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arXiv 2103.09178q-bio.PEphysics.bio-ph
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通过Monte Carlo方法模拟COVID-19疾病传播的连续时间随机过程以及与确定性模型的比较

Continuous-time stochastic processes for the spread of COVID-19 disease simulated via a Monte Carlo approach and comparison with deterministic models

Fabiana Calleri, Giovanni Nastasi, Vittorio Romano

摘要:

提出两个随机模型来描述COVID-19大流行的演变。在第一个模型中,将人群分为四个区室:易感$S$、感染的$I$、去除的$R$和死亡的人$D$。为了有一个交叉验证,这样一个模型的确定性版本也被设计出来,它是由一个系统的常微分方程的延迟。在第二个随机模型中,增加了另外两个区室:无症状个体的类别$A$和隔离感染者的类别$L$。社会距离措施等影响很容易包括在内,并分析其后果。用蒙特卡罗模拟得到了数值解。定量预测提供了这可能是有用的政治措施的评估,例如,所获得的结果表明,基于群体免疫的战略是太危险了。

英文摘要:

Two stochastic models are proposed to describe the evolution of the COVID-19 pandemic. In the first model the population is partitioned into four compartments: susceptible $S$, infected $I$, removed $R$ and dead people $D$. In order to have a cross validation, a deterministic version of such a model is also devised which is represented by a system of ordinary differential equations with delays. In the second stochastic model two further compartments are added: the class $A$ of asymptomatic individuals and the class $L$ of isolated infected people. Effects such as social distancing measures are easily included and the consequences are analyzed. Numerical solutions are obtained with Monte Carlo simulations. Quantitative predictions are provided which can be useful for the evaluation of political measures, e.g. the obtained results suggest that strategies based on herd immunity are too risky.

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。

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