Results 31 to 40 of about 6,322,023 (276)

Investigation into a prominent 38 kHz scattering layer in the North Sea [PDF]

, 2008
The aim of this study was to investigate the composition of an acoustic scattering layer in the North Sea that is particularly strong at 38 kHz. A full definition of the biological composition of the layer, along with its acoustic properties, would allow
Mair, Angus MacDonald
core   +2 more sources

Acoustic Scattering Characteristics of Underwater Eight-grid Air-filled Cavity Corner Reflector

水下无人系统学报, 2022
Underwater corner reflectors have a strong acoustic scattering ability and can be used to mark underwater structures and simulate underwater false targets. In accordance with the limitation of the reflection range of a single-grid corner reflector, a new
Zi-chao CHU, Yi LUO, Wu-di WEN
doaj   +1 more source

Formation of Scattering Characteristics for Acoustical Ray Tracing Simulation

Archives of Acoustics, 2018
Ray tracing simulation of sound field in rooms is a common tool in room acoustic design for predicting impulse response. There are numerous commercial engineering tools utilising ray tracing simulation. A specific problem in the simulation is the modelling of diffuse reflections when contribution of individual surface is prevailing.
Srđan BOJIČIĆ, Dragana ŠUMARAC-PAVLOVIĆ, Miomir MIJIĆ   +2 more
openaire   +2 more sources

Investigation and Analysis of Acoustojets by Spectral Element Method

Mathematics, 2022
In this study, acoustic wave scattering in a homogeneous media by an obstacle is examined in the case of plane wave excitation and the formation of acoustic jets is explored.
Ibrahim Mahariq, Ibrahim H. Giden, Shadi Alboon, Wael Hosny Fouad Aly, Ahmed Youssef, Hamza Kurt   +5 more
doaj   +1 more source

Analysis on Acoustic Scattering Characteristics of Icosahedral Composite Quasi-Spherical Scatterer

水下无人系统学报
To address the difficulties in deployment and insufficient acoustic adaptability of traditional underwater acoustic standard targets, a lightweight quasi-spherical scatterer with icosahedral buoy-rod composite structure was proposed. Curved buoyant units
Yanhua DONG, Fulin ZHOU, Jun FAN, Bin WANG, Wenhuan WANG, Jianbing XIONG   +5 more
doaj   +1 more source

Mobility of a two-dimensional electron gas in the AlGaAs/GaAs heterostructure: simulation and analysis [PDF]

ITM Web of Conferences, 2019
At temperatures above 100 K, a two-dimensional electron gas generated at the AlGaAs/GaAs heterointerface can be characterized by the three dominant scattering mechanisms: acoustic deformation potential, polar acoustic phonon and polar optical phonon.
Volcheck Vladislav, Stempitsky Viktor
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

OntOMat: Toward Ontology‐Based Product and Process Design Engineering and Optimization Solutions Fueling Circular Value Chains

Advanced Engineering Materials, EarlyView.
The OntOMat ontology establishes a structured framework for polymer matrix fiber reinforced composite materials, integrating manufacturing processes, characterization methods, and multiscale design through the VDI/VDE 3682 formalized process description standard.
Nicolas Christ, Jörg Hohe, Martin Kördel, Michael Giese, Niklas Toffert, Christian Seidel, Olaf Rehme, Patrik Schneider, Oliver Focke, Elie Abi Aoun, Claas Falldorf, Beñat Gutierrez, Alexandra Kühn, Sven Torstrick-von der Lieth, Christoph Herden, Erik Johannsen, Jan‐Uwe R. Schmidt, Felix Winkelmann, Andreas Schott, Daniel Schott   +19 more
wiley   +1 more source

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

Advanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami, Hengzhe Ren, Erqian Dong, Ashkan Ghanbarzadeh‐Dagheyan, Chen Shen   +4 more
wiley   +1 more source

Research on Calculation Method for Acoustic Scattering of Helicopter Noise

Xibei Gongye Daxue Xuebao, 2020
A new calculation method of helicopter rotor/fuselage acoustic scattering is developed. Firstly, a CFD analysis model is developed to simulate flow field of the rotor, which is based on the motional embedded grid system and RANS equations, and provides ...

doaj   +1 more source