Hengcai Zhang

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In this paper, we presented a technical framework to calculate the turn delays on road network with floating car data (FCD). Firstly the original FCD collected with GPS equipped taxies was cleaned and matched to a street map with a distributed system based on Hadoop and MongoDB. Secondly the refined dataset was distributed and matched to the specific(More)
Current moving-object database (MOD) systems focus on management of movement data, but pay less attention to modelling social relationships between moving objects and spatial-temporal trajectories in an integrated manner. This paper combines moving-object database and social network systems and presents a novel data model called Geo-Social-Moving (GSM) that(More)
Modeling the time cost on driving through the intersections among road networkscan significantly help improve the reliability of car navigation systems or web map systems, as well as other real traffic related applications (Liu et al., 2013). Some researchers rely on parametric approaches including the historical mean (Sun 2007; Zhao et al. 2013), linear(More)
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