Sökning: "time-frequency analysis"
Visar resultat 11 - 15 av 43 avhandlingar innehållade orden time-frequency analysis.
11. Novel Approaches to ECG-Based Modeling and Characterization of Atrial Fibrillation
Sammanfattning : This thesis deals with signal processing algorithms for analysis of the electrocardiogram (ECG) during atrial fibrillation (AF). Such analysis can be used for diagnosing patients, and for monitoring and predicting their response to various treatment. LÄS MER
12. On methods for pattern recognition with application to epileptic electroencephalograms
Sammanfattning : The thesis treats methods for pattern recognition in multichannel electroencephalogram (EEG) signals, for application to diagnostics of epilepsy. Parts I-IV treat methods for feature extraction and clustering of EEG spikes, occurring between epileptic seizures, and part V presents a method for filtering seizure onset EEG signals. LÄS MER
13. Sound Quality of Flue Organ Pipe. An Interdisciplinary Study on the Art of Voicing
Sammanfattning : This thesis presents a research study carried out in collaboration with a department of applied acoustics, a department of musical acoustics and an organ workshop. The description of the sound quality of flue organ pipes has received fairly little attention either in organ-building or scientific literature, despite its importance in the overall quality of the instrument, probably due to the difficulties inherent in doing so. LÄS MER
14. Wavelet and gabor frames and bases : approximation, sampling and applications
Sammanfattning : This thesis is devoted to both theoretical and practical aspects of applied mathematics. It consists of three main parts: Part I consists of an application-oriented introduction to the theory of frames and bases for separable Hilbert spaces, as well as an introduction to the main tools used in the remaining Chapters: Time-frequency analysis, Gabor frames and wavelet frames. LÄS MER
15. Hilbert space frames and bases : a comparison of Gabor and wavelet frames and applications to multicarrier digital communications
Sammanfattning : Several signal processing applications today are based on the use of different transforms. The signals under consideration are written as a linear combination (or series) of some predefined set of functions. Traditionally, orthogonal bases have been used for this purpose, for example, in the discrete Fourier transform. LÄS MER