Forskning
Microwave tomography
2006-01-01 -> 2010-12-31
Forskning
Background
A gradient based optimization methods for time-domain inverse scattering problems where the adjoint problem is used to compute the gradient (Frechet differential). FDTD are used to solve the forward and backward scattering problems. The approach is adapted for multiple parameters, eg ε,μ,σ, as well as dispersive material and anisotropic models such as Debye and Lorentz. Applications include microwave tomography, non-destructive testing,....
Numerical illustrations
Simultaneous identification of the permittivity, permeability, and conductivity.
Final result
Simultaneous identification of a permittivity and a Debye (water) material.
References:
- M. Gustafsson and S. He, An optimization approach to multi-dimensional time-domain electromagnetic inverse problems, URSI 1998.
- M. Gustafsson and S. He, A wave-splitting based optimization approach to multi-dimensional time-domain electromagnetic inverse problems, Mathematics and Computers in Simulation, 50(5-6):541-551 (1999).
- M. Gustafsson and S. He, An optimization approach to two-dimensional time domain electromagnetic inverse problems, Radio Sci. 35(2):525-536 (2000).
- M. Gustafsson and S. He, An optimization approach to multi-dimensional time domain acoustic inverse problems, J. Acoust. Soc. Am., 33(4), 1548-1556 (2000), TEAT-7064.
- M. Gustafsson, Wave splitting in direct and inverse scattering problems, 2000, .pdf.