Results 91 to 100 of about 7,552,651 (318)
Consistency relations for non-Gaussianity
Journal of Cosmology and Astroparticle Physics, 2008 We investigate consistency relations for non-Gaussianity. We provide a model-independent dynamical proof for the consistency relation of 3-point correlation functions from the Hamiltonian and field redefinition. This relation can be applied to single field inflation, multi-field inflation and the curvaton scenario. This relation can also be generalized
Li, Miao, Wang, Yi
openaire +3 more sources
Persistent homology and non-Gaussianity [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 21 pages, 11 ...
Cole, Alex, Shiu, Gary
openaire +2 more sources
Annals 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
Estimation of signals in colored non gaussian noise based on Gaussian Mixture models [PDF]
, 2006 Non-Gaussianity of signals/noise often results in significant performance degradation for systems, which are designed using the Gaussian assumption. So non-Gaussian signals/noise require a different modelling and processing approach.
Anand, GV, Pradeepa, R
core
Non-stationary log-periodogram regression [PDF]
, 1998 We study asymptotic properties of the log-periodogram semiparametric estimate of the memory parameter d for non-stationary (d>=1/2) time series with Gaussian increments, extending the results of Robinson (1995) for stationary and invertible Gaussian ...
Velasco Gómez, Carlos +2 more
core +1 more source
Associations of Rheumatoid Arthritis Disease Activity With Frailty Over Five Years of Follow‐up
Arthritis 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
The homogeneous explanation of Fickian yet non Gaussian diffusion
New Journal of PhysicsThis article examines the phenomenon known as Fickian-yet-non-Gaussian diffusion (FnGD). We provide the first homogeneous interpretation of FnGD: we show that in a medium treated as homogeneous, non-Gaussian propagators can arise because the equilibrium ...
Chiara Pezzotti +2 more
doaj +1 more source
Rao and Wald Tests in Nonzero-Mean Non–Gaussian Sea Clutter
Remote SensingThe non-Gaussian nature of radar-observed clutter echoes induces performance degradation in the context of remote sensing target detection when using conventional Gaussian detectors. To enhance target detection performance, this study addresses the issue
Haoqi Wu +3 more
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An Improved Gaussian Mixture CKF Algorithm under Non-Gaussian Observation Noise
Discrete Dynamics in Nature and Society, 2016 In order to solve the problems that the weight of Gaussian components of Gaussian mixture filter remains constant during the time update stage, an improved Gaussian Mixture Cubature Kalman Filter (IGMCKF) algorithm is designed by combining a Gaussian ...
Hongjian Wang, Cun Li
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Which is the right option for Indian market: Gaussian, normal inverse Gaussian, or Tsallis?
IIMB Management Review, 2019 This paper models Nifty spot prices using frameworks based on Gaussian distribution (geometric Brownian motion) and non-Gaussian distributions, viz. normal inverse Gaussian (NIG), and Tsallis distributions, to investigate which model best captures the ...
Prasenjit Chakrabarti +1 more
doaj +1 more source