Results 21 to 30 of about 1,261 (252)
Ensemble Improved Permutation Entropy: A New Approach for Time Series Analysis
Entropy, 2023 Entropy quantification approaches have gained considerable attention in engineering applications. However, certain limitations persist, including the strong dependence on parameter selection, limited discriminating power, and low robustness to noise.
Zhe Chen +3 more
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IEEE Access, 2020 Gear transmission is one of the most commonly used transmission methods in mechanical equipment. By analyzing the vibration data of gearbox, an improved deep belief network (DBN) algorithm for gear fault diagnosis based on wavelet packet energy entropy ...
Dongying Han, Xiaoci Guo, Peiming Shi
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Multiscale permutation entropy analysis of electroencephalogram
Acta Physica Sinica, 2014 We carried out a detailed analysis and a comparison between normal and epileptic electroencephalogram (EEG) based on multiscale permutation entropy. The relationship between multiscale permutation entropy values of EEG and age, and the effect of scale factor on multiscale permutation entropy value were also discussed.
null Yao Wen-Po +3 more
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Multiscale based nonlinear dynamics analysis of heart rate variability signals.
PLoS ONE, 2020 Acceleration change index (ACI) is a fast and easy to understand heart rate variability (HRV) analysis approach used for assessing cardiac autonomic control of the nervous systems.
Syed Zaki Hassan Kazmi +5 more
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Bearing Fault Diagnosis Based on Multiscale Permutation Entropy and Support Vector Machine
Entropy, 2012 Bearing fault diagnosis has attracted significant attention over the past few decades. It consists of two major parts: vibration signal feature extraction and condition classification for the extracted features.
Jian-Jiun Ding +4 more
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Information, 2022 Recognition of biological tissue denaturation is a vital work in high-intensity focused ultrasound (HIFU) therapy. Multiscale permutation entropy (MPE) is a nonlinear signal processing method for feature extraction, widely applied to the recognition of ...
Ziqi Peng, Xian Zhang, Jing Cao, Bei Liu
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Entropy, 2021 Wind turbine gearboxes operate in harsh environments; therefore, the resulting gear vibration signal has characteristics of strong nonlinearity, is non-stationary, and has a low signal-to-noise ratio, which indicates that it is difficult to identify wind
Xiaoan Yan +3 more
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Multiscale permutation entropy analysis of laser beam wandering in isotropic turbulence [PDF]
Physical Review E, 2017 We have experimentally quantified the temporal structural diversity from the coordinate fluctuations of a laser beam propagating through isotropic optical turbulence. The main focus here is on the characterization of the long-range correlations in the wandering of a thin Gaussian laser beam over a screen after propagating through a turbulent medium. To
Olivares, Felipe +4 more
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Shock and Vibration, 2021 Research on damage diagnosis or safety monitoring based on structural vibration response is one of the hot issues in the engineering field. The characteristic information of the structure is obtained by analyzing the structure response data.
Jianwei Zhang +4 more
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Shock and Vibration, 2019 The cracking of piezoelectric ceramics is the main reason of failure of an ultrasonic motor. Since the fault information is too weak to reflect the condition of piezoelectric ceramics especially in the early degradation stage, a fault feature extraction ...
Guoqing An, Hongru Li
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