5 papers
Continuous Query for Top- Maximal Sum Intervals over Streaming Data
Zhongshuai Zhang, Xiaochun Yang, Baihua Zheng +3
The paper introduces a partition-based method for continuously finding the top‑k maximal sum intervals in a sliding window over streaming data, allowing efficient pruning and incre…
From Single to Multiple Attributes: Experimental Insights on Sampling-Based Distinct Combination Estimation in GROUP-BY Queries
Yujie Zhang, Xiaochun Yang, Bin Wang +1
Estimating the number of distinct combinations in multi-attribute GROUP-BY queries remains a significant yet underexplored challenge. Current cardinality estimation techniques prim…
Low-Latency Out-of-Core ANN Search in High-Dimensional Space
Ziwen Song, Bin Wang, Xiaochun Yang +1
In-memory graph-based approximate nearest neighbor (ANN) search has superior search performance but incurs significant memory footprint. Disk-based methods reduce memory usage but…
Joint Knowledge Base Completion and Question Answering by Combining Large Language Models and Small Language Models
Yinan Liu, Dongying Lin, Sigang Luo +2
Knowledge Bases (KBs) play a key role in various applications. As two representative KB-related tasks, knowledge base completion (KBC) and knowledge base question answering (KBQA)…
OntoTKGE: Ontology-Enhanced Temporal Knowledge Graph Extrapolation
Dongying Lin, Yinan Liu, Shengwei tang +2
Temporal knowledge graph (TKG) extrapolation is an important task that aims to predict future facts through historical interaction information within KG snapshots. A key challenge…