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Articles by Xiaohong Hao
Total Records ( 2 ) for Xiaohong Hao
  Lizhen Wu , Xiaohong Hao and Chen Wang
  The voltage optimization control is one of the most important problems in distribution networks. In this paper a multi-objective voltage optimizes control modeling is presented, which including objectives that are the total active power losses; the voltage deviations of the bus and the total emission. Moreover, a new optimization algorithm based on a fuzzy improved Honey Bee Mating Optimization (HBMO) algorithm is proposed to determine the best operating point for reactive power generation and the active power generated by Wind turbine and Photovoltaic. In the proposed algorithm, the mating process is corrected; also a fuzzy clustering technique is used to control the size of the repository within the limits, where a set of non-dominated (Pareto) optimal solutions are stored. Finally, the proposed algorithm is tested on a typical IEEE 33-bus distribution test systems. The results of the simulation show the effectiveness of the proposed algorithm.
  Yan Yan and Xiaohong Hao
  A new method of robust reversible hiding algorithm is proposed in this study, which creates redundant space for information hiding by histogram shifting. Accommodation matrix used in this method reduced the modification extent of pixel values caused by histogram shifting and preserved the visual quality of stego-images. The design of interval region helped to realize the robustness of embedded information. Experiment results show that the new algorithm can not only extract secret information correctly and restore the original carrier image completely but also increase the resistance ability of secret information to some lossy processes.
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