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arXiv 2005.13516q-bio.PEq-bio.QM
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基于交叉验证的遗传算法及其在阿尔及利亚COVID-19早期扩散中的应用

Genetic algorithm with cross validation-based epidemic model and application to early diffusion of COVID-19 in Algeria

Mohamed Taha Rouabah, Abdellah Tounsi, Nacer Eddine Belaloui

摘要:

提出了一种利用遗传算法和交叉验证方法优化的动态传染病模型,以克服过拟合问题。应用交叉验证过程,以便将可用数据分成用于拟合算法参数的训练子集和用于验证的较小子集。这一过程在意大利、西班牙、德国和韩国进行了测试,然后应用于阿尔及利亚。有趣的是,我们的研究揭示了训练样本的大小和遗传算法所需的代数之间的反比关系。此外,在这项工作中提出的增强的房室模型被证明是一个可靠的工具,以估计关键的流行病参数和易感人群的不可测量的无症状感染的部分,以建立现实的临近预报和预测的流行病的演变。该模型用于研究2020年2月25日至5月24日期间阿尔及利亚的COVID-19疫情动态。在疫情发生3个月后的5月24日,估计基本繁殖数和有效繁殖数分别为3.78(95% CI 3.033-4.53)和0.651(95% CI 0.539-0.761)。还计算了疾病发生率、CFR和IFR。为这项研究的目的开发的数值程序是公开的复制和进一步使用。

英文摘要:

A dynamical epidemic model optimized using genetic algorithm and cross validation method to overcome the overfitting problem is proposed. The cross validation procedure is applied so that available data are split into a training subset used to fit the algorithm's parameters, and a smaller subset used for validation. This process is tested on the countries of Italy, Spain, Germany and South Korea before being applied to Algeria. Interestingly, our study reveals an inverse relationship between the size of the training sample and the number of generations required in the genetic algorithm. Moreover, the enhanced compartmental model presented in this work is proven to be a reliable tool to estimate key epidemic parameters and non-measurable asymptomatic infected portion of the susceptible population in order to establish realistic nowcast and forecast of epidemic's evolution. The model is employed to study the COVID-19 outbreak dynamics in Algeria between February 25th and May 24th, 2020. The basic reproduction number and effective reproduction number on May 24th, after three months of the outbreak, are estimated to be 3.78 (95% CI 3.033-4.53) and 0.651 (95% CI 0.539-0.761) respectively. Disease incidence, CFR and IFR are also calculated. Numerical programs developed for the purpose of this study are made publicly accessible for reproduction and further use.

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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