Results 91 to 100 of about 347,807 (287)
Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys
Advanced Engineering Materials, EarlyView.An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi +5 more
wiley +1 more source
Time-frequency localisation of defects using broadband pulsed arrays [PDF]
The spatial periodicity of an array of emitters with an alternating polarity structure is utilised to generate a wavefront with a range of interesting properties.
Hill, Samuel Joseph
core
Acoustic properties of aircraft wake vortices [PDF]
, 2008 The noise generation by aircraft wake vortices has been studied numerically and experimentally. The numerical study revealed a relation between the circulation Γ, the vortex core size rc and the frequency fa of the peak level in the vortex noise spectra,
Böhning, P., Michel, U., Baumann, R.
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Fundamentals of ultrasonic phased arrays
, 2014 This book describes in detail the physical and mathematical foundations of ultrasonic phased array measurements.?The book uses linear systems theory to develop a comprehensive model of the signals and images that can be formed with phased arrays ...
Lester W. Schmerr, Schmerr, Lester W
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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 +4 more
wiley +1 more source
The use of active mixed-mode S-parameters to analyze differentially fed phased arrays
AIP AdvancesThis paper proposes an improved theory of active mixed-mode S-parameters for analyzing and designing differentially fed phased arrays (DF-PAs). The active mixed-mode S-parameters characterize the reflection and conversion of differential and common modes
Yupeng Zheng, Shaoqiu Xiao
doaj +1 more source
Control of Levitating Particle in Ultrasound Field
MATEC Web of Conferences, 2018 The experimental setup for ultrasonic controlled levitation in the air has been developed. Two phased arrays made of 91 ultrasonic radiators placed in front of each other are used. Arrays are focused in the region of particle levitation.
Sukhanov Dmitry +6 more
doaj +1 more source
Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials
Advanced Engineering Materials, EarlyView.Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley +1 more source
Phased arrays for meteorological satellite [PDF]
, 1967 Phased arrays for meteorological ...
Profera, C. E., Jr.
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, 2015 [ES]El sistema PAMELA III, con sus correspondientes phased arrays, se diseñó para la detección de daños en aeronaves mediante la tecnología SHM (structural health monitoring).
Ruiz Alonso, Imanol
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