Results 1 to 10 of about 132,628 (222)

An Evaluation of Image Velocimetry Techniques under Low Flow Conditions and High Seeding Densities Using Unmanned Aerial Systems

open access: yesRemote Sensing, 2020
Image velocimetry has proven to be a promising technique for monitoring river flows using remotely operated platforms such as Unmanned Aerial Systems (UAS).
Sophie Pearce   +13 more
doaj   +2 more sources

Particle Imaging Velocimetry with Color-Encoded Illumination: A Review [PDF]

open access: yesSensors
High-resolution and three-dimensional measurements at large scales represent a crucial frontier in flow diagnostics. Color-encoded illumination particle imaging velocimetry has emerged as a promising non-contact volumetric measurement technique in recent
Yizhu Wang   +4 more
doaj   +2 more sources

On the Uncertainty of the Image Velocimetry Method Parameters

open access: yesHydrology, 2020
Image velocimetry is a popular remote sensing method mainly because of the very modest cost of the necessary equipment. However, image velocimetry methods employ parameters that require high expertise to select appropriate values in order to obtain ...
Evangelos Rozos   +4 more
doaj   +2 more sources

Particle Imaging Velocimetry Gyroscope [PDF]

open access: yesSensors, 2019
Inertial measurement units (IMUs) are typically classified as per the performance of the gyroscopes within each system. Consequently, it is critical for a system to have a low bias instability to have better performance.
Ahmed A. Youssef, Naser El-Sheimy
doaj   +3 more sources

Evaluation of Maternal Ophthalmic Artery Doppler Velocimetry at 18 to 24 Weeks of Gestational Age in the Prediction of Preeclampsia [PDF]

open access: yesIndian Journal of Radiology and Imaging
Amandeep Singh   +4 more
doaj   +2 more sources

Schlieren and BOS velocimetry of a round turbulent helium jet in air [PDF]

open access: yesOptics and lasers in engineering, 2022
Seedless velocimetry is gaining interest in many industrial and research applications. We report on a comparative study of time-resolved optical velocimetry using traditional, mirror-type knife-edge schlieren optics versus Background-Oriented Schlieren ...
G. Settles, Alexander Liberzon
semanticscholar   +1 more source

Particle Image Velocimetry for MATLAB: Accuracy and enhanced algorithms in PIVlab

open access: yesJournal of Open Research Software, 2021
PIVlab is a free toolbox and app for MATLAB ® . It is used to perform Particle Image Velocimetry (PIV) with image data: A light sheet illuminates particles that are suspended in a fluid.
W. Thielicke, René Sonntag
semanticscholar   +1 more source

ISUOG Practice Guidelines (updated): use of Doppler velocimetry in obstetrics

open access: yesUltrasound in Obstetrics and Gynecology, 2021
The International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) is a scientific organization that encourages sound clinical practice, teaching and research related to diagnostic imaging in women’s healthcare.
A. Bhide   +19 more
semanticscholar   +1 more source

FPGA-Based EO-PLL With Repetitive Control for Highly Linear Laser Frequency Tuning in FMCW LIDAR Applications

open access: yesIEEE Photonics Journal, 2022
We developed a digital electro-optical phase-locked-loop (EO-PLL) utilizing a repetitive control, allowing the use of very nonlinear tunable lasers for frequency-modulated continuous-wave (FMCW) light detection and ranging (LIDAR) applications.
Michael Hauser, Michael Hofbauer
doaj   +1 more source

Feasibility of Optical Flow Field Measurements of the Coolant in a Grinding Machine

open access: yesApplied Sciences, 2021
For industrial grinding processes, the workpiece cooling by metalworking fluids, which strongly influences the workpiece surface layer quality, is not yet fully understood.
Björn Espenhahn   +5 more
doaj   +1 more source

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