Results 251 to 260 of about 769,052 (322)
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Measured turbulence in ship wakes
The Journal of the Acoustical Society of America, 2001Large surface ships moving at high speed generate extremely turbulent velocity fields containing high concentrations of air bubbles that are distributed in a nonuniform manner. The bubbles are acoustically active, making sonar a useful tool for imaging the ship wake and measuring the spatial and temporal variations of the bubbles.
R. Lee Culver, David Bradley
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IEEE Canadian Journal of Electrical and Computer Engineering
Ship wake detection provides a supplementary way for ship target detection; however, the detection performances of small and slow targets under high sea state are always unsatisfying. Also, the potential of polarimetric enhancement and deep learning (DL)
Yanni Jiang, Ke Li, Ziyuan Yang, Tao Liu
semanticscholar +1 more source
Ship wake detection provides a supplementary way for ship target detection; however, the detection performances of small and slow targets under high sea state are always unsatisfying. Also, the potential of polarimetric enhancement and deep learning (DL)
Yanni Jiang, Ke Li, Ziyuan Yang, Tao Liu
semanticscholar +1 more source
Physics of Wave Phenomena, 2017
Detection of ship wakes is utterly important for ship traffic monitoring, security of sea borders, etc. Among standard detection methods there are radar and acoustic sensing, photographing, hyperspectral measurements, and water sample analysis. However, these methods are hardly suitable for detecting wakes of light high-speed boats.
M. Ya. Grishin +6 more
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Detection of ship wakes is utterly important for ship traffic monitoring, security of sea borders, etc. Among standard detection methods there are radar and acoustic sensing, photographing, hyperspectral measurements, and water sample analysis. However, these methods are hardly suitable for detecting wakes of light high-speed boats.
M. Ya. Grishin +6 more
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Ship wake signature suppression
The Journal of the Acoustical Society of America, 2003A method is presented to reduce the quantity of microbubbles having diameters of approximately 1000 microns or less in seawater as a means of ship wake signature suppression. Ultrasonic acoustic energy is projected into a volume of seawater in which the microbubbles reside, e.g., a ship's wake.
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IEEE Geoscience and Remote Sensing Letters
A synthetic aperture radar (SAR) is used to persistently monitor marine areas in all-weather conditions for excellent ship and wake identification. Current deep-learning-based ship wake detection methods rely on supervised learning.
Chengji Xu, Xiaoqing Wang
semanticscholar +1 more source
A synthetic aperture radar (SAR) is used to persistently monitor marine areas in all-weather conditions for excellent ship and wake identification. Current deep-learning-based ship wake detection methods rely on supervised learning.
Chengji Xu, Xiaoqing Wang
semanticscholar +1 more source
2009 Conference on Lasers & Electro Optics & The Pacific Rim Conference on Lasers and Electro-Optics, 2009
The feasibility of test of ship IR wake, the test on the sea by IR system, the image and data processing, the analysis of IR character was presented in this paper.
Yi Qi +4 more
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The feasibility of test of ship IR wake, the test on the sea by IR system, the image and data processing, the analysis of IR character was presented in this paper.
Yi Qi +4 more
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Wake2Wake: Feature-Guided Self-Supervised Wave Suppression Method for SAR Ship Wake Detection
IEEE Transactions on Geoscience and Remote SensingSea clutter and inherent speckle noise in synthetic aperture radar (SAR) images can pose challenges to accurate sea surface target detection, especially for phenomena such as ship wakes reliant on efficient feature extraction.
Chengji Xu +4 more
semanticscholar +1 more source
Analysis of Ship Rotation Effects on the Electromagnetic Scattering of Wake
IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition, 2023To assess the impact of ship rotational motion on radar cross-sectional (RCS), dynamic electromagnetic (EM) scattering simulations were conducted for the wake generated by a ship undergoing roll, pitch, and yaw motions.
Juncheng Yi, Jianxuan Li, Tao Jiang
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Applied Optics
The detection and tracking of ships can be realized by using the laser forward and backward scattering characteristics of ship wake bubbles. In this paper, the detection ability of two kinds of scattering to wake bubbles is studied.
Siguang Zong +5 more
semanticscholar +1 more source
The detection and tracking of ships can be realized by using the laser forward and backward scattering characteristics of ship wake bubbles. In this paper, the detection ability of two kinds of scattering to wake bubbles is studied.
Siguang Zong +5 more
semanticscholar +1 more source
The Effect Of Sea State On Ship Wake Detectability In Simulated Sar Imagery
International Conference on Information Photonics, 2020Ship wake detection methods are mostly based on analyzing real SAR images of the sea surface. This is due to SAR imaging having achieved considerable maturity and becoming effective for their visualization, in particular through Bragg resonance ...
I. Rizaev +3 more
semanticscholar +1 more source