Ubiratan S. Freitas
Ubiratan S. Freitas
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Using geometric control and chaotic synchronization to estimate an unknown model parameter
US Freitas, EEN Macau, C Grebogi
Physical Review E 71 (4), 047203, 2005
522005
Failure in distinguishing colored noise from chaos using the “noise titration” technique
US Freitas, C Letellier, LA Aguirre
Physical Review E 79 (3), 035201, 2009
512009
Structure-selection techniques applied to continuous-time nonlinear models
LA Aguirre, US Freitas, C Letellier, J Maquet
Physica D: Nonlinear Phenomena 158 (1), 1-18, 2001
512001
Frequently asked questions about global modeling.
C Letellier, LA Aguirre, US Freitas
Chaos (Woodbury, NY) 19 (2), 023103, 2009
442009
Identifying chaos from heart rate: The right task?
U Freitas, E Roulin, JF Muir, C Letellier
Chaos: An Interdisciplinary Journal of Nonlinear Science 19 (2), 028505-028505-4, 2009
402009
Remote Camera-based Pulse Oximetry
US Freitas
eTELEMED 2014, The Sixth International Conference on eHealth, Telemedicine …, 2014
132014
Dynamics underlying patient-ventilator interactions during nocturnal noninvasive ventilation
R Naeck, D Bounoiare, US Freitas, H Rabarimanantsoa, A Portmann, ...
International Journal of Bifurcation and Chaos 22 (02), 2012
132012
Automatic sleep staging from ventilator signals in non invasive ventilation
CCR Sady, US Freitas, A Portmann, JF Muir, C Letellier, LA Aguirre
Computers in Biology and Medicine 43 (7), 833–839, 2013
112013
Connecting curves for dynamical systems
R Gilmore, JM Ginoux, T Jones, C Letellier, US Freitas
Journal of Physics A: Mathematical and Theoretical 43 (25), 255101, 2010
112010
Working conditions for safe detection of nonlinearity and noise titration
E Roulin, US Freitas, C Letellier
Physical Review E 83 (4), 046225, 2011
92011
An easy-to-use technique to characterize cardiodynamics from first-return maps on ΔRR-intervals
E Fresnel, E Yacoub, U Freitas, A Kerfourn, V Messager, E Mallet, JF Muir, ...
Chaos: An Interdisciplinary Journal of Nonlinear Science 25 (8), 083111, 2015
42015
Recurrence Quantification Analysis as a Tool for Discrimination Among Different Dynamics Classes: The Heart Rate Variability Associated to Different Age Groups
L dos Santos, JJ Barroso, MF de Godoy, EEN Macau, US Freitas
Translational Recurrences, 125-136, 2014
42014
Higher-order spectra of nonlinear polynomial models for Chua's circuit
S Elgar, B Vanhoff, LA Aguirrre, US Freitas, V Chandran
International Journal of Bifurcation and Chaos 8 (12), 2425-2431, 1998
41998
Leakage estimation using Kalman filtering in noninvasive mechanical ventilation
GG Rodrigues, US Freitas, D Bounoiare, LA Aguirre, C Letellier
IEEE, 2013
32013
Close Return Plots for a Analysing Patient-ventilator Interactions during Nocturn Ventilation
C Letellier, D Bounoiare, R Naeck, US Freitas, A Portmann, A Cuvelier, ...
3rd International Conference on Complex Systems and Applications-ICCSA, 2009
32009
State space parsimonious reconstruction of attractor produced by an electronic oscillator
LA Aguirre, US Freitas, C Letellier, L Le Sceller, J Maquet
AIP Conference Proceedings 502, 649, 2000
32000
Estimação de Parâmetros em Sistemas Não Lineares Usando Controle Geométrico
US Freitas, EEN Macau
2*
Modifications of sleep quality and cardiac variability during initiation of domiciliary noninvasive ventilation in patients with chronic respiratory failure
R Naeck, D Bounoiare, A Portmann, U Freitas, F Portier, JF Muir, ...
FUNDAMENTAL & CLINICAL PHARMACOLOGY 26, 59-59, 2012
12012
Quantification de la fragmentation du sommeil par entropie de Shannon
D Bounoiare, R Naeck, US Freitas, A Portmann, A Cuvelier, JF Muir, ...
Résumés des exposés de la 14e Rencontre du Non-Linéaire Paris 2011, 28, 2011
12011
Ventilatory profiles under pressure support ventilation (PSV): a cycle-to-cycle distribution analysis during sleep
H Rabarimanantsoa, C Letellier, U Freitas, F Portier, LC Molano, ...
Am J Respir Crit Care Med 179, A3040, 2009
12009
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