COVID-19 has disrupted normal life and has enforced a substantial change in the policies,
priorities and activities of individuals, organisations and governments. These changes are …

Nowadays, with advanced information technologies deployed citywide, large data volumes
and powerful computational resources are intelligentizing modern city development. As an …

Indoor venues accommodate many people who collectively form crowds. Such crowds in
turn influence people's routing choices, eg, people may prefer to avoid crowded rooms when …

The fight against the COVID-19 pandemic has highlighted the importance and benefits of
recommending paths that reduce the exposure to and the spread of the SARS-CoV-2 …

Many commercial cloud service providers (CSPs) adopt pay-per-query pricing models, in
which data owners are charged based on the amount of data scanned by each query. In …

With the rapid development of blockchain, user's daily financial bills and transfer records can
be safely and completely stored in a transaction form. These transactions express …

Route search and planning have been playing an important role in spatial data
management and location-based social services. In this light, we conduct a survey on …

In this paper, we study the efficient Time-interval Augmented Spatial K eyword (TASK) query
problem, which considers the location, time-interval, and attribute value of keywords of …

Indoor shortest path query (ISPQ) is of fundamental importance for indoor location-based
services (LBS). However, existing ISPQs ignore indoor temporal variations, eg, the open and …

The recent years have witnessed the growing popularity of indoor location-based services
(LBS) in practice and research. Among others, indoor shortest path query (ISPQ) is of …