1,721,249 research outputs found
Control chart for linguistic variables: a method based on the use of linguistic quantifier
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Augmented Quasi-Static Partial Element Equivalent Circuit Models for Transient Analysis of Lossy and Dispersive Magnetic Materials
No full textThis paper presents a novel 3-D time-domain formulation of the partial element equivalent circuit (PEEC) method to model dispersive and lossy linear magnetic materials under the quasi-static hypothesis. The frequency-dependent magnetic permeability is incorporated through a rational approximation of the function appearing in the constitutive relation of material, leading to ordinary differential equations in addition to those derived by applying Kirchhoff voltage and current laws to the PEEC equivalent circuit. The augmented resulting model preserves the circuit interpretation of the standard PEEC models and, thus, can be easily integrated in SPICE-like circuit solvers. Numerical results are presented showing that the proposed time-domain formulation outperforms the frequency-domain counterpart although it requires a larger number of unknowns
An Experiment-Based Methodology for Robust Design of Fault Detection and Isolation Systems
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Quasi-static partial element equivalent circuit models of magneto-dielectric materials
No full textThis study aims to present the formulation of the partial element equivalent circuit (PEEC) for dispersive and lossy linear magneto-dielectric materials under the quasi-static hypothesis. The magnetic permeability and dielectric permittivity are usually available as tabulated data at different frequency samples. They are incorporated in the time-domain PEEC formulation by resorting to a rational approximation of their frequency-dependent constitutive relations. Thus, a set of ordinary differential equations is obtained besides those obtained by enforcing Kirchoff voltage and current laws to the PEEC equivalent circuit. The resulting augmented model preserves the circuit structure of the usual PEEC model and, hence, can be run in Spice-like circuit solvers. The robustness and accuracy of the proposed time-domain approach is tested by comparison with its frequency-domain counterpart despite the larger number of unknowns
Partial Element Equivalent Circuit-Based Transient Analysis of Graphene-Based Interconnects
No full textThis paper presents a three-dimensional time-domain formulation of the partial element equivalent circuit (PEEC) method to model graphene-based interconnects. The frequency-dependent electrical conductivity is incorporated into the time-domain solver by resorting to a fitting process. It is proved that if only the intraband contribution to the electrical conductivity is considered, no additional unknowns are required with respect to a standard PEEC solver. If also the interband is to be modeled, auxiliaries unknowns are introduced to reproduce the dynamic of the material. Numerical examples are presented to validate and demonstrate the capabilities and advantages of the proposed approach. The comparison with a finite element method implementation and also with the frequency-domain PEEC solver shows a satisfactory agreement and a good speedup with respect to the frequency-domain counterpart
Procedura per la determinazione di fluidità del traffico veicolare e di blocco del traffico veicolare a partire da dati di traffico di reti cellulari
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