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Article . 2016
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No-estacionariedad, multifractalidad y limpieza de ruido en señales reales

Authors: Torres, Maria Eugenia; Schlotthauer, Gaston;

No-estacionariedad, multifractalidad y limpieza de ruido en señales reales

Abstract

Las señales biomédicas, como el electrocardiograma, el electroencefalograma, o la señal de voz, tienen en común características de no estacionariedad y no linealidad. Aunque enmuchas aplicaciones seconsidera que se trata de señales estacionarias procedentes de sistemas lineales, ésta simplificación constituye una hipótesis de trabajo válida sólo como una aproximación que permite la aplicación de técnicas clásicas deanálisis de señales. Muchos trastornos que afectan a uno o varios órganos pueden ser detectados a través de un correcto análisis de las señales en cuya producción están involucrados. Sin embargo, debe atenderse al hecho de que una señal procedente de un sistema patológico se aleja aún más de las condiciones hipotéticas de estacionariedad y linealidad. Se desprende de esta circunstancia la necesidad de abordar el análisis de las señales biomédicas mediante técnicas no convencionales que permitan su tratamiento en un marco que tenga en cuenta sus características de no estacionariedad y no linealidad. Sobre la base de la experiencia del grupo de trabajo en las áreas del análisis tiempo-frecuencia/escala, análisis y modelado estadístico, análisis multifractal, complejidad y métodos guiados por los datos (adaptativos), a partir de problemas reales se han propuesto y estudiado nuevas técnicas que posibiliten su solución.

The biomedical signals, such as electrocardiogram, electroencephalogram, or voice signal, have in common its nonstationarity and nonlinearity. Although in many applications they are considered as stationary signals and they come from linear systems, this is a simplification that is a valid hypothesis only as an approximation that allows the application of classic techniques of signal analysis. Many disorders affecting one or more organs can be detected by a correct analysis of the signals that are produced by these organs. However, it must be considered that a signal coming from a pathological system is far from the hypothetical conditions of stationarity and linearity. It follows from this fact the need of addressing the analysis of biomedical signals using unconventional techniques that allow its treatment in a framework that takes into account the characteristics of nonstationarity and nonlinearity. Based on the experience of the working group in the areas of time-frequency/scale analysis, statistical analysis and modeling, multifractal analysis, complexity and data-driven (adaptive) methods, we propose proposed and studied new techniques from real problems that will enable their solution.

Fil: Schlotthauer, Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Entre Ríos. Universidad Nacional de Entre Ríos. Centro de Investigaciones y Transferencia de Entre Ríos; Argentina

Fil: Torres, Maria Eugenia. Universidad Nacional de Entre Ríos. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina

Country
Argentina
Keywords

Inteligencia computacional, Análisis de señales, Señales biomédicas, https://purl.org/becyt/ford/2.2, Procesamiento de señales, https://purl.org/becyt/ford/2, Reconocimiento de patrones

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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