Results 41 to 50 of about 38,961 (295)
Entropy Analysis of Heart Rate Variability in Different Sleep Stages
, 2022 How the complexity or irregularity of heart rate variability (HRV) changes across different sleep stages and the importance of these features in sleep staging are not fully understood. This study aimed to investigate the complexity or irregularity of the
Yang Li +6 more
core +1 more source
Sample entropy analysis of cervical neoplasia gene-expression signatures
BMC Bioinformatics, 2009 Background We introduce Approximate Entropy as a mathematical method of analysis for microarray data. Approximate entropy is applied here as a method to classify the complex gene expression patterns resultant of a clinical sample set.
Salama Salama A +4 more
doaj +1 more source
Entropy in Investigation of Vasovagal Syndrome in Passive Head Up Tilt Test
Entropy, 2017 This paper presents an application of Approximate Entropy (ApEn) and Sample Entropy (SampEn) in the analysis of heart rhythm, blood pressure and stroke volume for the diagnosis of vasovagal syndrome.
Katarzyna Buszko +3 more
doaj +1 more source
Revisiting the volatility of bitcoin with approximate entropy
Cogent Economics & Finance, 2022 Two distinct and non-redundant understandings of volatility, as deviation from consistency, exist for a time-series: (1) exhibiting high standard deviation and, closer to the dictionary definition of the term, (2) appearing highly irregular and ...
Nassim Dehouche
doaj +1 more source
European Psychiatry, 2021 Introduction Attention deficit hyperactivity (ADHD) disorder is a common childhood neurodevelopmental disorder, and Methylphenidate (MPH) is a first-line therapeutic option for treating ADHD.However, how brain complexity and entropy changes with ...
F.H. Çetin +3 more
doaj +1 more source
Cell-based maximum-entropy approximants [PDF]
Computer Methods in Applied Mechanics and Engineering, 2015 In this paper, we devise cell-based maximum-entropy (max-ent) basis functions that are used in a Galerkin method for the solution of partial differential equations. The motivation behind this work is the construction of smooth approximants with controllable support on unstructured meshes. In the variational scheme to obtain max-ent basis functions, the
Millán, Daniel +2 more
openaire +6 more sources
Entropy Analysis of Neonatal Electrodermal Activity during the First Three Days after Birth
, 2022 The entropy-based parameters determined from the electrodermal activity (EDA) biosignal evaluate the complexity within the activity of the sympathetic cholinergic system.
Zuzana Kuderava +5 more
core +1 more source
Fault diagnosis of rolling bearing based on DWT-MFE and LSSVM
Xi'an Gongcheng Daxue xuebao, 2021 In view of the effects of non-stationary and nonlinear vibration signals on the accuracy of rolling bearing fault diagnosis, a rolling bearing fault diagnosis method was proposed based on discrete wavelet transform (DWT) and multi scale fuzzy entropy ...
Kaifeng WANG, Xiaohui ZHAO, Yanfang WEI
doaj +1 more source
The Entropy of the Angenent Torus is Approximately 1.85122 [PDF]
Experimental Mathematics, 2019 14 pages, 5 figures, Jupyter code included as ancillary file.
openaire +2 more sources
Blind source separation to enhance spectral and non-linear features of magnetoencephalogram recordings:Application to Alzheimer's disease [PDF]
, 2009 This work studied whether a blind source separation (BSS) and component selection procedure could increase the differences between Alzheimer's disease (AD) patients and control subjects' spectral and nonlinear features of magnetoencephalogram (MEG ...
Abasolo, Daniel +3 more
core +1 more source