Effects of time windowing on the estimated EMG parameters
CIE '96 Proceedings of the 19th international conference on Computers and industrial engineering
Phoneme recognition using wavelet based features
Information Sciences—Informatics and Computer Science: An International Journal - Special issue on recent advances in soft computing
The application of the Hilbert spectrum to the analysis of electromyographic signals
Information Sciences: an International Journal
Automatic identification of cardiac health using modeling techniques: A comparative study
Information Sciences: an International Journal
Information Sciences: an International Journal
Wavelet-based copyright-protection scheme for digital images based on local features
Information Sciences: an International Journal
Mean frequency derived via Hilbert-Huang transform with application to fatigue EMG signal analysis
Computer Methods and Programs in Biomedicine
Cross-entropy measure of uncertain variables
Information Sciences: an International Journal
Reversed version of a generalized sharp Hölder's inequality and its applications
Information Sciences: an International Journal
Derivation of an amplitude of information in the setting of a new family of fractional entropies
Information Sciences: an International Journal
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A new method, namely cross-fuzzy entropy (C-FuzzyEn) analysis, that can enable the measurement of the synchrony or similarity of patterns between two distinct signals, is presented in this study. With the inclusion of fuzzy sets, the similarity of vectors is fuzzily defined in C-FuzzyEn based on the exponential function and their shapes, rather than on the Heaviside function used in the conventional cross sample entropy (C-SampEn). Tests on simulated data sets and real EEG signals showed that C-FuzzyEn was superior to C-SampEn in several aspects, including giving the entropy definition in the case of small parameters, better relative consistency, and less dependence on record length. The proposed C-FuzzyEn was then applied for the analysis of simultaneously recorded electromyography (EMG) and mechanomyography (MMG) signals during sustained isometric contraction for monitoring local muscle fatigue. The results showed that the C-FuzzyEn of EMG-MMG signals decreased significantly during the development of muscle fatigue. The C-FuzzyEn showed a similar trend with the mean frequency (MNF) of EMG, the commonly used muscle fatigue indicator. However, C-FuzzyEn of EMG-MMG demonstrated a better robustness to the length of the analysis window in comparison with the MNF of EMG. The results suggested that the proposed C-FuzzyEn of EMG-MMG may potentially become a new reliable method for muscle fatigue assessment. It can also be applied to other bivariate signals extracted from complex systems with short data lengths in noisy backgrounds.