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PCA sets and convexity [PDF]

open access: bronzeFundamenta Mathematicae, 2000
Summary: Three sets occurring in functional analysis are shown to be of class PCA (also called \(\Sigma_2^1)\) and to be exactly of that class. The definition of each set is close to the usual objects of modern analysis, but some subtlety causes the sets to have a greater complexity than expected.
Robert Kaufman
openalex   +4 more sources

PCA of waveforms and functional PCA: A primer for biomechanics [PDF]

open access: yesJournal of Biomechanics, 2021
Principal components analysis (PCA) of waveforms and functional PCA (fPCA) are statistical approaches used to explore patterns of variability in biomechanical curve data, with fPCA being an accepted statistical method grounded within the functional data analysis (FDA) statistical framework.
Norma Bargary   +7 more
openaire   +2 more sources

Tangent Phylogenetic PCA [PDF]

open access: yes, 2023
Phylogenetic PCA (p-PCA) is a version of PCA for observations that are leaf nodes of a phylogenetic tree. P-PCA accounts for the fact that such observations are not independent, due to shared evolutionary history. The method works on Euclidean data, but in evolutionary biology there is a need for applying it to data on manifolds, particularly shapes ...
Akhøj, Morten   +2 more
openaire   +4 more sources

Singular Learning of Deep Multilayer Perceptrons for EEG-Based Emotion Recognition

open access: yesFrontiers in Computer Science, 2021
Human emotion recognition is an important issue in human–computer interactions, and electroencephalograph (EEG) has been widely applied to emotion recognition due to its high reliability.
Weili Guo   +6 more
doaj   +1 more source

Effectiveness of UV-Visible Spectroscopy (with Multi-Mode Plate Reader) and ATR-FTIR for the Discrimination of Black Marker Inks

open access: yesArab Journal of Forensic Sciences & Forensic Medicine, 2023
In the ambit of Forensic examination of the questioned documents, writing instruments often serve as an essential tool in disclosing the legitimacy of a document.
Pawan Gupta   +3 more
doaj   +1 more source

PCA-kernel estimation [PDF]

open access: yesStatistics & Risk Modeling, 2012
Abstract Many statistical estimation techniques for high-dimensional or functional data are based on a preliminary dimension reduction step, which consists in projecting the sample X 1,...,X n onto the first D eigenvectors of the Principal Component Analysis ...
Biau, Gérard, Mas, André
openaire   +4 more sources

PCA Rerandomization

open access: yesCanadian Journal of Statistics, 2023
AbstractMahalanobis distance of covariate means between treatment and control groups is often adopted as a balance criterion when implementing a rerandomization strategy. However, this criterion may not work well for high‐dimensional cases because it balances all orthogonalized covariates equally.
Hengtao Zhang   +2 more
openaire   +2 more sources

Hybrid modeling and prediction of oyster norovirus outbreaks

open access: yesJournal of Water and Health, 2021
This paper presents a hybrid model for predicting oyster norovirus outbreaks by combining the Artificial Neural Networks (ANNs) and Principal Component Analysis (PCA) methods and using the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite ...
Shima Shamkhali Chenar, Zhiqiang Deng
doaj   +1 more source

Geodesic PCA in the Wasserstein space by convex PCA [PDF]

open access: yesAnnales de l'Institut Henri Poincaré, Probabilités et Statistiques, 2017
We introduce the method of Geodesic Principal Component Analysis (GPCA) on the space of probability measures on the line, with finite second moment, endowed with the Wasserstein metric. We discuss the advantages of this approach, over a standard functional PCA of probability densities in the Hilbert space of square-integrable functions.
Jérémie Bigot   +4 more
openaire   +5 more sources

Principal component analysis of a canning determinate tomato collection in the IPGR, Sadovo - Bulgaria [PDF]

open access: yesAgroznanje, 2012
The success of a tomato breeding programme largely depends on the study of initial material and symptoms studied as well as manifestations of dependence between them. The study was conducted during the period 2008-2011 in the IPGR, Bulgaria.
Krasteva Liliya   +2 more
doaj   +1 more source

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