scholarly journals Forecasting intra-hour solar photovoltaic energy by assembling wavelet based time-frequency analysis with deep learning neural networks

2021 ◽  
pp. 107777
Author(s):  
Fermín Rodríguez ◽  
Iñigo Azcárate ◽  
Javier Vadillo ◽  
Ainhoa Galarza
Keyword(s):  
Neural Networks ◽  
Deep Learning ◽  
Frequency Analysis ◽  
Solar Photovoltaic ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Photovoltaic Energy

scholarly journals Atrial Fibrillation Identification With PPG Signals Using a Combination of Time-Frequency Analysis and Deep Learning

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 172692-172706
Author(s):  
Peng Cheng ◽  
Zhencheng Chen ◽  
Quanzhong Li ◽  
Qiong Gong ◽  
Jianming Zhu ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Deep Learning ◽  
Frequency Analysis ◽  
Time Frequency Analysis ◽  
Time Frequency

scholarly journals application based comparison of statistical versus deep learning approaches to reciprocating compressor valve condition monitoring

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jason Kolodziej ◽  
Jacob Chesnes
Keyword(s):  
Deep Learning ◽  
Condition Monitoring ◽  
Frequency Analysis ◽  
Reciprocating Compressor ◽  
Learning Approaches ◽  
Early Assessment ◽  
Valve Seat ◽  
Repeated Impact ◽  
Time Frequency Analysis ◽  
Time Frequency

This paper presents a vibration-based condition monitoring approach for early assessment of valve wear in an industrial reciprocating compressor. Valve seat  wear is a common fault mode that is caused by repeated impact and accelerated by chatter. Seeded faults consistent with valve seat wear are installed on the head-side discharge valves of a Dresser-Rand ESH-1 industrial reciprocating compressor. Due to the cyclostationary nature of these units a time-frequency analysis is employed where targeted crank angle positions can isolate externally mounted, non-invasive, vibration measurements. A region-of-interest (ROI) is then extracted from the time-frequency analysis and used to train a suitably sized convolutional neural network (CNN). The proposed deep learning method is then compared against a similarly trained discriminant classifier using the same ROIs where features are extracted using texture and shape image statistics. Both methods achieve > 90% success with the CNN classification strategy nearing a perfect result.

Neuromuscular disease detection by neural networks and fuzzy entropy on time-frequency analysis of electromyography signals

2018 ◽  
Vol 35 (4) ◽  
pp. e12274 ◽  
Author(s):  
Marcela Vallejo ◽  
Carlos J. Gallego ◽  
L. Duque-Muñoz ◽  
Edilson Delgado-Trejos
Keyword(s):  
Neural Networks ◽  
Frequency Analysis ◽  
Neuromuscular Disease ◽  
Fuzzy Entropy ◽  
Disease Detection ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Electromyography Signals

Infant cry classification to identify asphyxia using time-frequency analysis and radial basis neural networks

2012 ◽  
Vol 39 (10) ◽  
pp. 9515-9523 ◽  
Author(s):  
M. Hariharan ◽  
J. Saraswathy ◽  
R. Sindhu ◽  
Wan Khairunizam ◽  
Sazali Yaacob
Keyword(s):  
Neural Networks ◽  
Frequency Analysis ◽  
Time Frequency Analysis ◽  
Infant Cry ◽  
Time Frequency ◽  
Radial Basis Neural Networks ◽  
Radial Basis
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