Exploració per tema "Iterative methods"
Ara es mostren els items 29-46 de 46
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On fairness optimization for NOMA-enabled multi-beam satellite systems
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Text en actes de congrés
Accés obertIn a multi-beam satellite communication system, traffic requests are typically asymmetric across beams and highly heterogeneous among terminals. In practical operations, it is important to achieve a good match between the ... -
Practical algorithms for a family of waterfilling solutions
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-02-28)
Article
Accés obertMany engineering problems that can be formulated as constrained optimization problems result in solutions given by a waterfilling structure; the classical example is the capacity-achieving solution for a frequency-selective ... -
Preconditioning techniques in the analysis of finite metamaterial slabs
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
Article
Accés obertIn the method of moments (MoM) electric field integral equation (EFIE) analysis of slabs of metamaterials, we show that a left-preconditioning scheme by blocks gathering interactions between basis functions belonging to ... -
Quality of transmission estimator retraining for dynamic optimization in optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2021-04-01)
Article
Accés obertOptical network optimization involves an algorithm and a physical layer model (PLM) to estimate the quality of transmission of connections while examining candidate optimization operations. In particular, the algorithm ... -
Quantitative images of large biological bodies in microwave tomography by using numerical and real data
(IEE-INST ELEC ENG, 1996-11-01)
Article
Accés obertA new inverse microwave imaging algorithm is presented which has the ability to obtain quantitative dielectric maps of large biological bodies. By using a priori information, obtained with a first order algorithm, the final ... -
Reduction of the model noise in non-linear reconstruction via an efficient calculation of the incident field: application to a 434 MHz Scanner
(Institute of Electrical and Electronics Engineers (IEEE), 1999)
Text en actes de congrés
Accés obertMicrowave tomography has been drastically boosted by the development of efficient reconstruction algorithms based on an iterative solution of the corresponding non-linear inverse problem. The accuracy of the electric field ... -
Robust motion estimation using connected operators
(Institute of Electrical and Electronics Engineers (IEEE), 1997)
Text en actes de congrés
Accés obertThis paper discusses the use of connected operators for robust motion estimation The proposed strategy involves a motion estimation step extracting the dominant motion and a ltering step relying on connected operators ... -
Second-order parameter estimation
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-07-31)
Article
Accés obertThis work provides a general framework for the design of second-order blind estimators without adopting any approximation about the observation statistics or the a priori distribution of the parameters. The proposed ... -
Self-similar prefractal frequency selective surfaces for multiband and dual-polarized applications
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
Article
Accés obertFrequency-selective surfaces (FSS) that have been designed using the iterative techniques of fractals have been fabricated and measured. Fractals contain many scales of the starting geometry, each of which acts as a ... -
Spectral iterative algorithm for RCS computation in electrically large or intermediate perfectly conducting cavities
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-06-01)
Article
Accés obertA novel algorithm designed to compute efficiently and accurately the high-frequency electromagnetic scattering from open-ended waveguide cavities is presented. The cavity is converted into a stepped-waveguide model so that ... -
SSFB: a highly-efficient and scalable simulation reduction technique for SRAM yield analysis
(European Interactive Digital Advertising Alliance (EDAA), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialEstimating extremely low SRAM failure-probabilities by conventional Monte Carlo (MC) approach requires hundreds-of-thousands simulations making it an impractical approach. To alleviate this problem, failure-probability ... -
Study of Kyrlov methods for topology optimization
(Universitat Politècnica de Catalunya, 2023-07-17)
Treball Final de Grau
Accés obertTopology optimization (TOPOPT) focuses on optimizing the mass distribution of a given design space whilst maintaining certain structural properties. In aerospace engineering, the structural design process is often steered ... -
Subset selection for multi-Gabor and non-orthogonal wavelets expansions
(IEEE Signal Processing Society, 1998)
Text en actes de congrés
Accés obertNon-orthogonal wavelets and Gabor or multi-windows Gabor expansions involving well-localized synthesis/analysis functions are characterized by being redundant. This entails that the signal modeling is carried out through ... -
The Hardy Cross method and its implementation in Spain
(2020-05-01)
Article
Accés obertIn May 1930, Hardy Cross (1885-1959) published an article called ‘Analysis of continuous frames by distributing fixed-end moments’ in the American Society of Civil Engineers (ASCE). This article proposed a new approach to ... -
The Koch monopole: a small fractal antenna
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-11)
Article
Accés obertFractal objects have some unique geometrical properties. One of them is the possibility to enclose in a finite area an infinitely long curve. The resulting curve is highly convoluted being nowhere differentiable. One such ... -
Trajectory estimation using an iterative method
(Universitat Politècnica de Catalunya, 2016-07-14)
Treball Final de Grau
Accés obertThe objective of the present TFG is to analyze, using different models, how the traffic flow in a freeway is affected by the implementation of VSL zones, ramp metering, HOV lanes or others. -
Unveiling internal evolution of parallel application computation phases
(Institute of Electrical and Electronics Engineers (IEEE), 2011)
Text en actes de congrés
Accés restringit per política de l'editorialAs access to supercomputing resources is becoming more and more commonplace, performance analysis tools are gaining importance in order to decrease the gap between the application performance and the supercomputers' peak ... -
Use of the most significant autocorrelation lags in iterative me spectral estimation
(1984-04)
Article
Accés obert