Results 21 to 30 of about 105,587 (248)

Nonlinear Dynamics of Heart Rate Variability after Acutely Induced Myocardial Ischemia by Percutaneous Transluminal Coronary Angioplasty

open access: yesEntropy, 2023
Several heart rate variability (HRV) characteristics of patients with myocardial ischemia are associated with a higher mortality risk. However, the immediate effect of acute ischemia on the HRV nonlinear dynamical behavior is unknown.
Martín Calderón-Juárez   +3 more
doaj   +1 more source

A Novel Approach for Classification and Forecasting of Time Series in Particle Accelerators

open access: yesInformation, 2021
The beam interruptions (interlocks) of particle accelerators, despite being necessary safety measures, lead to abrupt operational changes and a substantial loss of beam time.
Sichen Li   +6 more
doaj   +1 more source

Color Recurrence Plots for Bearing Fault Diagnosis

open access: yesSensors, 2022
This paper presents bearing fault diagnosis using the image classification of different fault patterns. Feature extraction for image classification is carried out using a novel approach of Color recurrence plots, which is presented for the first time.
Vilma Petrauskiene   +4 more
openaire   +3 more sources

On the boundedness of running-in attractors based on recurrence plot and recurrence qualification analysis

open access: yesFriction, 2019
A feature parameter was proposed to quantitatively explore the boundedness of running-in attractors; its variation throughout the friction process was also investigated.
Guodong Sun   +4 more
doaj   +1 more source

Stickiness and recurrence plots: An entropy-based approach

open access: yesChaos: An Interdisciplinary Journal of Nonlinear Science, 2023
The stickiness effect is a fundamental feature of quasi-integrable Hamiltonian systems. We propose the use of an entropy-based measure of the recurrence plots (RPs), namely, the entropy of the distribution of the recurrence times (estimated from the RP), to characterize the dynamics of a typical quasi-integrable Hamiltonian system with coexisting ...
Matheus R. Sales   +6 more
openaire   +5 more sources

Dual Supervised Autoencoder Based Trajectory Classification Using Enhanced Spatio-Temporal Information

open access: yesIEEE Access, 2020
With the rapid development of mobile internet and location awareness techniques, massive spatio-temporal data is collected every day. Trajectory classification is critically important to many real-world applications such as human mobility understanding ...
Sichong Lu, Ying Xia
doaj   +1 more source

Recurrence Plot Analysis of Unsatured Polyester Samples Subjected to Contamination

open access: yesElectrica, 2018
Polymer materials thatare used in outdoor enviroments are exposed to humidity and polution. Inaddition, some insulation materials installed in water or embeded to slushcontaining serious pollutants for a long time.
Aysel Ersoy Yılmaz   +1 more
doaj   +1 more source

A historical review of recurrence plots [PDF]

open access: yesThe European Physical Journal Special Topics, 2008
In the last two decades recurrence plots (RPs) were introduced in many different scientific disciplines. It turned out how powerful this method is. After introducing approaches of quantification of RPs and by the study of relationships between RPs and fundamental properties of dynamical systems, this method attracted even more attention. After 20 years
openaire   +3 more sources

Time-Lapse Image Method for Classifying Appliances in Nonintrusive Load Monitoring

open access: yesEnergies, 2021
In this paper, a time-lapse image method is proposed to improve the classification accuracy for multistate appliances with complex patterns based on nonintrusive load monitoring (NILM).
Joonho Seon   +3 more
doaj   +1 more source

Cross recurrence plot based synchronization of time series [PDF]

open access: yesNonlinear Processes in Geophysics, 2002
The method of recurrence plots is extended to the cross recurrence plots (CRP) which, among others, enables the study of synchronization or time differences in two time series.
N. Marwan, M. Thiel, N. R. Nowaczyk
doaj  

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