Author

Chunyi Peng

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Preprint Oct 2026

Chaos in the Text: Revealing the Modality Preference in Mixed-Modality Retrievers

Dense retrievers have made significant progress on text and image corpora, but whether these capabilities extend reliably to mixed corpora containing text, image, and fused text-image documents remains unclear. In this paper, we systematically examine retrievers across architectures and find that their performance is h...

Yu-Bo Sun, Chun-Yi Peng, Yu-Kun Yan et al. · 0 citations

Preprint Aug 2026

ConceptFormer: Learning Adaptive Latent Concepts for Query-Document Alignment in Visual Document Retrieval

ConceptFormer models query-relevant evidence as continuous, query-conditioned latent concepts that explicitly bridge localized visual evidence and semantic relevance, without requiring either textual intermediate representations or direct reliance on raw visual annotations.

Chunyi Peng, Zhi-Peng Xu, Yu-Kun Yan et al. · 0 citations

Jul 2026

HiEviDR-Bench: A Benchmark for Hierarchical Evidence Aggregation in Deep Research

HiEviDR-Bench is introduced, a benchmark for evaluating Hierarchical Evidence Aggregation in Deep Research and a traceability-oriented evaluation framework with five dimensions: report quality, evidence traceability, citation accuracy, claim verification, and answer correctness, together with a progressive gating mecha...

Yu-Bo Sun, Chunyi Peng, Yu-Kun Yan et al. · arXiv.org · 0 citations