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Articles by Hongfang Zhou
Total Records ( 3 ) for Hongfang Zhou
  Hongfang Zhou , Boqin Feng , Lintao Lv and Yue Hui
  Subspace clustering has been studied extensively and widely since traditional algorithms are ineffective in high-dimensional data spaces. Firstly, they were sensitive to noises, which are inevitable in high-dimensional data spaces; secondly, they were too severely dependent on some distance metrics, which cannot act as virtual indicators as in high-dimensional data spaces; thirdly, they often use a global threshold, but different groups of features behave differently in various dimensional subspaces. Accordingly, traditional clustering algorithms are not suitable in high-dimensional spaces. On the analysis of the advantages and disadvantages inherent to the traditional clustering algorithm, we propose a robust algorithm JPA (Joining-Pruning Algorithm). Our algorithm is based on an efficient two-phase architecture. The experiments show that our algorithm achieves a significant gain of runtime and quality in comparison to nowadays subspace clustering algorithms.
  Wei Wei , Xiang Li , Bin Zhou , Hongfang Zhou , Peiyi Shen , Lei Wang and Jing Zhang
  Wireless Radio Frequency (RF) technology, which can take the place of cable, has been widely used in many current fields as one of information technologies with widest horizon of development. The problems caused by the environment restrictions and the unfavorable conditions for cable wiring have been solved because of the emergence of the wireless. Its three important characteristics and advantages are low costing, low power consumption and peer-to-peer communication. During the design procedure, the system is divided into three major modules according to the functional structure, namely central control module, wireless transceiver module and computer dealing software, The central control module uses Sygnal company's low power enhanced 51 MCU C8051F310 as CPU, mainly to complete the data acquisition and processing. The wireless transceiver module is made up of TI CC1101 wireless transceiver chip, which mainly realizes wireless data transmission and The computer dealing software real-timely displays and deals with the data through visual, friendly programming interface, based on C#.NET. Final achievement of the system design is two compact communication devices, one of them connects with PC through RS-232 interface, System is operated through the graphical user interface based on windows, which is very convenient to operate. Debugging result indicated that data acquisition, processing and transmission could be achieved in wireless or wired way under the control of PC and it visually displays the results to the user, satisfies request of the wireless power monitoring data communication system, reaches the technical index.
  Hongfang Zhou , Boqin Feng , Lintao Lv and Hui Yue
  Traditional clustering algorithms are designed for isolated datasets. But in most cases, relationships among different datasets are always existed. So we must consider the actual circumstances from the cooperative aspects. A new collaborative model is proposed and based on this model a new cooperative clustering algorithm is presented. In theorem, the algorithm is proved to converge to the local minimum. Finally, experimental results demonstrate that the clustering structures obtained by new algorithm are different from those of conventional algorithms for the consideration of collaboration and the performances of these collaborative clustering algorithms can be much better than those traditional separated algorithms under the cooperating circumstances.
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