Jiacheng Qiu

About

I am a Ph.D. student in Data Science at Stony Brook University, supervised by Sima Mofakham and Petar M. Djurić. My broad research interests include multimodal large language models (MLLMs), video understanding, agentic AI, motion analysis, and clinical applications of AI.

My current work focuses on MLLM post-training, MLLM-based agents, LLM safety, and AI for ICU settings.

Previously, I earned my M.S. in Data Science at the Halıcıoğlu Data Science Institute, UC San Diego, where I worked with Tauhidur Rahman on event-based vision, synthetic event generation, and continuous motion estimation.

For research inquiries, please contact me by email.

Publications

Less Data, Better Timing: Student–Curriculum Coupling for VLM On-Policy Distillation in Temporal Video Grounding

Jiacheng Qiu, Yunsoo Kim, Ruichen Xu, Jian Luo, Petar M. Djurić, Sima Mofakham

arXiv preprint · 2026
ICU-TRACE: Forecasting of Agitation in the ICU Setting from Bedside Video Using a Temporal Risk-Aware Causal Encoder

Noah Lubin^*, Yunsoo Kim^*, Jiacheng Qiu^*, Yindong Hua, Seyed Morsal Mosallami Aghili, Alfonse Mazzarella, Carla Vanessa Myslborki Roncancio, Aniket Singh, Nipun Irabatti, Sujith Swarna, Chiemeka Uwakwe, Jermaine Robertson, Alisha Ahsan, Catherine Walsh, Charles Mikell, Petar M. Djurić, Sima Mofakham

bioRxiv preprint · 2026* Co-first authors
Confidence Inflation from RL Post-Training in Video Language Models

Yunsoo Kim, Jiacheng Qiu, Petar M. Djurić, Sima Mofakham

arXiv preprint · 2026
Does On-Policy Distillation for Safety Pose Backdoor Risks?

Jian Luo, Kehan Qi, Qingqiao Hu, Meilong Xu, Jiacheng Qiu, Wenbin Lyu, Jiawei Zhou, Chao Chen

arXiv preprint · 2026
PDE-OBS: Controlled Evaluation Across Observation Patterns

Ruichen Xu, Siyao Wang, Fang Wan, Jiacheng Qiu, Wenhan Gao, Jiaxing Zhang, Linsey Pang, Ravid Shwartz Ziv, Yann LeCun, Yuefan Deng

arXiv preprint · 2026

arXiv PDF
SCOPE: Observation-Conditioned Full-Target Prediction for Sparse PDE Inference

Ruichen Xu, Siyao Wang, Fang Wan, Jiacheng Qiu, Wenhan Gao, Jiaxing Zhang, Linsey Pang, Ravid Shwartz Ziv, Prakhar Mehrotra, Yann LeCun, Yuefan Deng

arXiv preprint · 2026

arXiv PDF
Labits: Layered Bidirectional Time Surfaces Representation for Event Camera-based Continuous Dense Trajectory Estimation

Zhongyang Zhang^*, Jiacheng Qiu^*, Shuyang Cui, Yijun Luo, Tauhidur Rahman

arXiv preprint · 2024* Co-first authors

arXiv PDF