Results 91 to 100 of about 319,037 (305)

Underwater acoustic beacon signal extraction based on dislocation superimposed method

Advances in Mechanical Engineering, 2017
Flight data are recorded in an acoustic beacon. A new signal extraction method led by random decrement technique is proposed to detect sound signals from thousands of meters under the sea.
Zengmeng Zhang, Xing Cheng, Dayong Ning, Jiaoyi Hou, Yongjun Gong   +4 more
doaj   +1 more source

Turbofan aft duct suppressor study. Contractor's data report of mode probe signal data [PDF]

Acoustic modal distributions were measured in a fan test model having an annular exhaust duct for comparison with theoretically predicted acoustic suppression values. This report contains the amplitude and phase data of the acoustic signals sensed by the
Fiske, G. H., Joshi, M. C., Kraft, R. E., Motsinger, R. E., Syed, A. A.   +4 more
core   +1 more source

Optoelectronic Control of Redox Dynamics in POM Memristors for Noise‐Resilient Speech and Hardware‐Level Motion Recognition

Advanced Functional Materials, EarlyView.
Optoelectronic control of redox‐active polyoxometalate clusters in polymer matrices yields hybrid memristors with switchable volatile and non‐volatile modes, enabling reservoir‐type in‐sensor optical preprocessing and stable multilevel synapses for multimodal neuromorphic computing, including noise‐tolerant audiovisual keyword recognition and hardware ...
Xiangyu Ma, Ziyu Lv, Guohua Zhang, Zhongyue Xu, Yongbiao Zhai, Haiming Huang, Qiyan Zhang, Xiaojin Zhao, Yan Wang, Ye Zhou, Ziyu Xiong, Guanglong Ding, Wentao Xu, Su‐Ting Han   +13 more
wiley   +1 more source

Fault diagnosis of electrical faults of three-phasei nduction motors using acoustic analysis [PDF]

Bulletin of the Polish Academy of Sciences: Technical Sciences
Fault diagnosis techniques of electrical motors can prevent unplanned downtime and loss of money, production, and health. Various parts of the induction motor can be diagnosed: rotor, stator, rolling bearings, fan, insulation damage, and shaft.
Adam Glowacz, Maciej Sulowicz, Jarosław Kozik, Krzysztof Piech, Witold Glowacz, Zhixiong Li, Frantisek Brumercik, Miroslav Gutten, Daniel Korenciak, Anil Kumar, Guilherme Beraldi Lucas, Muhammad Irfan, Wahyu Caesarendra, Hui Lui   +13 more
doaj   +1 more source

Pulse analysis of acoustic emission signals [PDF]

A method for the signature analysis of pulses in the frequency domain and the time domain is presented. Fourier spectrum, Fourier transfer function, shock spectrum and shock spectrum ratio were examined in the frequency domain analysis and pulse shape ...
Houghton, J. R., Packman, P. F.
core   +1 more source

Power Laws, Precursors and Predictability During Failure

, 2004
We investigate the dynamics of a modified Burridge-Knopoff model by introducing a dissipative term to mimic the bursts of acoustic emission (AE) from rock samples.
Bufe C. G., Burridge R., G Ananthakrishna, Gutenberg B., Huang Y., Jensen H. J., Johansen A., Landau L. D., Lockner A., Main I., Mogi K., Rice J., Rumi De, Schmittbuhl J., Scholz C. H., Scholz C. H., Shaw B. E.   +16 more
core   +3 more sources

Revealing the Hidden Role of Cd in p‐Type Mg3Sb2: Enhanced Thermoelectric Performance by Grain Boundary Segregation Engineering

Advanced Functional Materials, EarlyView.
The hidden role of Cd segregation at grain boundaries is revealed in p‐type Mg3Sb2 by atom probe tomography and other advanced characterizations. Grain boundary Cd enrichment suppresses the SbMg+ hole‐killer formation and lowers potential barriers, enhancing electrical conductivity.
Zhou Li, Deming Dong, Xiaoyu Yang, Jun Qian, Mengruizhe Kong, Han Wan, Ni Ma, Wei Bai, Pengfei Nan, Binghui Ge, Jiming Song, G. Jeffrey Snyder, Yuan Yu   +12 more
wiley   +1 more source

Performance evaluation of deep learning approaches for fault diagnosis of rotational mechanical systems using vibration, sound, and acoustic emission signals

Journal of Low Frequency Noise, Vibration and Active Control
The present study emphasizes an optimized deep learning algorithm for gearbox fault detection using vibration, sound, and acoustic emission signals. Statistical and acoustic features are extracted from these signals, and various neural network algorithms
T Praveen Kumar, R Buvaanesh, M Saimurugan, G Naresh, Solomon Jenoris Muthiya, Murgayya Basavanakattimath   +5 more
doaj   +1 more source

Destruction of composite material by shear load and formation of acoustic radiation

Aviation, 2012
Some models of the formation of acoustic emission signals by the destruction of composite material by shear load were examined. We have formulated a mathematical description of the quantity of elements that remains in the process of composite destruction
Sergey Filonenko, Viktor Kalita, Alexandr Kosmach   +2 more
doaj   +1 more source

Bioprinting Organs—Science or Fiction?—A Review From Students to Students

Advanced Healthcare Materials, EarlyView.
Bioprinting artificial organs has the potential to revolutionize the medical field. This is a comprehensive review of the bioprinting workflow delving into the latest advancements in bioinks, materials and bioprinting techniques, exploring the critical stages of tissue maturation and functionality.
Nicoletta Murenu, Camilla Mussoni, Mateo S. Andrade Mier, Paula Buettner, Nathaly Chicaiza‐Cabezas, Yi‐Yu Robin Dai, Jessica Faber, Maren Fiedler, Zan Lamberger, Xuen Jen Ng, Vanessa Moessler, Anna Rederer, Jonas Roeder, Sabrina Stecher, Katinka Theis, Jeanette Weigelt, Silvia Budday, Gregor Lang, Natascha Schaefer   +18 more
wiley   +1 more source