Author

Qizhuo Xie

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Preprint Oct 2026

Uncovering Semantic Hierarchies in Text-Attributed Graphs via Variational EM-based LLM-GNN Synergy

While hierarchical structures are intrinsic to organizing human knowledge, current representation learning on text-attributed graphs predominantly operates on flat semantic spaces, overlooking the rich coarse-to-fine granularity inherent in real-world data. To bridge this gap, we propose SHiFT, which synergizes the rea...

Yunhui Liu, Xu-Dong Jin, Qizhuo Xie et al. · 0 citations

Conference Open access 2026

CoDA: Restoring Contextual Dominance via Copy-Encouraged Attention Intervention for Mitigating RAG Hallucinations

CoDA is introduced, a lightweight inference-time attention intervention that amplifies evidence-aligned value states, enabling more attention heads to transport reliable external evidence in a copy-encouraged manner and improves contextual faithfulness, reduces hallucination, and remains robust under long and noisy con...

Jinwei Shi, Qizhuo Xie, Qianzi Hou et al. · Annual Meeting of the Associ... · 0 citations