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DhCM: Dynamic and Hierarchical Event Categorization and Discovery for Social Media Stream
Guo, Jinjin; Gong, Zhiguo; Cao, Longbing
2021-10-01
Source PublicationACM Transactions on Intelligent Systems and Technology
ISSN2157-6904
Volume12Issue:5
AbstractThe online event discovery in social media based documents is useful, such as for disaster recognition and intervention. However, the diverse events incrementally identified from social media streams remain accumulated, ad hoc, and unstructured. They cannot assist users in digesting the tremendous amount of information and finding their interested events. Further, most of the existing work is challenged by jointly identifying incremental events and dynamically organizing them in an adaptive hierarchy. To address these problems, this article proposes dynamic and hierarchical Categorization Modeling (dhCM) for social media stream. Instead of manually dividing the timeframe, a multimodal event miner exploits a density estimation technique to continuously capture the temporal influence between documents and incrementally identify online events in textual, temporal, and spatial spaces. At the same time, an adaptive categorization hierarchy is formed to automatically organize the documents into proper categories at multiple levels of granularities. In a nonparametric manner, dhCM accommodates the increasing complexity of data streams with automatically growing the categorization hierarchy over adaptive growth. A sequential Monte Carlo algorithm is used for the online inference of the dhCM parameters. Extensive experiments show that dhCM outperforms the state-of-the-art models in terms of term coherence, category abstraction and specialization, hierarchical affinity, and event categorization and discovery accuracy.
KeywordBayesian nonparametrics document stream event categorization event discovery Hierarchical categorization kernel estimation online inference
DOI10.1145/3470888
URLView the original
Language英語English
Scopus ID2-s2.0-85122083622
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Document TypeJournal article
CollectionUniversity of Macau
AffiliationUniversity of Macau, Taipa, Macao
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Guo, Jinjin,Gong, Zhiguo,Cao, Longbing. DhCM: Dynamic and Hierarchical Event Categorization and Discovery for Social Media Stream[J]. ACM Transactions on Intelligent Systems and Technology,2021,12(5).
APA Guo, Jinjin,Gong, Zhiguo,&Cao, Longbing.(2021).DhCM: Dynamic and Hierarchical Event Categorization and Discovery for Social Media Stream.ACM Transactions on Intelligent Systems and Technology,12(5).
MLA Guo, Jinjin,et al."DhCM: Dynamic and Hierarchical Event Categorization and Discovery for Social Media Stream".ACM Transactions on Intelligent Systems and Technology 12.5(2021).
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