Results 31 to 40 of about 721 (133)

A Differential Biomarker Based on Recurrence Quantification Analysis of EEG Signal and Genetic Algorithm for Epilepsy Diagnosis [PDF]

Journal of Artificial Intelligence and System Modelling
Selecting features with strong discriminatory capabilities is crucial for data classification challenges. Recurrence Quantification Analysis (RQA) is a promising technique for detecting seizures without assuming stationary conditions, accommodating ...
Vanithamani Palanisamy, A Ranichitra, Radhamani Ellapparaj   +2 more
doaj   +1 more source

Improving the understanding of sleep apnea characterization using Recurrence Quantification Analysis by defining overall acceptable values for the dimensionality of the system, the delay, and the distance threshold. [PDF]

PLoS ONE, 2018
Our contribution focuses on the characterization of sleep apnea from a cardiac rate point of view, using Recurrence Quantification Analysis (RQA), based on a Heart Rate Variability (HRV) feature selection process.
Sofía Martín-González, Juan L Navarro-Mesa, Gabriel Juliá-Serdá, G Marcelo Ramírez-Ávila, Antonio G Ravelo-García   +4 more
doaj   +1 more source

Nonlinear analysis of gravitational wave signals based on recurrence quantification analysis

MATEC Web of Conferences, 2018
Recurrence plot and recurrence quantification analysis are used to analyze different features of gravitational wave signals. Firstly, the appropriate delay time and embedding dimension are respectively estimated by methods of the C_C method.
Fan Zhenyan, Chen Qianqian, Sun Guiqi, Mastorakis Nikos, Zhuang Xiaodong   +4 more
doaj   +1 more source

A New Process Monitoring Method Based on Waveform Signal by Using Recurrence Plot

Entropy, 2015
Process monitoring is an important research problem in numerous areas. This paper proposes a novel process monitoring scheme by integrating the recurrence plot (RP) method and the control chart technique.
Cheng Zhou, Weidong Zhang
doaj   +1 more source

Recurrence quantification analysis for fine-scale characterisation of arrhythmic patterns in cardiac tissue

Scientific Reports, 2023
This paper uses recurrence quantification analysis (RQA) combined with entropy measures and organization indices to characterize arrhythmic patterns and dynamics in computer simulations of cardiac tissue.
Radek Halfar, Brodie A. J. Lawson, Rodrigo Weber dos Santos, Kevin Burrage   +3 more
doaj   +1 more source

Quantitative Analysis Using Consecutive Time Window for Unobtrusive Atrial Fibrillation Detection Based on Ballistocardiogram Signal

Sensors, 2022
Atrial fibrillation (AF) is the most common clinically significant arrhythmia; therefore, AF detection is crucial. Here, we propose a novel feature extraction method to improve AF detection performance using a ballistocardiogram (BCG), which is a weak ...
Tianqing Cheng, Fangfang Jiang, Qing Li, Jitao Zeng, Biyong Zhang   +4 more
doaj   +1 more source

Investigation of Tactile Perception Evoked by Ridged Texture Using ERP and Non-linear Methods

Frontiers in Neuroscience, 2021
The triangular ridged surface can improve the grip reliability of products, but the sharp edge of triangular ridge induces sharp and uncomfortable feeling.
Wei Tang, Meimei Zhang, Guofang Chen, Rui Liu, Yuxing Peng, Si Chen, Yibing Shi, Chunai Hu, Shengjie Bai   +8 more
doaj   +1 more source

Nonlinear dynamics in Divisia monetary aggregates: an application of recurrence quantification analysis

Financial Innovation, 2023
We construct recurrence plots (RPs) and conduct recurrence quantification analysis (RQA) to investigate the dynamic properties of the new Center for Financial Stability (CFS) Divisia monetary aggregates for the United States.
Ioannis Andreadis, Athanasios D. Fragkou, Theodoros E. Karakasidis, Apostolos Serletis   +3 more
doaj   +1 more source

Response Identification in a Vibration Energy-Harvesting System with Quasi-Zero Stiffness and Two Potential Wells

Energies, 2021
In this paper, the frequency broadband effect in vibration energy harvesting was studied numerically using a quasi-zero stiffness resonator with two potential wells and piezoelectric transducers.
Joanna Iwaniec, Grzegorz Litak, Marek Iwaniec, Jerzy Margielewicz, Damian Gąska, Mykhaylo Melnyk, Wojciech Zabierowski   +6 more
doaj   +1 more source

Analyzing the hydrological dynamics of a pristine and a regulated river in northern Europe’s sub-Arctic using recurrence theory

Hydrology Research
Examining hydrological variability is essential for understanding system dynamics and supporting effective water resource management. Recurrence analysis, a nonlinear time series technique, can uncover hidden patterns in hydrometeorological data through ...
Adarsh S, Susan Mariam Rajesh, B Muraleekrishnan, Sumayah Santhoshkhan, Naveen Joseph, Alireza Sharifi, Nasim Fazel, Hannu Marttila, Ali Torabi Haghighi   +8 more
doaj   +1 more source