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A global optimization technique for microwave nondestructive evaluation

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3 Author(s)
Pastorino, M. ; Dept. of Biophys. & Electron. Eng., Genoa Univ., Italy ; Caorsi, S. ; Massa, A.

A global optimization technique based on a genetic algorithm is proposed for microwave nondestructive evaluation. Starting from an integral formulation of the inverse scattering problem, the detection of a flaw in a known host medium is reduced to the minimization of a suitable nonlinear functional relating the measured field to the field predicted at a given iteration. The geometrical parameters of the flaw are retrieved by using a tomographic imaging approach. Numerical results are reported concerning cracks in lossless and lossy structures. The effects of the noise on measured input data are also analyzed.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:51 ,  Issue: 4 )