Results 41 to 50 of about 228,033 (349)

Side-Scan Sonar Image Classification Based on Style Transfer and Pre-Trained Convolutional Neural Networks

Electronics, 2021
Side-scan sonar is widely used in underwater rescue and the detection of undersea targets, such as shipwrecks, aircraft crashes, etc. Automatic object classification plays an important role in the rescue process to reduce the workload of staff and ...
Q. Ge, Fengxue Ruan, Baojun Qiao, Qian Zhang, Xianyu Zuo, Lanxue Dang   +5 more
semanticscholar   +1 more source

Investigation and Numerical Simulation of the Acoustic Target Strength of the Underwater Submarine Vehicle

Inventions, 2022
Modern weapon systems’ survival hinges on their detection capabilities more than anything else. In the active sonar equation, the acoustic target strength is crucial.
Kaveripakam Sathish, Rajesh Anbazhagan, Ravikumar Chinthaginjala Venkata, Fabio Arena, Giovanni Pau   +4 more
doaj   +1 more source

The Use of Multi-beam Sonars to Image Bubbly Ship Wakes [PDF]

, 2005
During the past five years, researchers at Penn State University (PSU) have used upward-looking multi-beam (MB) sonar to image the bubbly wakes of surface ships.
Bradley, David L, Culver, R Lee, Weber, Thomas C.   +2 more
core   +1 more source

Size constancy in bat biosonar? [PDF]

, 2013
Perception and encoding of object size is an important feature of sensory systems. In the visual system object size is encoded by the visual angle (visual aperture) on the retina, but the aperture depends on the distance of the object. As object distance
AH Holway, AS Feng, BC Carstens, BD Lawrence, C Hagemann, C Hagemann, CF Moss, CF Moss, CM DeLong, ES Airapetianz, G Joermann, G Rother, G Schuller, GG Kwiecinski, H Hartrige, HR Goerlitz, HR Goerlitz, JA Simmons, JA Simmons, JA Simmons, JJ Wenstrup, JM Foley, L Wiegrebe, Lutz Wiegrebe, LW Gellermann, M Heinrich, Manuel S. Malmierca, ME Bates, Melina Heinrich, MJ Morgan, MW Holderied, N Kopco, P Holler, P Weissenbacher, R Aubauer, R Haber, RA Suthers, RS Heffner, S Mistry, S Schoernich, SO Murray, SP Dear, SP McKee, U Firzlaff, W Thies   +44 more
core   +2 more sources

Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection

Advanced Materials, EarlyView.
Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel, Haotian Lu, Jiayan Zhang, Desheng Yao, Ananya Bhardwaj, Ramiro Contreras, Karim Sabra, Xiaoyu (Rayne) Zheng   +7 more
wiley   +1 more source

Active sonar target recognition method based on multi‐domain transformations and attention‐based fusion network

IET Radar, Sonar & Navigation
The classification and recognition of underwater targets by an active sonar system remain challenging and complex. Traditional methods have limited classification performance in time and spatially varying ocean channels.
Qingcui Wang, Shuanping Du, Wei Zhang, Fangyong Wang   +3 more
doaj   +1 more source

Elevation Angle Estimations of Wide-Beam Acoustic Sonar Measurements for Autonomous Underwater Karst Exploration

Sensors, 2020
This paper proposes a solution for merging the measurements from two perpendicular profiling sonars with different beam-widths, in the context of underwater karst (cave) exploration and mapping.
Yohan Breux, Lionel Lapierre
doaj   +1 more source

Coupling of Dual Channel Waveform ALS and Sonar for Investigation of Lake Bottoms and Shore Zones

Remote Sensing, 2021
In this work, we proposed to include remote sensing techniques as a part of the methodology for natural lake bottom mapping, with a focus on the littoral zone.
Jarosław Chormański, Barbara Nowicka, Aleksander Wieckowski, Maurycy Ciupak, Jacek Jóźwiak, Tadeusz Figura   +5 more
doaj   +1 more source

Establishing a Multibeam Sonar Evaluation Test Bed near Sidney, British Columbia [PDF]

, 2012
The Canadian Hydrographic Service (CHS), Naval Oceanographic Office (NAVOCEANO) and the Ocean Mapping Group of the University of New Brunswick (OMG) collaborated on establishing a multibeam sonar test bed in the vicinity of the Institute of Ocean ...
Beaudoin, Jonathan, Clarke, J.E. Hughes, Hare, Rob, Whittaker, Clay   +3 more
core   +2 more sources

High Stability of Diketopyrrolopyrrole Polymer Transistors Under Aqueous Condition Toward Biosensing Platform

Advanced Materials Technologies, EarlyView.
We are reporting the first‐time investigation of DPP‐based Organic Field‐Effect Transistor (OFET) devices with high‐stability of signal response in both of ambient and aqueous conditions with PBS solution. ABSTRACT Diketopyrrolopyrrole (DPP)–based conjugated polymers show strong promise for electronic applications, including bioelectronic gas sensors ...
Chattarika Khamhanglit, Yudai Hemmi, Ami Ichikawa, YuanTong Gu, Kuniaki Nagamine, Hiroyuki Matsui, Prashant Sonar   +6 more
wiley   +1 more source