Results 1 to 10 of about 1,331,618 (275)

Analytical solution of a non-homogeneous boundary-value problem for the transport equation in an earth to air energy exchanger by initial base analysis method [PDF]

open access: yesMethodsX, 2022
In this paper, a one-dimensional time-dependent transport equation with inhomogeneous Dirichlet boundary conditions, often encountered in the study of an Earth to Air Energy Exchanger, is solved by a practical analytical method.
Landry Jean Pierre Gomat   +1 more
doaj   +2 more sources

Transport Equation for Small Systems and Nonadditive Entropy

open access: yesMathematics, 2022
The nonadditive entropy introduced by Tsallis in 1988 has been used in different fields and generalizes the Boltzmann entropy, extending the possibilities of the application of the statistical methods developed in the context of Mechanics.
Eugenio Megías   +2 more
doaj   +1 more source

Simulation for non-homogeneous transport equation by Nyström method

open access: yesBrazilian Journal of Radiation Sciences, 2021
In this work we solve numerically the one-dimensional transport equation with semi-reflective boundary conditions and non-homogeneous domain. The proposed methodology consists of applying the Nyström method in order to discretize the integral formulation
Luana Lazzari   +2 more
doaj   +1 more source

On the spectrum of discrete-ordinates neutron transport problems

open access: yesBrazilian Journal of Radiation Sciences, 2021
Over the last six decades, the discrete spectrum of the neutron transport operator has been widely studied. Important theoretical results can be found in the literature regarding the one-speed linear transport equation with anisotropic scattering.
Jesús Pérez Curbelo
doaj   +1 more source

High-Order Semi-Lagrangian Schemes for the Transport Equation on Icosahedron Spherical Grids

open access: yesAtmosphere, 2022
The transport process is an important part of the research of fluid dynamics, especially when it comes to tracer advection in the atmosphere or ocean dynamics. In this paper, a series of high-order semi-Lagrangian methods for the transport process on the
Fuqiang Lu   +4 more
doaj   +1 more source

Identification of the source for full parabolic equations

open access: yesMathematical Modelling and Analysis, 2021
In this work, we consider the problem of identifying the time independent source for full parabolic equations in Rn from noisy data. This is an ill-posed problem in the sense of Hadamard.
Guillermo Federico Umbricht
doaj   +1 more source

Transport theory and systems theory [PDF]

open access: yesNuclear Technology and Radiation Protection, 2005
The simulation of singular nonlinear transport equation is obtained via corresponding neutron or photon kinetic equation. The conditions for convergence of the non stationary transport process to ward the pure dif fusion across the equilibriums are ...
Rastović Danilo
doaj   +1 more source

Discretization of the 2D Convection–Diffusion Equation Using ‎Discrete Exterior Calculus [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2020
While the Discrete Exterior Calculus (DEC) discretization of the diffusive term of the Transport Equation is well understood, the DEC discretization of the convective term, as well as its stabilization, is an ongoing area of research.
Marco A. Noguez   +3 more
doaj   +1 more source

A survey of numerical schemes for transportation equation [PDF]

open access: yesE3S Web of Conferences, 2021
The convection-diffusion equation is a fundamental equation that exists widely. The convection-diffusion equation consists of two processes: diffusion and convection. The convection-diffusion equation can also be called drift-diffusion equaintion.
Yu Simin
doaj   +1 more source

Visual Features and Their Own Optical Flow

open access: yesFrontiers in Artificial Intelligence, 2021
Symmetries, invariances and conservation equations have always been an invaluable guide in Science to model natural phenomena through simple yet effective relations.
Alessandro Betti   +6 more
doaj   +1 more source

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