Siwei Qiang

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Micro-blogging services can track users' geo-locations when users check-in their places or use geo-tagging which implicitly reveals locations. This " geo tracking " can help to find topics triggered by some events in certain regions. However, discovering such topics is very challenging because of the large amount of noisy messages (e.g. daily(More)
Mobile devices equipped with geo-location modules facilitate researches on the nature of human mobility. While valuable contributions have been made to discover trajectory patterns from movement history, there are still not a comparative amount of works specialized in analyzing how trajectory patterns change over time. In this paper, we facilitate this(More)
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