The genetic algorithm was used to obtain sparse arrays with 8, 16, 32 and 64 transducers in a possible aperture size of 128 elements. The optimization was made by minimizing a fitness function that takes into account the ...

This work proposes a new fitness function for sparse linear array design using the Point Spread Function (PSF), where the energy and entropy are combined. The Arithmetic optimization Algorithm is used as a search mechanism, ...

Ultrasonic images have an important contribution to medical diagnosis and nondestructive testing. One strategy to generate an image is to use an array, which is a transducer composed of a set of piezoelectric elements, ...

O ultrassom pode ser utilizado para gerar imagens aplicadas aos ensaios não destrutivos (END) e diagnóstico médico, em que arrays são utilizados para obter imagens com melhor resolução lateral e contraste em relação a um ...

Recently, there is a great interest in sparse representations of signals under the assumption that signals (datasets) can be well approximated by a linear combination of few elements of a known basis (dictionary). Many ...

As ondas ultrassônicas são úteis para a formação de imagens de materiais utilizados na indústria, assim como para diagnósticos médicos por imagem. No âmbito das imagens ultrassônicas, os métodos que otimizam custos físicos ...

Recently, linear formulations and convex optimization methods have been proposed to predict diffusion-weighted Magnetic Resonance Imaging (dMRI) data given estimates of brain connections generated using tractography ...

In this article we analyze the performance of nonuniform linear arrays for Direction of Arrival (DOA) estimation. We use different classes of sparse recovery algorithms to estimate the direction of arrival of the signal ...