Browsing 15 Commerce, Management, Tourism and Services by Author "Zhang Chengqi"

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  • Browsing 15 Commerce, Management, Tourism and Services by Author

Browsing 15 Commerce, Management, Tourism and Services by Author "Zhang Chengqi"

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  • Database classification for multi-database mining 
    Wu Xindong; Zhang Chengqi; Zhang Shichao (Elsevier Science, 2003)
    Many large organizations have multiple databases distributed in different branches, and therefore multi-database mining is an important task for data mining. To reduce the search cost in the data from all databases, we ...
  • Identifying Global Exceptional Patterns in multi-database mining 
    Liu Meiling; Nie Wenlong; Zhang Chengqi; Zhang Shichao (Institute of Electrical and Electronics Engineers, 2004)
    In multi-database mining, there can be many local patterns (frequent itemsets or association rules) in each database. At the end of multi-database mining, it is necessary to analyze these local patterns to gain global ...
  • Multi-database mining 
    Zhang Shichao; Wu Xindong; Zhang Chengqi (Institute of Electrical and Electronics Engineers, 2003)
    Multi-database mining is an important research area because (1) there is an urgent need for analyzing data in different sources, (2) there are essential differences between mono- and multi-database mining, and (3) there ...
  • Post-mining: maintenance of Association rules by weighting 
    Zhang Chengqi; Yan Xiaowei; Zhang Shichao (Elsevier, 2005)
    This paper proposes a new strategy for maintaining association rules in dynamic databases. This method uses weighting technique to highlight new data. Our approach is novel in that recently added transactions are given ...
  • SVM-OD: SVM Method to Detect Outliers 
    Zhang Chengqi; Wu Xindong; Qi Hongwei; Wang Jue; Wang Jiaqi (Springer-Verlag, 2002)
    Outlier detection is an important task in data mining because outliers can be either useful knowledge or noise. Many statistical methods have been applied to detect outliers, but they usually assume a given distribution ...
  • Systematic Engineering in Designing Architecture of Telecommunications Business Intelligence System 
    Cao Longbing; Luo Dan; Luo Chao; Zhang Chengqi (IOS Press, 2003)
    Nowadays, several solutions can be obtained from business intelligence product vendors for building business intelligence system. However, based on our experience in implementing business intelligence system in ...