Results 31 to 40 of about 6,511,507 (299)

Non-Linear Langevin and Fractional Fokker-Planck Equations for Anomalous Diffusion by Levy Stable Processes [PDF]

open access: yes, 2018
The~numerical solutions to a non-linear Fractional Fokker--Planck (FFP) equation are studied estimating the generalized diffusion coefficients. The~aim is to model anomalous diffusion using an FFP description with fractional velocity derivatives and ...
Anderson, Johan   +2 more
core   +2 more sources

Asymptotic behaviour of flows on reducible networks

open access: yesNetworks and Heterogeneous Media, 2014
In this paper we extend some of the previous results for a system of transport equations on a closed network. We consider the Cauchy problem for a flow on a reducible network; that is, a network represented by a diagraph which is not strongly connected ...
Jacek Banasiak, Proscovia Namayanja
doaj   +1 more source

One-dimensional aggregation equation after blow up: Existence, uniqueness and numerical simulation

open access: yesNetworks and Heterogeneous Media, 2016
The nonlocal nonlinear aggregation equation in one space dimension is investigated.In the so-called attractive case smooth solutions blow up in finite time, so that weak measure solutions are introduced.The velocity involved in the equation becomes ...
François James, Nicolas Vauchelet
doaj   +1 more source

Triple-quark elastic scatterings and thermalization

open access: yes, 2005
Triple-quark elastic scattering amplitudes from perturbative QCD are first calculated and then used in a transport equation to study the thermalization of quark matter.
Ackermann   +37 more
core   +3 more sources

A method of approximate green's function for solving reflection of particles in plane geometry [PDF]

open access: yesNuclear Technology and Radiation Protection, 2016
A method for approximate analytical solution of transport equation for particles in plane geometry is developed by solving Fredholm integral equations. Kernels of these equations are the Green's functions for infinite media treated approximately.
Belić Čedomir I.   +2 more
doaj   +1 more source

Numerical Investigation of Pollutant Transport in a Realistic Terrain with the SPH-SWE Method

open access: yesFrontiers in Environmental Science, 2022
A large amount of wastewater from industrial and urban residents enters rivers and lakes through the sewage outlet, causing a deterioration of water quality near the sewage outlet.
Lirong Tian   +12 more
doaj   +1 more source

Direct discrete method and its application to neutron transport problems [PDF]

open access: yesNuclear Technology and Radiation Protection, 2003
The objective of this paper is to introduce a new direct method for neutronic calculations. This method, called direct discrete method, is simpler than the application of the neutron transport equation and more compatible with the physical meanings of ...
Vosoughi Naser   +3 more
doaj   +1 more source

Quasiparticle transport equation with collision delay. II. Microscopic Theory

open access: yes, 1998
For a system of non-interacting electrons scattered by neutral impurities, we derive a modified Boltzmann equation that includes quasiparticle and virial corrections.
A. P. Jauho   +39 more
core   +1 more source

On L to H-mode transitions of the tokamak and entropy reduction [PDF]

open access: yesNuclear Technology and Radiation Protection, 2006
In an ideal case, it is assumed that the models for tokamak and stellarator plasma behaviour lead to the theory of invariant manifolds by Rastović [Chaos, Solitons & Fractals, 2007]. But, at the present state of knowledge a more realistic concept for
Rastović Danilo
doaj   +1 more source

Theory of spin-polarized transport in ferromagnet-semiconductor structures: Unified description of ballistic and diffusive transport

open access: yes, 2005
A theory of spin-polarized electron transport in ferromagnet-semiconductor heterostructures, based on a unified semiclassical description of ballistic and diffusive transport in semiconductors, is outlined.
Lipperheide, R., Wille, U.
core   +1 more source

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