Results 61 to 70 of about 1,324,645 (291)

Tails of probability density for sums of random independent variables

open access: yes, 2001
The exact expression for the probability density $p_{_N}(x)$ for sums of a finite number $N$ of random independent terms is obtained. It is shown that the very tail of $p_{_N}(x)$ has a Gaussian form if and only if all the random terms are distributed ...
A. R. R. Papa   +13 more
core   +1 more source

Sex‐Stratified Association of Regional Dopamine Transporter Binding With Disease Progression in Amyotrophic Lateral Sclerosis

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To clarify the clinical relevance of dopamine transporter single‐photon emission computed tomography (DAT‐SPECT) abnormalities in amyotrophic lateral sclerosis (ALS), with a prespecified focus on sex‐stratified associations with disease progression and short‐term prognosis.
Tomoya Kawazoe   +7 more
wiley   +1 more source

A Novel Method of Bridge Deflection Prediction Using Probabilistic Deep Learning and Measured Data

open access: yesSensors
The deflection control of the main girder in suspension bridges, as flexible structures, is critically important during their operation. To predict the vertical deflection of existing suspension bridge girders under the combined effects of stochastic ...
Xinhui Xiao   +7 more
doaj   +1 more source

Transient response characteristics of linear systems subjected to non-Gaussian random excitation with a wide range of bandwidth

open access: yesNihon Kikai Gakkai ronbunshu, 2021
In the previous study, one of the authors investigated stationary response characteristics of linear systems subjected to non-Gaussian random excitation.
Hideto FUKUSHIMA, Takahiro TSUCHIDA
doaj   +1 more source

q-Gaussian based Smoothed Functional Algorithm for Stochastic Optimization

open access: yes, 2012
The q-Gaussian distribution results from maximizing certain generalizations of Shannon entropy under some constraints. The importance of q-Gaussian distributions stems from the fact that they exhibit power-law behavior, and also generalize Gaussian ...
Bhatnagar, Shalabh   +2 more
core   +1 more source

Estimation from quantized Gaussian measurements: when and how to use dither [PDF]

open access: yes, 2019
Subtractive dither is a powerful method for removing the signal dependence of quantization noise for coarsely quantized signals. However, estimation from dithered measurements often naively applies the sample mean or midrange, even when the total noise ...
Dawson, Robin M. A.   +2 more
core   +2 more sources

Associations of Rheumatoid Arthritis Disease Activity With Frailty Over Five Years of Follow‐up

open access: yesArthritis Care &Research, EarlyView.
Objective To evaluate whether rheumatoid arthritis (RA) disease activity is associated with frailty both in cross‐section and longitudinally. Methods Participants within the Veterans Affairs Rheumatoid Arthritis (VARA) registry enrolled from 2003 to 2022 were included.
Courtney N. Loecker   +14 more
wiley   +1 more source

Dynamical Universal Behavior in Quantum Chaotic Systems

open access: yes, 2010
We discover numerically that a moving wave packet in a quantum chaotic billiard will always evolve into a quantum state, whose density probability distribution is exponential.
Wu, Biao, Xiong, Hongwei
core   +1 more source

Higher order moments of the density field in a parameterized sequence of non-gaussian theories [PDF]

open access: yes, 1998
We calculate the higher order moments in a sequence of models where the initial density fluctuations are drawn from a chi^2_nu distribution with a power-law power spectrum.
Antoniadis   +44 more
core   +2 more sources

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