Effective querying of data in the road networks is an important problem in the Internet of
vehicles. Aggregate nearest neighbor queries can return the objects that minimizes an …

Given a setS of multidimensional objects and a query object q, ak nearest neighbor (kNN)
query finds from S the k closest objects to q. This query is a fundamental problem in …

Spatial information retrieval is a common task of digital ecosystems due to the popularity of
collecting and storing spatial information and phenomena in the world of the Internet of …

In part due to the proliferation of GPS-equipped mobile devices, massive svolumes of geo-
tagged streaming text messages are becoming available on social media. It is of great …

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 …

We propose and study a new type of location optimization problem, the min-dist location
selection problem: given a set of clients and a set of existing facilities, we select a location …

A visible k nearest neighbor (Vk NN) query retrieves k objects that are visible and nearest to
the query object, where “visible” means that there is no obstacle between an object and the …

In this paper, we study a new form of reverse nearest neighbor (RNN) queries, ie, obstructed
reverse nearest neighbor (ORNN) search. It considers the impact of obstacles on the …

In this paper, we study a new form of reverse nearest neighbor (RNN) queries, ie, obstructed
reverse nearest neighbor (ORNN) search. It considers the impact of obstacles on the …

The volume of time series stream data grows rapidly in various applications. To reduce the
storage, transmission and processing costs of time series data, segmentation and …