Doppler spectral analysis for two-dimensional time-evolving nonlinear sea surfaces

2010 ◽  
Author(s):  
Xiaofei Li ◽  
Xiaojian Xu
Keyword(s):  
Spectral Analysis ◽  
Two Dimensional ◽  
Doppler Spectral Analysis

scholarly journals On the detection of corrosion pit interactions using two-dimensional spectral analysis

2010 ◽  
Vol 52 (2) ◽  
pp. 303-313 ◽  
Author(s):  
Adil Jarrah ◽  
Jean-Marie Nianga ◽  
Alain Iost ◽  
Gildas Guillemot ◽  
Denis Najjar
Keyword(s):  
Spectral Analysis ◽  
Two Dimensional ◽  
Corrosion Pit

Noninvasive Detection of Iliac Artery Disease and Prediction of Its Severity from Doppler Spectral Analysis in Common Femoral Artery

Angiology ◽  
1997 ◽  
Vol 48 (7) ◽  
pp. 615-621 ◽  
Author(s):  
Shinji Makita ◽  
Atsushi Ohira ◽  
Hirofumi Murakami ◽  
Shigehiro Itoh ◽  
Katsuhiko Hiramori ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Femoral Artery ◽  
Iliac Artery ◽  
Common Femoral Artery ◽  
Noninvasive Detection ◽  
Artery Disease ◽  
Doppler Spectral Analysis

scholarly journals Two-Dimensional Spectral Analysis of Soil Surface Temperature

Hilgardia ◽  
1988 ◽  
Vol 56 (3) ◽  
pp. 1-28 ◽  
Author(s):  
M. Bazza ◽  
R. H. Shumway ◽  
D. R. Nielsen
Keyword(s):  
Spectral Analysis ◽  
Surface Temperature ◽  
Soil Surface ◽  
Two Dimensional ◽  
Soil Surface Temperature

scholarly journals RESONANCES OF COASTAL WATERS BETWEEN PERTH AND GERALDTON (WESTERN AUSTRALIA)

1980 ◽  
Vol 1 (17) ◽  
pp. 16 ◽  
Author(s):  
H. Allison ◽  
A. Grassia ◽  
R. Litchfield
Keyword(s):  
Spectral Analysis ◽  
Coastal Waters ◽  
Statistical Estimation ◽  
Model Comparison ◽  
Two Dimensional ◽  
Resonance Frequencies ◽  
Sea Level Oscillations ◽  
Near Shore ◽  
Quality Factor Q ◽  
Western Australian

Sea-level oscillations along the Western Australian coast, with periods in the range of 20-40 mins, have considerably greater amplitudes between Perth and Geraldton than at other locations along the coastline. It is shown that amplification of these oscillations is due to resonance in the near shore basin formed by the shore and a submerged reef-chain parallel to and 5 km from the shore. The rigorous analytical solution for the resonance frequencies is obtained for the two-dimensional hydrodynamic model. Comparison with results from spectral analysis of recorded oscillations indicates a satisfactorily agreement with the theory. Statistical estimation of damping of the observed oscillations indicates that the predominant resonance in the first mode is sharp, having the quality factor Q=10.

scholarly journals Spectral Analysis of Sampled Signals in the Linear Canonical Transform Domain

2012 ◽  
Vol 2012 ◽  
pp. 1-19 ◽  
Author(s):  
Bing-Zhao Li ◽  
Tian-Zhou Xu
Keyword(s):  
Spectral Analysis ◽  
Spectral Representation ◽  
Digital Signal ◽  
Sampling Theorem ◽  
Transform Domain ◽  
Linear Canonical Transform ◽  
Two Dimensional ◽  
Research Papers ◽  
One Dimensional ◽  
Uniform Sampling

The spectral analysis of uniform or nonuniform sampling signal is one of the hot topics in digital signal processing community. Theories and applications of uniformly and nonuniformly sampled one-dimensional or two-dimensional signals in the traditional Fourier domain have been well studied. But so far, none of the research papers focusing on the spectral analysis of sampled signals in the linear canonical transform domain have been published. In this paper, we investigate the spectrum of sampled signals in the linear canonical transform domain. Firstly, based on the properties of the spectrum of uniformly sampled signals, the uniform sampling theorem of two dimensional signals has been derived. Secondly, the general spectral representation of periodic nonuniformly sampled one and two dimensional signals has been obtained. Thirdly, detailed analysis of periodic nonuniformly sampled chirp signals in the linear canonical transform domain has been performed.

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