Yujie Li
Yujie Li has 1 paper in the ChatPPG research atlas (2025), linked to 1 model and 8 co-authors in the atlas. Main topics: Apple, AHMS, Mamba-2, behavioral-data, contrastive-learning, ICML.
Papers
- Beyond Sensor Data: Foundation Models of Behavioral Data from Wearables Improve Health Predictions (WBM)2025 · ICML 2025
WBM is an Apple foundation model built on behavioral data from wearables, such as derived activity and health metrics, instead of raw sensor waveforms. It was trained on more than 2.5 billion hours of data from 162K people in the Apple Heart and Movement Study and evaluated on 57 health tasks. It did best on behavior-driven tasks like sleep prediction and improved further when combined with a PPG foundation model.
- Published: ICML 2025 (Apple ML Research)
- Data: 2.5B+ hours, 162K individuals
- Input: behavioral wearable metrics