Jiacheng Liu

🐉 Hi, I'm Jiacheng Liu 刘佳成

I am a first-year Ph.D. student at the SciFi Lab at Cornell University, advised by Prof. Cheng Zhang. My research centers on AI-assisted sensing technologies, with a particular emphasis on wearable form factors. My work focuses on activity-detection systems and assistive devices that provide unobtrusive, seamless monitoring and support.


Before Cornell, I earned a Bachelor of Engineering in Creative Design and Intelligent Engineering (CDIE) at Xinya College, Tsinghua University. I gained research experience in multiple labs, including the PI Lab and the Future Lab at Tsinghua University.

portrait

Research Interests

interests

How can we integrate AI with sensing systems to develop early detection systems and assistive devices for everyday use, providing unobtrusive and seamless health support for individuals with diverse health conditions?

Updates

🏆 I was awarded the Outstanding Undergraduate Thesis.

🏵 I was awarded the Xinya College Academic Excellence Award.

🎉 I will be joining the SciFi Lab at Cornell University as a Ph.D. student in the Department of Information Science.

📩 I have submitted PPG-based Authentication on Smartwatches in Daily Scenarios to IMWUT'25 full paper track.

Research Projects

* indicates co-first author.

bridge

PPG as a Bridge: Cross-Device Identity Transfer with Photoplethysmography

Jiacheng Liu*, Jiankai Tang*, Ruichen Gui, Songqin Cheng, Taiting Lu, Mahanth Gowda, Yuanchun Shi, Yuntao Wang

2025, CHI'26 (Submitted)

speech

NeckVoice: Voice Synthesis for Laryngectomees with On-body Sound Actuation

Ruidong Zhang, Jiacheng Liu, Justin Xiang, Ke Li, Babak Sadoughi, Sam Tilsen, François Guimbretière, Cheng Zhang

2025, Nature Electronics (Submitted)

ppg_authen

Exploring Reliable PPG Authentication on Smartwatches in Daily Scenarios

Jiankai Tang*, Jiacheng Liu*, RENLING TONG, Kai Zhu, Zhe Li, Junliang Xing, Yuanchun Shi, Yuntao Wang

2025, arXiv'25

odoragent

OdorAgent: Generate Odor Sequences for Movies Based on Large Language Model

Yu Zhang, Peizhong Gao, Fangzhou Kang, Jiaxiang Li, Jiacheng Liu, Qi Lu, Yingqing Xu

2024, IEEE VR'24

camera

Camera-Based Remote Physiology Sensing for Hundreds of Subjects Across Skin Tones

Jiankai Tang, Xinyi Li, Jiacheng Liu, Xiyuxing Zhang, Zeyu Wang, Yuntao Wang

2024, CHI'24 Workshop PhysioCHI