Results 151 to 160 of about 1,129,305 (370)
Ultra‐High Sensitivity, Wide‐Range Thermometry Based on High‐Quality Microscale Diamond Resonators
Advanced Materials, EarlyView.By combing high‐crystal quality single‐crystal diamond MEMS cantilevers with multi‐mode resonance, the groundbreaking microscale ultra‐high sensitivity ≈22 nK Hz⁻¹/2 and resolution of 100 µK thermometry is achieved. The diamond MEMS thermometry can operate over a wide temperature range from 6.5 to 380 K. This work underscores diamond MEMS resonators as
Wen Zhao +5 more
wiley +1 more source
NUMERICAL ANALYSIS OF NON-REFLECTION BOUNDARY SIMULATION METHOD FOR RADIATION ACOUSTIC FIELD
Jixie qiangdu, 2019 Boundary condition is an important issue in acoustic calculations, and free acoustic field is often simulated by non-reflection boundary in acoustic calculations.
LI LiJun, LIU YiRan, SUN FengShan
doaj
Impedance measurement using a two-microphone, random-excitation method [PDF]
The feasibility of using a two-microphone, random-excitation technique for the measurement of acoustic impedance was studied. Equations were developed, including the effect of mean flow, which show that acoustic impedance is related to the pressure ratio
Parrott, T. L., Seybert, A. F.
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Advanced Materials, EarlyView.A schematic illustration of how noble metals can be used to create nanoparticles (NPs) or nanoclusters (NCs). Noble metal NPs, due to their plasmonic properties, enable photothermal therapy and surface‐enhanced Raman scattering (SERS). In contrast, NCs, which lack a plasmonic resonance band, exhibit fluorescence, making them ideal for bioimaging ...
David Esporrín‐Ubieto +3 more
wiley +1 more source
Journal of Low Frequency Noise, Vibration and Active ControlAs an important component of inlet and exhaust mufflers, the acoustic characteristics of perforated components are inevitably affected by the flow of air. Therefore, obtaining the acoustic impedance of the perforated element under airflow conditions is a
Huabing Wen +3 more
doaj +1 more source
Impedance Tube Used as a Source of Known Acoustic Power [PDF]
, 1967 William A. Jack
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Optimum wall impedance for spinning modes: A correlation with mode cut-off ratio [PDF]
A correlating equation relating the optimum acoustic impedance for the wall lining of a circular duct to the acoustic mode cut-off ratio, is presented.
Rice, E. J.
core +1 more source
Aramid Nanofiber Aerogels: Preparation, Modification, Composite Fabrication, and Applications
Advanced Materials, EarlyView.Different forms of aramid nanofibers (ANFs) and especially aerogels from them, offer a sustainable route to high‐performance biomimetic nanocomposites. Due to the cartilage‐like architecture, ANF‐based materials enable breakthroughs in energy, electromagnetic, biomedical, and water purification technologies.
Mingqiang Wang +9 more
wiley +1 more source
Fluid mechanical model of the acoustic impedance of small orifices [PDF]
, 1975 A. S. Hersh, T. A. Rogers
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Skeletal High‐Strength Nanoporous Copper and Metamaterials: The Hakka Tulou Design Heritage
Advanced Materials, EarlyView.Inspired by the Hakka Tulou walls, skeletal nanoporous copper is fabricated via a two‐phase MnCu precursor and controlled dealloying. This strategy achieves high strength (200 MPa) and large specific surface area (27.6 m2/g), and extends to lattice metamaterials with hierarchical porosity, offering new design pathways for multifunctional metal ...
Haozhang Zhong +8 more
wiley +1 more source