Results 31 to 40 of about 647,949 (285)

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

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

Outline of a Generalization and a Reinterpretation of Quantum Mechanics Recovering Objectivity

open access: yes, 2015
The ESR model has been recently proposed in several papers to offer a possible solution of the problems raising from the nonobjectivity of physical properties in quantum mechanics (QM) (mainly the objectification problem of the quantum theory of ...
Garola, Claudio   +2 more
core   +1 more source

Coupling Nonlinear Sigma-Matter to Yang-Mills Fields: Symmetry Breaking Patterns [PDF]

open access: yes, 2008
We extend the traditional formulation of Gauge Field Theory by incorporating the (non-Abelian) gauge group parameters (traditionally simple spectators) as new dynamical (nonlinear-sigma-model-type) fields.
Aldaya V   +9 more
core   +5 more sources

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

Constructing Parsimonious Analytic Models for Dynamic Systems via Symbolic Regression

open access: yes, 2020
Developing mathematical models of dynamic systems is central to many disciplines of engineering and science. Models facilitate simulations, analysis of the system's behavior, decision making and design of automatic control algorithms.
Ancona, Nicola   +3 more
core   +1 more source

Finite element surface registration incorporating curvature, volume preservation, and statistical model information [PDF]

open access: yes, 2013
We present a novel method for nonrigid registration of 3D surfaces and images. The method can be used to register surfaces by means of their distance images, or to register medical images directly.
Albrecht, Thomas   +3 more
core   +4 more sources

Three-Hilbert-Space Formulation of Quantum Mechanics [PDF]

open access: yes, 2009
In paper [Znojil M., Phys. Rev. D 78 (2008), 085003, 5 pages, arXiv:0809.2874] the two-Hilbert-space (2HS, a.k.a. cryptohermitian) formulation of Quantum Mechanics has been revisited. In the present continuation of this study (with the spaces in question
Znojil, Miloslav
core   +5 more sources

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