Results 71 to 80 of about 5,216 (194)

Monitoring Risso's Dolphins in the Northeast Atlantic: A Deep Learning Approach to Classify Echolocation Click Detections

open access: yesMarine Mammal Science, Volume 42, Issue 2, April 2026.
ABSTRACT Large volumes of passive acoustic data are collected by researchers, governments, and conservationists across the globe to monitor species for population assessments and conservation objectives. An analysis bottleneck often exists due to the lack of tools to process large datasets and identify detected signals to the species level.
Thomas Webber   +14 more
wiley   +1 more source

Multiple co-frequency sources DOA estimation for coprime vector sensor arrays.

open access: yesPLoS ONE, 2023
For the problem of direction-of-arrival (DOA) estimation using a coprime array, there are high spatial spectrum outputs of false alarms caused by the overlap of main and grating lobes from subarrays.
Xiao Chen   +4 more
doaj   +1 more source

State of the Art in Swath Bathymetry Survey Systems [PDF]

open access: yes, 1988
In the last decade, advances in real-time computing and data storage capabilities have led to significant improvements in bathymetric survey systems and the single point echo-sounder has now been replaced by a variety of highresolution swath mapping ...
de Moustier, Christian
core   +2 more sources

Robot mapping and localisation in metal water pipes using hydrophone induced vibration and map alignment by dynamic time warping [PDF]

open access: yes, 2017
Water is a highly valuable resource so asset management of associated infrastructure is of critical importance. Water distribution pipe networks are usually buried, and so are difficult to access.
Anderson, S.R.   +7 more
core   +3 more sources

Data‐Driven Feedback Identifies Focused Ultrasound Exposure Regimens for Improved Nanotheranostic Targeting of the Brain

open access: yesAdvanced Science, Volume 13, Issue 13, 3 March 2026.
Machine learning models predict in real time the onset of harmful microbubble collapse during microbubble‐enhanced focused ultrasound (MB‐FUS) and enable dynamic adjustment of sonication to prevent cavitation‐induced damage. This predictive control expands the safe operating window for bloodbrain barrier opening, enhancing nanoparticle delivery and ...
Hohyun Lee   +17 more
wiley   +1 more source

Boosting Piezoelectric Voltage Constant in 3D‐Interconnected PZNNT Porous Piezoceramics via Pore Architecture Engineering

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT In conventional piezoceramics, the coordinated change between the dielectric constant (εr) and the piezoelectric charge constant (d33) usually limits the piezoelectric voltage constant g33 (g33 = d33/εr), a critical figure of merit for piezoelectric sensors.
Xiaoying Feng   +7 more
wiley   +1 more source

Iterative Sparse Covariance Matrix Fitting Direction of Arrival Estimation Method Based on Vector Hydrophone Array

open access: yesXibei Gongye Daxue Xuebao, 2020
Aiming at the direction of arrival (DOA) estimation of coherent signals in vector hydrophone array, an iterative sparse covariance matrix fitting algorithm is proposed.

doaj   +1 more source

Determination Of The Orientation Of Open Fractures From Hydrophone VSP [PDF]

open access: yes, 1995
Open fractures are of interest in many areas such as ground water contamination, hazardous waste disposal, oil and gas recovery, and geothermal energy extraction. In borehole geophysics and engineering, fractures are usually located by acoustic borehole
Lee, Jung Mo, Toksoz, M. Nafi
core  

Taming the degeneration of Bessel beams at anisotropic-isotropic interface: toward 3D control of confined vortical waves

open access: yes, 2015
Despite their self-reconstruction properties in heterogeneous media, Bessel beams are known to degenerate when they are refracted from an isotropic to an anisotropic medium.
Baudoin, Michael   +3 more
core   +3 more sources

Efficient use of space-time clustering for underwater acoustic communications [PDF]

open access: yes, 2018
Underwater acoustic (UWA) communication channels are characterized by the spreading of received signals in space (direction of arrival) and in time (delay). The spread is often limited to a small number of space-time clusters.
Li, Jianghui, Zakharov, Yuriy
core   +1 more source

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