Results 21 to 30 of about 77,815 (315)

Computation of the self-diffusion coefficient with low-rank tensor methods: application to the simulation of a cross-diffusion system [PDF]

open access: yesESAIM: Proceedings and Surveys, 2023
Cross-diffusion systems arise as hydrodynamic limits of lattice multi-species interacting particle models. The objective of this work is to provide a numerical scheme for the simulation of the cross-diffusion system identified in [J. Quastel, Comm.
Dabaghi Jad   +2 more
doaj   +1 more source

Bayesian inference of biochemical kinetic parameters using the linear noise approximation [PDF]

open access: yes, 2009
Background Fluorescent and luminescent gene reporters allow us to dynamically quantify changes in molecular species concentration over time on the single cell level.
David A Rand   +14 more
core   +1 more source

Diffusion Model of Preemptive-Resume Priority Systems and Its Application to Performance Evaluation of SDN Switches

open access: yesSensors, 2021
The increasing use of Software-Defined Networks brings the need for their performance analysis and detailed analytical and numerical models of them. The primary element of such research is a model of a SDN switch.
Tomasz Nycz   +2 more
doaj   +1 more source

Adaptability analysis of radiative transport diffusion approximation in planar-graded-index media

open access: yesAdvances in Mechanical Engineering, 2018
To study the applicability of diffusion approximation method, the influence of the optical thickness, scattering albedo, and wall emissivity of the examined medium on the accuracy of the diffusion approximation is analyzed.
Lijun Liu, Hong Shi, Xiaoyan Liu
doaj   +1 more source

Computational optical biopsy

open access: yesBioMedical Engineering OnLine, 2005
Optical molecular imaging is based on fluorescence or bioluminescence, and hindered by photon scattering in the tissue, especially in patient studies. Here we propose a computational optical biopsy (COB) approach to localize and quantify a light source ...
Jiang Ming, Li Yi, Wang Ge
doaj   +1 more source

Diffusion Model of a Non-Integer Order PIγ Controller with TCP/UDP Streams

open access: yesEntropy, 2021
In this article, a way to employ the diffusion approximation to model interplay between TCP and UDP flows is presented. In order to control traffic congestion, an environment of IP routers applying AQM (Active Queue Management) algorithms has been ...
Dariusz Marek   +5 more
doaj   +1 more source

Implicit difference approximation for the two-dimensional space-time fractional diffusion equation [PDF]

open access: yes, 2006
In this paper, we consider a two-dimensional fractional space-time diffusion equation (2DFSTDE) on a finite domain. We examine an implicit difference approximation to solve the 2DFSTDE. Stability and convergence of the method are discussed.
Liu, Fawang   +3 more
core   +1 more source

A basing of the diffusion approximation derivation for the four-wave kinetic integral and properties of the approximation [PDF]

open access: yesNonlinear Processes in Geophysics, 2002
A basing of the diffusion approximation derivation for the Hasselmann kinetic integral describing nonlinear interactions of gravity waves in deep water is discussed.
V. G. Polnikov
doaj  

Tractable diffusion and coalescent processes for weakly correlated loci [PDF]

open access: yes, 2015
Widely used models in genetics include the Wright-Fisher diffusion and its moment dual, Kingman's coalescent. Each has a multilocus extension but under neither extension is the sampling distribution available in closed-form, and their computation is ...
Fearnhead, Paul   +6 more
core   +1 more source

On diffusion approximation with discontinuous coefficients

open access: yesStochastic Processes and their Applications, 2002
Convergence of stochastic processes with jumps to diffusion processes is investigated in the case when the limit process has discontinuous coefficients. An example is given in which the diffusion approximation of a queueing model yields a diffusion process with discontinuous diffusion and drift coefficients.
Krylov, N.V., Liptser, R.
openaire   +3 more sources

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