Results 21 to 30 of about 28,056 (199)

Simulation of potential evapotranspiration values based on vine copula

open access: yesMeteorological Applications, 2021
Vine copula had a great impact on the study and analysis of dependence structures in various sciences. In multivariate analyses with dimensions of more than two variables, it is associated with computational complexities that solve vine copulas and these
Abbas Khashei‐Siuki   +3 more
doaj   +1 more source

On kernel-based estimation of conditional Kendall’s tau: finite-distance bounds and asymptotic behavior

open access: yesDependence Modeling, 2019
We study nonparametric estimators of conditional Kendall’s tau, a measure of concordance between two random variables given some covariates. We prove non-asymptotic pointwise and uniform bounds, that hold with high probabilities.
Derumigny Alexis, Fermanian Jean-David
doaj   +1 more source

Is CT-based perfusion and collateral imaging sensitive to time since stroke onset?

open access: yesFrontiers in Neurology, 2015
PurposeCT-based perfusion and collateral imaging is increasingly used in the assessment of patients with acute stroke. Time of stroke onset is a critical factor in determining eligibility for and benefit from thrombolysis. Animal studies predict that the
Smriti eAgarwal   +8 more
doaj   +1 more source

Distribution-Free Tests of Independence in High Dimensions [PDF]

open access: yes, 2017
We consider the testing of mutual independence among all entries in a $d$-dimensional random vector based on $n$ independent observations. We study two families of distribution-free test statistics, which include Kendall's tau and Spearman's rho as ...
Chen, Shizhe, Han, Fang, Liu, Han
core   +2 more sources

Early Warning Signals for Bearing Failure Using Detrended Fluctuation Analysis

open access: yesApplied Sciences, 2020
Prognostic techniques play a critical role in predicting upcoming faults and failures in machinery or a system by monitoring any deviation in the operation.
Laith Shalalfeh, Ashraf AlShalalfeh
doaj   +1 more source

Three‐dimensional endovaginal ultrasound assessment using the levator ani deficiency score in primiparas: A replication study

open access: yesActa Obstetricia et Gynecologica Scandinavica, 2023
Introduction It is essential to assess the levator ani properly as part of clinical care in patients presenting with pelvic floor dysfunction. The levator ani deficiency scoring system is a previously published method to assess levator ani defects with ...
Emilia Rotstein   +3 more
doaj   +1 more source

Intercultural Management – A Challenge for Contemporary Organizations [PDF]

open access: yesProblemy Zarządzania, 2019
The objective of the paper is to analyse the perception, knowledge and application of training in intercultural management and cultural tolerance by the surveyed organizations.
dr Katarzyna Łukasik
doaj   +1 more source

Application of vine copulas to dependence analysis of water quality data [PDF]

open access: yesJournal of Applied Research in Water and Wastewater, 2022
In this study, using vine copulas and tree sequences, dependence analysis of groundwater quality variables (Total hardness (TH), Sodium adsorption ratio (SAR), Sodium percentage (Na %) and magnesium (Mg)) was performed.
Mohammad Nazeri Tahroudi   +3 more
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

Spatiotemporal distribution and predictors of tuberculosis incidence in Morocco

open access: yesInfectious Diseases of Poverty, 2018
Background Tuberculosis (TB) is a major health problem in Morocco. This study aims at examining trends in TB in Morocco and identifying TB spatial clusters and TB-associated predictors. Method Country-level surveillance data was exploited.
Mina Sadeq, Jamal Eddine Bourkadi
doaj   +1 more source

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