Results 11 to 20 of about 4,296,969 (159)

Estimation of Sound Speed Profiles Using a Random Forest Model with Satellite Surface Observations

Shock and Vibration, 2022
Sound speed profile (SSP) inversion is usually performed by linear statistical regression, such as the single empirical orthogonal function regression (sEOF-r) model.
Zhenyi Ou, Ke Qu, Chen Liu
doaj   +2 more sources

The Parameterization of the Sound Speed Profile in the Sea of Japan and Its Perturbation Caused by a Synoptic Eddy

Journal of Marine Science and Engineering
This study presents the description of the parameterization of sound speed distribution in the Sea of Japan in the presence of a synoptic eddy. An analytical representation of the background sound speed profile (SSP) on its periphery is proposed.
Mikhail Sorokin, Aleksey Gudimenko, Vladimir Luchin, Andrey Tyschenko, Pavel Petrov   +4 more
doaj   +2 more sources

A Novel Sound Speed Profile Prediction Method Based on the Convolutional Long-Short Term Memory Network

Journal of Marine Science and Engineering, 2022
As an important marine environmental parameter, sound velocity greatly affects the sound propagation characteristics in the ocean. In marine surveying work, prompt and low-cost acquisition of accurate sound speed profiles (SSP) is of immense significance
Bingyang Li, Jingsheng Zhai
doaj   +2 more sources

Ocean Front Reconstruction Method Based on K-Means Algorithm Iterative Hierarchical Clustering Sound Speed Profile

Journal of Marine Science and Engineering, 2021
As one of the most common mesoscale phenomena in the ocean, the ocean front is defined as a narrow transition zone between two water masses with obviously different properties.
Yuyao Liu, Wei Chen, Yu Chen, Wen Chen, Lina Ma, Zhou Meng   +5 more
doaj   +2 more sources

Modeling sound speed profile based on ocean normal mode [PDF]

Frontiers in Marine Science
IntroductionStatistical methods such as empirical orthogonal functions (EOFs) are often used to model the sound speed profile (SSP). However, their statistical nature often leads to the sample dependence and physical fuzziness.MethodThis study proposes a
Ke Qu, Weifeng Yin, Fengqin Zhu, Lei Meng   +3 more
doaj   +2 more sources

Experimental Results of Underwater Sound Speed Profile Inversion by Few-Shot Multi-Task Learning [PDF]

Remote Sensing, 2023
Underwater Sound Speed Profile (SSP) distribution is crucial for the propagation mode of acoustic signals, so fast and accurate estimation of SSP is of great importance in building underwater observation systems.
Wei Huang, Jixuan Zhou, Fan Gao, Junting Wang, Tianhe Xu   +4 more
doaj   +3 more sources

A Novel Method for Inverting Deep-Sea Sound-Speed Profiles Based on Hybrid Data Fusion Combined with Surface Sound Speed

Journal of Marine Science and Engineering
Sound speed profiles (SSPs) must be detected simultaneously to perform a multibeam depth survey. Accurate real-time sound speed profile (SSP) acquisition remains a critical challenge in deep-sea multibeam bathymetry due to the limitations regarding ...
Qiang Yuan, Weiming Xu, Shaohua Jin, Xiaohan Yu, Xiaodong Ma, Tong Sun   +5 more
doaj   +2 more sources

Reconstruction of Ocean Front Model Based on Sound Speed Clustering and Its Effectiveness in Ocean Acoustic Forecasting

Applied Sciences, 2021
As a mesoscale phenomenon of the ocean, the ocean front can directly affect the structural characteristics of sound speed profiles and further affect the acoustic propagation characteristics of the sea area.
Yuyao Liu, Wei Chen, Wen Chen, Yu Chen, Lina Ma, Zhou Meng   +5 more
doaj   +2 more sources

The Effects of Sound Speed Profile to the Convergence Zone in Deep Water

Journal of Marine Science and Engineering, 2022
The structure of a sound speed profile (SSP) in deep water causes refraction of sound rays and Convergence Zones (CZs) of high intensity where the rays focus at shallow depth.
Shuanglin Wu, Zhenglin Li, Jixing Qin, Mengyuan Wang, Wen Li   +4 more
doaj   +2 more sources

Enhanced Inversion of Sound Speed Profile Based on a Physics-Inspired Self-Organizing Map

Remote Sensing
The remote sensing-based inversion of sound speed profile (SSP) enables the acquisition of high-spatial-resolution SSP without in situ measurements. The spatial division of the inversion grid is crucial for the accuracy of results, determining both the ...
Guojun Xu, Ke Qu, Zhanglong Li, Zixuan Zhang, Pan Xu, Dongbao Gao, Xudong Dai   +6 more
doaj   +2 more sources