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This contribution presents an overview of some innovative methodologies developed at ELEDIA Research Center of the University of Trento in the context of microwave imaging, inverse scattering, and synthesis problems. The focus of this work is on the use of different methodologies and tools for the reconstruction of unknown objects embedded in an inaccessible region when illuminated by a set of electromagnetic...
The ill-posedness and nonlinearity affecting inverse scattering problems are strictly related to the limited amount of information in the scattering data. Accordingly, the search for approximate solutions satisfying additional constraints coming from different, when available, information sources represent an important aspect to be carefully considered for addressing inverse scattering problems. This...
In electromagnetics, optimization problems generally require high computational resources and involve a large number of unknowns. They are usually characterized by non-convex functionals and continuous spaces suitable for strategies based on Differential Evolution (DE). In such a framework, this paper is aimed at presenting an overview of Differential Evolution-based approaches used in electromagnetics,...
Concerning the state-of-the-art of the application of EAs to inverse scattering, it should be firstly pointed out that their use in computational electromagnetics has a relatively short history, although their use was growing faster from the beginning. However, many of these algorithms (e.g., PSO and ACO) cannot be considered fully developed inversion techniques when compared to other imaging methodologies...
The reconstruction of unknown regions through active microwave imaging techniques requires the retrieval of a large amount of unknown parameters if one aims at fully characterize the electromagnetic properties of the targets under test. Unfortunately, a limited number of independent measurements is available, especially when the scattered field is undersampled because of intrinsic limitations of the...
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