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On-line Access: 2024-08-27

Received: 2023-10-17

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Journal of Zhejiang University SCIENCE C 2010 Vol.11 No.5 P.340-355

http://doi.org/10.1631/jzus.C0910245


Online detection of bursty events and their evolution in news streams


Author(s):  Wei Chen, Chun Chen, Li-jun Zhang, Can Wang, Jia-jun Bu

Affiliation(s):  Zhejiang Laboratory of Service Robot, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   chenw@zju.edu.cn, wcan@zju.edu.cn

Key Words:  Online event detection, Event’, s evolution, News stream, Affinity propagation


Wei Chen, Chun Chen, Li-jun Zhang, Can Wang, Jia-jun Bu. Online detection of bursty events and their evolution in news streams[J]. Journal of Zhejiang University Science C, 2010, 11(5): 340-355.

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author="Wei Chen, Chun Chen, Li-jun Zhang, Can Wang, Jia-jun Bu",
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%A Chun Chen
%A Li-jun Zhang
%A Can Wang
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%P 340-355
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C0910245

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T1 - Online detection of bursty events and their evolution in news streams
A1 - Wei Chen
A1 - Chun Chen
A1 - Li-jun Zhang
A1 - Can Wang
A1 - Jia-jun Bu
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EP - 355
%@ 1869-1951
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C0910245


Abstract: 
Online monitoring of temporally-sequenced news streams for interesting patterns and trends has gained popularity in the last decade. In this paper, we study a particular news stream monitoring task: timely detection of bursty events which have happened recently and discovery of their evolutionary patterns along the timeline. Here, a news stream is represented as feature streams of tens of thousands of features (i.e., keyword. Each news story consists of a set of keywords.). A bursty event therefore is composed of a group of bursty features, which show bursty rises in frequency as the related event emerges. In this paper, we give a formal definition to the above problem and present a solution with the following steps: (1) applying an online multi-resolution burst detection method to identify bursty features with different bursty durations within a recent time period; (2) clustering bursty features to form bursty events and associating each event with a power value which reflects its bursty level; (3) applying an information retrieval method based on cosine similarity to discover the event’;s evolution (i.e., highly related bursty events in history) along the timeline. We extensively evaluate the proposed methods on the Reuters Corpus Volume 1. Experimental results show that our methods can detect bursty events in a timely way and effectively discover their evolution. The power values used in our model not only measure event’;s bursty level or relative importance well at a certain time point but also show relative strengths of events along the same evolution.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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