Spectral analysis of T wave alternans signal



Spectral analysis of T wave alternans signal
Serinagaoglu, Y; Sabuncuoglu, D; Ider, YZ (1996-11-03)
T wave alternans signal was obtained from a patient who recently recovered from ventricular fibrillation. The power spectrum of the T wave alternans is computed using an Autoregressive model based technique. The signal is found to be a sinusoid at a frequency equal to the half of the heart rate and amplitude modulated with another sinusoid at a lower frequency. Relation between the spectrums of the T wave alternance signal and the RR variation signal is also discussed.
Spectral properties of the Klein-Gordon s-wave equation with complex potential
Bairamov, E; Celebi, AO (1997-06-01)
Let us consider the differential operator L defined by the Klein-Gordon s-wave equation
Spectral envelope analysis of snoring signals
Çavuşoǧlu, Mustafa; Kamaslǎ, Mustafa; Çiloğlu, Tolga; Serinağaoğlu Doğrusöz, Yeşim; Eroǧul, Osman (null; 2008-12-01)
In recent years, several studies have shown the relationship between snoring and obstructive sleep apnea syndrome (OSAS). Besides time domain analysis of snoring signal, the spectral features and shapes of snores can be used to discriminate simple snorers and OSAS patients. In this study, we propose a method to classify simple snorers and OSAS patients based on spectral envelope estimation of snoring signals. The formant frequencies and corresponding bandwidths are computed for both group, and the variation...
Spectral splitting and concentration of broadband light using neural networks
Yolalmaz, Alim; Yüce, Emre (2021-04-01)
Compact photonic elements that control both the diffraction and interference of light offer superior performance at ultra-compact dimensions. Unlike conventional optical structures, these diffractive optical elements can provide simultaneous control of spectral and spatial profiles of light. However, the inverse design of such a diffractive optical element is time-consuming with current algorithms, and the designs generally lack experimental validation. Here, we develop a neural network model to experimenta...
Spectral theory of composition operators on hardy spaces of the unit disc and of the upper half-plane
Gül, Uğur; Alpay, Şafak; Department of Mathematics (2007)
In this thesis we study the essential spectrum of composition operators on the Hardy space of the unit disc and of the upper half-plane. Our starting point is the spectral analysis of the composition operators induced by translations of the upper half-plane. We completely characterize the essential spectrum of a class of composition operators that are induced by perturbations of translations.
Citation Formats
Y. Serinağaoğlu Doğrusöz and Y. z. Ider, “Spectral analysis of T wave alternans signal,” 1996, vol. 4, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/70896.