Results 11 to 20 of about 13,634 (265)
TESTING FOR CHANGES IN KENDALL’S TAU [PDF]
Econometric Theory, 2016 For a bivariate time series ((Xi,Yi))i=1,...,n, we want to detect whether the correlation betweenXiandYistays constant for alli= 1,...n. We propose a nonparametric change-point test statistic based on Kendall’s tau. The asymptotic distribution under the null hypothesis of no change follows from a newU-statistic invariance principle for dependent ...
Dehling, Herold +3 more
openaire +7 more sources
On kernel-based estimation of conditional Kendall’s tau: finite-distance bounds and asymptotic behavior [PDF]
Dependence 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 +3 more sources
Nested Archimedean Copulas Meet R: The nacopula Package [PDF]
Journal of Statistical Software, 2011 The package nacopula provides procedures for constructing nested Archimedean copulas in any dimensions and with any kind of nesting structure, generating vectors of random variates from the constructed objects, computing function values and probabilities
Marius Hofert, Martin Maechler
doaj +1 more source
Validation of clinical frailty scale in Chinese translation
BMC Geriatrics, 2022 Background Identification of frailty is crucial to guide patient care for the elderly. The Clinical Frailty Scale (CFS) is a reliable, synthesis and clinical judgment-based tool. However, a validated Chinese version of CFS (CFS-C) is lacking.
Yi-Chun Chou +8 more
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Integrated Environmental Assessment and Management, EarlyView., 2023 Abstract In the Lake Koocanusa‐Kootenai River system (Montana, USA and British Columbia, Canada), selenium (Se) contamination has become an international concern and is suspected to contribute to the observed burbot (Lota lota) population collapse. Due to our limited ability to sample burbot in Lake Koocanusa for monitoring studies, we used a reference
Stephanie D. Graves +6 more
wiley +1 more source
Hypertension in Pregnancy, 2021 Objective: To examine the correlation between plasma cerebral biomarkers (S100B and neuron-specific enolase (NSE)) and ultrasonographic optic-nerve-sheath-diameter (ONSD) in preeclampsia.
Gabrijela Brzan Simenc +4 more
doaj +1 more source
Investigator’s Global Assessment of Chronic Prurigo: A New Instrument for Use in Clinical Trials
Acta Dermato-Venereologica, 2021 Chronic prurigo is a pruritic disease characterized by the development of pruriginous lesions due to scratching. The number of lesions is representative of the stage of the disease, while the presence of excoriations reflects the scratching activity. Aim
Claudia Zeidler +4 more
doaj +1 more source
Evaluation of Motion Artifact Metrics for Coronary CT Angiography [PDF]
, 2018 Purpose This study quantified the performance of coronary artery motion artifact metrics relative to human observer ratings. Motion artifact metrics have been used as part of motion correction and best‐phase selection algorithms for Coronary Computed ...
Contijoch +19 more
core +2 more sources
Is Sonographic Assessment of Intratendinous Blood Flow in Achilles Tendinopathy Patients Reliable?
Ultrasound International Open, 2016 Purpose: The purpose of this study was to investigate the consistency between different Doppler ultrasound (DU) modes as well as the intra- and inter-observer reliability of investigators with different experience level in assessing intratendinous blood ...
L. Risch +6 more
doaj +1 more source
Information Entropy Based on Propagation Feature of Node for Identifying the Influential Nodes
Complexity, 2021 For understanding and controlling spreading in complex networks, identifying the most influential nodes, which can be applied to disease control, viral marketing, air traffic control, and many other fields, is of great importance. By taking the effect of
Linfeng Zhong +5 more
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