Results 101 to 110 of about 163,397 (237)

Enhancing underwater target detection: Fusion of spatio‐temporal incompletely‐aligned AIS and sonar information via DTW and multi‐head attention mechanism

IET Radar, Sonar & Navigation
In the field of underwater target detection, the passive sonar is an important means of long‐distance target detection. The sonar detection information typically includes both surface and underwater targets, whereas it is a great challenge on effectively
Wenbo Zhao, Xinghua Cheng, Dezhi Wang, Xiaodan Xiong, Xiaoshuang Zhang   +4 more
doaj   +1 more source

The limits of spatial resolution achievable using a 30kHz multibeam sonar: model predictions and field results [PDF]

, 1998
A Simrad EM300 multibeam sonar was used to attempt to resolve small (-5m high) targets in 450m of water. The targets had previously been surveyed using a deeply towed 59 kHz sidescan sonar.
Gardner, James V., Hughes Clarke, John E., Mayer, Larry A., Torresan, Mike   +3 more
core   +1 more source

Fish welfare in a changing world: New developments and current challenges

Journal of Fish Biology, EarlyView.
Abstract The welfare of non‐human animals is central to ethical discussions on animal use, with increasing attention to fish welfare across research, aquaria, aquaculture, and fisheries. This paper reviews current theoretical approaches to animal welfare and recent advances in defining and assessing fish welfare since the seminal paper by Huntingford ...
Sonia Rey Planellas, João L. Saraiva, Eliane Gonçalves‐de‐Freitas, Pablo Arechavala‐Lopez, Bernice Bovenkerk, Michael Breen, Steven J. Cooke, Martin Føre, Lene Northwood, Lars Helge Stien, Sunil Kadri, Chris Noble, Jonatan Nilsson, Fernando Rodriguez, Cosme Salas, Peter Sandøe, Hans van de Vis   +16 more
wiley   +1 more source

Evaluation of the Performance of the Distributed Phased-MIMO Sonar

Sensors, 2017
A broadband signal model is proposed for a distributed multiple-input multiple-output (MIMO) sonar system consisting of two transmitters and a receiving linear array.
Xiang Pan, Jingning Jiang, Nan Wang
doaj   +1 more source

The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni) [PDF]

, 2006
Multibeam sonar mapping techniques provide detailed benthic habitat information that can be combined with the data on species-specific habitat preferences to provide highly accurate calculations of populations in a particular area. The amount of suitable
Butler, John, Cochrane, Guy, Kvitek, Rikk, Neuman, Melissa, Pinkard, Deanna   +4 more
core  

Lake sturgeon (Acipenser fulvescens) growth and longevity estimated from adult capture–mark–recapture data

Journal of Fish Biology, EarlyView.
Abstract Effective fishery management policy depends on accurate life‐history data, particularly for harvested species. Longevity is a core life‐history trait that is directly related to annual survival and lifetime reproductive potential, but fish longevity is generally not well documented, particularly for long‐lived species.
Edward A. Baker, Scott F. Colborne, Nancy A. Auer, Kim T. Scribner, Douglas L. Larson, Andrew S. Briggs, Ronald M. Bruch, Margaret H. Stadig, Michael C. Donofrio   +8 more
wiley   +1 more source

Autonomous Navigation for Autonomous Underwater Vehicles Based on Information Filters and Active Sensing

Sensors, 2011
This paper addresses an autonomous navigation method for the autonomous underwater vehicle (AUV) C-Ranger applying information-filter-based simultaneous localization and mapping (SLAM), and its sea trial experiments in Tuandao Bay (Shangdong Province, P ...
Tianhong Yan, Yan Liang, Shujing Zhang, Chao Li, Bo He, Hongjin Zhang   +5 more
doaj   +1 more source

A Real-Time Novelty Detector for a Mobile Robot

, 2000
Recognising new or unusual features of an environment is an ability which is potentially very useful to a robot. This paper demonstrates an algorithm which achieves this task by learning an internal representation of `normality' from sonar scans taken as
Marsland, Stephen, Nehmzow, Ulrich, Shapiro, Jonathan   +2 more
core   +1 more source

Efficient multibeam sonar calibration and performance evaluation [PDF]

, 2014
Quantitative applications of mobile multibeam sonar in aquatic ecology and fisheries require accurate and efficient in-tank calibration methodologies.
Brehmer, Patrice, Gerstoft, P., Josse, Erwan, Perrot, Yannick, Roudaut, Gildas   +4 more
core  

The Impact of Autonomous Truck Technology on US Interstate Trade

Journal of Regional Science, EarlyView.
ABSTRACT Recent advances in autonomous and semi‐autonomous vehicle technologies promise substantial cost savings for goods shipped by truck. In this study, we quantify the impacts of these transport cost reductions on the US interstate trade using a structural gravity model of domestic trade. Based on projected cost savings from the widespread adoption
Taejun Mo, Sandy Dall'erba, William Ridley, Yilan Xu, Hyungsun Yim   +4 more
wiley   +1 more source