Inverse problem for medium with transient conductivity

✍ Scribed by Irena Yu. Vorgul; Alexander G. Nerukh

• Book ID: 101267283
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 126 KB
• Volume: 19
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19981020)19:3<192::aid-mop6>3.0.co;2-g

✦ Synopsis

struct the shape, location, size, and permittivity of a homogeneous dielectric object quite successfully. It is shown that, even when the initial guess is far from the exact result, this method always converges to the global optimum, while other gradient-type methods usually get trapped in local extremes. Besides, good reconstruction is obtained even when the scattered field is contaminated with random noise. Numerical simulation even shows that a hollow object or a multiplecylinder object can be reconstructed quite well as long as the noise level is F y20 dB. Future work may incorporate other schemes to provide a better initial guess to accelerate the inversion process.