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Initial Steps towards a Multilevel Functional Principal Components Analysis Model of Dynamical Shape Changes [PDF]
Journal of Imaging, 2023 In this article, multilevel principal components analysis (mPCA) is used to treat dynamical changes in shape. Results of standard (single-level) PCA are also presented here as a comparison. Monte Carlo (MC) simulation is used to create univariate data (i.
Damian J. J. Farnell, Peter Claes
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New Modeling Approaches Based on Varimax Rotation of Functional Principal Components
Mathematics, 2020 Functional Principal Component Analysis (FPCA) is an important dimension reduction technique to interpret the main modes of functional data variation in terms of a small set of uncorrelated variables.
Christian Acal +2 more
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A Multi-Dimensional Functional Principal Components Analysis of EEG Data [PDF]
Biometrics, 2017 Damla Senturk +2 more
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Optimal Estimation of Large Functional and Longitudinal Data by Using Functional Linear Mixed Model
Mathematics, 2022 The estimation of large functional and longitudinal data, which refers to the estimation of mean function, estimation of covariance function, and prediction of individual trajectory, is one of the most challenging problems in the field of high ...
Mengfei Ran, Yihe Yang
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Forecasting, 2022 We propose a functional time series method to obtain accurate multi-step-ahead forecasts for age-specific mortality rates. The dynamic functional principal component analysis method is used to decompose the mortality curves into dynamic functional ...
Ufuk Beyaztas, Hanlin Shang
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Wildfires Vegetation Recovery through Satellite Remote Sensing and Functional Data Analysis
Mathematics, 2021 In recent years, wildfires have caused havoc across the world, which are especially aggravated in certain regions due to climate change. Remote sensing has become a powerful tool for monitoring fires, as well as for measuring their effects on vegetation ...
Feliu Serra-Burriel +2 more
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COVID-19 Data Imputation by Multiple Function-on-Function Principal Component Regression
Mathematics, 2021 The aim of this paper is the imputation of missing data of COVID-19 hospitalized and intensive care curves in several Spanish regions. Taking into account that the curves of cases, deceases and recovered people are completely observed, a function-on ...
Christian Acal +3 more
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Sensors, 2021 In this paper, we group South American countries based on the number of infected cases and deaths due to COVID-19. The countries considered are: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru, Paraguay, Uruguay, and Venezuela.
Carlos Martin-Barreiro +4 more
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Multi-band MEG signatures of BOLD connectivity reorganization during visuospatial attention
NeuroImage, 2021 The functional architecture of the resting brain, as measured with the blood oxygenation level-dependent functional connectivity (BOLD-FC), is slightly modified during task performance.
Chiara Favaretto +6 more
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Functional Principal Components Analysis of Shanghai Stock Exchange 50 Index
Discrete Dynamics in Nature and Society, 2014 The main purpose of this paper is to explore the principle components of Shanghai stock exchange 50 index by means of functional principal component analysis (FPCA).
Zhiliang Wang, Yalin Sun, Peng Li
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