NDLI: Fast mining of complex time-stamped events

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Fast mining of complex time-stamped events

Content Provider	ACM Digital Library
Author	Tong, Hanghang Eliassi-Rad, Tina Sakurai, Yasushi Faloutsos, Christos
Abstract	Given a collection of complex, time-stamped events, how do we find patterns and anomalies? Events could be meetings with one or more persons and one or more agenda items at zero or more locations (e.g., teleconferences), or they could be publications with authors, keywords, publishers, etc. In such settings, we want to find time stamps that look similar to each other and group them; we also want to find anomalies. In addition, we want our approach to provide interpretations of the clusters and anomalies by annotating them. Furthermore, we want our approach to automatically find the right time-granularity in which to do analysis. Lastly, we want fast, scalable algorithms for all these problems. We address the above challenges through two main ideas. The first (T3) is to turn the problem into a graph analysis problem, by carefully treating each time stamp as a node in a graph. This viewpoint brings to bear the vast machinery of graph analysis methods (PageRank, graph partitioning, proximity analysis, and CenterPiece Subgraphs, to name a few). Thus, T3 can automatically group the time stamps into meaningful clusters and spot anomalies. Moreover, it can select representative events/persons/locations for each cluster and each anomaly, as their interpretations. The second idea (MT3) is to use temporal multi-resolution analysis (e.g., minutes, hours, days). We show that MT3 can quickly derive results from finer-to-coarser resolutions, achieving up to 2 orders of magnitude speedups. We verify the effectiveness as well as efficiency of T3 and MT3 on several real datasets.
Starting Page	759
Ending Page	768
Page Count	10
File Format	PDF
ISBN	9781595939913
DOI	10.1145/1458082.1458184
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2008-10-26
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Multi-resolution analysis Scalability Graph mining
Content Type	Text
Resource Type	Article

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