Results 1 to 10 of about 6,746,316 (343)

The high-overtone p-mode spectrum of the rapidly oscillating AP star HR 1217 (HD 24712) - results of a frequency analysis of 324 hr of multi-site photometric observations obtained during a 46-d time-span in 1986* [PDF]

, 1989
D. W. Kurtz, J. M. Matthews, Peter Martinez, J. Seeman, M. Cropper, J. C. Clemens, T. J. Kreidl, C. Sterken, Hartmut Schneider, W. W. Weiß, S. D. Kawaler, S. O. Kepler, A. van der Peet, D. J. Sullivan, H. J. Wood   +14 more
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New algorithms for the analysis of signals with time varying instantaneous frequency [PDF]

, 2006
Yongmei Wei
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Mesostructures: Beyond Spectrogram Loss in Differentiable Time–Frequency Analysis

, 2023
Cyrus Vahidi, Han Han, Changhong Wang, Mathieu Lagrange, György Fazekas, Vincent Lostanlen   +5 more
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Acoustic Rocket Signatures Collected by Smartphones

Signals
Rockets generate complex acoustic signatures that can be detected over a thousand kilometers from their source. While many far-field acoustic rocket signatures have been collected and released to the public, very few signatures collected at distances ...
Sarah K. Popenhagen, Milton A. Garcés
doaj   +1 more source

Time to Frequency Domain Analysis of Narrow Band Antennas

International Journal of Antennas and Propagation, 2017
This paper presents system modeling of three different single band antennas using the singularity expansion method (SEM). To acquire the accurate physical complex poles and the corresponding residues of the narrow band antenna model, an enhanced Matrix ...
Sajjad Ur Rehman, Majeed A. S. Alkanhal
doaj   +1 more source

A Parametric Time Frequency-Conditional Granger Causality Method Using Ultra-regularized Orthogonal Least Squares and Multiwavelets for Dynamic Connectivity Analysis in EEGs [PDF]

, 2018
Yang Li, Meng-Ying Lei, Weigang Cui, Yuzhu Guo, Hua‐Liang Wei   +4 more
openalex   +1 more source

Analysis Electroencephalogram Signals Using Denoising and Time-Frequency Techniques

, 2021
Samir Elouaham, Azzedine Dliou, Rachid Latif, M. Laaboubi, Hicham Zougagh, K Elkhadiri, L Parrino, Ferri, M Bruni, Terzano, Mg Terzano, Mancia, G Salati, Costani, L Decembrino, Parrino, M Malik, M Naeem Mannan, Shinil Ahmad Kamran, Myung Kang, Jeong Yung, D Safieddine, A Kachenoura, L Albera, A Dliou, R Latif, M Laaboubi, F Maoulainie, S Elouaham, A Dliou, S Elouaham, R Latif, M Laaboubi, H Zougagh, X Chen, X Xu, A Liu, M Mckeown, Z Wang, X He, R Goubran, X Liu, M Torres, M Colominas, G Schlotthauer, P Flandrin, Dliou, Elouaham, Laaboubi Latif, S Elouaham, A Dliou, M Laaboubi, R Latif, N Elkamoun, H Zougagh, S Elouaham, R Latif, B Nassiri, A Dliou, M Laaboubi, F Maoulainine, Marcelo Colominas, Gastn Schlotthauer, Mara Torres, H Han, S Cho, S Kwon, S.-B Cho, A Dliou, R Latif, M Laaboubi, F Maoulainine, ; Elouaham, L Cohen, S Elouaham, R Latif, A Dliou, M Laaboubi, F Maoulainie, H Choi, W Williams   +80 more
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The Synchrosqueezing transform for instantaneous spectral analysis [PDF]

, 2014
The Synchrosqueezing transform is a time-frequency analysis method that can decompose complex signals into time-varying oscillatory components. It is a form of time-frequency reassignment that is both sparse and invertible, allowing for the recovery of ...
Thakur, Gaurav
core  

Multimodal real-time frequency tracking of cantilever arrays in liquid environment for biodetection: Comprehensive setup and performance analysis [PDF]

, 2021
Annalisa De Pastina, Francesco Padovani, G Brunetti, Chiara Rotella, Fabio Niosi, В. Усов, Martin Hegner   +6 more
openalex   +1 more source

Diagnosis of industrial gearboxes condition by vibration and time-frequency, scale-frequency, frequency-frequency analysis

Metalurgija, 2012
In the article methods of vibroacoustic diagnostics of high-power toothed gears are described. It is shown below, that properly registered and processed acoustic signal or vibration signal may serve as an explicitly interpreted source of diagnostic ...
P. Czech
doaj