Results 51 to 60 of about 3,475,694 (250)

The connectivity sonar

Proceedings of the fourteenth ACM conference on Hypertext and hypermedia - HYPERTEXT '03, 2003
Web sites today serve many different functions, such as corporate sites, search engines, e-stores, and so forth. As sites are created for different purposes, their structure and connectivity characteristics vary. However, this research argues that sites of similar role exhibit similar structural patterns, as the functionality of a site naturally ...
Lempel, Ronny, Amitay, Einat, Carmel, David, Darlow, Adam, Soffer, Aya   +4 more
openaire   +4 more sources

Design and Testing of a Minimal Configuration Underwater Micro‐Glider: Automating Lake and Reservoir Monitoring

Journal of Field Robotics, EarlyView.
ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand, Alan Hunter, Danielle Wain, Lee D Bryant   +3 more
wiley   +1 more source

Robust Underwater Object Detection and Relative Navigation Using Simulation-Aided Sonar Image Translation

한국해양공학회지
Robust underwater object detection and relative navigation remain challenging because of the severe degradation of sonar imagery caused by acoustic noise and artifacts.
Eunsu Kim, Seonghun Hong, Sukmin Yoon
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

Doppler detection for ASW barrier with maritime unmanned systems

, 2023
Anti-submarine warfare (ASW) is a critical capability for navies around the world. One promising approach to enhancing ASW is the use of unmanned maritime systems, which can provide forward-deployed detection capacity and augment manned ASW capabilities.
Koetsier, J.O., Colin, M.E.G.D., Beerens, S.P.   +2 more
core  

Chrs-Net: A Dual-Stream YOLO Network for Underwater RGB–Sonar Object Detection

Journal of Marine Science and Engineering
Underwater RGB–sonar object detection remains challenging due to severe optical degradation, strong sonar noise, and spatial misalignment between heterogeneous modalities.
Chuheng Zhang, Hongli Xu, Pangyi Xiao, Han Wang, Jingyu Ru, Hongxu Yang   +5 more
doaj   +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

Self-Training Can Reduce Detection False Alarm Rate of High-Resolution Imaging Sonar

Applied Sciences
Imaging sonar is a primary means of underwater detection, but it faces challenges of high false alarm rates in sonar image target detection due to factors such as reverberation, noise, and resolution.
Jingqi Han, Yue Fan, Zheng He, Zhenhang You, Peng Zhang, Zhengliang Hu   +5 more
doaj   +1 more source

Feature detection and identification using a sonar-array

Proceedings. 1998 IEEE International Conference on Robotics and Automation (Cat. No.98CH36146), 2002
This work explores techniques for sonar sensor fusion in the context of environmental feature detection and identification for navigation tasks. By detecting common features in indoor environments and using them as landmarks, a robot can navigate reliably, recovering its pose when necessary.
Elizeth Araujo, Roderic A. Grupen
openaire   +3 more sources

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