Results 61 to 70 of about 849 (135)

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

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

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

Necrotic tumor growth: an analytic approach

, 2012
The present paper deals with a free boundary problem modeling the growth process of necrotic multi-layer tumors. We prove the existence of flat stationary solutions and determine the linearization of our model at such an equilibrium.
A Friedman, A Friedman, A Friedman, A Friedman, AH Kyle, D Gilbarg, F Zhou, H Byrne, J Escher, J Ward, JB Kim, Martin Kohlmann, MG Crandall, S Cui, W Müller-Klieser   +14 more
core   +1 more source

Khalouta transform and applications to Caputo-fractional differential equations

Frontiers in Applied Mathematics and Statistics
The paper aims to utilize an integral transform, specifically the Khalouta transform, an abstraction of various integral transforms, to address fractional differential equations using both Riemann-Liouville and Caputo fractional derivative.
Nikita Kumawat, Akanksha Shukla, Manvendra Narayan Mishra, Rahul Sharma, Ravi Shanker Dubey   +4 more
doaj   +1 more source

Global stability analysis and control of leptospirosis

Open Mathematics, 2016
The aim of this paper is to investigate the effectiveness and cost-effectiveness of leptospirosis control measures, preventive vaccination and treatment of infective humans that may curtail the disease transmission. For this, a mathematical model for the
Okosun Kazeem Oare, Mukamuri M., Makinde Daniel Oluwole   +2 more
doaj   +1 more source

Time-scale analysis non-local diffusion systems, applied to disease models

, 2020
The objective of the present paper is to use the well known Ross-Macdonald models as a prototype, incorporating spatial movements, identifying different times scales and proving a singular perturbation result using a system of local and non-local ...
Oliva, Sergio, Pereira, Marcone C., Sartori, Larissa M.   +2 more
core  

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

On a Cahn--Hilliard--Darcy system for tumour growth with solution dependent source terms

, 2018
We study the existence of weak solutions to a mixture model for tumour growth that consists of a Cahn--Hilliard--Darcy system coupled with an elliptic reaction-diffusion equation.
A Hawkins-Daarud, E DiBenedetto, H Garcke, H Garcke, H Garcke, H Garcke, J Jiang, J Simon, JS Lowengrub, JT Oden, M Dai, P Colli, S Bosia, S Frigeri, V Cristini, V Cristini, X Feng, X Wang, X Wang, Y Chen, Z Chen   +20 more
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The Performance of Discrete Models of Low Reynolds Number Swimmers

, 2015
Swimming by shape changes at low Reynolds number is widely used in biology and understanding how the efficiency of movement depends on the geometric pattern of shape changes is important to understand swimming of microorganisms and in designing low ...
Othmer, Hans G., Wang, Qixuan
core   +1 more source