Results 41 to 50 of about 75,227 (355)
Using Orthogonal Combined Signals in Broadband ADCP for Improving Velocity Measurement
Journal of Marine Science and Engineering, 2020 Broadband Acoustic Doppler Current Profiler (BBADCP) is a widely used technology in velocity measurements. To adapt to the varied water environment and different measurement requirements, flexible tuning of transmitted signal parameters will improve the ...
Yujing Lin, Fei Yuan, En Cheng
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, 2022 Publisher Copyright: © 2022 IEEE.Time synchronization in autonomous underwater vehicle (AUV) formations is significant for joint underwater survey tasks.
Matsuda, Takumi +5 more
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Resonance-Based Time-Frequency Manifold for Feature Extraction of Ship-Radiated Noise
Sensors, 2018 In this paper, a novel time-frequency signature using resonance-based sparse signal decomposition (RSSD), phase space reconstruction (PSR), time-frequency distribution (TFD) and manifold learning is proposed for feature extraction of ship-radiated noise,
Jiaquan Yan +4 more
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Speckle Noise Reduction in Sonar Image Based on Adaptive Redundant Dictionary
Journal of Marine Science and Engineering, 2020 As acoustic waves are affected by the channel characteristics, such as scattering and reverberation when propagating in water, sonar images often exhibit speckle noise which will cause visual quality of the image to decrease.
Yifan Huang, Weixiang Li, Fei Yuan
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Key point detection method for fish size measurement based on deep learning
IET Image Processing, 2023 Accurate fish size measurement in breeding areas is crucial for the fishing industry. Unlike acoustic methods with high equipment cost and low measurement accuracy, current image‐based methods offer a promising alternative.
Yaozhen Yu, Hao Zhang, Fei Yuan
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Experimental Investigation on Underwater Opto-Acoustic Communication
, 2011 The underwater opto-acoustic communication system for directional acoustic communication between an in-air platform and a submerged platform operating is important.
Tao Liu, Jian Gan Wang, Si Guang Zong
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UAN: underwater acoustic network [PDF]
, 2011 Acoustic networks are for underwater what wifi is for terrestrial networks. The ocean is a nearly perfect media for acoustic waves in which regards long range propagation but poses a number of challenges in terms of available bandwidth, Doppler spread ...
S. M. Jesus +18 more
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A Biological Sensor System Using Computer Vision for Water Quality Monitoring
IEEE Access, 2018 Water pollution has seriously threatened our life, so an effective water quality monitoring mechanism is the most important part of water quality management.
Fei Yuan +3 more
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IEEE Access, 2021 The dynamic topology, narrow transmission bandwidth, and limited energy of sensor nodes in mobile underwater acoustic sensor networks (UASNs) pose challenges to design an efficient and robust network for underwater communications.
Jianying Zhu +5 more
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Underwater acoustic multiplexing communication by pentamode metasurface [PDF]
Journal of Physics D: Applied Physics, 2021 Abstract As the dominant information carrier in water, the acoustic wave is widely used for underwater detection, communication and imaging. Even though underwater acoustic communication has been greatly improved in the past decades, it still suffers from slow transmission speeds and low information capacity.
Zhaoyong Sun +6 more
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