Results 61 to 70 of about 5,081,602 (245)

Weakly Supervised Graph Neural Network for Line Spectrum Extraction

IET Radar, Sonar & Navigation
Mechanically generated sounds, common in industrial process control and surveillance, often exhibit narrowband harmonic features that manifest as line spectra in the time–frequency domain. While convolutional neural networks (CNNs) have been employed for
Kibae Lee, Chong Hyun Lee
doaj   +1 more source

Effectiveness Assessment of Underwater Area Cruise Based on the ADC Method

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater area surveillance plays a crucial role in upholding national security, safeguarding strategic interests, and mitigating potential threats. Despite its significance, a notable gap persists in the availability of comprehensive models for assessing its effectiveness.
Qingwei Liang, Yuxin Lin, Mingyang Luo, Zhanghong Zeng   +3 more
wiley   +1 more source

Radar and Sonar Imaging and Processing

, 2020
The 21 papers (from 61 submitted) published in the Special Issue “Radar and Sonar Imaging Processing” highlighted a variety of topics related to remote sensing with radar and sonar sensors.
Krzysztof Kulpa, Andrzej Stateczny, Witold Kazimierski   +2 more
core   +1 more source

FLSea: Underwater Visual–Inertial and Stereovision Forward‐Looking Data Sets

Journal of Field Robotics, EarlyView.
ABSTRACT Visibility underwater is challenging and degrades as the distance between the subject and the camera increases. That is why forward‐looking underwater computer vision tasks are difficult. We have collected underwater forward‐looking stereovision and visual–inertial image sets using two underwater imaging platforms, a stereo camera rig, and an ...
Yelena Randall, Ori Lifschitz, Tali Treibitz   +2 more
wiley   +1 more source

Dolphin-inspired target detection for sonar and radar [PDF]

, 2014
Gas bubbles in the ocean are produced by breaking waves, rainfall, methane seeps, exsolution, and a range of biological processes including decomposition, photosynthesis, respiration and digestion.
Leighton, T.G., Leighton, T., White, P., White, P.R.   +3 more
core   +1 more source

Mutual Clutter Suppression Techniques for FM Sonars

Archives of Acoustics, 2016
The article presents methods that help in the elimination of mutual clutter as well as the consequences of two FM sounding signal sonars operating in the same body of water and frequency band. An in-depth analysis of mutual clutter was carried out.
Jacek MARSZAL, Mariusz RUDNICKI, Andrzej JEDEL, Roman SALAMON, Iwona KOCHAŃSKA   +4 more
doaj   +1 more source

Formation Control With Obstacle Avoidance of Underwater Swarms Based on Relative Visual Feedback

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater multi‐robot and swarm systems require advanced methodologies for controlling collective behavior. Conventional single‐robot techniques, such as tethering, sonar imaging, and acoustic localization, are not scalable or effective for swarm applications.
Andrea Infanti, Saverio Iacoponi, Saif Alameri, Mohamed El Hanbaly, Mohammed Tarnini, Cesare Stefanini, Giulia De Masi, Federico Renda   +7 more
wiley   +1 more source

Portable passive digital sonar signal processing architecture design and implementation [PDF]

, 2021
“The present work shows the development of a signal processing architecture for a passive sonar with portability capability, using the neww hybrid technology of FPGA and CPU in the same IC package.
HUESCA ALVAREZ, LUIS MIGUEL; 800422, Huesca Álvarez, Luis Miguel   +1 more
core  

Advances in the Design and Functionality of a Compact Multi-Reflecting Time-of-Flight Mass Spectrometer. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale High‐resolution mass spectrometry is routinely used for the analysis of complex samples in pharmaceutical, environmental, and omics related studies. Such applications demand instrumentation to be capable of combining sub‐ppm mass accuracy, high resolving power, rapid full m/z range acquisition over a wide dynamic range.
Wildgoose J, Ferries S, Gethings LA, Daly ME, Palmer ME, Lock R, Vissers JPC, Langridge JI.   +7 more
europepmc   +2 more sources

Dumpsite Seabed Characterization of the San Pedro Basin, CA, From Autonomous Vehicle Observations

Journal of Field Robotics, EarlyView.
ABSTRACT A wide‐area seabed survey was conducted using autonomous underwater vehicles (AUVs) in a known dumpsite off the coast of Southern California that has been found to have widespread sediment contamination from the chemical dichlorodiphenyltrichloroethane (DDT).
Ryan A. McCarthy, Dylan Kriegman, Sophia T. Merrifield, Heidi Batchelor, Eric J. Terrill   +4 more
wiley   +1 more source