Results 191 to 200 of about 42,529 (238)

Early Predictive Value of Peripheral Inflammatory Index Combined with High-Sensitivity Troponin T for Sepsis-Induced Cardiomyopathy. [PDF]

Mediterr J Hematol Infect Dis
Zong C, Wu F, Chu X, Chen F, Yang J, Zhou H, Zhu B.   +6 more
europepmc   +1 more source

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Evaluation of the 3D-PIV standard images (PIV-STD project)

Journal of Visualization, 2000
Particle Imaging Velocimetry (PIV) offers many advantages for studies of fluid flows. Lots of PIV techniques have been developed and applied to various flow fields. However, there are no standard tools for evaluation of the PIV system effectiveness and accuracy. To popularize the PIV for practical use, the PIV system should have some standard.
T Saga, Okamoto K, Kobayashi T
exaly   +2 more sources

PIV Web Visualization System toward PIV visualization grid

Journal of Visualization, 2003
To visualize the simulation and experimental data, the fluid dynamics scientists and engineers have to possess a powerful visualization engine with CG package in their laboratories. We developed a Problem Solving Environment (PSE) system called "PIV Web Visualization System" to solve this obstacle, using computational grid common service tool "Globus",
Yoshimasa Kadooka, Hiromichi Kobashi, Jang-Woon Choi, Young-Ho Lee, Yoshio Tago   +4 more
openaire   +1 more source

Direct comparison of 2D PIV and stereoscopic PIV measurements

Measurement Science and Technology, 2002
A stereoscopic particle image velocimetry (PIV) measurement system based on the translation configuration was developed and applied to the flow behind a forward-swept axial-fan with five blades in a water tank. The 3D calibration procedure was employed to compensate the distortion and refraction of particle images.
Yoon, JH, Lee, SJ
openaire   +2 more sources

Applications: Stereo PIV and Multiplane Stereo PIV

2018
The various methods of image reconstruction and calibration as described in Sect. 8.1 were applied in the measurement of the unsteady vortex ring flow field in 1995. Figure 11.125 outlines a vortex ring generator having a simple construction with very reproducible flow characteristics.
Markus Raffel, Christian E. Willert, Fulvio Scarano, Christian J. Kähler, Steven T. Wereley, Jürgen Kompenhans   +5 more
openaire   +1 more source

PIV error correction

Experiments in Fluids, 2000
A non-post-interrogation method of reducing subpixel errors and eliminating spurious vectors from particle image velocimetry (PIV) results is presented. Unlike methods that rely on the accuracy or similarity of neighboring vectors, errors are eliminated before correlation information is discarded using available spatial and/or temporal data.
openaire   +1 more source

Guidelines for the Authorization of PIV Card and Derived PIV Credential Issuers

2023
The document provides appropriate and useful guidelines for assessing the reliability of issuers of PIV Cards and derived PIV credentials. These issuers store personal information and issue credentials based on OMB policies and the standards published in response to HSPD-12. The reliability of an issuer is of utmost importance when an organization (e.g.
Hildegard Ferraiolo, Andrew Regenscheid, Sarbari Gupta, Nabil Ghadiali   +3 more
openaire   +1 more source

Acoustic PIV: Measurement of the acoustic particle velocity using synchronized PIV-technique

The Journal of the Acoustical Society of America, 2008
This paper outlines a technique for measuring the acoustic particle velocity and the flow field simultaneously by applying synchronized particle image velocimetry (PIV). As test set-up a squared acrylic glass chamber was chosen. One side of the test section is connected to a loudspeaker, which allows a sinusoidal excitation of the chamber. To point out
Fischer, A., Sauvage, E., Röhle, I.
openaire   +2 more sources

Analysis of stereoscopic PIV measurements using synthetic PIV images

2004
This paper describes the use of a synthetic image generator (SIG) for the assessment of the precision of a stereoscopic PIV system. The geometry implemented with the SIG closely matches that of an existing stereo-PIV measurement in laminar pipe flow. The calibration procedure is simulated, which demonstrates the necessity of a careful alignment between
Petracci, A., Doorne, C. W. H., Westerweel, J., Lecordier, Bertrand   +3 more
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