PERCOM
2011
ACM
13 years 4 months ago
2011
ACM
—In this paper, we consider the problem of tracking fine-grained speeds variations of vehicles using signal strength traces from GSM enabled phones. Existing speed estimation te...
ICDE
2010
IEEE
15 years 6 days ago
2010
IEEE
Research on spatial network databases has so far considered that there is a single cost value associated with each road segment of the network. In most real-world situations, howev...