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This paper presents a new wavelet domain adaptive despeckling technique for contrast enhancement of medical ultrasound (US) images for improving the clinical diagnosis. This method uses the Rayleigh distribution for modeling the speckle wavelet coefficients and the signal wavelet coefficients are approximated using the Gaussian distribution. Combining these as statistical priors, we have developed...
The conversion of aqueous ethanol to hydrocarbons, over HZSM-5 of silica-alumina ratio 206 and 40, is described. The effect of temperature (673-773 K) on product distribution reveals definite trends. The yield and distribution of the products were influenced by catalyst-binder (alumina) composition, dilution of feed and the silica-alumina ratio of the catalyst. It is seen that light olefins can be...
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