Yiying Wang |  Tingting Ren... -  《Fourth International Conference on Advanced Manufacturing Technology and Electronic Information (AMTEI 2024)》 -  International Conference on Advanced Manufacturing Technology and Electronic Information - 2025, - 135150D.1～135150D.6 - 共6页

摘要： wireless ultrasonic Doppler fetal heart rate detection |  existing ultrasonic Doppler fetal heart rate detectors |  rate and analog demodulation to obtain Doppler |  system. The system adopts digital technology based on |  detection system and key circuits composed of wireless

关键词： Ultrasonic doppler detection technology |  Fetal heart rate |  Quadrature demodulation technology |  Fetal heart rate measurement

Yaohong Wang |  Kangkang Song... -  《Fourth International Conference on Testing Technology and Automation Engineering (TTAE 2024)》 -  International Conference on Testing Technology and Automation Engineering - 2024, - 1343907.1～1343907.6 - 共6页

摘要： Doppler fetal heart detection system. An ultrasonic |  probe based on pulse detection technology was designed | . A pulse ultrasonic detection signal transformation |  Source of Ultrasonic Doppler Foetal Meters, and its | This article presents a pulse-type ultrasonic

关键词： Pulse-type ultrasonic doppler fetal heart detection technology |  Fetal heart detection |  Fetal heart rate |  Calibration

Chen, Yuan |  Wang, Zhongyang... -  《Journal of electronic packaging: Transactions of the ASME》 - 2024,146(3) - 030801～ - 共13页

摘要：-electronics market, non-destructive testing (NDT) technology |  has been widely applied to defect detection and |  detection and identification of advanced complicated |  microscopy (AFM), laser Doppler vibration measuring | , called hybrid ultrasonic-laser digital holographic

关键词： micro-electronic packaging |  defect inspection |  non-destructive testing methods |  ultrasonic-laser DHM imaging inspection |  CHIP SOLDER BUMPS |  SCANNING ACOUSTIC MICROSCOPY |  TIME-DOMAIN REFLECTOMETRY |  INTELLIGENT DIAGNOSIS |  SQUID MICROSCOPY |  MECHANICAL-PROPERTIES...

Wang, Juan |  Zhang, Fan... -  《Technology and health care: official journal of the European Society for Engineering and Medicine》 - 2024,32(5) - 2951～2964 - 共14页

摘要： elastography (RT-SWE) technology to quantify Young's modulus |  in the early detection of renal fibrosis in CKD |  ultrasonic diagnostic instrument. Renal RT-SWE elastography |  color Doppler ultrasonography. The study used RT-SWE |  technology to assess the mean Young's modulus of the cortex

关键词： Shear wave elastography |  chronic kidney disease |  renal fibrosis |  early renal injury

Joshua D. Eckels |  Isabel F. Fernandez... -  《Rotating Machinery, Optical Methods & Scanning LDV Methods: Proceedings of the 39th IMAC, A Conference and Exposition on Structural Dynamics 2021, v.6》 -  IMAC Conference and Exposition on Structural Dynamics - 2022, - 167～181 - 共15页

摘要： speed and accuracy of automatic flaw detection |  technique that utilizes steady-state ultrasonic excitation |  and laser Doppler vibrometer (LDV) measurements to |  traditional time-of-flight ultrasonic NDE techniques | . However, current AWS technology is limited when applied

关键词： Convolutional neural network |  Nondestructive evaluation |  Structural health monitoring |  Ultrasonic wavefield measurements |  Acoustic wavenumber spectroscopy

NSTL主题词： Defect characterization |  Neural network |  Ultrasonics

Dai L.-N. |  Ni C.-Y.... -  《Optics & Laser Technology》 - 2022,156 - 共5页

摘要：-domain synthetic aperture focusing technology (F-SAFT |  for laser ultrasonic testing (LUT) to detect and |  excitation and detection commonly used in LUT. Bulk | -shaped laser source and are detected by a laser Doppler |  accurately with separated excitation and detection.

关键词： Defect imaging and location |  Frequency domain synthetic aperture focusing technology (F-SAFT) |  Laser Ultrasonic (LU) |  Non-destructive testing

Yan, Zhiheng |  Xu, Xiaoyan... -  《World neurosurgery》 - 2021,149 - 380～387 - 共8页

摘要：This paper discusses the clinical value of |  standardized early pregnancy ultrasound structure screening |  in the diagnosis of fetal central nervous system |  (CNS) malformations. In this paper, 6902 cases (8336 |  fetuses) of 1113 + 6 weeks of gestation (5468 cases of

关键词： Congenital malformations |  Fetus |  Nervous system malformations |  Prenatal |  Ultrasonography |  Wavelet threshold denoising algorithm

Shuang Liang |  Wen-yong Sun... -  《Proceedings of the International Field Exploration and Development Conference 2019, Set 2》 -  International Field Exploration and Development Conference - 2020, - 1674～1682 - 共9页

摘要：A non-contact ultrasonic Doppler system,whose |  facility with ultrasonic Doppler was built,simulating the |  ultrasonic Doppler by changing the velocity of fluid under |  distortion of ultrasonic Doppler to gas kick in early |  kick to graph ultrasonic Doppler signal with gas

关键词： Ultrasonic Doppler |  Gas kick |  Detection |  Signal distortion

NSTL主题词： Doppler Ultrasonography |  Signal distortion |  Humping

Steven Africk -  《TechConnect Briefs 2019: technical proceedings of the 21st TechConnect World Innovation Conference & Expo : 17-19 June 2019, Boston, MA》 -  TechConnect World Innovation Conference & Expo - 2019, - 33～36 - 共4页

摘要：USPD is a unique ultrasonic backscatter |  technology for the characterization of |  energy is received at Doppler-shifted frequencies | ,allowing clutter-free detection of backscatter from |  nanoparticles.Particles are interrogated in motion and the backscattered

关键词： particle characterization |  particle size distribution |  ultrasonic backscatter

NSTL主题词： Pulses |  Ultrasonics |  Nanoparticles |  Novels

Huan Gao |  Chao Tan... -  《2018 37th Chinese Control Conference: 37th Chinese Control Conference (CCC), 25-27 July 2018, Wuhan, China》 -  Chinese Control Conference - 2018, - 4056～4060 - 共5页

摘要： ultrasonic Doppler technology has attracted much attention |  in the field of multiphase flow detection recently |  the measurement line. A pulse Doppler measurement | The overall superficial velocity is a main |  parameter in oil-water two-phase flow in petroleum

关键词： Zirconium |  Fluid flow measurement |  Fluids |  Thermal engineering |  Instruments |  Velocity measurement |  Nuclear measurements

NSTL主题词： horizontal pipe |  Doppler Ultrasonography |  VELOCITY PROFILING |  OIL-IN-WATER |  TWO PHASE FLOW