Results 61 to 70 of about 4,385,729 (229)

Comparison of Statistical Underlying Systematic Risk Factors and Betas Driving Returns on Equities

open access: yesRevista Mexicana de Economía y Finanzas Nueva Época REMEF, 2021
The objective of this paper is to compare four dimension reduction techniques used for extracting the underlying systematic risk factors driving returns on equities of the Mexican Market.
Rogelio Ladrón de Guevara Cortés   +2 more
doaj   +1 more source

A stochastic algorithm for probabilistic independent component analysis

open access: yes, 2012
The decomposition of a sample of images on a relevant subspace is a recurrent problem in many different fields from Computer Vision to medical image analysis.
Allassonniére, Stéphanie   +1 more
core   +1 more source

Motion process monitoring using optical flow–based principal component analysis-independent component analysis method

open access: yesAdvances in Mechanical Engineering, 2017
In this article, for the first time, the optical flow and principal component analysis followed independent component analysis are combined for monitoring the motion process of robotic-arm-based system.
Song Fan   +3 more
doaj   +1 more source

Data-driven human transcriptomic modules determined by independent component analysis

open access: yesBMC Bioinformatics, 2018
Background Analyzing the human transcriptome is crucial in advancing precision medicine, and the plethora of over half a million human microarray samples in the Gene Expression Omnibus (GEO) has enabled us to better characterize biological processes at ...
Weizhuang Zhou, Russ B. Altman
doaj   +1 more source

Robust Independent Component Analysis Based on Two Scatter Matrices

open access: yesAustrian Journal of Statistics, 2016
Oja, Sirkiä, and Eriksson (2006) and Ollila, Oja, and Koivunen (2007) showed that, under general assumptions, any two scatter matrices with the so called independent components property can be used to estimate the unmixing matrix for the independent ...
Klaus Nordhausen, Hannu Oja, Esa Ollila
doaj   +1 more source

Robust Independent Component Analysis via Minimum Divergence Estimation [PDF]

open access: yes, 2012
Independent component analysis (ICA) has been shown to be useful in many applications. However, most ICA methods are sensitive to data contamination and outliers. In this article we introduce a general minimum U-divergence framework for ICA, which covers
Chen, Peng-Wen   +4 more
core  

A Feature-Selective Independent Component Analysis Method for Functional MRI

open access: yesInternational Journal of Biomedical Imaging, 2007
In this work, we propose a simple and effective scheme to incorporate prior knowledge about the sources of interest (SOIs) in independent component analysis (ICA) and apply the method to estimate brain activations from functional magnetic resonance ...
Yi-Ou Li, Tülay Adali, Vince D. Calhoun
doaj   +1 more source

Independent component analysis based on quantum particle swarm optimization

open access: yesEgyptian Informatics Journal, 2018
One of the Digital Signal Processing problems is a Blind Source Separation (BSS). There are some of methods are employed to solve this problem which are so-called Independent Component Analysis (ICA) which based on the statistical distribution of the ...
Nidaa AbdulMohsin Abbas   +1 more
doaj   +1 more source

Estimation of the Number of Endmembers in Hyperspectral Images Using Agglomerative Clustering

open access: yesRemote Sensing, 2020
Many tasks in hyperspectral imaging, such as spectral unmixing and sub-pixel matching, require knowing how many substances or materials are present in the scene captured by a hyperspectral image.
José Prades   +3 more
doaj   +1 more source

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