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This paper presents an H∞ controller design method for a class of Networked Control Systems (NCSs) with bounded packet dropouts. The state feedback closed-loop NCS is modeled as a Markov system. A sufficient condition for stochastic stability with an H∞ disturbance attenuation level is derived through a Lyapunov function, which is dependent on the upper bound of the number of consecutive packet dropouts...
We propose contourlet-based algorithms to extract local angle from seismic migrated images and attenuate seismic noise. Steerable pyramid and projection-filter-based complex wavelet transform have been used to extract seismic local angle, while curvelet transform and complex wavelet transform have been used to attenuate seismic noise. However, previously mentioned transforms either have a fixed number...
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