tracked author

Jianwei Zhang

Recurring Qwen author across Qwen2.5, Qwen3 and Bebop. OpenReview records an Alibaba Group researcher profile with confirmed alibaba-inc.com email and Google Scholar link. No high-confidence personal X account was found.

2 archived notes X: not-found

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Jun 23, 2026

Qwen2.5 Technical Report

Qwen2.5 展示了一条面向通用、代码、数学、结构化数据和长上下文场景的 LLM (Large Language Model，大语言模型) 工程路线：用 18T token 预训练、统一 tokenizer、百万级 SFT (Supervised Fine Tuning，监督微调)、DPO (Direct Preference Optimization，直接偏好优化)、GRPO (Group Relative Policy Opti...

2412.15115-qwen2-5-technical-report Reasoning RL Long Context Coding Agent

Jun 10, 2026

Breaking Entropy Bounds: Accelerating RL Training via MTP with Rejection Sampling

Bebop 的核心判断是：MTP 在 RL rollout 中失速的主因主要来自 policy entropy fluctuation，frozen MTP head 与更新后 policy 的权重漂移影响较小；因此有效方案是把 acceptance method 换成 probabilistic rejection sampling，并用 end to end TV loss 在 RL 前训练 MTP heads，使 draft t...

2606.12370-bebop-mtp-rejection-sampling-rl-training Rollout Optimization Speculative Decoding Multi-Token Prediction