Πλοήγηση ανά Συγγραφέα "Varsamis, Dimitris N."
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Τεκμήριο A Locally Recurrent Globally Feed-Forward Fuzzy Neural Network for Processing Lung Sounds(2007) Mastorocostas, Paris A.; Varsamis, Dimitris N.; Mastorocostas, Costas A.; Hilas, Costas S.This paper presents a locally recurrent globally feedforward fuzzy neural network, with internal feedback, that performs the task of separation of lung sounds, obtained from patients with pulmonary pathology. The filter is a novel generalized Takagi-Sugeno-Kang fuzzy model, where the consequent parts of the fuzzy rules are Block-Diagonal Recurrent Neural Networks. Extensive experimental results, regarding the lung sound category of squawks, are given, and a performance comparison with a series of other fuzzy and neural filters is conducted, underlining the separation capabilities of the proposed filter.Τεκμήριο On the Newton bivariate polynomial interpolation with applications(2014-01) Varsamis, Dimitris N.; Karampetakis, Nicholas P.The main purpose of this work is to provide recursive algorithms for the computation of the Newton interpolation polynomial of a given two-variable function. The special case where the interpolation polynomial has known upper bounds on the degree of each indeterminate is studied and applied to the computation of the inverse of a two-variable polynomial matrix.Τεκμήριο A Recurrent Neural Filter for Adaptive Noise Cancellation(2006) Mastorocostas, Paris A.; Varsamis, Dimitris N.; Mastorocostas, Constantinos A.; Hilas, Constantinos S.This paper presents a dynamic neural filter for adaptive noise cancellation. The cancellation task is transformed to a system-identification problem, which is tackled by use of the Block-Diagonal Recurrent Neural Network. The filter is applied to a benchmark noise cancellation problem, where a comparative analysis with a series of other dynamic models is conducted, underlining the effectiveness of the proposed filter and its superior performance over its competing rivals.