The propagation of acoustic field uncertainty in an ocean waveguide having finite correlation length sound speed variations

2006 ◽  
Vol 120 (5) ◽  
pp. 3183-3183
Author(s):  
Steven Finette
Keyword(s):  
Acoustic Field ◽  
Correlation Length ◽  
Sound Speed ◽  
Finite Correlation

The Rapid Uncertainty Prediction of the Ocean-Acoustic Coupled Model

2020 ◽  
Author(s):  
Baolong Cui ◽  
Wuhong Guo
Keyword(s):  
Computational Complexity ◽  
Acoustic Field ◽  
Sound Speed ◽  
Polynomial Chaos ◽  
Coupled Model ◽  
Polynomial Chaos Expansion ◽  
Chaos Expansion ◽  
Uncertainty Distribution ◽  
Uncertainty Prediction ◽  
Sound Speed Structure

<p>Focusing on the rapid prediction of acoustic field uncertainty in environment with temporal and spatial sound speed perturbation, evolvement of sound speed structure over time is predicted based on the ocean-acoustic coupled model to obtain the uncertainty distribution of the vertical structure of sound speed. Further, a method combining  the arbitrary polynomial chaos expansion with the empirical orthogonal function is proposed to reduce the dimensionality of uncertain parameters and to obtain the uncertainty distribution of the acoustic field. Simulations have shown that the computational complexity can be reduced by 2 orders of magnitude compared to the conventional polynomial chaos expansion while ensures the same precision. Moreover, the computational complexity is not influenced by the complexity of the sound speed profile. The acoustic field and uncertainty predicted in uncertain environment by proposed method also have been tested with the experimental data.</p>

scholarly journals Roughness with a finite correlation length in a microtrap

2010 ◽  
Vol 81 (3) ◽  
Author(s):  
Muzhi Wu ◽  
Xiaoji Zhou ◽  
W. M. Liu ◽  
Xuzong Chen
Keyword(s):  
Correlation Length ◽  
Finite Correlation
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