Exploració per tema "Camps vectorials"
Ara es mostren els items 1-10 de 10
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A Vector Approach for Noise Parameter Fitting and Selection of Source Admittances
(IEEE Microwave Theory and Techniques Society, 1991-08)
Article
Accés obertSimple vector concepts can be used in the determination of noise parameters from measured data. The use of such concepts leads to a simplification in the least-square fitting algorithm, complete determination of the ... -
An energy prediction method using adaptive Neuro-Fuzzy Inference System and Genetic Algorithms
(2013)
Text en actes de congrés
Accés restringit per política de l'editorialThis document presents an energy forecast methodology using Adaptive Neuro-Fuzzy Inference System (ANFIS) and Genetic Algorithms (GA). The GA has been used for the selection of the training inputs of the ANFIS in order to ... -
Gale duality bounds on the location of roots of polynomials with nonnegative coefficients
(2010-04)
Article
Accés obertWe bound the location of roots of polynomials that have nonnegative coefficients with respect to a fixed but arbitrary basis of the vector space of polynomials of degree at most d. For this, we interpret the basis polynomials ... -
Medium Rate Speech Coding with Vector Quantization
(1989)
Text en actes de congrés
Accés obert -
On the 16th Hilbert problem for limit cycles on nonsingular algebraic curves
(2011-01-15)
Article
Accés restringit per política de l'editorialWe give an upper bound for the maximum number N of algebraic limit cycles that a planar polynomial vector field of degree n can exhibit if the vector field has exactly k nonsingular irreducible invariant algebraic curves. ... -
On the integrability of polynomial fields in the plane by means of Picard-Vessiot theory
(2012-01-12)
Report de recerca
Accés obertWe study the integrability of polynomial vector fields using Galois theory of linear differential equations when the associated foliations is reduced to a Riccati type foliation. In particular we obtain integrability results ... -
On the singular Weinstein conjecture and the existence of escape orbits for b-Beltrami fields
(2021-07-01)
Article
Accés obertMotivated by Poincaré’s orbits going to infinity in the (restricted) three-body problem (see [26] and [6]), we investigate the generic existence of heteroclinic-like orbits in a neighbourhood of the critical set of a ... -
Phase portraits of random planar homogeneous vector fields
(2019-11-26)
Report de recerca
Accés obertWe study the phase portraits with positive probability of random planar homogeneous vector fields of degree n. In particular, for n=1,2,3, we give a complete solution of the problem and, moreover, either we give the exact ... -
Phase portraits of random planar homogeneous vector fields
(2021-04)
Article
Accés obertIn this paper, we study the probability of occurrence of phase portraits in the set of random planar homogeneous polynomial vector fields, of degree n. In particular, for n=1,2,3, we give the complete solution of the ... -
Reduction of output common mode voltage using a novel SVM implementation in matrix converters for improved motor lifetime
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Article
Accés restringit per política de l'editorialThis paper presents the study of an alternative Space Vector Modulation (SVM) implementation for Matrix Converters (MC) which reduces the output Common Mode (CM) voltage. The strategy is based on replacing the MC zero ...
