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Your search keyword '"Goras, Liviu"' showing total 2 results
Start Over Author "Goras, Liviu" Topic artificial neural networks
2 results on '"Goras, Liviu"'

1. On Turing Instability in Nonhomogeneous Reaction-Diffusion CNN’s.

Author

Goras, Liviu, Ungureanu, Paul, and Chua, Leon O.

Subjects
*ARTIFICIAL neural networks, *TURING (Computer program language), *REACTION-diffusion equations
Abstract

Several results on instability in nonhomogeneous architectures able to generate Turing patterns are presented. The approach makes use of the continuity theorem regarding the dependence of polynomial roots on coefficients and of the root-locus techniques for small, and large parameter deviations from their homogeneous values, respectively. The results are valid for any linearized nonhomogeneous discrete model capable of generating Turing patterns. [ABSTRACT FROM PUBLISHER]

Published
2017
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2. An ECG Signals Compression Method and Its Validation Using NNs.

Author

Fira, Catalina Monica and Goras, Liviu

Subjects
*ELECTROCARDIOGRAPHY, *ELECTRIC properties of hearts, *ALGORITHMS, *MEDICAL equipment, *ARTIFICIAL neural networks, *SIGNAL processing, *MATHEMATICAL models, *SIGNAL detection, *MEDICAL research
Abstract

This paper presents a new algorithm for electrocardiogram (ECG) signal compression based on local extreme extraction, adaptive hysteretic filtering and Lempel-Ziv-Welch (LZW) coding. The algorithm has been verified using eight of the most frequent normal and pathological types of cardiac beats and an multi-layer perceptron (MLP) neural network trained with original cardiac patterns and tested with reconstructed ones. Aspects regarding the possibility of using the principal component analysis (PCA) to cardiac pattern classification have been investigated as well. A new compression measure called "quality score," which takes into account both the reconstruction errors and the compression ratio, is proposed. [ABSTRACT FROM AUTHOR]

Published
2008
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