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Wenzhe Niu

3 accepted papers

2026

From Absolute to Relative: Rethinking Reward Shaping in Group-Based Reinforcement Learning

ICML 2026poster

Reinforcement learning has become a cornerstone for enhancing the reasoning capabilities of Large Language Models, where group-based approaches such as GRPO have emerged as efficient paradigms that optimize policies by leveraging intra-group performance differences. However, these methods typically …

Cited by 0SourceScholar
2025

Dynamic Collaboration of Multi-Language Models based on Minimal Complete Semantic Units

EMNLP 2025

This paper investigates the enhancement of reasoning capabilities in language models through token-level multi-model collaboration. Our approach selects the optimal tokens from the next token distributions provided by multiple models to perform autoregressive reasoning. Contrary to the assumption th

2025

LangTime: A Language-Guided Unified Model for Time Series Forecasting with Proximal Policy Optimization

ICML 2025poster

Recent research has shown an increasing interest in utilizing pre-trained large language models (LLMs) for a variety of time series applications. However, there are three main challenges when using LLMs as foundational models for time series forecasting: (1) Cross-domain generalization. (2) Cross-mo…

Cited by 0SourcePDFScholar