Results 11 to 20 of about 14,206,160 (302)

A stochastic differential equation SIS epidemic model [PDF]

, 2011
In this paper we extend the classical susceptible-infected-susceptible epidemic model from a deterministic framework to a stochastic one and formulate it as a stochastic differential equation (SDE) for the number of infectious individuals $I(t)$. We then
Hu, L., Greenhalgh, David, Mao, Xuerong, Gray, Alison, Pan, Jiafeng   +4 more
core   +4 more sources

Parameter estimation for the stochastic SIS epidemic model [PDF]

, 2014
In this paper we estimate the parameters in the stochastic SIS epidemic model by using pseudo-maximum likelihood estimation (pseudo-MLE) and least squares estimation.
Greenhalgh, David, Mao, Xuerong, Gray, Alison, Pan, Jiafeng   +3 more
core   +4 more sources

Supply Chain Risk Diffusion in Partially Mapping Double-Layer Hypernetworks

Entropy, 2023
The impact of COVID-19 is global, and uncertain information will affect product quality and worker efficiency in the complex supply chain network, thus bringing risks.
Ping Yu, Zhiping Wang, Ya’nan Sun, Peiwen Wang   +3 more
doaj   +1 more source

A process of rumour scotching on finite populations [PDF]

Royal Society Open Science, 2015
Rumour spreading is a ubiquitous phenomenon in social and technological networks. Traditional models consider that the rumour is propagated by pairwise interactions between spreaders and ignorants.
Guilherme Ferraz de Arruda, Elcio Lebensztayn, Francisco A. Rodrigues, Pablo Martín Rodríguez   +3 more
doaj   +1 more source

Impact of war on COVID-19 pandemic in Ukraine: the simulation study

Радіоелектронні і комп'ютерні системи, 2022
The COVID-19 pandemic has posed a challenge to public health systems worldwide. As of March 2022, almost 500 million cases have been reported worldwide. More than 6.2 million people died.
Dmytro Chumachenko, Pavlo Pyrohov, Ievgen Meniailov, Tetyana Chumachenko   +3 more
doaj   +1 more source

A dynamic microsimulation model for epidemics [PDF]

Social Science & Medicine, 2021
Funder: The Alan Turing ...
Fiona Spooner, Jesse F. Abrams, Karyn Morrissey, Gavin Shaddick, Michael Batty, Richard Milton, Adam Dennett, Nik Lomax, Nick Malleson, Natalie Nelissen, Alex Coleman, Jamil Nur, Ying Jin, Rory Greig, Charlie Shenton, Mark Birkin   +15 more
openaire   +4 more sources

Modeling Vaccine Efficacy for COVID-19 Outbreak in New York City

Biology, 2022
In this article we study the efficacy of vaccination in epidemiological reconstructions of COVID-19 epidemics from reported cases data. Given an epidemiological model, we developed in previous studies a method that allowed the computation of an ...
Jacques Demongeot, Quentin Griette, Pierre Magal, Glenn Webb   +3 more
doaj   +1 more source

Predictive model of COVID-19 epidemic process based on neural network

Радіоелектронні і комп'ютерні системи, 2022
The COVID-19 pandemic, which has been going on for almost three years, has shown that public health systems are not ready for such a challenge. Measures taken by governments in the healthcare sector in the context of a sharp increase in the pressure on ...
Serhii Krivtsov, Ievgen Meniailov, Kseniia Bazilevych, Dmytro Chumachenko   +3 more
doaj   +1 more source

Integrating stochasticity and network structure into an epidemic model [PDF]

, 2009
While the foundations of modern epidemiology are based upon deterministic models with homogeneous mixing, it is being increasingly realized that both spatial structure and stochasticity play major roles in shaping epidemic dynamics.
Dangerfield, C. E., Ross, Joshua V., Dangerfield, C., Keeling, Matthew James, Ross, J.   +4 more
core   +1 more source

Dynamics of Fractional-Order Epidemic Models with General Nonlinear Incidence Rate and Time-Delay

Mathematics, 2021
In this paper, we study the dynamics of a fractional-order epidemic model with general nonlinear incidence rate functionals and time-delay. We investigate the local and global stability of the steady-states.
Ardak Kashkynbayev, Fathalla A. Rihan
doaj   +1 more source