نتایج جستجو برای: time frequency analysis

تعداد نتایج: 4548791  

2004
Richard Baraniuk Mark Coates Philippe Steeghs

We present an efficient method for robustly calculating time-frequency attributes of a signal, including instantaneous mean frequency, bandwidth, and kurtosis. Most current approaches involve a costly intermediate step of computing a (highly oversampled) 2-d bilinear time-frequency representation (TFR), which is then collapsed to the I-d attribute. Using the principles of hybrid linearhilinear ...

2005
Thomas Lysaght Victor Lazzarini Joseph Timoney

The Modal distribution is a time-frequency distribution specifically designed to model the quasi-harmonic, multi-sinusoidal, nature of music signals and belongs to the Cohen general class of time-frequency distributions. A streaming, object-oriented implementation of the Modal distribution is presented which forms the basis for designing other members of the Cohen class. Implementation of this ...

Journal: :Physica D: Nonlinear Phenomena 2003

Journal: :IEEE Transactions on Signal Processing 2014

Journal: :Journal of Mathematical Analysis and Applications 2023

We study signal processing tasks in which the is mapped via some generalized time-frequency transform to a higher dimensional space, processed there, and synthesized an output signal. show how approximate such methods using quasi-Monte Carlo (QMC) approach. consider cases where representation redundant, having feature axes addition time frequency axes. The proposed QMC method allows sampling bo...

Journal: :Journal of Functional Analysis 2003

Journal: :International Journal of Advanced Research in Science, Communication and Technology 2021

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1391

in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

Journal: :Revista Matemática Iberoamericana 2006

Journal: :Proceedings of the National Academy of Sciences 2017

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