collaborators

8 papers

cs.LG2026

Advantage Collapse in Group Relative Policy Optimization: Diagnosis and Mitigation

Xixiang He, Qiyao Sun, Ao Cheng +5

Group Relative Policy Optimization (GRPO), a prominent algorithm within the Reinforcement Learning from Verifiable Rewards (RLVR) framework, has achieved strong results in improvin…

cs.CV2026

StemBind: When MLLMs Get Lost Between Rules and Instances in Abstract Visual Reasoning

Xixiang He, Baiqi Wu, Xingming Li +4

Multimodal large language models (MLLMs) often know the rule but pick the wrong answer: on abstract visual reasoning (AVR) tasks, a model can describe what it sees and name the und…

cs.CL2026

When AI Meets Early Childhood Education: Large Language Models as Assessment Teammates in Chinese Preschools

Xingming Li, Runke Huang, Yanan Bao +3

High-quality teacher-child interaction (TCI) is fundamental to early childhood development, yet traditional expert-based assessment faces a critical scalability challenge. In large…

cs.CL2026

Efficient Hallucination Detection: Adaptive Bayesian Estimation of Semantic Entropy with Guided Semantic Exploration

Qiyao Sun, Xingming Li, Xixiang He +5

Large language models (LLMs) have achieved remarkable success in various natural language processing tasks, yet they remain prone to generating factually incorrect outputs known as…

cs.CV2026

ENC-Bench: A Benchmark for Evaluating Multimodal Large Language Models in Electronic Navigational Chart Understanding

Ao Cheng, Xingming Li, Xuanyu Ji +5

Electronic Navigational Charts (ENCs) are the safety-critical backbone of modern maritime navigation, yet it remains unclear whether multimodal large language models (MLLMs) can re…

cs.AI2025

PhysDrive: A Multimodal Remote Physiological Measurement Dataset for In-vehicle Driver Monitoring

Jiyao Wang, Xiao Yang, Qingyong Hu +6

Robust and unobtrusive in-vehicle physiological monitoring is crucial for ensuring driving safety and user experience. While remote physiological measurement (RPM) offers a promisi…