Results 71 to 80 of about 183,094 (279)

Performance and influencing factors of acoustic grating based on signal enhancement

Xibei Gongye Daxue Xuebao
In the acoustic signal receiving section of underwater vehicle, an effective measure to improve surface acoustic impedance and reduce signal attenuation is to cover acoustic barrier plate of hydrophone array with high impedance material (signal ...
YANG Lei, CHEN Kean, LYU Ning, TIAN Fenghua, ZHANG Jiyang, LIU Yidong   +5 more
doaj   +1 more source

Wavelength-scale gas-filled cuboid acoustic lens with diffraction limited focusing

Results in Physics, 2019
Per the laws of geometrical optics, a plane-parallel medium does not possess focusing properties. However, in this paper, we demonstrate for the first time that an acoustic cuboid particle filled with CO2 is able to focus sound despite its flat surface ...
Constanza Rubio, Daniel Tarrazó-Serrano, Oleg V. Minin, Antonio Uris, Igor V. Minin   +4 more
doaj   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Acoustooptic in-fiber modulator using acoustic focusing [PDF]

IEEE Photonics Technology Letters, 1993
A new efficient in-fiber acoustooptic phase modulator is demonstrated in which the acoustic wave is focused onto the fiber by reflection from a cylindrical surface. The device exhibits a phase modulation of 2.63 rad at a light wavelength of 1550 nm, using an RF frequency of 86 MHz and power of 1 W. >
Abdulhalim, I., Pannell, C.N.
openaire   +3 more sources

Direct Visualization of Laser-Driven Focusing Shock Waves

, 2011
Cylindrically or spherically focusing shock waves have been of keen interest for the past several decades. In addition to fundamental study of materials under extreme conditions, cavitation, and sonoluminescence, focusing shock waves enable myriad ...
A. V. Lukashev, D. Veysset, G. Saini, K. G. Guderley, K. P. Stanyukovich, Keith A. Nelson, P. Fidkowski, R. Radovitzky, S. Kooi, T. Pezeril, V. K. Kedrinskii, W. C. Davis   +11 more
core   +1 more source

Bioinspired Shape‐Memory Hook Fasteners With Programmable Interlocking and Silent Release

Advanced Engineering Materials, EarlyView.
Bioinspired hook fasteners made from epoxy shape‐memory polymers are shown to switch between strong, secure attachment and gentle, silent release when heated. By combining programmable geometry and material response, these adaptive fasteners outperform commercial systems in strength and noise control, enabling new solutions for robotics, medical ...
Maria I. Vallejo Ciro, Manuel J. Carvajal Loaiza, Rahaf Homssi, Vanessa Restrepo   +3 more
wiley   +1 more source

Acoustic focusing effect of composite metamaterial column in air

Journal of Measurement Science and Instrumentation, 2017
The acoustic focusing effect of metamaterial has a wide range of applications in medicine,acoustic imaging,signal detection,etc.This paper presents an acoustic metamaterial applied to the acoustic focusing effect.The formation of acoustic metamaterial is
HAN Jian-ning, ZHEN Wen-xiang, QIN Jia-jie, WU Yu-peng, TANG Shuai, Key Laboratory of Instrumental Science & Dynamic Measurement   +5 more
doaj  

Acoustic Transmission Characteristics Based on H-Type Metamaterials

IEEE Access, 2019
To achieve the artificial manipulation of the acoustic wave front, and to produce high-efficiency acoustic focusing effect, this paper designed an $H$ -type locally resonant metamaterial structure based on a two-dimensional three-component local ...
Shuai Tang, Jianning Han
doaj   +1 more source

Acoustoelectric conversion and deep-subwavelength acoustic focusing based on Fresnel zone plates

AIP Advances, 2023
Fresnel zone plates (FZP) with quasi-planar structure and ultrathin thickness are capable of focusing light or acoustic waves efficiently. In this paper, we employ the FZP to manipulate the wave fields and suggest two acoustic functionalities.
Xue-ying Gao, Xiao-bin Cui, Yong Zhang, Jie-jun Zhu, Cheng-ping Huang   +4 more
doaj   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

Advanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana, Indra Apsite, Leonid Ionov   +2 more
wiley   +1 more source