Results 1 to 10 of about 13,142 (151)

Feature Tracking Velocimetry Applied to Airborne Measurement Data from Murg Creek

E3S Web of Conferences, 2018
A new image feature tracking velocimetry is presented and tested on airborne video data available from a previous study at Murg Creek (Canton Thurgau, Switzerland). Here, the seeded flow scenery had been recorded by an off-the-shelf action camera mounted
Cao Liekai, Weitbrecht Volker, Li Danxun, Detert Martin   +3 more
doaj   +1 more source

Optimal velocity estimation model based on non-differential Doppler observations from BDS-3 satellites

Dianxin kexue, 2021
An optimized velocimetric model based on non-differential Doppler observations from BDS-3 satellites with high accuracy and low model complexity was proposed to address insufficient accuracy and low efficiency of velocity estimation method.The ...
Zejie WANG, Qianxin WANG, Tianwen SHANG
doaj   +2 more sources

Stereo Thermal Marking Velocimetry

Frontiers in Mechanical Engineering, 2018
This paper presents a novel approach to measuring and mapping shape and motion of the water surface. The approach combines and borrows from existing techniques, such as stereo imaging shape recognition and tracking, infrared (IR) laser marking and ...
Ivan Savelyev, Julian Fuchs
doaj   +1 more source

Upconversion Photonic Doppler Velocimetry Based on Stimulated Brillouin Scattering

Photonics
Optical up-conversion photonic Doppler velocimetry (PDV) based on stimulated Brillouin Scattering (SBS) with an all-fiber link structure is proposed in this article. Because SBS limits the laser power transmitted by a fiber over long distances, the probe
Long Chen, Cangli Liu, Heli Ma, Longhuang Tang, Xing Jia, Tianjiong Tao, Shenggang Liu, Yongchao Chen, Xiang Wang, Jian Wu, Chengjun Li, Jidong Weng   +11 more
doaj   +1 more source

Particle Imaging Velocimetry with Color-Encoded Illumination: A Review

Sensors
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, Xiaoming He, Yuan Tian, Chang Liu, Depeng Wang   +4 more
doaj   +1 more source

An Optical Flow Algorithm with Automatic Parameter Adjustment for Fluid Velocimetry

Journal of Open Research Software
Particle image velocimetry is a standard non-intrusive experimental fluid mechanics technique that is used for determining fluid flow velocities quantitatively.
Gauresh Raj Jassal, William Thielicke, Bryan E. Schmidt   +2 more
doaj   +1 more source

X-Ray imaging method for in-situ study of particle-laden flows

e-Journal of Nondestructive Testing
 The accurate measurement of flow parameters often depends on sensor accessibility. Optical flow assessment techniques, such as Particle Image Velocimetry (PIV) and Particle Tracking Velocimetry (PTV), are limited to optically transparent media. However,
Julian Kattinger, Phi-Long Chung, Mike Kornely, Julian Ehrler, Marc Kreutzbruck, Christian Bonten   +5 more
doaj   +1 more source

İNTRAUTERİN GELİŞME GERİLİĞİ OLGULARINDA UTERİN ARTER DOPPLER BULGULARININ PLASENTA YATAK BİYOPSİSİ HİSTOLOJİSİ İLE İLİŞKİSİ

Cerrahpaşa Medical Journal, 2014
Background and Design.- The aim of this study was to determine the relationship between placental bed biopsy findings and uterine artery doppler flow parameters in intrauterine growth retardation(IUGR). We tested the hypotesis that Doppler velocimetry of
Aslı SOMUNKIRAN, Rıza MADAZLI, Zerrin CALAY, Şennur İlvan, Begüm KÖRBEYLİ, Yavuz ŞİMŞEK   +5 more
doaj  

Variable Temporal Interval OCTA Velocimetry Enables Wide-Range Hemodynamic Mapping in Hyperoxia Models. [PDF]

Invest Ophthalmol Vis Sci
Xiao G, Ruan B, Pan H, Hu W, Tian X, Wang H, Wang L.   +6 more
europepmc   +1 more source

Association between uterine artery Doppler velocimetry, placenta accreta spectrum, and depth of placental implantation. [PDF]

Pregnancy (Hoboken)
Kassir E, Hernandez-Andrade EA, Gerulewicz-Vannini D, Agarwal N, Mehl ST, Soto-Torres EE, Papanna R, Blackwell SC, Sibai BM, Amro FH.   +9 more
europepmc   +1 more source