Results 31 to 40 of about 23,037 (220)
Investigating the influence of the constituent materials on the performance of periodic piezoelectric composite arrays [PDF]
, 2007 This paper describes a theoretical investigation into the influence of the constituent materials on periodic composite array transducer performance. A finite element (FE) model, configured in PZFlex, is used to analyze the performance of a wedge coupled ...
Gachagan, A. +3 more
core +1 more source
Wake-Responsive AUV Guidance Assisted by Passive Sonar Measurements
Journal of Marine Science and EngineeringTo make an Autonomous Underwater Vehicle (AUV) chase a moving target ship that generates wake, wake-responsive guidance can be used. This scenario is applicable to making an underwater torpedo pursue a moving target ship until hitting the target.
Jonghoek Kim
doaj +1 more source
Null Broadening Beamforming for Passive Sonar Based on Weighted Similarity Vector
Journal of Marine Science and Engineering, 2023 Beamforming technology is very important for passive sonar to detect targets. However, the performance of a beamformer is seriously degraded in practical applications due to the complex and changeable underwater environment.
Yuhao Wang, Zhenkai Zhang
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Research advances and development trends in acoustic target detection
Zhongguo Jianchuan YanjiuUnderwater target detection faces severe challenges due to the enhanced acoustic stealth capabilities of targets and the anomalous sound propagation phenomena within complex ocean waveguides.
Yixin YANG +5 more
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Multi-layered piezoelectric composite transducers [PDF]
, 2003 Multilayered piezoelectric materials present themselves as a suitable technology for the development of sub 100kHz transducers. A variety of different configurations have been proposed, including stacked 2-2, 1-3 and 3-1 connectivity configurations ...
Hayward, G., O'Leary, R.L., Parr, A.C.S.
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System locates randomly placed remote objects [PDF]
, 1966 System to locate objects submerged underwater uses active/passive sonar techniques in which a transmitter is attached to the object to be recovered and a receiver is used for search.
Lovelady, R. W., Mc Fall, J. C., Jr.
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Search for the Wreckage of Air France Flight AF 447
, 2014 In the early morning hours of June 1, 2009, during a flight from Rio de Janeiro to Paris, Air France Flight AF 447 disappeared during stormy weather over a remote part of the Atlantic carrying 228 passengers and crew to their deaths.
Keller, Colleen M. +3 more
core +1 more source
A Method for Field Calibration of a Multibeam Echo Sounder [PDF]
, 2011 The use of multibeam echo sounders (MBES) has grown more frequent in applications like seafloor imaging, fisheries, and habitat mapping. Calibration of these instruments is important for understanding and validating the performance of MBES.
Lanzoni, Carlo, Weber, Thomas C.
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FlexMat, EarlyView.Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu +3 more
wiley +1 more source
Sensors, 2021 This paper proposes a method to enhance the quality of detecting and classifying surface vehicle propeller cavitation noise (VPCN) in shallow water by using the improved Detection Envelope Modulation On Noise (DEMON) algorithm in combination with the ...
Nhat Hoang Bach +2 more
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