Mobile communication services raise user privacy concerns in sharing the traveling
trajectories while facilitating people's daily lives. According to these shared trajectories …

With the continued deployment of the Internet of Things (IoT), increasing volumes of devices
are being deployed that emit massive spatially referenced data. Due in part to the dynamic …

In this paper, we study a new variant of trajectory similarity search from the context of
continuous query processing. Given a moving object from to, following a reference route, we …

Abstract The growth of Location-Based Services (LBSs) has been made possible by the
widespread use of GPS-enabled devices. Some important LBSs require the ability to quickly …

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 …

As a major type of continuous spatial queries, the moving spatial keyword queries have
been studied extensively. Most existing studies focus on retrieving single objects, each of …

Huge amounts of spatio-textual objects, such as geo-tagged tweets, are being generated at
an unprecedented scale, leading to a variety of applications such as location-based …

Within the rapidly expanding Internet of Things (IoT), growing amounts of spatially
referenced data are being generated. Due to the dynamic, decentralized, and …

The COVID-19 pandemic has caused over 6 million deaths since 2020. To contain the
spread of the virus, social distancing is one of the most simple yet effective approaches …

Geo-social group queries, which return a social cohesive user group with a spatial
constraint, have receive significant research interests due to their promising applications for …