[HTML][HTML] Coefficient identification in a SIS fractional-order modelling of economic losses in the propagation of COVID-19

SG Georgiev, LG Vulkov - Journal of Computational Science, 2023 - Elsevier
A fractional-order SIS (Susceptible–Infectious–Susceptible) model with time-dependent
coefficients is used to analyse some effects of the novel coronavirus 2019 (COVID-19). This …

Numerical coefficient reconstruction of time-depending integer-and fractional-order SIR models for economic analysis of COVID-19

S Georgiev, L Vulkov - Mathematics, 2022 - mdpi.com
In the present work, a fractional temporal SIR model is considered. The total population is
divided into three compartments—susceptible, infected and removed individuals. It …

Differential and Time-Discrete SEIRS Models with Vaccination: Local Stability, Validation and Sensitivity Analysis Using Bulgarian COVID-19 Data

S Margenov, N Popivanov, I Ugrinova, T Hristov - Mathematics, 2023 - mdpi.com
Bulgaria has the lowest COVID-19 vaccination rate in the European Union and the second-
highest COVID-19 mortality rate in the world. That is why we think it is important better to …

Identification of COVID–19 dynamics and economic impact for a fractional SEIR model

SG Georgiev, LG Vulkov - AIP conference proceedings, 2022 - pubs.aip.org
In the context of the COVID–19, a great deal of attention is attracted in studying the infectious
disease from both academics and practitioners. One of the most powerful tools for …

Two Approaches for Identifying Epidemiological Parameters Illustrated with COVID-19 Data for Bulgaria

TT Marinov, RS Marinova, N Shelby - International Conference on Large …, 2023 - Springer
This work focuses on special numerical techniques for identifying time-dependent epidemics
parameters such as infection and recovery rates, and the corresponding basic and effective …