4 papers
Importance-aware Topic Modeling for Discovering Public Transit Risk from Noisy Social Media
Fatima Ashraf, Muhammad Ayub Sabir, Jiaxin Deng +2
Urban transit agencies increasingly turn to social media to monitor emerging service risks such as crowding, delays, and safety incidents, yet the signals of concern are sparse, sh…
Rectify and Align GPS Points to Parking Spots via Rank-1 Constraint
Jiaxing Deng, Junbiao Pang, Zhicheng Wang +1
Parking spots are essential components, providing vital mobile resources for residents in a city. Accurate Global Positioning System (GPS) points of parking spots are the core data…
Unsupervised Abnormal Stop Detection for Long Distance Coaches with Low-Frequency GPS
Jiaxin Deng, Junbiao Pang, Jiayu Xu +1
In our urban life, long distance coaches supply a convenient yet economic approach to the transportation of the public. One notable problem is to discover the abnormal stop of the…
Finding A Taxi with Illegal Driver Substitution Activity via Behavior Modelings
Junbiao Pang, Muhammad Ayub Sabir, Zhuyun Wang +4
In our urban life, Illegal Driver Substitution (IDS) activity for a taxi is a grave unlawful activity in the taxi industry, possibly causing severe traffic accidents and painful so…