activity
20242026
collaborators

13 papers

cs.SI2026

STEC-Net: A Spatiotemporal Graph Neural Framework for Community Discovery in Dynamic Social Networks

Yingnan Xu, Shuangshuang Chu

Community discovery is a central problem in the analysis of dynamic social networks. Traditional community discovery methods mainly focus on the formation and dissolution of links…

cs.LG2026

Blending Supervised and Reinforcement Fine-Tuning with Prefix Sampling

Zeyu Huang, Tianhao Cheng, Zihan Qiu +4

Existing LLMs-post-training techniques are broadly categorized into supervised fine-tuning (SFT) and reinforcement fine-tuning (RFT). Each paradigm presents a distinct trade-off: (…

cs.CV2026

OraPO: Oracle-educated Reinforcement Learning for Data-efficient and Factual Radiology Report Generation

Zhuoxiao Chen, Hongyang Yu, Ying Xu +3

Radiology report generation (RRG) aims to automatically produce clinically faithful reports from chest X-ray images. Prevailing work typically follows a scale-driven paradigm, by m…

cs.LG2026

Latent Adversarial Regularization for Offline Preference Optimization

Enyi Jiang, Yibo Jacky Zhang, Yinglun Xu +3

Learning from human feedback typically relies on preference optimization that constrains policy updates through token-level regularization. However, preference optimization for lan…

cs.CV2026

Dynamic Topology Awareness: Breaking the Granularity Rigidity in Vision-Language Navigation

Jiankun Peng, Jianyuan Guo, Ying Xu +5

Vision-Language Navigation in Continuous Environments (VLN-CE) presents a core challenge: grounding high-level linguistic instructions into precise, safe, and long-horizon spatial…

cs.CE2026

TransMode-LLM: Feature-Informed Natural Language Modeling with Domain-Enhanced Prompting for Travel Behavior Modeling

Meijing Zhang, Ying Xu

Understanding traveler behavior and accurately predicting travel mode choice are at the heart of transportation planning and policy-making. This study proposes TransMode-LLM, an in…