Author

Hai-Xun Wang

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Preprint Sep 2026

Pre-retrieval Query Clustering for Adaptive Top-k Document Retrieval in RAG Systems

RAG systems commonly retrieve a fixed number of documents (top-k) to ground generation, but this static approach is brittle: simple queries suffer over-retrieval (adding noise and cost) while complex queries are under-retrieved, causing recall failures that cascade into incorrect answers. Motivated by the question of h...

Ye Xia, Emre Yamangil, Hai-Xun Wang · 0 citations

Aug 2026

DataMosaic: An Interactive Demonstration of Constraint-Driven Document-to-Database Construction

Large language models (LLMs) have improved document information extraction, but turning extracted facts into relational databases remains fundamentally difficult. The challenge is that extraction is local to text, whereas database construction must satisfy global semantics defined by schemas, keys, and integrity cons...

Zhengxuan Zhang, Zhuo-Wen Liang, Hai-Xun Wang et al. · Proceedings of the VLDB Endo... · 0 citations