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WebKey: a graph-based method for event detection in web news

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With rapid and vast publishing of news over the Internet, there is a surge of interest to detect underlying hot events from online news streams. There are two main challenges in event detection: accuracy and scalability. In this paper, we propose a fast and efficient method to detect events in news websites. First, we identify bursty terms which suddenly appear in a lot of news documents. Then, we construct a novel co-occurrence graph between terms in which nodes and edges are weighted based on important features such as click and document frequency within burst intervals. Finally, a weighted community detection algorithm is used to cluster terms and find events. We also propose a couple of techniques to reduce the size of the graph. The results of our evaluations show that the proposed method yields a much higher precision and recall than past methods, such that their harmonic mean is improved by at least 40%. Moreover, it reduces the running time and memory usage by a factor of at least 2.

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Correspondence to Sajjad Zarifzadeh.

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Rasouli, E., Zarifzadeh, S. & Rafsanjani, A.J. WebKey: a graph-based method for event detection in web news. J Intell Inf Syst 54, 585–604 (2020).

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