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UID:news1919@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20251029T174630
DTSTART;TZID=Europe/Zurich:20251017T110000
SUMMARY:Seminar in Numerical Analysis: Marcella Bonazzoli (Inria\, Institut
  Polytechnique de Paris)
DESCRIPTION:In this talk we are interested in reconstructing the interface 
 between the concrete structure of a hydroelectric gravity dam and the unde
 rlying rock\, using Full Waveform Inversion. Indeed\, it appears that the 
 roughness of the dam-rock interface has an effect on the sliding stability
  of gravity dams. We minimize a regularized misfit cost functional by comp
 uting its shape derivative and iteratively updating the interface shape by
  the gradient descent method. At each iteration\, we simulate time-harmoni
 c elasto-acoustic wave propagation models\, coupling linear elasticity in 
 the solid medium with acoustics in the reservoir. Numerical results using 
 realistic noisy synthetic data demonstrate the method ability to accuratel
 y reconstruct the dam-rock interface\, even with a limited number of measu
 rements. This is joint work with Mohamed Aziz Boukraa\, Lorenzo Audibert\,
  Houssem Haddar and Denis Vautrin.\\r\\nFor further information about the 
 seminar\, please visit this webpage [https://dmi.unibas.ch/de/forschung/ma
 thematik/seminar-in-numerical-analysis/].
X-ALT-DESC:<p>In this talk we are interested in reconstructing the interfac
 e between the concrete structure of a hydroelectric gravity dam and the un
 derlying rock\, using Full Waveform Inversion. Indeed\, it appears that th
 e roughness of the dam-rock interface has an effect on the sliding stabili
 ty of gravity dams. We minimize a regularized misfit cost functional by co
 mputing its shape derivative and iteratively updating the interface shape 
 by the gradient descent method. At each iteration\, we simulate time-harmo
 nic elasto-acoustic wave propagation models\, coupling linear elasticity i
 n the solid medium with acoustics in the reservoir. Numerical results usin
 g realistic noisy synthetic data demonstrate the method ability to accurat
 ely reconstruct the dam-rock interface\, even with a limited number of mea
 surements. This is joint work with Mohamed Aziz Boukraa\, Lorenzo Audibert
 \, Houssem Haddar and Denis Vautrin.</p>\n<p>For further information about
  the seminar\, please visit this <a href="https://dmi.unibas.ch/de/forschu
 ng/mathematik/seminar-in-numerical-analysis/">webpage</a>.</p>
DTEND;TZID=Europe/Zurich:20251017T123000
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