ChatPPG.

Wenlong Wu

Xiaomi Inc.

Wenlong Wu has 1 paper in the ChatPPG research atlas (2026), linked to 1 model, with work using 2 datasets and 7 co-authors in the atlas. Main topics: PPG, contrastive, ssl, soft-negatives, peking-university, xiaomi.

Papers

  • DNA-PPG: A Foundation Model for Photoplethysmography via Dual Neighborhood Alignment
    2026 · IJCAI-2026

    A direct attack on PaPaGei-S, from the loss function rather than the architecture. The claim is that the two standard ways of building a PPG contrastive objective are both wrong in a specific, fixable way. First, instance discrimination (Apple's 141k-participant model, SimCLR-style) declares every segment from a different subject a negative — which means two people with near-identical pulse morphology get actively pushed apart, distorting the manifold.

    • Venue: IJCAI-2026 (Thirty-Fifth IJCAI, Special Track on AI and Health), pp. 6984-6992
    • Subjects: 8441
    • Signals: PPG

Models

Datasets used in this work

  • PPG-DaLiA: PPG dataset for motion compensation / HR
  • WESAD: Wearable Stress and Affect Detection

Co-authors

Chunlong TuGuosong GaoJinshi CuiJunshi LuLi WangYang ZhangYizhang Yang