Jannis Marquardt

Jannis Marquardt

Contact:
Institute for Partial Differential Equations
Technische Universität Braunschweig
Universitätsplatz 2
38106 Braunschweig
Germany

Room: 420 (Forumsgebäude, 4th floor)

 

Email: j.marquardt(at)tu-braunschweig.de

Phone: +49 (531) 391-7408

 

Office hours: By appointment
(You may simply come in if my office door is open. In order to guarantee that the door is open at a desired date and time, please send me a short email in advance.)

Research interests

  • Data-informed simulation of dynamics.
  • Time-adaptivity in Data Assimilation.
  • Optimal control of partial differential equations.
  • Usage of model order reduction in the areas from above.
Sketch of 4D-Var problem
4D-Var Variational Data Assimilation: Influence of an "updated-by-measurements" initial condition to the forecast of a model governed by a dynamic.
Eigenvalues of the Douglas Rachford Algorithm
From "The Degenerate Variable Metric Proximal Point Algorithm and Adaptive Stepsizes for Primal-Dual Douglas-Rachford". Eigenvalues of one of the central iteration mappings.

Publications and Preprints

 

  • A time adaptive optimal control approach for 4D-var data assimilation problems governed by parabolic PDEs
    Carmen Gräßle, Jannis Marquardt
    [https://arxiv.org/abs/2407.20866]

Teaching

Winter term 2024/25

Further information...

...about the current courses are available in Stud.IP!

If you still have questions or uncertainties, please don't hesitate to contact me by mail or by phone. Alternatively, we can also meet face to face in my office.