Outlier Detection over Sliding Windows for Probabilistic Data Streams
Outlier Detection over Sliding Windows for Probabilistic Data Streams
复制标题
概率数据流滑动窗口的异常值检测
DOI:
10.1007/s11390-010-9332-2
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发表时间:
2010-05
期刊:
影响因子:
--
通讯作者:
Bin Wang, Xiaochun Yang, Guoren Wang, Ge Yu
中科院分区:
文献类型:
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作者:
Bin Wang, Xiaochun Yang, Guoren Wang, Ge Yu
Outlier detection is a very useful technique in many applications, where data is generally uncertain and could be described using probability. While having been studied intensively in the field of deterministic data, outlier detection is still novel in the emerging uncertain data field. In this paper, we study the semantic of outlier detection on probabilistic data stream and present a new definition of distance-based outlier over sliding window. We then show the problem of detecting an outlier over a set of possible world instances is equivalent to the problem of finding thek-th element in its neighborhood. Based on this observation, a dynamic programming algorithm (DPA) is proposed to reduce the detection cost fromO(2|R(e; d)|) toO(|k·R(e; d)|), whereR(e; d) is thed-neighborhood ofe. Furthermore, we propose a pruning-based approach (PBA) to effectively and efficiently filter non-outliers on single window, and dynamically detect recentmelements incrementally. Finally, detailed analysis and thorough experimental results demonstrate the efficiency and scalability of our approach.
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DOI:
10.1109/icde.2008.4497423
发表时间:
2008-04
期刊:
2008 IEEE 24th International Conference on Data Engineering
影响因子:
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作者:
C. Aggarwal;Philip S. Yu
通讯作者:
C. Aggarwal;Philip S. Yu
DOI:
10.1145/1081870.1081955
发表时间:
2005-08
期刊:
--
影响因子:
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作者:
H. Kriegel;M. Pfeifle
通讯作者:
H. Kriegel;M. Pfeifle
DOI:
--
发表时间:
1998-08
期刊:
--
影响因子:
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作者:
Edwin M. Knorr;R. Ng
通讯作者:
Edwin M. Knorr;R. Ng
DOI:
10.1109/icde.2005.137
发表时间:
2005-04
期刊:
21st International Conference on Data Engineering (ICDE'05)
影响因子:
--
作者:
Xuemin Lin;Yidong Yuan;Wei Wang-;Hongjun Lu
通讯作者:
Xuemin Lin;Yidong Yuan;Wei Wang-;Hongjun Lu
DOI:
10.1007/bfb0100984
发表时间:
1998-03
期刊:
--
影响因子:
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作者:
Sunita Sarawagi;R. Agrawal;N. Megiddo
通讯作者:
Sunita Sarawagi;R. Agrawal;N. Megiddo