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Ubiratan S. Freitas
Ubiratan S. Freitas
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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
602009
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
552005
Frequently asked questions about global modeling.
C Letellier, LA Aguirre, US Freitas
Chaos (Woodbury, NY) 19 (2), 023103, 2009
542009
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
532001
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
252014
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
252010
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
192013
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
142012
Working conditions for safe detection of nonlinearity and noise titration
E Roulin, US Freitas, C Letellier
Physical Review E 83 (4), 046225, 2011
102011
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
92014
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
61998
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
52015
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
52000
Leakage estimation using Kalman filtering in noninvasive mechanical ventilation
GG Rodrigues, US Freitas, D Bounoiare, LA Aguirre, C Letellier
IEEE, 2013
42013
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
42009
Uso de técnicas de detecão de estrutura na identificação de modelos dinâmicos não lineares contínuos polinomiais
US Freitas
Universidade Federal de Minas Gerais, 2001
22001
ANÁLISE DAS INTERAÇÕES PACIENTE-VENTILADOR DURANTE VENTILAÇÃO MECÂNICA NÃO INVASIVA NOTURNA UTILIZANDO GRÁFICOS DE RECORRÊNCIAS CONJUNTAS
GG Rodrigues, LA Aguirre, US Freitas, C Letellier
2*
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
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