Results 81 to 90 of about 594,002 (213)

Machine Learning Ship Classifiers for Signals from Passive Sonars

Applied Sciences
The accurate automatic classification of underwater acoustic signals from passive SoNaR is vital for naval operational readiness, enabling timely vessel identification and real-time maritime surveillance.
Allyson A. da Silva, Lisandro Lovisolo, Tadeu N. Ferreira   +2 more
doaj   +1 more source

Epidermal Passive RFID Strain Sensor for Assisted Technologies [PDF]

, 2014
An epidermal passive wireless strain sensor using RFID tags is presented. The tag is intended to detect eyebrow or neck skin stretch where paraplegic patients have the capability to tweak facial muscles.
Rumens, C.V., Rakibet, Osman Ozgur, Batchelor, John C., Holder, Simon J.   +3 more
core   +1 more source

BTSTNet: A Beamforming-Based Target Separation Transformer Network for Passive SONAR

IEEE Access
Passive SONAR has attracted significant attention in covert operations, enabling vessel detection and classification through spectrogram analysis of received signals without active transmission. However, in realistic ocean environments, interference from
Yeonbi Jeong, Chanjun Chun, Yongguk Kim, Yeongseo Shin, Wonyeol Kim   +4 more
doaj   +1 more source

Two-dimensional DOA estimation based on thin array towed by a small autonomous platform

Journal of Measurement Science and Instrumentation, 2021
The small autonomous platform with a thin line array is an important tool for underwater acoustic mobile surveillance. Generally, only one-dimensional（1-D） direction-of-arrival（DOA） of the source signal can be estimated using a thin towed line array.
JIANG Jiajia, YANG Guoliang, LI Chunyue, LI Yao, WANG Xianquan, SUN Zhongbo, DUAN Fajie, FU Xiao   +7 more
doaj  

Tracking sperm whales using passive acoustics and particle filters

, 2011
Passive acoustics provides a powerful tool for marine mammal research and mitigation of the risk posed by high energy anthropogenic acoustic activities through monitoring animal positions.
Hadley, Mark Lyndon, Hadley, M.
core   +1 more source

Hybrid Log-Mel and HPSS-Aided Convolutional Neural Network for Underwater Very-Low-Frequency Remote Passive Sonar Detection

Journal of Marine Science and Engineering
Very-low-frequency (VLF) passive sonar detection is one of the core technologies for maritime surveillance, although its performance is often severely affected by strong impulsive ocean ambient noise interference. This paper, for the first time, proposes
Haitao Dong, Lijian Yang, Yuan Liu, Siyuan Li   +3 more
doaj   +1 more source

Passive acoustic monitoring of beaked whale densities in the Gulf of Mexico [PDF]

, 2015
Funding to support the tag data was also received from the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions.Beaked whales
McDonald, Mark A., Wiggins, Sean M., Frasier, Kaitlin E., Frasier, Kaitlin E, McDonald, Mark, Frasier, Kaitlin, Trickey, Jennifer S., Hildebrand, John, Garrison, Lance P., Marques, Tiago A., Merkens, Karlina, Garrison, Lance P, Wiggins, Sean, Merkens, Karlina P., Marques, Tiago A, McDonald, Mark A, Garrison, Lance, Harris, Danielle, Trickey, Jennifer S, Hildebrand, John A, Wiggins, Sean M, Hildebrand, John A., Baumann-Pickering, Simone, Trickey, Jennifer, Merkens, Karlina P, Thomas, Len   +25 more
core   +1 more source

SoNaR-1. Corpus van 1 miljoen woorden verrijkt met diverse semantische annotaties

, 2012
Item does not contain fulltextHet SoNaR-project is een project dat gefinancierd wordt in het kader van het Nederlands-Vlaams STEVIN-programma. Het project beoogt de aanleg van een groot corpus (minimaal 500 miljoen woorden) geschreven Nederlands.
et al., Oostdijk, N.H.J.
core   +1 more source

A Dynamic Evaluation Method for Collaborative Search Efficiency of Multi-Sonar Systems Under Uncertain Situations

Applied Sciences
In sonar collaborative search tasks, effectively evaluating the collaborative search efficiency is an important way to measure whether a task can be successful, which can also provide strong support for optimizing search schemes.
Shizhe Wang, Weiyi Chen, Zongji Li, Xu Chen   +3 more
doaj   +1 more source

Passive Sonar Target Detection Using Statistical Classifier and Adaptive Threshold

, 2017
This paper presents the results of an experimental investigation about target detecting with passive sonar in Persian Gulf. Detecting propagated sounds in the water is one of the basic challenges of the researchers in sonar field.
Hamed Komari Alaie, Hassan Farsi
core   +1 more source