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According to the characteristics of the real data on the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), a two-dimensional (2-D) spectrum extraction method based on sparse reconstruction algorithm is proposed. The proposed method uses the corresponding flat-field images and calibration lamp images, respectively, to build the 2-D Gauss model. Then, a sparse reconstruction algorithm...
In this paper, the electromagnetic scattering of chiral body is analyzed by the newly developed generalized transition matrix (GTM). The scattering characteristics of a chiral body is represented as a GTM which describes the relationship between incident fields and scattered fields on a reference surface. The chiral body's scattered fields which are previously calculated by the method of mements (MoM)...
Cognitive radio has become an effective theory to solve the inefficiency of the spectrum usage, especially the energy detection in spectrum sensing technique. Recently several researches have focused on the performances of sensing using Gaussian approximation instead of real chi-square distribution based on central limit theory. In this paper, we specifically investigated the errors caused by approximation...
While Shamirpsilas identity-based public key cryptosystem does not need the certificates, the key escrow of userpsilas private keys is inherent in such scheme. In 2003,the concept of certificateless signature scheme was introduced. In this new paradigm, the necessity of certificates has been successfully removed and the key escrow problem does not exist. Based on the ideas of certificateless signatures...
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