Impedance circuit identification through spectroscopy is often used to characterize sensors. When the circuit topology is known, it has been shown that the component values can be obtained by genetic algorithms. Also, gene expression programming can be used to search for an adequate circuit topology. In this paper, an improved version of the impedance circuit identification based on gene expression programming ...
In this paper, a non-iterative algorithm for amplitude and phase difference estimation of two acquired sinewaves is presented and analyzed. The method is based on the least-squares fitting of ellipses where the common signal frequency is eliminated from the algorithm.
O objectivo deste trabalho é implementar um simulador, em tempo real, de carga mecânica por forma a aferir os diferentes comportamentos de uma máquina eléctrica em função do tipo de carga a accionar. O protótipo desenvolvido permite ensaiar o comportamento de qualquer tipo de máquina rotativa, inserida num accionamento eléctrico, para vários tipos de carga mecânica. De forma a estudar o comportamento de uma máq...
The field theory of guided waves in optical fibers with step-index profiles and in which both core and cladding are chiral isotropic media is developed. We show that both surface and semileaky modes can propagate in optically active fibers. To shed light on the guidance and leakage properties of chiral isotropic fibers we present a physical interpretation and several numerical results. The new leakage effect as...
Financiadores do RCAAP | |||||||
![]() |
![]() |
![]() |
![]() |
![]() |
![]() |