Results 31 to 40 of about 531,541 (320)

Detection of focal electroencephalogram signals using higher-order moments in EMD-TKEO domain

open access: yesHealthcare Technology Letters, 2019
Detection of epileptogenic focus based on electroencephalogram (EEG) signal screening is an important pre-surgical step to remove affected regions inside the human brain.
Soumya Chatterjee
doaj   +1 more source

Salience and Skewness Preferences

open access: yesJournal of the European Economic Association, 2019
Whether people seek or avoid risks on gambling, insurance, asset, or labor markets crucially depends on the skewness of the underlying probability distribution.
Markus Dertwinkel‐Kalt, M. Köster
semanticscholar   +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

open access: yesCiência 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   +1 more
doaj   +1 more source

A class of optimal tests for symmetry based on local Edgeworth approximations [PDF]

open access: yes, 2011
The objective of this paper is to provide, for the problem of univariate symmetry (with respect to specified or unspecified location), a concept of optimality, and to construct tests achieving such optimality.
Cassart, Delphine   +2 more
core   +3 more sources

Bias, Precision, and Accuracy of Skewness and Kurtosis Estimators for Frequently Used Continuous Distributions

open access: yesSymmetry, 2019
Several measures of skewness and kurtosis were proposed by Hogg (1974) in order to reduce the bias of conventional estimators when the distribution is non-normal. Here we conducted a Monte Carlo simulation study to compare the performance of conventional
Roser Bono   +3 more
semanticscholar   +1 more source

Importance of the first thinning in young mixed Norway spruce and European beech stands

open access: yesJournal of Forest Science, 2017
Experimental results from the first thinning in mixed stands are not broadly experienced by forestry practice. To extend the experience with the thinning of a mixed stand, we studied thinned and unthinned mixtures of Norway spruce with European beech on ...
Jiří NOVÁK   +3 more
doaj   +1 more source

Option Implied Volatility, Skewness, and Kurtosis and the Cross-Section of Expected Stock Returns

open access: yes, 2019
Motivated by the nature of asset pricing models, we investigate the cross-sectional relation between the market's ex-ante view of a stock's risk and the stock's ex-ante expected return.
Turan G. Bali, Jianfeng Hu, Scott Murray
semanticscholar   +1 more source

Research Paper: A Numerical Generation of Gaussian and Non-Gaussian Isotropic/Anisotropic Rough Surfaces [PDF]

open access: yesفیزیک کاربردی ایران
In the present study, the computer simulation has been used to generate the (1+1) and (2+1) surfaces with two types of correlation function Gaussian and correlation function Exponential forms.
Zhaleh Ebrahiminejad
doaj   +1 more source

Variance and Skewness in the FIRST survey [PDF]

open access: yes, 1998
We investigate the large-scale clustering of radio sources in the FIRST 1.4-GHz survey by analysing the distribution function (counts in cells). We select a reliable sample from the the FIRST catalogue, paying particular attention to the problem of how ...
Lahav, O.   +3 more
core   +2 more sources

The time-varying asymmetry of exchange rate returns : a stochastic volatility - stochastic skewness model [PDF]

open access: yes, 2020
While the time-varying volatility of financial returns has been extensively modelled, most existing stochastic volatility models either assume a constant degree of return shock asymmetry or impose symmetric model innovations. However, accounting for time-
Iseringhausen, Martin
core   +1 more source

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