| Method used | Features extracted |
| Analysis in time | Mean, skewness, kurtosis, entropy, median, mode, entropy, fuzzy entropy, Hurst exponent, variance, max, min, zero crossings, line length, energy, power, Shannon entropy, sample entropy, approximate, and standard deviation | Analysis in frequency | Spectral energy, peak frequency, median frequency, spectral power, and spectral entropy | Time/frequency combination | Line length, min, max, standard deviation, energy, median, Shannon entropy, approximate entropy, and root mean square | Wavelet analysis | Variation, bounded variation, relative power, relative scale energy, coefficients, energy, entropy, relatively bounded, variance, and standard deviation |
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