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Issue:
Online mining closed frequent itemsets in the time window over data streams
Author(s):
JIANG Miao
,
NI Zhiwei
,
MENG Jinhua
,
Zhou Zhiqiang
Pages:
739
-
745
Year:
2011
Issue:
8
Journal:
Journal of University of Science and Technology of China
Keyword:
数据流
;
时间窗体
;
闭频繁集
;
衰减模式
;
Abstract:
在数据流闭频繁项集挖掘过程中,常忽略历史模式对挖掘结果的影响,并采用一种结构来标记闭频繁项集的类型,导致算法的效率不高.为此提出一种挖掘数据流时间窗口中闭频繁项集的方法NEWT-moment.该方法能在单遍扫描数据流事务的条件下完整地记录模式信息.同时,NEWT-moment提出的剪枝方法能很好地降低滑动窗口树F-tree的空间复杂度与闭频繁模式树NEWT-tree的维护代价.此外,该方法提出的时...
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