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Abstract: A fundamental problem underlying location-based tasks is to construct a complete profile of users’ spatiotemporal patterns. In many real-world settings, the sparsity of location data makes it difficult to construct such a profile. As a remedy, we describe a Bayesian probabilistic graphical model, called Collaborative Place Model (CPM), which infers similarities across users to construct complete and time-dependent profiles of users’ whereabouts from unsupervised location data. We apply CPM to both sparse and dense datasets, and demonstrate how it both improves location prediction performance and provides new insights into users’ spatiotemporal patterns.
Publication Date: 2015
Citation: Kapicioglu, Berk, David S. Rosenberg, Robert E. Schapire, and Tony Jebara. "Collaborative place models." In Twenty-Fourth International Joint Conference on Artificial Intelligence (2015): pp. 3612–3618.
ISSN: 1045-0823
Pages: 3612 - 3618
Type of Material: Conference Article
Journal/Proceeding Title: International Joint Conference on Artificial Intelligence
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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