Results 51 to 60 of about 225,239 (334)
The Use of Multi-beam Sonars to Image Bubbly Ship Wakes [PDF]
, 2005 During the past five years, researchers at Penn State University (PSU) have used upward-looking multi-beam (MB) sonar to image the bubbly wakes of surface ships.
Bradley, David L +2 more
core +1 more source
Advanced Robotics Research, EarlyView.Combining a biomimetic soft‐robot with deep‐learning data analytics sheds light on a unique peripheral dynamics seen in the biosonar system of bats: Bats modulate their ultrasonic biosonar signals upon emission as well as reception with variable, yet highly coordinated motion patterns of their noseleaves and pinnae.
Shuxin Zhang +4 more
wiley +1 more source
Matched cross‐spectrum phase processing for source depth estimation in deep water
IET Radar, Sonar & NavigationZhou et al. (2022) proposed a method for instantaneous source depth estimation in deep water using matched beam intensity processing (MBIP) that leverages depth‐related oscillatory features arising from Lloyd's mirror interference in the frequency domain
Lisheng Zhou +4 more
doaj +1 more source
Simulated Research on Passive Sonar Range Using Different Hydrographic Conditions
MATEC Web of Conferences, 2015 As an example using the passive sonar, it calculated the quality factor of passive sonar using the sonar equation. The sound field was calculated under different depth and range using multiform hydrographic conditions.
Han Jing +3 more
doaj +1 more source
Sensors, 2019 Auto-detecting a submerged human body underwater is very challenging with the absolute necessity to a diver or a submersible. For the vision sensor, the water turbidity and limited light condition make it difficult to take clear images.
Huu-Thu Nguyen, Eon-Ho Lee, Sejin Lee
doaj +1 more source
Urban-industrial seascapes can be abundant and dynamic fish habitat
Frontiers in Marine Science, 2023 Urban-industrial seascapes are prevalent around the world, yet we lack a basic understanding of how the mosaic of different habitats in these areas are used by mobile marine fauna, including features such as industrial ports and marinas.
Michael Bradley +5 more
doaj +1 more source
Balancing SoNaR: IPR versus Processing Issues in a 500-Million-Word Written Dutch Reference Corpus [PDF]
, 2010 In The Low Countries, a major reference corpus for written Dutch is beingbuilt. We discuss the interplay between data acquisition and data processingduring the creation of the SoNaR Corpus. Based on developments in traditionalcorpus compiling and new web
De Clercq, Orph´ee +4 more
core +4 more sources
Dolphin-inspired target detection for sonar and radar
, 2014 Gas bubbles in the ocean are produced by breaking waves, rainfall, methane seeps, exsolution, and a range of biological processes including decomposition, photosynthesis, respiration and digestion.
Leighton, T.G., White, P.R.
core +1 more source
Impact of Biomimetic Pinna Shape Variation on Clutter Echoes: A Machine Learning Approach
Advanced Intelligent Systems, EarlyView.Bats with dynamic ear structures navigate dense, echo‐rich environments, yet the echoes they receive are highly random. This study shows that machine learning can reliably detect structural signatures in these seemingly chaotic biosonar signals. The results open new directions for biologically inspired sensing, where time‐varying receiver shapes ...
Ibrahim Eshera +2 more
wiley +1 more source
Inference of Bubble Size Distribution in Sediments Based on Sounding by Chirp Signals
Archives of AcousticsA method is proposed to estimate the bubble void fraction and bubble size distribution in marine sediments based on measured sound speed and attenuation data in gas-bearing sediments.
Xiaohong YANG +4 more
doaj +1 more source