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In this paper, we study the asymptotic limit of a multidimensional non-isentropic radiation hydrodynamics model arising from astrophysics via non-relativistic regime. We first obtain the local existence of smooth solutions to the initial value problem. Then, we give a convergence result of the radiation hydrodynamics equations to the compressible and non-isentropic Euler equations.
In this paper, a new image retrieval method, which uses the two primary features of image cluster to retrieve image, i.e., the average color value and the number of pixels for each cluster, is proposed. In comparison with popular methods, since this method uses both color feature and structure feature, it is good to solve such a sort of image retrieval questions for two images that they are similar...
In this paper, a parametrization of two-dimensional wavelet filter system is used as a method to protect wavelet-based watermarks against unauthorized detection. This system is developed in terms of a novel transformation-shift unitary transform (SUT) of conjugate quadrature filter (CQF). The commonly used wavelet filters are only special cases of this system. Based on this system, a watermarking...
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