کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9514658 1632611 2005 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Detection of Subsurface Bubbles with Discrete Electromagnetic Geotomography
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات گسسته و ترکیبات
پیش نمایش صفحه اول مقاله
Detection of Subsurface Bubbles with Discrete Electromagnetic Geotomography
چکیده انگلیسی
In electromagnetic geotomography, the inversion is very ill-posed due to the limita- tion of an angular range of projections, and consequently the reconstructed image is different than the true image. Nevertheless, the reconstruction can be much im- proved if we are interested only in a piece of information on the interior volume of the examined object, e.g. detection of some anomalies (bubbles). We assume that the image can be represented by binary values, hence: Discrete Electromagnetic Geotomography (DEG). In this paper, we discuss two discrete image reconstruction algorithms. The first one uses the D.C. programming to find the integer solution to the penalized least-squares problem. The penalty term is based on the Gibbs distribution. In the second one, the mean field annealing is applied to maximize the Gibbs-Boltzmann distribution associated with the penalized least-squares function. The numerical results are presented for noise-free and noisy data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electronic Notes in Discrete Mathematics - Volume 20, 1 July 2005, Pages 535-553
نویسندگان
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