Challenges faced in organizing impromptu activities are the requirements of making timely
invitations in accordance with the locations of candidate attendees and the social …

Reinforcement learning (RL) is an effective approach to solve autonomous obstacle
avoidance and target tracking for Unmanned Aerial Vehicle (UAV). However, due to …

The moving k nearest neighbor query, which computes one's k nearest neighbor set and
maintains it while at move, is gaining importance due to the prevalent use of smart mobile …

Skyline query processing for location-based services, which considers both spatial and
nonspatial attributes of the objects being queried, has recently received increasing attention …

k-closest pair (KCP for short) search is a fundamental problem in database research. Given
a set of d-dimensional streaming data S, KCP search aims to retrieve k pairs with the …

The development and integration of social networking services and smartphones have
made it easy for individuals to organize impromptu social activities anywhere and anytime …

Web users and content are increasingly being geo-positioned. This development gives
prominence to spatial keyword queries, which involve both the locations and textual …

With the ever-increasing use of smartphones and tablet devices, location-based services
(LBSs) have experienced explosive growth in the past few years. To scale up services, there …

In this paper, we identify and solve a new type of spatial queries, called continuous visible
nearest neighbor (CVNN) search. Given a data set P, an obstacle set O, and a query line …

Spatial proximity is one of the most important factors for the quick deployment of the task
groups in various time-sensitive missions. This article proposes a new spatial query, Spatio …