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In order to solve problems as high error diffusion and instable convergence of Recursive Least Squares (RLS) algorithm in Code Division Multiple Access (CDMA), this paper combined local steepest drop characteristic of steepest descent algorithm presented a stable convergence and lower complexity algorithm -- D-RLS in condition of high multiple access interference (MAI) and intersymbol interference...
Co polymerization of chitosan selectively grafted by polyethylene glycol was studied in this paper. The graft copolymers can be expected to be used as DNA delivery vectors because of the improving hydrophilicity of chitosan and reserving the amino groups on chitosan chains. Chitosan was selectively grafted by monomethoxy polyethylene glycol(mPEG-OH), which contains a hydroxyl group combining with...
An input shaping algorithm based on convex optimization techniques is presented for the design of reference and feedforward signals in a closed-loop discrete-time linear time-invariant system. The proposed algorithm allows closed-loop signals to be subjected to linear constraints on amplitude and rate of change. As an illustrative example the seeking process in a hard disk drive is investigated. The...
BP gets local minimization too easily and converges slowly and could not get the global optima. To solve these problems, this paper proposes GA-BP algorithm to predict the purity of vitamin E in obtaining the purity of vitamin E with molecular distillation. The genetic algorithm is applied to optimize the weights of BP neural network and the combination of the advantages of two arithmetic improves...
Recently, we have proposed a handwriting Chinese character database HIT-OR3C. Though it has been introduced in detail, to date, it has not been evaluated by any handwriting recognition method. To help the researchers use this database for algorithm evaluation, we propose the structure of HIT-OR3C database. Moreover, we evaluate the OR3C database with a series of experiments using state-of-the-art...
Multiple access interference (MAI) and related Near-far Problem (FNP), limit the development of the Code Division Multiple Access (CDMA) system. The classic Minimum Mean Square Error-MUD (MMSE-MUD) algorithm can effectively suppress MAI. But too much error will be introduced into the approximate estimation and its computation complexity is too high. To solve this problem, this paper presents an improved...
In this paper, an image similarity matching retrieval algorithm based on synergetic neural network (SNN) is proposed. It is a novel method with advantages of no pseudo-state and closer to natural self-organization process in the field of image retrieval. It utilizes feature vector extraction, attention parameter selection, order parameter calculation, pseudo-inverse matrix and its determinant value...
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