Travel planning and recommendation are important aspects of transportation. We propose
and investigate a novel Collective Travel Planning (CTP) query that finds the lowest-cost …

Location-based social networks grow at a remarkable pace. Current location-aware mobile
devices enable us to access these networks from anywhere and to connect to friends via …

The objective of public resource allocation, eg, the deployment of billboards, surveillance
cameras, base stations, trash bins, is to serve more people. However, due to the dynamics of …

With the proliferation of geo-textual objects on the web, extensive efforts have been devoted
to improving the efficiency of top-k spatial keyword queries in different settings. However …

Nearest neighbour queries (or kNN) have been used in many disciplines, including spatial
databases. kNN queries have gone beyond simply finding nearest objects. It is, therefore …

Mining the most influential k-location set finds k locations, traversed by the maximum
number of unique trajectories, in a given spatial region. These influential locations are …

Emergency medical service provides a variety of services for those in need of emergency
care. One of the major challenges encountered by emergency service providers is selecting …

An authoritative treatment of urban computing, offering an overview of the field, fundamental
techniques, advanced models, and novel applications. Urban computing brings powerful …

This paper addresses a group-based collective k eyword (GBCK) query problem in road
networks. We model the road network as an undirected graph, where each node locating in …

In this paper, we investigate the problem of a size-constrained k-core group query (SCCGQ)
in social networks, taking both user closeness and network topology into consideration …