Results 31 to 40 of about 456 (152)

Analysis of the anechoic properties of viscoelastic coatings with periodically distributed cavities

Acta Physica Sinica, 2007
Using an exact Mie scattering solution, the scattering and vibration mode of a single air sphere in unbounded rubber are analyzed with reference to the elements of the scattering matrix. Then, using the multiple_scattering method, the anechoic properties of the viscoelastic rubber coating (with a thickness of 8mm) containing a plane of periodically ...
null Zhao Hong-Gang, null Liu Yao-Zong, null Wen Ji-Hong, null Yu Dian-Long, null Wen Xi-Sen   +4 more
openaire   +1 more source

Analysis acoustic target strength of anechoic coatings in low frequency based on equivalent parameter inversion [PDF]

Vibroengineering Procedia, 2017
It’s generally different to predict the acoustic target strength of a submarine with anechoic coatings by conventional finite element method (FEM). Parameter inversion is a common method to solve this problem. Some researchers have studied the parameter inversion about normal incidence of anechoic coatings.
Zhihong Zou, Wei Li, Mingsheng Wang
openaire   +1 more source

Diagnosis and treatment of gastric abscess by endoscopic ultrasound: A mini‐review of the preliminary application

DEN Open, Volume 6, Issue 1, April 2026.
Abstract Gastric abscess is a rare condition caused by gastric barrier damage. It is easily misdiagnosed in clinical practice as a cancer recurrence or submucosal tumor, especially after surgery or endoscopic submucosal dissection. With a relatively high mortality rate, the cause and clinical characteristics of gastric abscesses are obscure.
Jia Xie, Mo‐Jin Wang, Rui Wang
wiley   +1 more source

A Pilot Study of a Synchronous Virtual Ultrasound Imaging Module for Physiotherapy Education

Physiotherapy Research International, Volume 31, Issue 2, April 2026.
ABSTRACT Background and Purpose This study examined the feasibility and preliminary educational impact of a single, synchronous virtual training module for developing ultrasound imaging (USI) knowledge and skills among physiotherapy students. Methods As part of a pilot study, first‐ and second‐year physiotherapy students from one institution, all ...
Nathan J. Savage, Keiocsha R. Barnes, Ashton M. Dobbins, Price L. Barrett   +3 more
wiley   +1 more source

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Journal of Marine Science and Application
Abstract The underwater anechoic coating technology, which considers pressure resistance and low-frequency broadband sound absorption, has become a research hotspot in underwater acoustics and has received wide attention to address the increasingly advanced low-frequency sonar detection technology and adapt to the working environment of ...
Xinyu Jia, Guoyong Jin, Tiangui Ye
openaire   +1 more source

Design and Fabrication of High Dielectric GRIN Lens for a Directive Antenna Using a Hybrid Filled Voxel Additive Manufacturing Technique

Advanced Materials Technologies, Volume 11, Issue 5, 6 March 2026.
Hybrid‐filled voxel AM enables integration of high‐permittivity materials into additively manufactured devices. Using this approach, a graded refractive index (GRIN) lens is demonstrated, achieving a 50% antenna size reduction with enhanced directivity.
Qianfang Zheng, Anna Radkovskaya, Kailun Xu, Ekaterina Shamonina, Patrick S. Grant   +4 more
wiley   +1 more source

Multifunctional Programmable Transmissive Metasurface with Phase and Amplitude Manipulation Capability

Advanced Science, Volume 13, Issue 13, 3 March 2026.
This work provides a multifunctional programmable transmissive metasurface with phase and amplitude manipulation capability in the sub‐6G band. By applying different coding strategies, the proposed metasurface can realize vortex beam generation, holographic imaging under phase coding mode, and multi‐beam forming in phase‐amplitude joint coding mode ...
Hao Tian Shi, Rui Yuan Wu, Shi He, Xue Yun Guo, Xiao Qing Chen, Yi Ning Zheng, Bing Bing Zhu, Lei Zhang, Tie Jun Cui   +8 more
wiley   +1 more source

Towards an active semi-anechoic room: simulations and first measurements

Acta Acustica
Semi-anechoic rooms are used for the acoustic characterisation of noise sources. They involve heavy infrastructures and thick absorbent lining. The aim of this work is to demonstrate a less expensive alternative by complementing a thin passive coating ...
Pinhède Cédric, Boulandet Romain, Friot Emmanuel, Allado Mark R., Côté Renaud, Herzog Philippe   +5 more
doaj   +1 more source

Analysis of Acoustic Target Strength for the Submarine with Alberich Anechoic Coating Effects

Journal of the Korean Society of Marine Environment and Safety, 2013
* Research Institute of Marine Systems Engineering, Seoul National University Seoul 151-742, Korea** Department of Naval Architecture and Ocean Engineering, Seoul National University Seoul 151-742, Korea *** Department Combatant Ships Project Team, Naval Ship Program, Defense Acquisition Program Administration Seoul 140-833, Korea **** Department of ...
Hyun-Wung Kwon, Suk-Yoon Hong, Hwa-Muk Kim, Jee-Hun Song   +3 more
openaire   +2 more sources

A Smart Magnetically Actuated Flip‐Disc Programmable Metasurface with Ultralow Power Consumption for Real‐Time Channel Control

Advanced Functional Materials, Volume 36, Issue 15, 19 February 2026.
The study proposes a 1‐bit programmable metasurface based on flip‐disc display, named flip‐disc metasurface (FD‐MTS). This new design enables ultralow energy consumption while maintaining coding patterns. It also exhibits high scalability and multifunctional flexibility.
Jiang Han Bao, Che Liu, Jia Cheng Li, Zhen Hao Fu, Yi Su Huang, Si Qi Huang, Lei Zhang, Jian Wei You, Tie Jun Cui   +8 more
wiley   +1 more source