Results 271 to 280 of about 769,052 (322)
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Journal of Fluid Mechanics, 1971
Waves generated at the stern of a ship must travel through the ship's wake. The effect of the mean flow in the wake refracting the waves is calculated by using a much simplified model. It is found that the waves diverging from the stern of a ship may differ considerably from the bow waves, in qualitative agreement with observation.
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Waves generated at the stern of a ship must travel through the ship's wake. The effect of the mean flow in the wake refracting the waves is calculated by using a much simplified model. It is found that the waves diverging from the stern of a ship may differ considerably from the bow waves, in qualitative agreement with observation.
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IEEE Transactions on Geoscience and Remote Sensing, 2018
Based on a joint analysis of linear Kelvin wake kinematics and water dispersion relation, the features of several components of ship wake are identified in the spectral domain, such as the “X”-shaped Kelvin wake, the narrow “X”-shaped solitary wave ...
Yu-Xin Sun, Peng Liu, Yaqiu Jin
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Based on a joint analysis of linear Kelvin wake kinematics and water dispersion relation, the features of several components of ship wake are identified in the spectral domain, such as the “X”-shaped Kelvin wake, the narrow “X”-shaped solitary wave ...
Yu-Xin Sun, Peng Liu, Yaqiu Jin
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USNA Ship Air Wake Program Overview (Invited)
29th AIAA Applied Aerodynamics Conference, 2011This paper provides an overview of a multi-year research project that involves the systematic investigation of ship air wakes using an instrumented United States Naval Academy (USNA) YP (Patrol Craft, Training). The objective is to validate and improve Computational Fluid Dynamics (CFD) tools that will be useful in determining ship air wake impact on ...
Murray Snyder +6 more
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A novel ship wake detection method based on white top-hat transformation
IEEE Asia-Pacific Conference on Synthetic Aperture Radar, 2019This paper proposes a method to improve the contrast between ship wake and background in radar image so as to better detect the ship wake. The method is based on the white top-hat transformation with the structuring element determined by the edge ...
Moxin Zhao, Yunhua Zhang, Dong Li
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Polarimetric detection and estimation of ship wakes
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293), 2003Classification of Earth natural components within a full polarimetric SAR image is one of the most important applications of radar polarimetry in remote sensing. An unsupervised classification procedure, based on neural networks with competitive architectures, is applied to the full polarimetric SAR images of sea surface and ship wakes for segmentation
E. Pottier, W.M. Boerner, D.L. Schuler
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Instrumentation system for ship air wake measurement
2013 IEEE International Symposium on Robotic and Sensors Environments (ROSE), 2013This paper presents an instrumentation system developed for off-ship measurement of ship air wakes using an instrumented radio controlled (RC) helicopter. We propose the use of an IMU as a sensor to measure air wake in the form of induced vibrations on the helicopter while it maneuvers through regions of active air wake.
Anil Kumar +3 more
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Nonlinear Components of Ship Wake Waves
Applied Mechanics Reviews, 2007Nonlinear components of wakes from large high-speed ships at times carry a substantial part of the wake energy and behave completely differently compared to the classical Kelvin wave system. This overview makes an attempt to summarize the descriptions of nonlinear parts of a ship’s wake.
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A Coupled Simulation of Synthetic Aperture Radar Image of the Narrow Ship Wake
Asia-Pacific Microwave Conference, 2019A coupled simulation is implemented to simulate the synthetic aperture radar (SAR) image of the different patterns of the ship wakes. The computational fluid dynamic (CFD) method is utilized to simulate the flow fields of the ship far wakes, which are a ...
Min Zhang, Le-tian Wang
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2009
While ocean waves were among the first natural phenomenon to be modeled satisfactorily in computer graphics, waves from ships—ship wakes—have been largely ignored. The model presented in this thesis is suitable for animating wakes created by a ship moving along an arbitrary course.
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While ocean waves were among the first natural phenomenon to be modeled satisfactorily in computer graphics, waves from ships—ship wakes—have been largely ignored. The model presented in this thesis is suitable for animating wakes created by a ship moving along an arbitrary course.
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Faint Ship Wake Detection in PolSAR Images
IEEE Geoscience and Remote Sensing Letters, 2018Focusing on the faint turbulent wake detection in polarimetric synthetic aperture radar (PolSAR) images, this letter introduces a novel two-step (coarse and fine processing) detector.
Zhou Xu, B. Tang, Shuiying Cheng
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