Results 21 to 30 of about 26,128 (276)

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

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

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

Extreme-Value Copulas [PDF]

open access: yes, 2009
Being the limits of copulas of componentwise maxima in independent random samples, extreme-value copulas can be considered to provide appropriate models for the dependence structure between rare events.
Gudendorf, Gordon, Segers, Johan
core   +1 more source

Characterizations of bivariate conic, extreme value, and Archimax copulas

open access: yesDependence Modeling, 2017
Based on a general construction method by means of bivariate ultramodular copulas we construct, for particular settings, special bivariate conic, extreme value, and Archimax copulas. We also show that the sets of copulas obtained in this way are dense in
Saminger-Platz Susanne   +3 more
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

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

copulaedas: An R Package for Estimation of Distribution Algorithms Based on Copulas [PDF]

open access: yes, 2014
The use of copula-based models in EDAs (estimation of distribution algorithms) is currently an active area of research. In this context, the copulaedas package for R provides a platform where EDAs based on copulas can be implemented and studied.
Gonzalez-Fernandez, Yasser, Soto, Marta
core   +4 more sources

Intermediate Tail Dependence: A Review and Some New Results [PDF]

open access: yes, 2012
The concept of intermediate tail dependence is useful if one wants to quantify the degree of positive dependence in the tails when there is no strong evidence of presence of the usual tail dependence. We first review existing studies on intermediate tail
A. Charpentier   +35 more
core   +1 more source

Factor copula models for item response data [PDF]

open access: yes, 2015
Factor or conditional independence models based on copulas are proposed for multivariate discrete data such as item responses. The factor copula models have interpretations of latent maxima/minima (in comparison with latent means) and can lead to more ...
A. Maydeu-Olivares   +29 more
core   +1 more source

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