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Unsupervised Learning of Particle Image Velocimetry
ISC Workshops, 2020Particle Image Velocimetry (PIV) is a classical flow estimation problem which is widely considered and utilised, especially as a diagnostic tool in experimental fluid dynamics and the remote sensing of environmental flows.
Mingrui Zhang, M. Piggott
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Obstetrics and Gynecology Clinics of North America, 2004
The introduction of new techniques for evaluating fetal status, particularly fetuses at theoretical risk for hypoxic ischemic encephalopathy, requires the most rigorous evaluation before widespread clinical deployment. The considerations extend beyond clinical value to the significant medicolegal implications of a failure to predict or ascertain ...
Laura, Detti +3 more
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The introduction of new techniques for evaluating fetal status, particularly fetuses at theoretical risk for hypoxic ischemic encephalopathy, requires the most rigorous evaluation before widespread clinical deployment. The considerations extend beyond clinical value to the significant medicolegal implications of a failure to predict or ascertain ...
Laura, Detti +3 more
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Seedless Velocimetry Measurements by Schlieren Image Velocimetry
AIAA Journal, 2011Schlieren optical systems have been used to perform velocity measurements in refractive turbulent flows using particle image velocimetry algorithms. This schlieren image velocimetry (schlieren "particle image velocimetry") technique makes use of naturally occurring refractive turbulent eddies in a flow as virtual "seed particles" upon which velocimetry
Michael J. Hargather +3 more
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Applied Optics, 1988
A new technique, digital image velocimetry, is proposed for measurement of instantaneous velocity fields of time dependent flows. A time sequence of single-exposure images of seed particles are captured with a high speed camera, and the sampled images are then digitized on an image processor, enhanced, and superposed to construct a multiple-exposure ...
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A new technique, digital image velocimetry, is proposed for measurement of instantaneous velocity fields of time dependent flows. A time sequence of single-exposure images of seed particles are captured with a high speed camera, and the sampled images are then digitized on an image processor, enhanced, and superposed to construct a multiple-exposure ...
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IEEE Transactions on Instrumentation and Measurement
Particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are important flow visualization technologies for measuring global velocity fields in a nonintrusive manner.
Shengze Cai, C. Gray, G. Karniadakis
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Particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are important flow visualization technologies for measuring global velocity fields in a nonintrusive manner.
Shengze Cai, C. Gray, G. Karniadakis
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Slug flow identification using ultrasound Doppler velocimetry
, 2020An identification method of slug flow using velocity information was developed in this study. Quantitative analysis of two-phase (gas–liquid) flow in horizontal pipes is essential to ensure the stability of, or to accurately estimate the thermal ...
Song Wang, Kewei Xu, Hyoung-Bum Kim
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Planar Doppler Velocimetry: Three-Component Velocimetry in Supersonic Jets
AIAA Journal, 1998A three-component planar Doppler velocimetry system was developed and used to make mean and instantaneous velocity measurements in a Mach 2 axisymmetric freejet. The mean measurements were in good agreement with reference laser Doppler velocimetry measurements taken in the same flowfield, whereas the instantaneous measurements were in fair agreement ...
Pamela Clancy +2 more
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Perceptual and Motor Skills, 1972
A velocimeter employing secondary emission photomultipliers has been described. A softball or other light colored object is detected against a black background under room ambient light conditions. The throwing field is triangular with a useable area of approximately 30 ft2.
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A velocimeter employing secondary emission photomultipliers has been described. A softball or other light colored object is detected against a black background under room ambient light conditions. The throwing field is triangular with a useable area of approximately 30 ft2.
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Doppler Velocimetry in Obstetrics
Obstetrics and Gynecology Clinics of North America, 1990Doppler ultrasound velocimetry offers a noninvasive method for assessing velocities in the various components of the fetal circulation including the cardiac, umbilical, cerebral, and aortic flows. As the volumetric flow measurement in these circumstances is prone to significant errors, the major approach has been to analyze the maximum frequency shift ...
D, Maulik, P, Yarlagadda, G, Downing
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Deep recurrent optical flow learning for particle image velocimetry data
Nature Machine Intelligence, 2021C. Lagemann +3 more
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