Results 11 to 20 of about 560,074 (240)

Selecting a squeeze film damper model for solving problems of gas turbine engine rotor dynamics

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2017
Various standard mathematical squeeze film damper (SFD) models that can be applied for solving rotor dynamics problems of gas turbine engines (GTE) are presently available.
M. K. Leontiev, M. N. Kutakov
doaj   +1 more source

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

Typicality vs. probability in trajectory-based formulations of quantum mechanics [PDF]

open access: yes, 2007
Bohmian mechanics represents the universe as a set of paths with a probability measure defined on it. The way in which a mathematical model of this kind can explain the observed phenomena of the universe is examined in general.
Bruno Galvan   +16 more
core   +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

Task-Driven Adaptive Statistical Compressive Sensing of Gaussian Mixture Models [PDF]

open access: yes, 2012
A framework for adaptive and non-adaptive statistical compressive sensing is developed, where a statistical model replaces the standard sparsity model of classical compressive sensing.
Carin, Lawrence   +3 more
core   +3 more sources

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

Dynamics of COVID-19 epidemics: SEIR models underestimate peak infection rates and overestimate epidemic duration [PDF]

open access: yes, 2020
Compartment models of infectious diseases, such as SEIR, are being used extensively to model the COVID-19 epidemic. Transitions between compartments are modelled either as instantaneous rates in differential equations, or as transition probabilities in ...
Grant, Alastair
core   +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

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