Results 31 to 40 of about 2,718,811 (196)

Simultaneous Analysis of Monthly Water Consumption, Air Temperature and Water Supply Network Pressure Using Copula Functions, Case Study: Zone No. One of Isfahan City [PDF]

open access: yesعلوم و مهندسی آب و فاضلاب, 2023
Analysis and control of water consumption in water supply and distribution networks is important issues, given the country's climatic conditions and the fact that they can be of great help to designers and managers of water resources.
Mohammadhossein Keykhosravi   +3 more
doaj   +1 more source

Analyzing the duration frequency and severity of drought using copula function in the Yazd city

open access: yesJournal of Water and Climate Change, 2022
Duration and severity are the two main variables used in drought analysis. The copula functions are appropriate for multivariate drought analysis, as it lacks the limitations of the classical multivariate distribution function.
Mehrtash EskandariPour   +1 more
doaj   +1 more source

Bivariate copulas on the exponentially weighted moving average control chart [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2016
This paper proposes four types of copulas on the Exponentially Weighted Moving Average (EWMA) control chart when observations are from an exponential distribution using a Monte Carlo simulation approach. The performance of the control chart is based on
Sasigarn Kuvattana   +3 more
doaj   +1 more source

A Comparative Perspective on Multivariate Modeling of Insurance Compensation Payments with Regression-Based and Copula-Based Models

open access: yesEkoist Journal of Econometrics and Statistics, 2023
In this study, compensation payments for Turkish motor vehicles’ compulsory third-party liability insurance between 2018 and 2022 are modeled from a comparative perspective using regression-based and copula-based multivariate statistical methods.
Övgücan Karadağ Erdemir
doaj   +1 more source

Functional treatment of asymmetric copulas

open access: yes, 2019
The concept of asymmetric copulas is revisited and is made more precise. We give a rigorous topological argument for opportunity to define asymmetry measures defined recently by K.F Siburg [6] through exhibiting at least three ordered classes of copulas according to a suitable equivalence relation. We define a process of ordering subcopulas which makes
Sani, A., Karbil, L.
openaire   +3 more sources

Bayesian Nonparametric Inference for a Multivariate Copula Function [PDF]

open access: yes, 2014
The paper presents a general Bayesian nonparametric approach for estimating a high dimensional copula. We first introduce the skew-normal copula, which we then extend to an infinite mixture model.
Wu, Juan, Wang, Xue, Walker, Stephen G.
core   +1 more source

Estimation of Copula Density Using the Wavelet Transform

open access: yesمجلة بغداد للعلوم
This paper proposes a new method to estimate the copula density function using wavelet decomposition as a nonparametric method, to obtain more accurate results and address the issue of boundary effects that nonparametric estimation methods suffer from ...
Fatimah Hashim Falhi   +1 more
doaj   +1 more source

The application of the hybrid copula-GARCH approach in the simulation of extreme discharge values

open access: yesApplied Water Science, 2022
Statistical analysis and simulation of annual maximum discharge values, while considering the corresponding maximum daily rainfall, provide a comprehensive view of flood management.
Mohammad Nazeri Tahroudi   +2 more
doaj   +1 more source

A method of moments to estimate bivariate survival functions: the copula approach

open access: yesStatistica, 2013
In this paper we discuss the problem on parametric and non parametric estimation of the distributions generated by the Marshall-Olkin copula. This copula comes from the Marshall-Olkin bivariate exponential distribution used in reliability analysis.
Silvia Angela Osmetti   +1 more
doaj   +1 more source

A Vine Copula-Based Global Sensitivity Analysis Method for Structures with Multidimensional Dependent Variables

open access: yesMathematics, 2021
For multidimensional dependent cases with incomplete probability information of random variables, global sensitivity analysis (GSA) theory is not yet mature.
Zhiwei Bai   +4 more
doaj   +1 more source

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