Results 131 to 140 of about 6,273,313 (270)

Evaluating the Risk of Collision of Seals Swimming Within Metres of Operating Tidal Turbines

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT We used imaging sonar to continuously monitor wildlife at an operational tidal turbine in the Pentland Firth, Scotland, between May 2022 and June 2023. Of 704 detected seal tracks, 347 occurred during turbine operation and 122 of these were detected directly upstream of the rotating blades in the horizontal plane.
Jessica Montabaranom, Douglas Gillespie, Carol Sparling, Emma Longden, Gordon Hastie   +4 more
wiley   +1 more source

Two-dimensional forward-looking sonar image registration by maximization of peripheral mutual information

International Journal of Advanced Robotic Systems, 2017
Monitoring the field of operation of an underwater vehicle is crucial during missions near the sea floor. The forward-looking sonar is often the only available sensor for the observation of the ambient turbid water environment.
Sanming Song, J. Michael Herrmann, Bailu Si, Kaizhou Liu, Xisheng Feng   +4 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

Vocalization Characteristics of the Indo‐Pacific Humpback Dolphins (Sousa chinensis) in Xiamen Bay With Insights on Regional Differences

Ecology and Evolution, Volume 16, Issue 2, February 2026.
The Indo‐Pacific humpback dolphin population in Xiamen Bay was divided into two geographically separated but socially associated communities inhabiting the West and East sub‐regions. Based on 3 years of boat‐based surveys, this study established baseline acoustic characteristics and investigated whether vocal patterns varied with habitat conditions ...
Xuming Peng, Zhiyuan Hua, Fuxing Wu, Fei Zhang, Weijie Fu, Yupeng Li, Chuang Zhang, Wenzhan Ou, Wenjie Xiang, Bing Zhou, Zhongchang Song, Yu Zhang   +11 more
wiley   +1 more source

An Effective Strategy of Object Instance Segmentation in Sonar Images

IET Signal Processing
Instance segmentation is a task that involves pixel-level classification and segmentation of each object instance in images. Various CNN-based methods have achieved promising results in natural image instance segmentation. However, the noise interference,
Pengfei Shi, Huanru Sun, Qi He, Hanren Wang, Xinnan Fan, Yuanxue Xin   +5 more
doaj   +1 more source

Sub‐annual spatiotemporal dynamics of sediment and organic matter storage in beaver ponds

Earth Surface Processes and Landforms, Volume 51, Issue 2, February 2026.
Ponds higher up the beaver cascades showed increasing erosion of sediments following heavier rainfall events, whereas those further down showed increasing sediment accretion. Following periods with less intense rainfall all ponds showed net sediment accretion.
Gareth Bradbury, Alan Puttock, Gemma Coxon, Stewart Clarke, Richard E. Brazier   +4 more
wiley   +1 more source

An Unsupervised Obstacle Segmentation Method for Forward-Looking Sonar Based on Teacher–Student Transfer Learning

Journal of Marine Science and Engineering
Facing the challenges of scarce annotations in forward-looking sonar image segmentation, this paper proposes a teacher–student network for unsupervised domain adaptation.
Sen Gao, Wei Guo, Gaofei Xu, Ben Liu
doaj   +1 more source

Same/Other/All K‐Fold Cross‐Validation for Estimating Similarity of Patterns in Data Subsets

Statistical Analysis and Data Mining: An ASA Data Science Journal, Volume 19, Issue 1, February 2026.
ABSTRACT In many real‐world applications of machine learning, we are interested to know if it is possible to train on the data that we have gathered so far, and obtain accurate predictions on a new test data subset that is qualitatively different in some respect (time period, geographic region, etc.).
Toby Dylan Hocking, Gabrielle Thibault, Cameron Scott Bodine, Paul Nelson Arellano, Alexander F. Shenkin, Olivia Jasmine Lindly   +5 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

Interplay Between Tectonics and Submarine Mass Transport Deposits in Cortes Basin: New High‐Resolution Geophysics in the Outer California Borderland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Outer California Borderland (OCB) is an active transform plate boundary offshore Southern California, where the relationship between faulting and submarine mass transport deposits (MTDs) remains poorly understood. Onshore paleoseismic data provide high‐resolution earthquake records, whereas marine geophysical data capture longer‐term ...
Andrea Fabbrizzi, Jillian M. Maloney, Boe Derosier, Bradley Keith   +3 more
wiley   +1 more source