activity
20242026
collaborators

9 papers

cs.LG2026

Start Classifying: Categorical Critics for LLM Reinforcement Learning

Zhijian Zhou, Long Li, Xuan Zhang +7

Proximal Policy Optimization (PPO) for large language models typically trains its critic by mean-squared-error (MSE) regression on scalar value targets. Although scalar MSE is stat…

cs.AI2026

Internalizing the Future: A Unified Agentic Training Paradigm for World Model Planning

Xuan Zhang, Zhijian Zhou, Lingfeng Qiao +6

Large language model (LLM) agents have demonstrated strong capability in sequential decision-making, yet they remains fundamentally reactive in long-horizon tasks. Unlike humans wh…

cs.LG2026

DyJR: Preserving Diversity in Reinforcement Learning with Verifiable Rewards via Dynamic Jensen-Shannon Replay

Long Li, Zhijian Zhou, Tianyi Wang +7

While Reinforcement Learning (RL) enhances Large Language Model reasoning, on-policy algorithms like GRPO are sample-inefficient as they discard past rollouts. Existing experience…

cs.CY2026

InterveneBench: Benchmarking LLMs for Intervention Reasoning and Causal Study Design in Real Social Systems

Shaojie Shi, Zhengyu Shi, Lingran Zheng +15

Causal inference in social science relies on end-to-end, intervention-centered research-design reasoning grounded in real-world policy interventions, but current benchmarks fail to…

cs.CL2025

CTkvr: KV Cache Retrieval for Long-Context LLMs via Centroid then Token Indexing

Kuan Lu, Shuhang Lin, Sai Wu +7

Large language models (LLMs) are increasingly applied in long-context scenarios such as multi-turn conversations. However, long contexts pose significant challenges for inference e…

cs.AI2025

Count Counts: Motivating Exploration in LLM Reasoning with Count-based Intrinsic Rewards

Xuan Zhang, Ruixiao Li, Zhijian Zhou +7

Reinforcement Learning (RL) has become a compelling way to strengthen the multi step reasoning ability of Large Language Models (LLMs). However, prevalent RL paradigms still lean o…