Results 71 to 80 of about 672,008 (194)

A Single-End Location Method for Small Current Grounding System Based on the Minimum Comprehensive Entropy Kurtosis Ratio and Morphological Gradient

Applied Sciences
Fault location technology is crucial for enhancing the efficiency of fault maintenance and ensuring the safety of the power supply in small current grounding systems.
Jiyuan Cao, Yanwen Wang, Lingjie Wu, Yongmei Zhao, Le Wang   +4 more
doaj   +1 more source

Multivariate Kurtosis as a Tool for Comparing Copula Models

International Journal of Statistics and Probability, 2016
This paper studies the effectiveness of the Multivariate Kurtosis in comparing the Clayton Copula and the Farleigh-Gumbel-Morgenstern Copula in modeling when the actual populations follow either the bivariate exponential distribution or the bivariate normal distribution.
openaire   +2 more sources

Quantitative diffusion MRI biomarkers predict adverse maternal outcomes in placenta accreta spectrum disorders

Frontiers in Medicine
IntroductionThis study aimed to investigate the potential of diffusion-weighted imaging (DWI) parameters in predicting adverse maternal outcomes in high-risk patients with placenta accreta spectrum (PAS) disorders.MethodsWe conducted a prospective ...
Tao Lu, Li Wang, Yufu Huang, Yazheng Chen, Mou Li   +4 more
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Mine cable partial discharge denoising method based on multivariate variational mode decomposition and improved wavelet threshold

Meitan xuebao
The insulation state of the mine cable plays an important role in the stable operation of the mine power supply system. Partial discharge on-line monitoring is an important means of cable insulation state monitoring.
Jiyuan CAO, Yanwen WANG, Peng CHEN, Xuan ZHOU, Weixiong ZHU, Yihe ZHANG, Le WANG   +6 more
doaj   +1 more source

Measures of Multivariate Skewness and Kurtosis with Principal Components

Japanese journal of applied statistics, 2007
正規性の検定に利用される多変量標本歪度・尖度として,Mardia型とSrivastava型の比較を考察した.古くから良く知られている前者に対し,後者に関してはこれまであまり深く研究されていない.本稿では,非正規性の下での後者の理論的な評価を漸近展開の形で与えた.また,両者の数値的な比較についてシミュレーションを行い検証した.
openaire   +2 more sources

Kalman filter for radio source power and direction of arrival estimation

EURASIP Journal on Advances in Signal Processing
Images are an important source of information for spacecraft navigation. Based on an image and a known attitude, triangulation techniques (intersection or resection) are often used for positioning and navigation.
Cyril Cano, Nawel Arab, Éric Chaumette, Pascal Larzabal, Mohammed Nabil El Korso, Isabelle Vin   +5 more
doaj   +1 more source

Asymmetric multivariate normal mixture GARCH [PDF]

, 2008
An asymmetric multivariate generalization of the recently proposed class of normal mixture GARCH models is developed. Issues of parametrization and estimation are discussed.
Mittnik, Stefan, Haas, Markus, Paolella, Marc S.   +2 more
core  

Tests Based on Skewness and Kurtosis for Multivariate Normality

Communications for Statistical Applications and Methods, 2015
A measure of skewness and kurtosis is proposed to test multivariate normality. It is based on an empirical standardization using the scaled residuals of the observations. First, we consider the statistics that take the skewness or the kurtosis for each coordinate of the scaled residuals.
openaire   +2 more sources

Asymmetric Multivariate Normal Mixture GARCH [PDF]

An asymmetric multivariate generalization of the recently proposed class of normal mixture GARCH models is developed. Issues of parametrization and estimation are discussed.
Markus Haas, Stefan Mittnik, Mark S. Paolella   +2 more
core  

Statistical Analysis of the Three-Dimensional Data of Software Metrics RFC, CBO, and WMC that are not Normally Distributed

Proceedings of the International Conference on Applied Innovations in IT
Empirical data of RFC (response for a class), CBO (coupling between object classes), and WMC (weighted methods per class) software metrics, that can be used for estimation of software quality, deviate from normality.
Sergiy Prykhodko, Lidiia Makarova, Andrii Pukhalevych   +2 more
doaj   +1 more source