Results 21 to 30 of about 93,664 (290)

Fourth Moments and Independent Component Analysis [PDF]

, 2015
In independent component analysis it is assumed that the components of the observed random vector are linear combinations of latent independent random variables, and the aim is then to find an estimate for a transformation matrix back to these ...
Miettinen, Jari, Nordhausen, Klaus, Oja, Hannu, Taskinen, Sara   +3 more
core   +1 more source

A Neural Network Based on the Johnson S_U Translation System and Related Application to Electromyogram Classification

IEEE Access, 2021
Electromyogram (EMG) classification is a key technique in EMG-based control systems. Existing EMG classification methods, which do not consider EMG features that have distribution with skewness and kurtosis, have limitations such as the requirement to ...
Hideaki Hayashi, Taro Shibanoki, Toshio Tsuji   +2 more
doaj   +1 more source

Nonparametric multivariate kurtosis and tailweight measures [PDF]

Journal of Nonparametric Statistics, 2005
For nonparametric exploration or description of a distribution, the treatment of location, spread, symmetry, and skewness is followed by characterization of kurtosis. Classical moment-based kurtosis measures the dispersion of a distribution about its ‘shoulders’. Here, we consider quantile-based kurtosis measures. These are robust, defined more widely,
Jin Wang, Robert Serfling
openaire   +1 more source

Sub-dimensional Mardia measures of multivariate skewness and kurtosis

Journal of Multivariate Analysis, 2022
The Mardia measures of multivariate skewness and kurtosis summarize the respective characteristics of a multivariate distribution with two numbers. However, these measures do not reflect the sub-dimensional features of the distribution. Consequently, testing procedures based on these measures may fail to detect skewness or kurtosis present in a sub ...
Joydeep Chowdhury, Subhajit Dutta, Reinaldo Boris Arellano-Valle, Marc G. Genton   +3 more
openaire   +3 more sources

Non-Gaussianity in the Weak Lensing Correlation Function Likelihood -- Implications for Cosmological Parameter Biases

, 2020
We study the significance of non-Gaussianity in the likelihood of weak lensing shear two-point correlation functions, detecting significantly non-zero skewness and kurtosis in one-dimensional marginal distributions of shear two-point correlation ...
Eifler, Tim, Harnois-Déraps, Joachim, Lee, Ann B., Lin, Chien-Hao, Mandelbaum, Rachel, Pospisil, Taylor, Singh, Sukhdeep   +6 more
core   +1 more source

Quantitative CT variables enabling response prediction in neoadjuvant therapy with EGFR-TKIs: are they different from those in neoadjuvant concurrent chemoradiotherapy?

PLoS ONE, 2014
Background and purposeTo correlate changes of various CT parameters after the neoadjuvant treatment in patients with lung adenocarcinoma with pathologic responses, focused on their relationship with different therapeutic options, particularly of EGFR-TKI
Yousun Chong, Jae-Hun Kim, Ho Yun Lee, Yong Chan Ahn, Kyung Soo Lee, Myung-Ju Ahn, Jhingook Kim, Young Mog Shim, Joungho Han, Yoon-La Choi   +9 more
doaj   +1 more source

Definição do tamanho amostral usando simulação Monte Carlo para o teste de normalidade baseado em assimetria e curtose. II.: abordagem multivariada Sample size definition using Monte Carlo simulation for the normality test based on skewness and kurtosis. II.: multivariate approach

Ciência e Agrotecnologia, 2003
Realizou-se este trabalho com o objetivo de determinar um tamanho amostral ótimo para as estatísticas univariadas de assimetria e curtose (z1 e z2) que, neste caso, foram adaptadas para o caso multivariado, e as estatísticas multivariadas de assimetria e
Andréa Cristiane dos Santos, Daniel Furtado Ferreira   +1 more
doaj   +1 more source

Texture analysis of acute myocardial infarction with CT: First experience study. [PDF]

PLoS ONE, 2017
To investigate the feasibility and accuracy of texture analysis to distinguish through objective and quantitative image information between healthy and infarcted myocardium with computed tomography (CT).Twenty patients (5 females; mean age 56±10years ...
Ricarda Hinzpeter, Matthias W Wagner, Moritz C Wurnig, Burkhardt Seifert, Robert Manka, Hatem Alkadhi   +5 more
doaj   +1 more source

The value of diffusion kurtosis imaging histogram combine with EphA2 grading in glioma grading

Chinese Journal of Contemporary Neurology and Neurosurgery, 2023
Objective To investigate the value of diffusion kurtosis imaging (DKI) histogram combined with Ephrin type⁃A receptor 2 (EphA2) in the evaluation of glioma grading.
LI Jian⁃rui, LIU Xiao⁃xue, XU Qiang, LUO Zhong⁃qiang, LU Guang⁃ming, ZHANG Zhi⁃qiang   +5 more
doaj   +1 more source

A generalized multivariate kurtosis ordering and its applications

Journal of Multivariate Analysis, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jin Wang, Weihua Zhou
openaire   +2 more sources