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  • microwave tomography using optimization techniques

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 465
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     in this paper, we apply the microwave tomography method combined with optimization techniques for reconstructing the 2-d image of dielectric properties of the breast and early detection of the tumor location. the finite difference time domain method is used to calculate the scattered electromagnetic fields in the forward solver. furthermore, genetic algorithm (ga), particle swarm optimization (pso), and differential evolution algorithm (de) have been used in the inverse solver to update the dielectric properties of the object. a novel cost function is used to overcome the problems associated with the functions used in previous works. to speed up the solution convergence process, the dielectric parameters are divided among four intervals. in addition to the use of a new cost function, the novelty of this work also lies in its first-time use of the particle swarm and differential evolution algorithms in the inverse solver for determining the dielectric parameters of the object which, according to the best of our knowledge, have never been applied in this way before. the numerical results of the simulation experiments indicate that the proposed approach is superior to its rivals in terms of both the convergence speed and the accuracy of the solutions.

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