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Hong-Chao Qin

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#machine learning Preprint Oct 2026

OpenDGO: Benchmarking Multi-Agent Organizations Across Diverse Application Domains

Large language model (LLM)-based multi-agent systems are increasingly applied across diverse domains, yet different applications require different forms of agent organization. Existing studies typically adopt predefined organizations, such as Star, Chain, and Tree, or learn communication graphs to improve performance o...

Xun-Kai Li, Miao Zhang, Ze-Kai Chen et al. · 0 citations
Preprint Aug 2026

SAHC-NS: Structure-Aware and Hardness-Calibrated Negative Sampling for Implicit Collaborative Filtering

Negative sampling is a key component of implicit collaborative filtering (CF), as it enables recommenders to effectively learn user preferences. Existing negative sampling methods mostly follow a two-stage paradigm: they first construct a candidate negative pool for each user and then select negative samples from the p...

Jia-Yi Wu, Zheng-Yu Wu, Xun-Kai Li et al. · 0 citations
#machine learning Preprint Oct 2026

Toward Omni Multimodal Graph Foundation Model: A Topology-Driven Binding Approach

Multimodal graph foundation models (MGFMs) seek to learn generalizable representations from large-scale graphs with heterogeneous node modalities. However, real-world Multimodal-Attributed Graphs (MAGs) often contain incomplete node attributes, limiting the scale and diversity of available pretraining corpora. Besides,...

Xun-Kai Li, Chen-Xi Wan, Yin-Lin Zhu et al. · 0 citations
#artificial intelligence Preprint Aug 2026

PAGE-RAG: Provenance-Aware Graph Evidence Promotion for Fixed-Budget Multi-hop Retrieval-Augmented Generation

PAGE-RAG is proposed, a Provenance-Aware Graph Evidence promotion method that scores candidate paths with relevance, source-tracing meta?data, specificity, hubness, noise, and coherence signals, and applies minimal sufficient selection to promote supporting facts into a compact reader context.

Hao Deng, Xun-Kai Li, Hong-Chao Qin et al. · 0 citations
Jul 2026

OpenRTAG: A Comprehensive Benchmark for Robust Text-Attributed Graph Learning under Data Quality Degradation

OpenRTAG provides a standardized testbed for understanding robustness in TAG learning under realistic low-quality settings and systematically evaluates scenario validity and model sensitivity, compares traditional GNNs, LLM-GNNs, and a representative GFM, and investigates the effectiveness, efficiency, and robustness o...

Yu-Ze Dai, Zhi-Han Zhang, Yan Zhao et al. · 0 citations
Preprint Jul 2026

Toward Federated Multimodal Graph Foundation Models: A Topology-Aware Multimodal Alignment Framework

FedGAMMA is proposed, casting federated multimodal graph foundation learning as a two-stage semantic-structural alignment problem of federated pre-training and prompt-based fine-tuning, and outperforms competitive baselines accross multi-domain datasets on multiple tasks.

Xunkai Li, Guohao Fu, Yuming Ai et al. · 0 citations

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