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In this paper, the Wavelet Transform (WT) and Hilbert-Huang Transform (HHT) are adopted to analyze the blood flow signals in the common carotid arteries and the blood pressure signals in the ipsilateral common femoral arteries in Spontaneously Hypertensive Rats (SHRs) and Wistar Kyoto Rats (WKYs). Five characteristic peaks are extracted and compared by t-test to assess the physiological differences...
Forest fire detection includes satellite monitoring, manual monitoring, aerial survey and so on. Compared with these expensive ways, a more practical fireproofing surveillance system needs to be built. An image capture system can be set up in the tower to sent fire image back to the command centre, using the short wave radios equipped for manual monitoring in the towers. Considering the finitude of...
Signals output from the gyros usually contain turbulent noise, which comes down the signal accuracy and lowers the systemspsila function. So denoising is necessary. an algorithm, based on three-layer wavelet packet transform of semisoft threshold, was applied to process the gyropsilas state signal. The decomposition coefficient of each node was got from the decomposition of third-layer wavelet packet...
This paper proposes a high performance facial expression recognition method based on wavelet energy feature (WEF). As wavelet energy feature can discriminate the texture of expression images, it is used in facial expression recognition for the first time. Fisher's linear discriminants (FLD) can describe the details of the image, so we combine FLD with WEF. WEF is added to the image first, and then...
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