Results 71 to 80 of about 9,260,103 (204)

Supersonic acoustic intensity with statistically optimized near-field acoustic holography [PDF]

, 2011
The concept of supersonic acoustic intensity was introduced some years ago for estimating the fraction of the flow of energy radiated by a source that propagates to the far field.
Fernandez Grande, Efren, Jacobsen, Finn
core  

Engineered Optical Fibers for Deep‐Tissue Applications

Advanced Optical Materials, Volume 14, Issue 10, 13 March 2026.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li, Siyang Zheng, Wenzhao Li, Kai Chen, Tianting Zhong, Chi Man Woo, Weiran Pang, Chuqi Yuan, Xiaozhou Xiao, Xianguang Yang, Long Jin, Xiang Qian, Qiyao Tan, Changyuan Yu, Liwei Liu, Junle Qu, Puxiang Lai   +16 more
wiley   +1 more source

Research Progress on Aerodynamic Noise in Turbomachinery

Nanjing Hangkong Hangtian Daxue Xuebao
In the context of advancing energy transition and the demand for environmentally friendly technologies， aerodynamic noise has emerged as a critical constraint on the efficient operation and broader application of turbomachinery.
LI Wen, WEI Zonghao, CHEN Zebing, GUAN Yin, ZHU Yangli, WANG Xing, CHEN Haisheng, ZHU Junqiang, QIN Wei   +8 more
doaj   +1 more source

Magneto‐X Effects in Magnetic Soft Materials and Their Applications

Advanced Science, Volume 13, Issue 18, 27 March 2026.
This review systematically explores magnetic soft materials (MSMs), a novel class of composites that transform under magnetic fields. It catalogs fundamental “Magneto‐X” effects, classifies materials by their matrix and magnetic fillers, and highlights transformative applications in soft robotics, biomedical devices, flexible electronics, etc. Finally,
Ziyin Xiang, Xiangling Xia, Benjamin Ducharne, Yujie Ye, Jie Shang, Run‐Wei Li   +5 more
wiley   +1 more source

Phase Hologram by Acoustic Metasurfaces

Small Structures, Volume 7, Issue 3, March 2026.
This work has achieved a breakthrough in holographic communication, realizing phase holographic imaging. The proposed phase holographic concept overcomes the limitations of traditional amplitude holographic energy attenuation. The design of its amplitude compensation method further addresses the key challenge of phase holographic imaging clarity ...
Xiao Guo, Haohan Zeng, Xinghao Hu, Youyu Mo, Xinzong Wang, Xiao Liang, Yusen Wu, Tingting Li, Haiyan Fan, Yifan Zhu, Hui Zhang, Badreddine Assouar   +11 more
wiley   +1 more source

Half-Space Sound Field Reconstruction Based on the Combination of the Helmholtz Equation Least-Squares Method and Equivalent Source Method

Sensors
In practical conditions, near-field acoustic holography (NAH) requires the measurement environment to be a free sound field. If vibrating objects are located above the reflective ground, the sound field becomes non-free in the presence of a reflecting ...
Laixu Jiang, Yingqi Xi, Yingying Hu, Guo Wang, Jingqiao Liu   +4 more
doaj   +1 more source

Research on the Planar Near-Field Acoustic Holography for Cyclostationary Sound Field

, 2011
The conventional planar near-field acoustic holography is not suitable for cyclostationary sound field radiated by the rotating machines. When the cyclic spectral density (CSD), instead of the complex sound pressure, is adopted as reconstructed physical ...
Rong Fu Mao, Zhi Min Chen, Hai Chao Zhu
core   +1 more source

High-resolution digital holography utilized by the subpixel sampling method [PDF]

, 2011
A novel (to our knowledge) approach for resolution improvement in digital holography is presented in this paper. The proposed method is based on recording the incoming interference field on a complementary metal-oxide semiconductor (CMOS) camera with ...
Fritzsche, Marco, Bryanston-Cross, P., Timmerman, B. H. (Brenda H.), Peter Bryanston-Cross, Claus, Daniel, Daniel Claus, Daciana Iliescu, Brenda Timmerman, Iliescu, Daciana, Marco Fritzsche   +9 more
core   +1 more source

Robust reconstruction of equivalent source method based near-field acoustic holography using an alternative regularization parameter determination approach.

Journal of the Acoustical Society of America, 2019
The core of equivalent source method based near-field acoustic holography is to solve the equivalent source strength with the measured pressure and the transfer matrix, which is a typical ill-posed inverse problem.
Dayi Tan, Zhi-Gang Chu, Guijiao Wu
semanticscholar   +1 more source

Data extrapolation method for near-field acoustic holography

Journal of the Acoustical Society of Japan (E), 1998
We propose a new data smoothing method for near-field acoustic holography (NAH) with the aid of the data extrapolation. This method can reduce the error energy which comes from the finiteness of the measurement aperture. We illustrate our calculational results by using of the computer simulations which apply to the numerically generated data by Fast ...
openaire   +2 more sources