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Séminaire Equations aux dérivées partielles

organisé par l'équipe Modélisation et contrôle

  • Corentin Houpert

    Physics-Informed Autoencoders for filling missing values in CO2 measurements

    13 janvier 2026 - 14:00Salle de conférences IRMA

    Missing values in measurements for carbon dioxide emissions on drained peatlands remains an open challenge for training forecasting techniques to achieve net zero. At the field scale, existing methods struggle to model CO_2 emissions to fill gaps, especially in nighttime measurements. We propose robust Physics-Informed Autoencoders (PIAEs), which combine the generative capabilities of Autoencoders with the reliability of physical models of Net Ecosystem Exchange (NEE) that quantify CO_2 exchanges between the atmosphere and major carbon pools. Our method integrates equations describing the physical processes and associated uncertainties to fill gaps in NEE measurements from eddy covariance (EC) flux towers. In the PIAE, various sensor measurements are encoded into the latent space, and a set of decoders is then used to approximate the ecosystem parameters and the optimal NEE forecast, directed by dynamics described by a stochastic differential equation. These decoders utilize nighttime and daytime NEE models that describe carbon transfer as a Wiener process. Finally, we use a two-phased training routine with two loss functions describing each phase: Mean Squared Error (MSE) and Maximum Mean Discrepancy (MMD) between the measurements and the reconstructed samples. PIAE outperforms the current state-of-the-art Random Forest Robust on the prediction of nighttime NEE measurements on various distribution-based and data-fitting metrics. We present significant improvement in capturing temporal trends in the NEE at daily, weekly, monthly and quarterly scales.

  • Florian De Vuyst

    TBA

    20 janvier 2026 - 14:00Salle de conférences IRMA

  • Takéo Takahashi

    TBA

    3 février 2026 - 14:00Salle de conférences IRMA

    TBA

  • Barbara Verfuerth

    TBA

    10 février 2026 - 14:00Salle de conférences IRMA

    TBA

  • Corentin Gentil

    TBA

    17 mars 2026 - 14:00Salle de conférences IRMA

    TBA

  • Mabrouk Ben Jaba

    TBA

    24 mars 2026 - 14:00Salle de conférences IRMA

  • Chloé Mimeau

    TBA

    28 avril 2026 - 14:00Salle de conférences IRMA