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Li-Nan Zheng

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Open access Sep 2026

NOAH: A System For Analyzing Non-relational Tables With Natural Language

Non-relational tables, such as spreadsheets and web tables, are widely used to store structured data, yet they are primarily designed for human reading rather than machine-driven analysis. These tables often contain hierarchical headers, merged cells, and implicit spatial semantics, making it difficult for large langua...

Li-Nan Zheng, Chuan Lei, Lei Cao · 0 citations
Jun 2026

Data-Efficient Online Training for Direct Alignment in LLMs

This work proposes DOTA, a data selection framework that minimizes the cost of generating preference data, while still ensuring the quality of training, and proposes a theoretically grounded metric called Preference Perplexity (PFP) that enables it to design a low cost, gradient-based method to effectively estimate the...

Chi Zhang, Jia-Chen T. Wang, Kun He et al. · 0 citations

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