Listando Documents de Congressos por fecha de publicación
Mostrando ítems 1-20 de 174
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Anisotropic low-temperature magnetoresistivity in the normal state of L2−xCexCuO4 single crystals
(1994)We report in-plane ρab(T, H) and c-axis ρc(T, H) electrical magnetoresistivity measurements on several L2−x CexCuO4 (L=Pr, Sm, Nd) superconducting single crystals. It is found that in the normal state ... -
A(-infinity)-interpolation in the ball
(1998)We give a necessary and sufficient condition for a sequence [ak}k in the unit ball of C° to be interpolating for the class A~°° of holomorphic functions with polynomial growth. The condition, which ... -
Browsing a component library using Non-functional Information
(1999)This paper highlights the role of non-functional information when reusing from a component library. We describe a method for selecting appropriate implementations of Ada packages taking non-functional ... -
Blind Inversion of Wiener Systems
(1999)A system in which a linear dynamic part is followed by a non linear memoryless distortion a Wiener system is blindly inverted This kind of systems can be modelised as a postnonlinear mixture and ... -
A fast OFDM-CDMA user demultiplexing architecture
(2000)A fast algorithm based on a butterfly structure is presented that demultiplexes the symbols of a particular type of MC-MA (Multi-Carrier Multiple-Access) modulation previously proposed for indoor ... -
2-Dimensional invariant tori for the spatial isosceles 3-body problem
(2000)We consider the circular Sitnikov problem as a special case of the restricted spatial isosceles 3-body problem. In appropriate coordinates we show the existence of 2-dimensional invariant tori that are ... -
Source separation techniques applied to linear prediction
(2000)The prediction filters are well known models for signal estimation, in communications, control and many others areas. The classical method for deriving linear prediction coding (LPC) filters is often ... -
Algoritmos interactivos para la separación de fuentes y deconvolución de canal mediante Java
(2000)El objetivo de estos programas es crear una herramienta que nos permita, de una manera fácil, entender mejor la separación de fuentes y la deconvolución de canal . Por eso se presenta el diseño, ... -
Simulated Annealing, High-Order Statistics and Mutual Information for Separation of Sources
(2001)In this article, the fusion of a stochastic metaheuristic as Simulated Annealing (SA) with classical criteria for convergence of Blind Separation of Sources (BSS), is shown. Although the topic of ... -
Coarse frequency estimation in ofdm packet oriented systems
(2001)In this paper we derive a fast blind coarse frequency offset estimator for OFDM systems in selective frequency channels. The estimator takes advantage of the strong structure of the OFDM signal. In ... -
Feature Selection, Ranking of Each Feature and Classification for the Diagnosis of Community Acquired Legionella Pneumonia
(2001)Diagnosis of community acquired legionella pneumonia (CALP) is currently performed by means of laboratory techniques which may delay diagnosis several hours. To determine whether ANN can categorize CALP ... -
A morphodynamic mechanism for transverse bars in the nearshore
(2001)Sand bars which are normal to the coastline have been described on sandy beaches Irom low to moderate wave energy (Niedoroda and Tanner, 1979; Konicki and Holman, 2000). A generating mechanism lor such ... -
Nonlinear prediction based on score function
(2002)The linear prediction coding of speech is based in the assumption that the generation model is autoregresive. In this paper we propose a structure to cope with the nonlinear effects presents in the ... -
Web didáctica para la aproximación de funciones mediante redes neuronales
(2002)In this article we presents a project [1] developed to demonstrate the capability that Multi-Layer Perceptrons (MLP) have to approximate non-linear functions [2]. The simulation has been implemented ... -
Blind Inversion of Wiener System using a minimization-projection (MP) approach
(2003)In this paper, a new algorithm for blind inversion of Wiener systems is presented. The algorithm is based on minimization of mutual information of the output samples. This minimization is done through ... -
Initialisation of Nonlinearities for PNL and Wiener systems Inversion
(2003)This paper proposes a very fast method for blindly initial- izing a nonlinear mapping which transforms a sum of random variables. The method provides a surprisingly good approximation even when ... -
Improving algorithm speed in PNL mixture separation and Wiener system inversion
(2003)This paper proposes a very simple method for increasing the algorithm speed for separating sources from PNL mixtures or invertingWiener systems. The method is based on a pertinent initialization of ... -
A Gradient based algorithm for blind inversion of Wiener System using multi-variate score functions
(2003)A Wiener system is a linear time-invariant filter, followed by an invertible nonlinear distortion. Assuming that the input signal is an independent and identically distributed (iid) sequence, we ... -
Speaker recognition improvement using blind inversion of distortions
(2004)In this paper we propose the inversion of nonlinear distortions in order to improve the recognition rates of a speaker recognizer system. We study the effect of saturations on the test signals, trying ...