Author

Zhi-Feng Bao

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Preprint Oct 2026

Cost-Effective Numerical QA over Semi-Structured Table: Structuring, Resolution, Planning

Semi-structured tables encode rich semantic information through diverse layout elements, such as hierarchical row and column headers. Answering numerical questions over such data is challenging because it requires a joint effort of accurate structural understanding of tables, question uncertainty resolution, and comple...

Feng Luo, Hui Luo, Zhi-Feng Bao et al. · 0 citations

Jul 2026

GRAFT: Graph-Matched Retrieval and Fusion of Tables in Data Lakes

This work recast subgraph generation as a Markov decision process and learn a value function via implicit Q-learning on self-generated trajectories produced by a canonical compression operator that inverts the homomorphism, and introduces IGMS, a log-determinant reward that couples semantic relevance, structural compat...

Dao-Min Ji, Hui Luo, Zhi-Feng Bao et al. · arXiv.org · 1 citation