Results 51 to 60 of about 5,633 (244)
Coherent and Noncoherent Joint Processing of Sonar for Detection of Small Targets in Shallow Water
Sensors, 2018 A coherent-noncoherent joint processing framework is proposed for active sonar to combine diversity gain and beamforming gain for detection of a small target in shallow water environments.
Xiang Pan +5 more
doaj +1 more source
Quarterly Journal of the Royal Meteorological Society, EarlyView.We document for the first time how the assimilation of CS2SMOS observations improves the model representation of Arctic sea‐ice thickness (SIT) and its variability: biases are reduced (top row), while excessive variability in the Beaufort Sea and lack of variability in the ice pack are both corrected (bottom row).
Jiping Xie +3 more
wiley +1 more source
Estudo e desenvolvimento de algoritmos de sonar ativo para o mapeamento de áreas submersas [PDF]
, 2015 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2015.Recentes avanços no cenário marítimo brasileiro - como a descoberta e exploração do pré-sal e a ...
Ristow, João Paulo
core
, 2015 This work was financially supported by the U. S. Office of Naval Research grant N00014‐12‐1‐0204, under the project “Multi‐study Ocean acoustics Human effects Analysis” (MOCHA). . L.
Miller, Patrick +7 more
core +1 more source
The use of active sonar to study cetaceans
, 2012 Cetacean species face serious challenges worldwide due to the increasing noise pollution brought to their environment by human activities such as seismic exploration. Regulation of these activities is vaguely defined and uncoordinated.
Bernasconi, Matteo
core +1 more source
Research advances and development trends in acoustic target detection
Zhongguo Jianchuan YanjiuUnderwater target detection faces severe challenges due to the enhanced acoustic stealth capabilities of targets and the anomalous sound propagation phenomena within complex ocean waveguides.
Yixin YANG +5 more
doaj +1 more source
Virtual Elastic Tether: A New Approach for Multi‐Agent Navigation in Confined Aquatic Environments
Journal of Field Robotics, EarlyView.ABSTRACT Underwater navigation is a challenging area in the field of mobile robotics due to inherent constraints in self‐localization and communication in underwater environments. Some of these challenges can be mitigated by using collaborative multi‐agent teams.
Kanzhong Yao +5 more
wiley +1 more source
How man-made interference might cause gas bubble emboli in deep diving whales
, 2014 Recent cetacean mass strandings in close temporal and spatial association with sonar activity has raised the concern that anthropogenic sound may harm breath-hold diving marine mammals.
Miller, Patrick +11 more
core +1 more source
Control System for the Navigation of the Agricultural Robots: A Review
Journal of Field Robotics, EarlyView.ABSTRACT Control systems for the navigation of autonomous agricultural robots—particularly those operating in uneven terrain and in the presence of static or dynamic obstacles—have advanced considerably in recent years. As conventional machinery evolves toward increasingly automated systems, the design of reliable navigation controllers has become ...
Edna Carolina Moriones Polanía +3 more
wiley +1 more source
Active sonar detection and signal excess fluctuations [PDF]
, 1987 The report contains an analysis of an active sonar detection model. A k-out-of-n positive signal excess criterion determines echo detection. The analysis is based on encounter simulations in which signal excess fluctuations are described by either a ...
R. N. Forrest, Forrest, R. N.
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