Results 11 to 20 of about 42,948 (219)

Coexistence of multi-scroll chaotic attractors for a three-dimensional quadratic autonomous fractional system with non-local and non-singular kernel

open access: yesAlexandria Engineering Journal, 2021
In this paper, we present a numerical scheme and mathematical analysis for the famous three-dimensional quadratic autonomous self-govern system that happens to be chaotic with the coexistence of multi-scroll attractors.
D. Mathale   +2 more
doaj   +1 more source

Age- and bite-structured models for vector-borne diseases

open access: yesEpidemics, 2015
The biology and behaviour of biting insects is a vitally important aspect in the spread of vector-borne diseases. This paper aims to determine, through the use of mathematical models, what effect incorporating vector senescence and realistic feeding ...
K.S. Rock, D.A. Wood, M.J. Keeling
doaj   +1 more source

The Rate-Controlled Constrained-Equilibrium Approach to Far-From-Local-Equilibrium Thermodynamics

open access: yesEntropy, 2012
The Rate-Controlled Constrained-Equilibrium (RCCE) method for the description of the time-dependent behavior of dynamical systems in non-equilibrium states is a general, effective, physically based method for model order reduction that was originally ...
Hameed Metghalchi   +3 more
doaj   +1 more source

Eulerian-Lagrangian Analysis of Multiphase Flow in Urea Prilling Process with Phase Changing

open access: yesChemical Engineering Transactions, 2013
The objective of this work is the mathematical formulation of a prilling tower taking into account the solidification of the urea droplets, calculated by a shrinking unsolidified core model. The multiphase gas- liquid flow was modelled using the Eulerian-
G.A.N. Ricardo   +3 more
doaj   +1 more source

Exact modifications on a vacuum spacetime due to a gradient bumblebee field at its vacuum expectation value

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
This work belongs to the context of the standard-model extension, in which a Lorentz symmetry violation is induced by a bumblebee field as it acquires a nonzero vacuum expectation value.
F. P. Poulis, M. A. C. Soares
doaj   +1 more source

An Ising-type formulation of the six-vertex model

open access: yesNuclear Physics B, 2023
We show that the celebrated six-vertex model of statistical mechanics (along with its multistate generalizations) can be reformulated as an Ising-type model with only a two-spin interaction.
Vladimir V. Bazhanov, Sergey M. Sergeev
doaj   +1 more source

A new algebraic structure in the standard model of particle physics

open access: yesJournal of High Energy Physics, 2018
We introduce a new formulation of the real-spectral-triple formalism in non-commutative geometry (NCG): we explain its mathematical advantages and its success in capturing the structure of the standard model of particle physics. The idea, in brief, is to
Latham Boyle, Shane Farnsworth
doaj   +1 more source

Medical Image Denoising by Improved Kuan Filter

open access: yesAdvances in Electrical and Electronic Engineering, 2012
This paper focuses on the issue of speckle noise and its suppression. Firstly, the multiplicative speckle noise model and its mathematical formulation are introduced. Then, certain de-noising methods are described together with possible improvements.
Radek Benes, Kamil Riha
doaj   +1 more source

Sustainability-driven model for predicting compressive strength in concrete structures

open access: yesCogent Engineering
Over the past few decades, enhancing the sustainability of concrete structures has become a worldwide necessity. This study proposes a mathematical model for predicting compressive strength (CS), aiming to further the objective of designing sustainable ...
Fayez Moutassem, Mohamad Kharseh
doaj   +1 more source

Modelling rapid mass movements using the shallow water equations in Cartesian coordinates [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2015
We propose a new method to model rapid mass movements on complex topography using the shallow water equations in Cartesian coordinates. These equations are the widely used standard approximation for the flow of water in rivers and shallow lakes, but the ...
S. Hergarten, J. Robl
doaj   +1 more source

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