Results 21 to 30 of about 5,440,548 (293)

First Digits’ Shannon Entropy

open access: yesEntropy, 2022
Related to the letters of an alphabet, entropy means the average number of binary digits required for the transmission of one character. Checking tables of statistical data, one finds that, in the first position of the numbers, the digits 1 to 9 occur ...
Welf Alfred Kreiner
doaj   +1 more source

Asymptotic Probability Density Function of Nonlinear Phase Noise [PDF]

open access: yes, 2003
The asymptotic probability density function of nonlinear phase noise, often called the Gordon-Mollenauer effect, is derived analytically when the number of fiber spans is very large.
Cameron   +7 more
core   +3 more sources

An Alternative Lambert-Type Distribution for Bounded Data

open access: yesMathematics, 2023
In this article, we propose a new two-parameter distribution for bounded data such as rates, proportions, or percentages. The density function of the proposed distribution, presenting monotonic, unimodal, and inverse-unimodal shapes, tends to a positive ...
Héctor Varela   +3 more
doaj   +1 more source

Entropic Density Functional Theory

open access: yesEntropy, 2023
A formulation of density functional theory (DFT) is constructed as an application of the method of maximum entropy for an inhomogeneous fluid in thermal equilibrium. The use of entropy as a systematic method to generate optimal approximations is extended from the classical to the quantum domain.
Ahmad Yousefi, Ariel Caticha
openaire   +4 more sources

Experimental assessment of presumed filtered density function models [PDF]

open access: yes, 2015
Measured filtered density functions (FDFs) as well as assumed beta distribution model of mixture fraction and “subgrid” scale (SGS) scalar variance, used typically in large eddy simulations, were studied by analysing experimental data, obtained from two ...
A. M. K. P. Taylor   +4 more
core   +1 more source

Density functional tight binding [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2014
This paper reviews the basic principles of the density-functional tight-binding (DFTB) method, which is based on density-functional theory as formulated by Hohenberg, Kohn and Sham (KS-DFT). DFTB consists of a series of models that are derived from a Taylor series expansion of the KS-DFT total energy.
Marcus, Elstner, Gotthard, Seifert
openaire   +2 more sources

A stochastic predator–prey model with two competitive preys and Ornstein–Uhlenbeck process

open access: yesJournal of Biological Dynamics, 2023
In this paper, a stochastic predator–prey model with two competitive preys and Ornstein–Uhlenbeck process is formulated and analysed, which is used to obtain a better understanding of the population dynamics.
Qun Liu
doaj   +1 more source

A Novel Anti-Collision Algorithm in RFID for Internet of Things

open access: yesIEEE Access, 2018
This paper studies a novel anti-collision algorithm that is proposed in view of the problem, i.e., label reading collision in radio-frequency identification for Internet of Things.
Bai Zhi, Wang Sainan, He Yigang
doaj   +1 more source

Evolution of Galaxy Luminosity Function and Luminosity Function by Density Environment at 0.03 [PDF]

open access: yes, 2006
Using galaxy sample observed by the BATC large-field multi-color sky survey and galaxy data of SDSS in the overlapped fields, we study the dependence of the restframe $r$-band galaxy luminosity function on redshift and on large-scale environment.
Bolzonella M.   +10 more
core   +2 more sources

Extended social force model‐based mean shift for pedestrian tracking under obstacle avoidance

open access: yesIET Computer Vision, 2017
It has been shown that mean shift tracking algorithm can achieve excellent results in pedestrian tracking task. It empirically estimates the target position of current frame by locating the maximum of a density function from the local neighborhood of the
Xuguang Zhang   +3 more
doaj   +1 more source

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