Results 51 to 60 of about 873 (150)

An Optimal Control Study for a Two‐Strain SEIR Epidemic Model With Saturated Incidence Rates and Treatment

Discrete Dynamics in Nature and Society, Volume 2025, Issue 1, 2025.
This work will study an optimal control problem describing the two‐strain SEIR epidemic model. The model studied is in the form of six nonlinear differential equations illustrating the dynamics of the susceptible and the exposed, the infected, and the recovered individuals.
Karam Allali, Mouhamadou A. M. T. Balde, Babacar M. Ndiaye, Ahmed Ezzat Matouk   +3 more
wiley   +1 more source

Stability of a secondary dengue viral infection model with multi-target cells

Alexandria Engineering Journal, 2022
Dengue is one of the vector-borne diseases spread in most parts of the world. The number of infected individuals is increased each year. This paper proposes a mathematical model describing the secondary dengue viral infection in micro-environment.
M.A. Alshaikh, E.Kh. Elnahary, A.M. Elaiw   +2 more
doaj   +1 more source

The Impact of Intervention Strategies on the Dissemination of Monkeypox Utilizing Fractional Differential Equations

Journal of Mathematics, Volume 2025, Issue 1, 2025.
In this study, we develop a compartmental mathematical model to offer a thorough understanding of the dynamics of monkeypox viral transmission. We examine the sensitivity of the epidemic model to the fundamental reproduction number (R0). We also utilize an expanded Euler technique to scrutinize the dynamics of monkeypox transmission between humans and ...
M. Manivel, A. Venkatesh, Malesela Kekana, Francisco J. Garcia-Pacheco   +3 more
wiley   +1 more source

Dengue disease, basic reproduction number and control [PDF]

, 2011
Dengue is one of the major international public health concerns. Although progress is underway, developing a vaccine against the disease is challenging. Thus, the main approach to fight the disease is vector control.
Alan Zinober, Braga I. A., Campbell S. L., Christophers S. R., Delfim F. M. Torres, Helena Sofia Rodrigues, M. Teresa T. Monteiro, Natal D., Nishiura H., Rodrigues H. S.   +9 more
core   +4 more sources

Effects of anisotropic interactions on the structure of animal groups [PDF]

, 2010
This paper proposes an agent-based model which reproduces different structures of animal groups. The shape and structure of the group is the effect of simple interaction rules among individuals: each animal deploys itself depending on the position of a ...
A Huth, A Mogilner, A Nathan, Benedetto Piccoli, C Cutts, CK Hemelrijk, D Liberzon, D Swaroop, DJT Sumpter, Emiliano Cristiani, F Cucker, FH Heppner, FR Hainsworth, G Grégoire, H Kunz, H Shi, H Weimerskirch, HG Tanner, I Aoki, I Giardina, ID Couzin, ID Couzin, JH Tien, JK Parrish, JR Speakman, K Warburton, LL Gould, M Ballerini, M Ballerini, P Frasca, P Seiler, P Seiler, Paolo Frasca, R Lukeman, S Gueron, T Vicsek, WD Hamilton, Y Chuang, Y Inada, YX Li   +39 more
core   +1 more source

Sets of double and triple weights of trees

, 2011
Let T be a weighted tree with n leaves. Let D_{i,j} be the distance between the leaves i and j. Let D_{i,j,k}= (D_{i,j} + D_{j,k} +D_{i,k})/2. We will call such numbers "triple weights" of the tree.
Rubei, Elena
core   +1 more source

Optimal control and bifurcation analysis of SEIHR model for COVID-19 with vaccination strategies and mask efficiency

Computational and Mathematical Biophysics
In this article, we present a susceptible, exposed, infected, hospitalized and recovered compartmental model for COVID-19 with vaccination strategies and mask efficiency. Initially, we established the positivity and boundedness of the solutions to ensure
Muthu Poosan Moopanar, Kumar Anagandula Praveen   +1 more
doaj   +1 more source

Approximation operators based on preconcepts

Open Mathematics, 2020
Using the notion of preconcept, we generalize Pawlak’s approximation operators from a one-dimensional space to a two-dimensional space in a formal context.
Wang Gang, Mao Hua
doaj   +1 more source

Global periodic solutions in a plankton-fish interaction model with toxication delay

Nonlinear Engineering, 2018
In this paper, a plankton-fish interaction model is proposed and analyzed with the help of delay differential equations. Firstly, the elementary dynamical properties of the system in the absence of time delay is discussed.
Sharma Amit
doaj   +1 more source

An Optimal Control Analysis of Dengue Fever

InPrime, 2023
Dengue fever is one of the most infectious diseases in the world, according to data issued by the World Health Organization in 2014. It is responsible for a huge number of deaths each year around the world, particularly in tropical nations.
Nur Ilmayasinta, Rahma Febriyanti, Rayinda Aseti Prafianti, Nabila Syarifah Zakiyah   +3 more
doaj   +1 more source