%0 Journal Article
%T A High-Speed Heuristic Algorithm for Mining Frequent Patterns in Data Stream<br>数据流中一种快速启发式频繁模式挖掘方法
%A ZHANG Xin
%A LI Xiao-Guang
%A WANG Da-Ling
%A YU Ge
%A <br>张昕
%A 李晓光
%A 王大玲
%A 于戈
%J 软件学报
%D 2005
%I 
%X Of the current approaches to frequent pattern discovery in stream data, the batch approach requires enough data, while the heuristic approach can deal with stream data directly. Although the average speed of the batch approach is higher, it cannot response on time and the query granularity is rough. This paper proposes an improved Lexicographic tree, IL-TREE (improved lexicographic tree), and gives a novel heuristic algorithm, called FPIL-Stream (frequent pattern mining based on improved lexicographic tree), which locates the historical patterns rapidly in the stage of updating the patterns and generating the new ones. Moreover, a policy for the titled window is integrated into the algorithm for recording the historical information in details. With the promise of the processing stream data on time, the algorithm reduce the average processing time greatly and provides a finer granularity of query.
%K data mining
%K data stream
%K frequent pattern
%K tilted window<br>数据挖掘
%K 数据流
%K 频繁模式
%K 倾斜窗口
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=7735F413D429542E610B3D6AC0D5EC59&aid=8C5057E5E6640305&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=59906B3B2830C2C5&sid=9329D00191B11ACC&eid=0FC8B9772E3A7521&journal_id=1000-9825&journal_name=软件学报&referenced_num=9&reference_num=7