Results 71 to 80 of about 21,349,706 (242)

Scaled Density Functional Theory Correlation Functionals [PDF]

open access: yesThe Journal of Physical Chemistry A, 2007
We show that a simple one-parameter scaling of the dynamical correlation energy estimated by the density functional theory (DFT) correlation functionals helps increase the overall accuracy for several local and nonlocal functionals. The approach taken here has been described as the "scaled dynamical correlation" (SDC) method [Ramachandran, J.
Mohammed M, Ghouri   +2 more
openaire   +2 more sources

The method of the correlation and dispersion defining of the total power components in the electric transport devices

open access: yesNauka ta progres transportu, 2013
Purpose. Development and theoretical ground of the analytical method for the calculation of the active, reactive and total powers in the electric traction devices, taking into consideration the non-stationary character of the stochastic processes change ...
A. V. Nikitenko, M. O. Kostin
doaj  

Robust Online Correlation Method for Identification of a Nonparametric Model of Type 1 Diabetes

open access: yesIEEE Access
The paper presents an online version of the identification method for estimating the impulse responses in the case of a two-input single-output linear empirical model of type 1 diabetes that allows us to adapt the model parameters due to the intra ...
Martin Dodek, Eva Miklovicova
doaj   +1 more source

Sampling Theorems for Stochastic Signals. Appraisal of Paul L. Butzer’s Work

open access: yesAxioms, 2019
The sampling reconstruction theory is one of the great areas of the analysis in which Paul Leo Butzer earned longstanding and excellent theoretical results.
Tibor K. Pogány
doaj   +1 more source

Two-point correlation function for Dirichlet L-functions

open access: yes, 2013
The two-point correlation function for the zeros of Dirichlet L-functions at a height E on the critical line is calculated heuristically using a generalization of the Hardy-Littlewood conjecture for pairs of primes in arithmetic progression.
Bogomolny, E., Keating, J. P.
core   +1 more source

Power-law decay of the spatial correlation function in exciton-polariton condensates

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2012
We create a large exciton-polariton condensate and employ a Michelson interferometer setup to characterize the short- and long-distance behavior of the first order spatial correlation function.
G. Roumpos   +10 more
semanticscholar   +1 more source

Correlation function apparatus Patent [PDF]

open access: yes, 1967
Circuitry for developing autocorrelation function continuously within signal receiving ...
Goldstein, R. M.
core   +1 more source

Correlation Function of Galaxy Groups

open access: yes, 2000
We use the Updated Zwicky Catalog of galaxies (Falco et al. 1999) to generate a catalog of groups, by means of a friend-of-friend algorithm. The correlation length of the total sample is well fitted with a power law $ \xi(r)=(r/r_0)^\gamma $ with ...
Barrow J. D.   +7 more
core   +1 more source

Random Oscillations of Rail Vehicles with Nonlinear Spring Suspension Characteristics

open access: yesВестник Научно-исследовательского института железнодорожного транспорта, 2015
There is considered about the problem of nonsteady random processes as related to rail vehicle oscillations under action of multidimentional random forcing process in the form of vertical and horizontal irregularities of the left and right rail lines. In
A. N. Savos’Kin   +3 more
doaj  

Correlated correlation functions in random-bond ferromagnets [PDF]

open access: yesNuclear Physics B, 2000
The two-dimensional random-bond Q-state Potts model is studied for Q near 2 via the perturbative renormalisation group to one loop. It is shown that weak disorder induces cross-correlations between the quenched-averages of moments of the two-point spin/spin and energy/energy correlation functions, which should be observable numerically in specific ...
Davis, T, Cardy, J
openaire   +2 more sources

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