Wszystkie pola: Popov, A. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A Time Domain Model of GPR Antenna Radiation Pattern
Autorzy:: Edemsky, F.
Popov, A.
Zapunidi, S.
Powiązania:: https://bibliotekanauki.pl/articles/226318.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: subsurface sensing
ground penetrating radar
electromagnetic pulse radiation
ground-air interface
time-domain Green function
spatio-temporal radiation pattern
inverse problem
deconvolution
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 3; 407-411
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Estimation of Heart Rate Variability Fluctuations by Wavelet Transform
Autorzy:: Popov, A.
Karplyuk, Y.
Fesechko, V.
Powiązania:: https://bibliotekanauki.pl/articles/226306.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: heart rate variability
HRV fluctuations
HRV wavelet analysis
time-dependent HRV estimation
wavelet transform
Opis:: Technique for separate estimation of fast and slow fluctuations in the heart rate signal is developed. The orthogonal dyadic wavelet transform is used to separate the slow heart rate changes in approximation part of decomposition and fast changes in detail parts. Experimental results using the recordings from persons practicing Chi meditation demonstrated the applicability of estimation heart rate fluctuations with the proposed approach.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 3; 395-400
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Binary Classification of Heart Failures Using k-NN with Various Distance Metrics
Autorzy:: Udovychenko, Y.
Popov, A.
Chaikovsky, I.
Powiązania:: https://bibliotekanauki.pl/articles/226330.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: magnetocardiography
current density imaging
current density distribution map
k-NN classification
negative Tpeak
heart failure diagnostics
Mahalanobis distance
Cityblock distance
Eucleadian distance
Chebyshev distance
Opis:: Magnetocardiography is a sensitive technique of measuring low magnetic fields generated by heart functioning, which is used for diagnostics of large number of cardiovascular diseases. In this paper, k-nearest neighbor (k-NN) technique is used for binary classification of myocardium current density distribution maps (CDDM) from patients with negative T-peak, male and female patients with microvessels (diffuse) abnormalities and sportsmen, which are compared with normal control subjects. Number of neighbors for k-NN classifier was selected to obtain highest classification characteristics. Specificity, accuracy, precision and sensitivity of classification as functions of number of neighbors in k-NN are obtained for classification with several distance measures: Mahalanobis, Cityblock, Eucleadian and Chebyshev. Increase of the accuracy of classification for all groups up to 10% was obtained using Cityblock distance metric in binary k-NN classifier with 19 - 27 neighbors, comparing to other metrics. Obtained results are acceptable for further patient’s state evaluation.
Źródło:: International Journal of Electronics and Telecommunications; 2015, 61, 4; 339-344
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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