Exploració per tema "Method of moments"
Ara es mostren els items 1-20 de 30
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A new spectral method for latent variable models
(2018-05-22)
Article
Accés obertWe present an algorithm for the unsupervised learning of latent variable models based on the method of moments. We give efficient estimates of the moments for two models that are well known, e.g., in text mining, the ... -
Accelerated direct solution of the MoM linear system using block compression and nested factorization
(IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialA comparison is presented between different algorithms for direct (non-iterative) accelerated solution of the Method of Moments. The alternatives are common block LU factorization and Compressed Block Decomposition (CBD), ... -
Accurate numerical modeling of the TARA reflector system
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
Article
Accés obertThe radiation pattern of the large parabolic reflectors of the Transportable Atmospheric RAdar system (TARA), developed at Delft University of Technology, has been accurately simulated. The electric field integral ... -
Accurate, grid-robust and versatile combined-field discretization for the electromagnetic scattering analysis of perfectly conducting targets
(2020-04-15)
Article
Accés obertRecent implementations of the Electric-Field Integral Equation (EFIE) for the electromagnetic scattering analysis of perfectly conducting targets rely on the electric current expansion with the monopolar-RWG basis functions, ... -
AIterative algorithm for microwave imaging using the cgm-fft and the pseudoinverse method
(Institute of Electrical and Electronics Engineers (IEEE), 1994)
Text en actes de congrés
Accés obertWithin biomedical microwave tomography, a spatial iterative method for the reconstruction of the complex permittivity of inhomogeneous lossy dielectric objects with arbitrary shape from their scattered electric field is ... -
Discretization of the EFIE in Method of Moments without continuity of the normal current component across edges
(Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialThe discretization in Method of Moments (MoM) of the Electric-Field Integral Equation (EFIE) is traditionally carried out by preserving the continuity of the normal component in the expansion of the current across the ... -
Efficient analysis of thick curved metal sheets
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertThe scattering analysis of perfectly conducting plates with the method-of-moment discretization of the Electric-Field Integral Equation has been traditionally carried out according to the thin-sheet approximation, which ... -
Efficient and accurate electromagnetic scattering analysis of perfectly conducting thick plates
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Text en actes de congrés
Accés restringit per política de l'editorialThe scattering analysis with the Electric-Field Integral Equation by the Method of Moments of perfectly conducting plates is normally carried out through the thin-plate approximation, which models the closed surface as an ... -
Frequency extrapolation of IE-MEI linear system Coefficients in 2D
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe Integral Equation MEI (IE-MEI) method for the sparsification of Method of Moments linear system matrix is revisited here. It achieves cpu computation time and storage memory requirements of order O(N ) (for 2D perfectly ... -
General electromagnetic simulation tool to predict the microwave nonlinear response of planar, arbitrarily-shaped HTS structures
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-03-31)
Article
Accés obertThis work describes a simulation tool being developed at UPC to predict the microwave nonlinear behavior of planar superconducting structures with very few restrictions on the geometry of the planar layout. The software ... -
Grid-robust discretization of integral equations in the electromagnetic scattering analysis of homogeneous targets with geometric singularities
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Text en actes de congrés
Accés restringit per política de l'editorialThe conventional method-of-moment schemes of discretization for the scattering analysis of homogeneous targets, perfectly conducting or dielectric, rely on edge-based basis functions. This restricts the modelling of the ... -
Improving the accuracy of the adaptive cross approximation with a convergence criterion based on random sampling
(2020-07-27)
Article
Accés obertThe accuracy of the Adaptive Cross Approximation (ACA) algorithm, a popular method for the compression of low rank matrix blocks in Method of Moment computations, is sometimes seriously compromised by unpredictable errors ... -
Integral Equation MEI (IE-MEI) analysis of homogeneus dielectric and plasmonic media in 2D
(2015)
Text en actes de congrés
Accés obertThis paper revisits the IE-MEI method and proposes a new formulation for high-loss didectric piecewise-homogeneous media. The aim of this work is lo assess if the bigh localization of surface plasmon polarltons helps in ... -
Integral formulation of the measured equation of invariance: a novel sparse matrix boundary element method
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1996-05-01)
Article
Accés obertA novel integral formulation of the measured equation of invariance method is derived from the reciprocity theorem and implemented for perfectly conducting (PEC) 2-D scattering problems. This formulation uses the electric ... -
Low-rank matrix factorization method for multiscale simulations: a review
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Article
Accés obertIn this paper, a review of the low-rank factorization method is presented, with emphasis on their application to multiscale problems. Low-rank matrix factorization methods exploit the rankdeficient nature of coupling ... -
Method of moments applied to the analysis of rough surfaces modelled by fractals
(2000)
Text en actes de congrés
Accés obertThe Scattering and Emissivity of rough surfaces involve solutions to non-linear differential equations. Different approaches have been used in the literature to obtain approximate solutions under some hypothesis. For example ... -
Method of moments enhancement technique for the analysis of Sierpinski pre-fractal antennas
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-08-31)
Article
Accés obertThe numerical analysis of highly iterated Sierpinski microstrip patch antennas by method of moments (MoM) involves many tiny subdomain basis functions, resulting in a very large number of unknowns. The Sierpinski ... -
Modelo de un proceso de cristalización continua de un sorbete por medio de la metodología de momentos
(Universitat Politècnica de Catalunya. CIMNE, 2013)
Article
Accés obertLa etapa de precongelación es un importante paso en el proceso de manufactura de helados y sorbetes dado que las condiciones de operación tienen una fuerte influencia sobre la microestructura y por consecuencia sobre los ... -
Nested fast adaptive cross approximation algorithm for solving electromagnetic scattering problems
(IEEE Microwave Theory and Techniques Society, 2020-09-28)
Article
Accés obertIn this paper, a Nested Fast Adaptive Cross Approximation (NFACA) algorithm is presented to accelerate the solution of electromagnetic scattering problems. It is based on the Fast Adaptive Cross Approximation (FACA) and ... -
New block ILU preconditioner scheme for numerical analysis of very large electromagnetic problems
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-03-31)
Article
Accés obertLarge electromagnetic scattering and radiation problems are tackled by iterative solvers, which require the use of huge preconditioners. Most often, the incomplete LU decomposition (ILU) of the preconditioner is applied ...
