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1.
Nonlinear time series and principal component analyses: Potential diagnostic tools for COVID-19 auscultation
SANKARARMAN S, SREEJYOTHI S, RENJINI A, RAJ VIMAL, SWAPNA MOHANACHANDRAN NAIR SINDHU, 2020, izvirni znanstveni članek

Opis: The development of novel digital auscultation techniques has become highly significant in the context of the outburst of the pandemic COVID 19. The present work reports the spectral, nonlinear time series, fractal, and complexity analysis of vesicular (VB) and bronchial (BB) breath signals. The analysis is carried out with 37 breath sound signals. The spectral analysis brings out the signatures of VB and BB through the power spectral density plot and wavelet scalogram. The dynamics of airflow through the respiratory tract during VB and BB are investigated using the nonlinear time series and complexity analyses in terms of the phase portrait, fractal dimension, Hurst exponent, and sample entropy. The higher degree of chaoticity in BB relative to VB is unwrapped through the maximal Lyapunov exponent. The principal component analysis helps in classifying VB and BB sound signals through the feature extraction from the power spectral density data. The method proposed in the present work is simple, cost-effective, and sensitive, with a far-reaching potential of addressing and diagnosing the current issue of COVID 19 through lung auscultation.
Najdeno v: ključnih besedah
Povzetek najdenega: ...analysis of vesicular (VB) and bronchial (BB) breath signals. The analysis is carried out with 37... ...The analysis is carried out with 37 breath sound signals. The spectral analysis brings out the...
Ključne besede: Breath sound analysis, Fractal dimension, Nonlinear time series analysis, Sample entropy, Hurst exponent, Principal component analysis
Objavljeno: 28.06.2022; Ogledov: 138; Prenosov: 0
.pdf Polno besedilo (2,73 MB)

2.
Nonlinear signal processing, spectral, and fractal based stridor auscultation: A machine learning approach
SWAPNA MOHANACHANDRAN NAIR SINDHU, 2022, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ... Breath sound, fractal, linear discriminant analysis, nonlinear time...
Ključne besede: Breath sound, fractal, linear discriminant analysis, nonlinear time series, stridor.
Objavljeno: 06.07.2022; Ogledov: 145; Prenosov: 0
.pdf Polno besedilo (3,34 MB)

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