About Me

I am Zewei Zhang, a PhD candidate in Electrical & Computer Engineering at McMaster University, supervised by Prof. Jun Chen. I am currently an Applied Scientist Intern at Amazon in Toronto and was a visiting PhD student at the University of British Columbia with Prof. Renjie Liao.

My research lies at the intersection of generative modeling, video and trajectory prediction, controllable editing, and learning-guided search. I am interested in models that reason over motion, structure, and time, and in evaluation methods that reveal how these models behave beyond short, isolated examples.

I am increasingly interested in AI systems that learn from experience, beyond pretraining, retrieval, or static supervision. I view generation, evaluation, and search as an iterative feedback loop, where model outputs, observed failures, and interactions with the environment inform future improvement. This motivates my interest in memory, adaptation, and self-improving systems that turn repeated experience into reusable abstractions, better control, and more reliable decision-making.

News

  • May 2026 Joined Amazon in Toronto as an Applied Scientist Intern, focusing on human-guided video-to-video motion editing.
  • Mar 2026 Released TrajLoom, a dense future trajectory generation framework for long-horizon video modeling.
  • Jan 2026 Boolean Satisfiability via Imitation Learning was accepted to ICLR 2026.
  • Jun 2025 Began a visiting PhD position at UBC with Prof. Renjie Liao, working on trajectory-based video generation and evaluation.
  • Mar 2025 GoodDrag was accepted to ICLR 2025.

Selected Research

Predicting dense future trajectories from observed video context.

TrajLoom: Dense Future Trajectory Generation from Video

Predicts how dense points in a video will move and remain visible into the future, turning observed motion into structured trajectory signals for long-horizon video generation and editing.

Zewei Zhang, Jia Jun Cheng Xian, Kaiwen Liu, Ming Liang, Hang Chu, Jun Chen, and Renjie Liao

arXiv preprint, 2026

KeyTrace illustration for imitation learning in SAT solving
Learning search decisions from compact expert solver traces.

Boolean Satisfiability via Imitation Learning

Learns SAT-solving decisions from compact expert traces, turning previous solver experience into a branching policy that guides future combinatorial search.

Zewei Zhang, Huan Liu, Yuanhao Yu, Jun Chen, and Xiangyu Xu

ICLR, 2026

Interactive point-based editing with diffusion models.

GoodDrag: Towards Good Practices for Drag Editing with Diffusion Models

Improves point-based image editing with diffusion models by alternating user-guided dragging and denoising, producing more stable and faithful edits with fewer accumulated artifacts.

Zewei Zhang, Huan Liu, Jun Chen, and Xiangyu Xu

ICLR, 2025

Education

McMaster University

PhD Candidate in Electrical & Computer Engineering

Supervisor: Prof. Jun Chen

Sep 2022 - Present

University of British Columbia

Visiting PhD Student

Host: Prof. Renjie Liao

Jun 2025 - Mar 2026

Zhejiang Gongshang University

B.S. in Telecommunication Engineering

Sep 2018 - Jun 2022

Experience / Teaching / Awards

Applied Scientist Intern, Amazon Toronto, Canada · May 2026 to Present

Developing a human-guided video-to-video motion editing model that maps high-level motion instructions and user modification intents into dense trajectory controls, with evaluation for motion fidelity, edit controllability, source preservation, and temporal consistency.

Teaching Assistant, McMaster University 2022 to Present

COMPENG 3SM4: Algorithm Design and Analysis; COMPENG 4SL4: Fundamentals of Machine Learning.

Meritorious Winner, Interdisciplinary Contest in Modeling Top 8%, Feb 2020

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