Results 51 to 60 of about 336,461 (224)

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

Biomimetic robots driven by smart materials: Motion forms, stimulation methods and applications

Responsive Materials, EarlyView.
Biomimetic robots enhance adaptability by mimicking biological systems, but rigid materials limit performance. Smart materials with stimuli responsiveness and shape adaptability enable more flexible actuation and improved environmental interaction.
Zeyu Yang, Yehong Peng, Shibo Xue, Yujiang Zhuang, Xiang Gong, Guiwei Li, Lei Ren, Wenzheng Wu, Luquan Ren   +8 more
wiley   +1 more source

On the Correlation Properties of Permutation Arrays and the Structure of Flipped and Rotated Costas Arrays

IET Signal Processing
Costas arrays, known for their ideal autocorrelation properties, play a vital role in radar, sonar, and communication systems. Traditionally, they are obtained through exhaustive search or algebraic construction.
Jianguo Yao, Yanling Shi, Ziwei Liu, Xiaodong Bai   +3 more
doaj   +1 more source

Environmental Stressors Influence Spatial Complexity in a Fluvial Macrophyte meadow

Remote Sensing in Ecology and Conservation, EarlyView.
This research investigates the nonlinear relationships between environmental stressors and the fine‐scale spatial complexity of a fluvial macrophytes meadow. The use of multivariate spatial analysis allowed us to identify two major environmental gradients (nutrients and light) and two major complexity gradients (related to abundance and fragmentation).
Arthur de Grandpré, Christophe Kinnard, Andrea Bertolo   +2 more
wiley   +1 more source

Dose-response relationships for the onset of avoidance of sonar by free-ranging killer whales [PDF]

, 2014
The authors acknowledge the support of the MASTS pooling initiative (The Marine Alliance for Science and Technology for Scotland) in the completion of this study.
Samarra, Filipa Isabel Pereira, Paul J. Wensveen, Petter H. Kvadsheim, Antunes, Ricardo Nuno, Tyack, Peter Lloyd, Filipa I. P. Samarra, Ana Catarina Alves, Alves, Ana Catarina De Carvalho, Kleivane, Lars, Lam, Frans-Peter A., Ricardo N. Antunes, Miller, Patrick, Wensveen, Paulus Jacobus, Patrick J. O. Miller, Kvadsheim, Petter H., Ainslie, Michael A., Len Thomas, Frans-Peter A. Lam, Michael A. Ainslie, Lars Kleivane, Peter L. Tyack, Thomas, Len, Tyack, Peter Lloyd; id_orcid, Thomas, Len; id_orcid   +23 more
core   +1 more source

Research Progress on Hydrophone Elements and Their Applications in Towed Line Arrays and Imaging Sonar for Underwater Detection

Inventions
Driven by growing marine exploitation and maritime security demands, underwater detection systems impose stringent performance requirements for deep-sea early warning, seabed resource exploration and underwater infrastructure inspection.
Yifan Li, Wei Gao, He Liu, Ping Cui, Xiaohuan Li, Lianjia Zhao, Yongyao Chen   +6 more
doaj   +1 more source

Examining the Role of Economic Complexity and Climate Readiness in the Climate‐Fishing Nexus

Sustainable Development, EarlyView.
ABSTRACT This paper investigates the climate‐fisheries association in Gulf Cooperation Council (GCC) nations from 1999 to 2022. A key objective is to explore the role of both the economic complexity index (ECI) and the climate readiness factor (READ) in the climate‐fishing nexus.
Mohamed Sami Ben Ali, Alanoud Al‐Maadid, Hicham Ayad   +2 more
wiley   +1 more source

UNIQAT: An open‐source toolkit for reproducible image quality assessment in marine surveys

Methods in Ecology and Evolution, EarlyView.
Abstract Modern marine surveys generate tens of thousands of underwater images per expedition, yet many are unusable due to image quality deterioration. Manual quality screening is labour‐intensive, subjective and inconsistent across observers and teams, hindering reproducible science, creating large backlogs of unprocessed imagery, and limiting real ...
Alzayat Saleh, Arjun Chennu
wiley   +1 more source

Selected problems of the design of the multi-element sonar arrays [PDF]

, 2001
The paper discusses the design and technology problems of planar, large-scale sonar arrays. It covers the fundamental operating parameters that bring the original array design to the requirements of an actual sonar system and briefly discusses state of ...
Wojan, Z.
core  

Depth Estimation Method for Continuous Acoustic Signal Targets in Shallow Water Using a Linear Array

IET Radar, Sonar & Navigation
To overcome the limitations of existing methods in processing continuous acoustic signals—particularly issues related to modal aliasing and the constraints of Pekeris waveguide applications—this study proposes a depth estimation approach for continuous ...
Siqi Du, Dong Han, Ning Li
doaj   +1 more source