Results 51 to 60 of about 239,904 (190)

Ab initio molecular dynamics study of collective excitations in liquid H$_2$O and D$_2$O: Effect of dispersion corrections [PDF]

open access: yes, 2016
The collective dynamics in liquid water is an active research topic experimentally, theoretically and via simulations. Here, ab initio molecular dynamics simulations are reported in heavy and ordinary water at temperature 323.15 K, or 50$^\circ$C.
Bryk, T., Seitsonen, A. P.
core   +5 more sources

Analysis of fractal fractional differential equations

open access: yesAlexandria Engineering Journal, 2020
Nonlocal differential and integral operators with fractional order and fractal dimension have been recently introduced and appear to be powerful mathematical tools to model complex real world problems that could not be modeled with classical and nonlocal
Abdon Atangana   +2 more
doaj   +1 more source

Anomalous Solute Transport Using Adsorption Effects and the Degradation of Solute

open access: yesComputation, 2023
In this work, anomalous solute transport using adsorption effects and the decomposition of solute was studied. During the filtration of inhomogeneous liquids, a number of new phenomena arise, and this is very important for understanding the mechanisms of
B. Kh. Khuzhayorov   +3 more
doaj   +1 more source

EXPONENTIAL DISPERSION MODELS AND THE GAUSS‐NEWTON ALGORITHM [PDF]

open access: yesAustralian Journal of Statistics, 1991
SummaryIt is known that the Fisher scoring iteration for generalized linear models has the same form as the Gauss‐Newton algorithm for normal regression. This note shows that exponential dispersion models are the most general families to preserve this form for the scoring iteration. Therefore exponential dispersion models are the most general extension
openaire   +3 more sources

A Novel Mechanism-Equivalence-Based Tweedie Exponential Dispersion Process for Adaptive Degradation Modeling and Life Prediction

open access: yesSensors
Accurately predicting the remaining useful life (RUL) of critical mechanical components is a central challenge in reliability engineering. Stochastic processes, which are capable of modeling uncertainties, are widely used in RUL prediction.
Jiayue Wu   +4 more
doaj   +1 more source

The Born and Markov approximations for atom lasers

open access: yes, 1998
We discuss the use of the Born and Markov approximations in describing the dynamics of an atom laser. In particular, we investigate the applicability of the quantum optical Born-Markov master equation for describing output coupling.
Hope, J. J., Moy, G. M., Savage, C. M.
core   +1 more source

Modelling Baryon Acoustic Oscillations with Perturbation Theory and Stochastic Halo Biasing [PDF]

open access: yes, 2013
In this work we investigate the generation of mock halo catalogues based on perturbation theory and nonlinear stochastic biasing with the novel PATCHY-code.
Kitaura, Francisco-Shu   +2 more
core   +1 more source

Escape rate: a Lagrangian measure of particle deposition from the atmosphere [PDF]

open access: yesNonlinear Processes in Geophysics, 2013
Due to rising or descending air and due to gravity, aerosol particles carry out a complicated, chaotic motion and move downwards on average. We simulate the motion of aerosol particles with an atmospheric dispersion model called the Real Particle ...
T. Haszpra, T. Tél
doaj   +1 more source

Modelling Coronavirus and Larvae Pyrausta Data: A Discrete Binomial Exponential II Distribution with Properties, Classical and Bayesian Estimation

open access: yesAxioms, 2022
In this article, we propose the discrete version of the binomial exponential II distribution for modelling count data. Some of its statistical properties including hazard rate function, mode, moments, skewness, kurtosis, and index of dispersion are ...
Mohamed S. Eliwa   +3 more
doaj   +1 more source

Spin dynamics simulations of the magnetic dynamics of RbMnF$_3$ and direct comparison with experiment

open access: yes, 1999
Spin-dynamics techniques have been used to perform large-scale simulations of the dynamic behavior of the classical Heisenberg antiferromagnet in simple cubic lattices with linear sizes $L\leq 60$. This system is widely recognized as an appropriate model
A. Bunker   +29 more
core   +1 more source

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