Results 21 to 30 of about 188,093 (295)

Sand-Dust Image Enhancement Using Chromatic Variance Consistency and Gamma Correction-Based Dehazing

open access: yesSensors, 2022
In sand-dust environments, the low quality of images captured outdoors adversely affects many remote-based image processing and computer vision systems, because of severe color casts, low contrast, and poor visibility of sand-dust images.
Jong-Ju Jeon, Tae-Hee Park, Il-Kyu Eom
doaj   +1 more source

The Variance Gamma Distribution [PDF]

open access: yesSignificance, 2019
Abstract Scott Nestler and Andrew Hall provide an overview of a little-known but highly flexible distribution, which can be useful for modelling share price ...
Scott Nestler, Andrew Hall
openaire   +1 more source

SIFAT-SIFAT DAN KEJADIAN KHUSUS DISTRIBUSI GAMMA

open access: yesBarekeng, 2021
The gamma distribution is one of special continuous random variable distribution with scale parameter  and shape parameter  where  is positive real numbers.
Royke Yohanes Warella   +2 more
doaj   +1 more source

Optimal Variance–Gamma approximation on the second Wiener chaos [PDF]

open access: yesJournal of Functional Analysis, 2022
In this paper, we consider a target random variable $Y \sim \CVG$ distributed according to a centered Variance--Gamma distribution. For a generic random element $F=I_2(f)$ in the second Wiener chaos with $\E[F^2]= \E[Y^2]$ we establish a non-asymptotic optimal bound on the distance between $F$ and $Y$ in terms of the maximum of difference of the first ...
Azmoodeh, Ehsan   +2 more
openaire   +3 more sources

Confidence interval estimation of the common mean of several gamma populations

open access: yesPLoS ONE, 2022
Gamma distributions are widely used in applied fields due to its flexibility of accommodating right-skewed data. Although inference methods for a single gamma mean have been well studied, research on the common mean of several gamma populations are ...
Li Yan
doaj   +2 more sources

Higher-order asymptotic corrections and their application to the Gamma Variance Model

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We present improved methods for calculating confidence intervals and p values in situations where standard asymptotic approaches fail due to small sample sizes.
Enzo Canonero   +2 more
doaj   +1 more source

APPLICATION OF THE JSIR2S CODE PACKAGE FOR SHUTDOWN DOSE RATE CALCULATIONS ON JET [PDF]

open access: yesEPJ Web of Conferences, 2021
In this paper we present a computational exercise for shut-down dose rate calculations for the JET tokamak using the in-house developed JSIR2S code package as part of its validation.
Ambrožič Klemen   +3 more
doaj   +1 more source

Deep variance gamma processes

open access: yesStat, 2023
Lévy processes are useful tools for analysis and modeling of jump‐diffusion processes. Such processes are commonly used in the financial and physical sciences. One approach to building new Lévy processes is through subordination, or a random time change.
Caitlin M. Berry, William Kleiber
openaire   +1 more source

SOME PRICING TOOLS FOR THE VARIANCE GAMMA MODEL [PDF]

open access: yesInternational Journal of Theoretical and Applied Finance, 2020
We establish several closed pricing formulas for various path-independent payoffs, under an exponential Lévy model driven by the Variance Gamma process. These formulas take the form of quickly convergent series and are obtained via tools from Mellin transform theory as well as from multidimensional complex analysis.
openaire   +2 more sources

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