Results 21 to 30 of about 25,546 (258)

A continuous rainfall model based on vine copulas [PDF]

open access: yesHydrology and Earth System Sciences, 2015
Copulas have already proven their flexibility in rainfall modelling. Yet, their use is generally restricted to the description of bivariate dependence.
H. Vernieuwe   +3 more
doaj   +1 more source

Goodness-of-Fit Tests For Elliptical and Independent Copulas through Projection Pursuit

open access: yesAlgorithms, 2011
Two goodness-of-fit tests for copulas are being investigated. The first one deals with the case of elliptical copulas and the second one deals with independent copulas.
Jacques Touboul
doaj   +1 more source

Copulas in Classical Probability Sense

open access: yesمجلة بغداد للعلوم, 2020
Copulas are simply equivalent structures to joint distribution functions. Then, we propose modified structures that depend on classical probability space and concepts with respect to copulas.
Ahmed AL-Adilee   +2 more
doaj   +1 more source

Theoretical Study of Some Angle Parameter Trigonometric Copulas

open access: yesModelling, 2022
Copulas are important probabilistic tools to model and interpret the correlations of measures involved in real or experimental phenomena. The versatility of these phenomena implies the need for diverse copulas.
Christophe Chesneau
doaj   +1 more source

Copulas

open access: yesUniform distribution theory, 2023
Abstract Two-dimensional distribution function g(x, y) defined in [0, 1]2 is called copula, if g(x, 1) = x and g(1,y)= y for every x, y. Similarly, s-dimensional copula is a distribution function g(x 1,x 2,...,x s) such that every k-dimensional face function
Strauch, Oto, Baláž, Vladimír
openaire   +2 more sources

A Functional for Copulas and Quasi-Copulas [PDF]

open access: yesISRN Probability and Statistics, 2012
We recall and study some properties of a known functional operating on the set of n-copulas and determine conditions under such functional is well defined on the set of n-quasi-copulas. As a consequence, new families of copulas and quasi-copulas are defined, illustrating our results with several examples.
openaire   +2 more sources

A study of dependency features of spike trains through copulas [PDF]

open access: yes, 2019
Simultaneous recordings from many neurons hide important information and the connections characterizing the network remain generally undiscovered despite the progresses of statistical and machine learning techniques.
Sacerdote, Laura, Verzelli, Pietro
core   +2 more sources

Extensions of Two Bivariate Strict Archimedean Copulas

open access: yesComputational Journal of Mathematical and Statistical Sciences, 2023
The copula approach provides an option for capturing the structure of dependence between two quantitative variables. This approach is based on special bivariate functions called copulas.
Christophe Chesneau
doaj   +1 more source

Types of dependence and time-dependent association between two lifetimes in single parameter copula models [PDF]

open access: yes, 2006
Most publications on modeling insurance contracts on two lives, assuming dependence of the two lifetimes involved, focus on the time of inception of the contract.
Spreeuw, J.
core   +1 more source

A mixed effect model for bivariate meta-analysis of diagnostic test accuracy studies using a copula representation of the random effects distribution [PDF]

open access: yes, 2015
Diagnostic test accuracy studies typically report the number of true positives, false positives, true negatives and false negatives. There usually exists a negative association between the number of true positives and true negatives, because studies that
Arends   +51 more
core   +2 more sources

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