforward mathematical formulation to model the dissemination of many infectious diseases. The present paper reports novel theoretical and analytical results for a perturbed version of an SIR model with Gamma-distributed delay. Notably, our epidemic model is represented by Itô-L'evy stochastic differential equations in order to simulate sudden and unexpected external phenomena. By using some new and ameliorated mathematical approaches, we study the long-run characteristics of the perturbed delayed model. Within this scope, we give sufficient conditions for two interesting asymptotic proprieties: extinction and persistence of the epidemic. One of the most interesting results is that the dynamics of the stochastic model are closely related to the intensities of white noises and L'evy jumps, which can give us a good insight into the evolution of the epidemic in some unexpected situations. Our work complements the results of some previous investigations and provides a new approach to predict and analyze the dynamic behavior of epidemics with distributed delay. For illustrative purposes, numerical examples are presented for checking the theoretical study

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑