Demo Data from VLDB 2026 / reviewers in the wild / expert
Qiji Mo
dblp:420/0792
· DBLP profile ↗
2ranked-venue papers
1as first author
2since 2021 · last 2026
0009-0003-6931-6396ORCID · reported
Domains — the database's venue-derived domains; a paper can count in several
Databases, data management, data science and information retrieval · 2 · 1 first-author · 2 since 2021
Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.
| Databases, data mining, and information retrieval
1 paper |
Information retrieval · 83% Data mining · 17% |
Topics — the 5 heaviest of 5, each with the papers that count most for it
| Topic | Weight | Papers | Last | Evidence papers |
|---|---|---|---|---|
Information retrieval › similarity search › nearest neighbor search
approximate nearest neighbor search |
0.9 | 1 | 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor Search · Proc. ACM Manag. Data 2025 |
Information retrieval › similarity search › nearest neighbor search › approximate nearest neighbor search
graph-based ANNS |
0.9 | 1 | 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor Search · Proc. ACM Manag. Data 2025 |
Information retrieval › similarity search
nearest neighbor search |
0.9 | 1 | 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor Search · Proc. ACM Manag. Data 2025 |
Data mining
anomaly detection |
0.3 | 1 | 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor Search · Proc. ACM Manag. Data 2025 |
Data mining › anomaly detection
novelty detection |
0.3 | 1 | 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor Search · Proc. ACM Manag. Data 2025 |
Methods — techniques the papers use, named apart from their topics
reachability fixing · 0.9neighboring graph defect fixing · 0.9graph index construction · 0.9
| Year | Publication | Venue | Position |
|---|---|---|---|
| 2026 | Overcoming the Sync-Compute Dilemma in Parallel Graph-Based Vector Retrieval
Qiji Mo, Zhiyuan Hua, Zebin Yao, Lixiao Cui, Gang Wang 0001, Xiaoguang Liu 0001, Zijing Wei, Xinyu Liu 0011, Tianxiao Tang, Shaozhi Liu, Lin Qu |
ICDE | 1 |
| 2025 | Dynamically Detect and Fix Hardness for Efficient Approximate Nearest Neighbor SearchabstractApproximate Nearest Neighbor Search (ANNS) has become a fundamental component in many real-world applications. Among various ANNS algorithms, graph-based methods are state-of-the-art. However, ANNS often suffers from a significant drop in accuracy for certain queries, especially in Out-of-Distribution (OOD) scenarios. To address this issue, a recent approach named RoarGraph constructs a bipartite graph between the base data and historical queries to bridge the gap between two different distributions. However, it suffers from some limitations: (1) Building a bipartite graph between two distributions lacks theoretical support, resulting in the query distribution not being effectively utilized by the graph index. (2) Requires a sufficient number of historical queries before graph construction and suffers from high construction times. (3) When the query workload changes, it requires reconstruction to maintain high search accuracy. In this paper, we first propose Escape Hardness, a metric to evaluate the quality of the graph structure around the query. Then we divide the graph search into two stages and dynamically identify and fix defective graph regions in each stage based on Escape Hardness. (1) From the entry point to the vicinity of the query. We propose R eachability Fix ing (RFix), which enhances the navigability of some key nodes. (2) Searching within the vicinity of the query. We propose N eighboring G raph Defects Fix ing (NGFix) to improve graph connectivity in regions where queries are densely distributed. The results of extensive experiments show that our method outperforms other state-of-the-art methods on real-world datasets, achieving up to 2.25× faster search speed for OOD queries at 99% recall compared with RoarGraph and 6.88× faster speed compared with HNSW. It also accelerates index construction by 2.35-9.02× compared to RoarGraph. Zhiyuan Hua, Qiji Mo, Zebin Yao, Lixiao Cui, Xiaoguang Liu 0001, Gang Wang 0001, Zijing Wei, Xinyu Liu 0011, Tianxiao Tang, Shaozhi Liu, Lin Qu |
Proc. ACM Manag. Data | 2 |