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IEEE Spectrum
Classification of EEG signals using the wavelet transform
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The wavelet transform, time-frequency localization and signal analysis
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Input feature selection for classification problems
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Classification of EEG signals using relative wavelet energy and artificial neural networks
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Analysis of human PPG, ECG and EEG signals by eigenvector methods
Digital Signal Processing
Fractal QRS-complexes pattern recognition for imperative cardiac arrhythmias
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Expert Systems with Applications: An International Journal
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International Journal of Mobile Learning and Organisation
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This paper presents the experimental pilot study to investigate the effects of pulsed electromagnetic field (PEMF) at extremely low frequency (ELF) in response to photoplethysmographic (PPG), electrocardiographic (ECG), electroencephalographic (EEG) activity. The assessment of wavelet transform (WT) as a feature extraction method was used in representing the electrophysiological signals. Considering that classification is often more accurate when the pattern is simplified through representation by important features, the feature extraction and selection play an important role in classifying systems such as neural networks. The PPG, ECG, EEG signals were decomposed into time-frequency representations using discrete wavelet transform (DWT) and the statistical features were calculated to depict their distribution. Our pilot study investigation for any possible electrophysiological activity alterations due to ELF PEMF exposure, was evaluated by the efficiency of DWT as a feature extraction method in representing the signals. As a result, this feature extraction has been justified as a feasible method.