Classification of surface EMG signal based on wavelet transform with nonlinear scale / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 1232-1236, 2006.
Artículo
en Chino
| WPRIM
| ID: wpr-331441
ABSTRACT
Surface EMG (sEMG) signal is a complex nonlinear, non-stationary signal. In this paper, wavelet transform with nonlinear scale (NWT) is introduced. Due to the gradual shortening of its time-resolution, NWT is good at extracting the precise time-frequency information from sEMG signal. First, every sEMG signal (30 sets are for forearm supination and 30 sets are for forearm pronation) is transformed into intensity distribution (time-frequency distribution) by NWT. And then the feature vector is determined from the characteristic roots which are obtained from the intensity distribution by principle component analysis. At last, the two patterns of sEMG signals are identified by BP neural network. The results show that the accurate classification rate is higher gained by NWT than by two conventional time-frequency distributions. At the same time, the calculating complexity of neural network is decreased greatly.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Fisiología
/
Procesamiento de Señales Asistido por Computador
/
Redes Neurales de la Computación
/
Análisis de Componente Principal
/
Electromiografía
/
Músculos
Tipo de estudio:
Estudio pronóstico
Límite:
Humanos
Idioma:
Chino
Revista:
Journal of Biomedical Engineering
Año:
2006
Tipo del documento:
Artículo
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