Authors

Zhi Chen

Publications 2

Preprint Open access

Timer-M1: A Multivariate Time Series Foundation Model via Learning Primitives

Haoran Zhang, Haixuan Liu, Xingjian Su et al. · 2026

We introduce Timer-M1, a pretrained multivariate time series foundation model that learns with primitives for zero-shot forecasting. Across domains, time series share elementary temporal and relational patterns, termed primitives, yet differ in how these primitives manifest and evolve across different contexts. Despite …

Preprint Open access

CARM: Cancellation-Aware Response Masking for LLM Reinforcement Learning

Yafei Zhang, Songshuo Lu, Sicong Liao et al. · 2026

Recent years have witnessed the rapid adoption of reinforcement learning (RL) in large language model (LLM) post-training, with substantial gains in mathematical reasoning and code generation. In practical systems, however, policy updates and differences between rollout and training engines can make sampled responses o …

Co-authors