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Huizhou, China

Shi H.,Huizhou University
2012 IEEE International Conference on Information and Automation, ICIA 2012

An Anchor-optimized modified weighted centroid localization algorithm based on RSSI was proposed. Firstly, the algorithm optimize the anchor nodes according to the distance from the unknown node to the anchor nodes, and then it select the nearest four anchors to localize, the reciprocal of the sum of measured distance was be taken as the weigh. Finally the weights were modified so as to further improving the precision. Simulation results show that the algorithm accuracy has been significantly improved than the centroid algorithm and weighted centroid algorithm. © 2012 IEEE. Source

Experimental observation of spatial solitons in azobenzene-doped organic polymer is demonstrated in dye-doped polymer bulk material. Solitons cannot only be formed in this material with linearly polarized light, but also with circularly polarized light. An interesting phenomenon is revealed that the soliton is polarization-dependent. The solitons with the same intensity but with different polarizations have different widths. The experimental results are further theoretically explained with the dynamics model based on a photochemical process, namely photoisomerization. © 2011 Elsevier B.V. Source

Jiang H.,Renmin University of China | Jiang H.,Huizhou University | He W.,Fujian University of Technology
Expert Systems with Applications

Support vector regression (SVR) has often been applied in the prediction of financial time series with many characteristics. On account of much time consumption of global SVR, local machines are carried out to accelerate the computation. In this paper, we introduce local grey SVR (LG-SVR) integrated grey relational grade with local SVR for financial time series forecasting. Pattern search method and leave-one-out errors are adopted for model selection. Experimental results of three real financial time series prediction demonstrate that LG-SVR can speed up computing speed and improve prediction accuracy. © 2011 Elsevier Ltd. All rights reserved. Source

The prediction is experimentally confirmed that bright spatial solitons can be formed in spontaneously selfdefocusing azo-doped polymers through a photoisomerization process, namely, angular hole burning. The experiments are actually the realization of a scheme of light-controlling light. Both linearly polarized and circularly polarized light can propagate as solitons in such media. The solitons with the same intensity but with different polarizations have different widths. The experimental results are further theoretically explained. © 2010 Optical Society of America. Source

Ying Y.,Huizhou University
Chaos (Woodbury, N.Y.)

This paper considers the problem of finite time control for a class of time-varying unified chaotic system. First, based on the finite-time stability theory, a novel adaptive control technique is presented to achieve finite-time stabilization for time-varying unified chaotic system. Comparing with the existing methods, the proposed controller only need to be added on one state variable of systems and it is easy to be implemented. Then, a finite time control technique is provided to realize the tracking of any target function with second-order derivatives. Finally, Simulation results are provided to show the effectiveness of the proposed method. Source

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