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An optimization approach to multi-dimensional time domain acoustic inverse problems

Författare:
Publiceringsår: 1997
Språk: Engelska
Sidor: 15
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7064)/1-15/(1997)
Dokumenttyp: Rapport
Additional info: Published version: J. Acoust. Soc. Am., Vol. 108, No. 4, pp. 1548-56, 2000.

Sammanfattning

An optimization approach to a multi-dimensional acoustic inverse problem
in the time domain is considered. The density and/or the velocity are reconstructed
by minimizing an objective functional. By introducing dual functions
and using the Gauss divergence theorem, the gradient of the objective
functional is found as an explicit expression. The parameters are then reconstructed
by an iterative algorithm (the conjugate gradient method). The
reconstruction algorithm is tested with noisy data, and these tests indicate
that the algorithm is stable and robust. The computation time for the reconstruction
is greatly improved when the analytic gradient is used.

Disputation

Nyckelord

  • Technology and Engineering

Övriga

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