87 citations · 208 across the 29 of their papers we have counts for
7 papers · 1 filter
SkyCell: A Space-Pruning Based Parallel Skyline Algorithm
Chuanwen Li, Yu Gu, Jianzhong Qi +1
Skyline computation is an essential database operation that has many applications in multi-criteria decision making scenarios such as recommender systems. Existing algorithms have…
Sub-trajectory Similarity Join with Obfuscation
Yanchuan Chang, Jianzhong Qi, Egemen Tanin +2
User trajectory data is becoming increasingly accessible due to the prevalence of GPS-equipped devices such as smartphones. Many existing studies focus on querying trajectories tha…
A Lazy Approach for Efficient Index Learning
Guanli Liu, Lars Kulik, Xingjun Ma +1
Learned indices using neural networks have been shown to outperform traditional indices such as B-trees in both query time and memory. However, learning the distribution of a large…
GeoPrune: Efficiently Finding Shareable Vehicles Based on Geometric Properties
Yixin Xu, Jianzhong Qi, Renata Borovica-Gajic +1
On-demand ride-sharing is rapidly growing.Matching trip requests to vehicles efficiently is critical for the service quality of ride-sharing. To match trip requests with vehicles,…
K-Regret Queries Using Multiplicative Utility Functions
Jianzhong Qi, Fei Zuo, Hanan Samet +1
The k-regret query aims to return a size-k subset S of a database D such that, for any query user that selects a data object from this size-k subset S rather than from database D,…
Reverse Nearest Neighbor Heat Maps: A Tool for Influence Exploration
Yu Sun, Rui Zhang, Andy Yuan Xue +2
We study the problem of constructing a reverse nearest neighbor (RNN) heat map by finding the RNN set of every point in a two-dimensional space. Based on the RNN set of a point, we…
INSQ: An Influential Neighbor Set Based Moving kNN Query Processing System
Chuanwen Li, Yu Gu, Jianzhong Qi +3
We revisit the moving k nearest neighbor (MkNN) query, which computes one's k nearest neighbor set and maintains it while at move. Existing MkNN algorithms are mostly safe region b…