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Zhen Liu
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@ItsTheZhen

Zhen Liu

@ItsTheZhen
Assistant Prof @ CUHK-SZ. PhD at @Mila_Quebec & @UMontreal, MS & BS at @GeorgiaTech and ex-visitor at @MPI_IS. Deep Learning/Foundation Models/3D Generation.
Montreal, QC
itszhen.com
Joined November 2015
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  • @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Dec 5, 2025
    Can we efficiently and robustly finetune flow matching models with reinforcement learning using differentiable rewards, in an amortized way? Hint: use optimal control and match your velocity field with value gradients! Please come by our poster “Value Gradient Guidance for
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  • @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Oct 18, 2025
    Can LLMs design real machines — from 🚗 cars to 🏹 catapults? Can they engineer through both 🧠 agentic workflows and 🌀 reinforcement learning (RL) — learning from physical simulation instead of text alone? We treat machine design as “machine code writing”, where LLMs assemble
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  • @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Oct 17, 2025
    TL;DR: Meet BesiegeField—a playground where LLMs build, test, and refine machines from standard parts in real time. We tested agentic workflows and RLVR with top LLMs: even the strongest still show limits in compositional machine design. 🔗 besiegefield.github.io 🧵 below
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    @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Oct 17, 2025
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    02:04
    Human history is marked by the machines we created: from the Antikythera mechanism of ancient Greece, to the imaginations of the Renaissance, to the engines of the steam era. We wonder: can LLMs, like humans, build sophisticated machines to achieve purposeful functionality?
  • @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Oct 17, 2025
    Human history is marked by the machines we created: from the Antikythera mechanism of ancient Greece, to the imaginations of the Renaissance, to the engines of the steam era. We wonder: can LLMs, like humans, build sophisticated machines to achieve purposeful functionality?
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    00:00
    2
  • @ItsTheZhen
    Zhen Liu
    @ItsTheZhen
    Jun 27, 2025
    An alternative to LoRA with nice properties, now scalable!
    @Besteuler
    Weiyang Liu
    @Besteuler
    Jun 26, 2025
    🚀 Meet OFTv2 — Orthogonal Finetuning made scalable, finally. ⚡️ 10× faster 💾 3× less GPU memory 🤖 Quantized OFT: plug-and-play on quantized LLMs, better than QLoRA Try it now on Hugging face PEFT: tinyurl.com/ycxswfe7 Website: spherelab.ai/oftv2/ #AI #LLM 🧵1/6
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