Results 11 to 20 of about 105,270 (315)
A Wavelet Packet Transform and Convolutional Neural Network Method Based Ultrasonic Detection Signals Recognition of Concrete [PDF]
Sensors, 2022 This paper proposes a new intelligent recognition method for concrete ultrasonic detection based on wavelet packet transform and a convolutional neural network (CNN).
Jinhui Zhao, Tianyu Hu, Qichun Zhang
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Microfiber Interferometric Sensor for Ultrasound Detection [PDF]
SensorsBy setting up ultrasonic fields in solid and liquid environments, the propagation characteristics of ultrasonic waves were investigated, and a sensing experiment device with related physical field settings was constructed. A comparison of results between
Xiuxin Wang +5 more
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Ultrasonic Detection of Choledocholithiasis [PDF]
Nature, 1961 PRESENT-DAY methods of detecting gall-stones in the common bile duct at operation are not wholly satisfactory. Stones may be missed in spite of careful palpation, cholangiography and direct exploration of the common bile duct. An attempt has been made to use pulsed ultrasound at the time of operation as an adjunct to their detection.
M J, HILL, I, McCOLL
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Sensors, 2021 In this paper, we propose a theoretical framework to explain how the transparent elastic grating structure can be employed to enhance the mechanical and optical properties for ultrasonic detection.
Chayanisa Sukkasem +3 more
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A novel detector based on EM algorithm for multiple-mode OFDM with index modulation
EURASIP Journal on Wireless Communications and Networking, 2020 Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) is a promising multiple-carrier modulation technique, which activates all OFDM subcarriers to transmit multiple distinguishable modes (or signal constellations ...
Hua Qing +4 more
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Energies, 2021 The detection of acoustic emissions with multiple channels and different kinds of sensors (external ultrasound electronic sensors and internal optical fiber sensors) for monitoring power transformers is presented.
Iago Búa-Núñez +2 more
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Research on Rail Flaw Echo Accurate Location Method Based on Interface Wave Tracking Technology
Kongzhi Yu Xinxi Jishu, 2023 In the calculation of rail flaw echo location, the rail flaw location is related to the ultrasonic propagation time in rail. The more accurate the extracted propagation time, the more accurate the rail flaw location calculation.
XIA Lang +3 more
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Measurement Science Review, 2023 The influence of the wavelength difference between the laser source and the phase-shifted fiber Bragg grating (PS-FBG) on the intensity of the power demodulation system based on an adjustable laser source was studied experimentally, and the optimum of ...
Meng Lijun, Tan Xin, Yu Quanquan
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The ultrasonic detection of an isolated craniosynostosis [PDF]
Prenatal Diagnosis, 1995 AbstractThe prenatal detection of scaphocephaly, an isolated form of craniosynostosis, is presented. The diagnosis was made at 34 weeks of gestation in a woman with polyhydramnios. The ultrasound appearance and postnatal follow‐up are presented.
L I, van der Ham +3 more
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Applied Sciences, 2020 Insulation defects that occur in gas-insulated switchgear (GIS), which is one of the most important types of equipment in the power grid, can lead to serious accidents.
Weijia Yao +4 more
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