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In this paper, we present automatic classification models for ultrasonic flaw signals acquired from carbon-fiber-reinforced polymer specimens. Different state-of-the-art strategies based on wavelet transform are utilized for feature extraction. Furthermore, a wavelet packet transform-based local energy feature extraction method is proposed to solve the deficiencies of the existing methods. Artificial...
For recognizing the movement intent of amputee, surface electromyogram signals which can reflect movement intent and can be measured without invasion were applied to identify movement transition. Wavelet packet transform was applied to analyze the electromyogram signal, extract its frequency feature and recognize movement. The result of this study indicates that if the suitable coefficients were selected,...
The paper proposed a locomotion simulation method of the lower limb EMG-prosthesis based on OpenGL. Firstly, the raw surface EMG and real knee angle are stored, and the features of surface EMG are extracted after preprocessed and transformed with Wavelet Packet. Secondly, the model of EMG is built with Support Vector Machine, and the knee angles of prosthesis are forecasted during the whole gait cycle...
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