Results 31 to 40 of about 14,807 (258)

Modelling and transient simulation of water flow in pipelines using WANDA Transient software

Ain Shams Engineering Journal, 2017
Pressure transients in conduits such as pipelines are unsteady flow conditions caused by a sudden change in the flow velocity. These conditions might cause damage to the pipelines and its fittings if the extreme pressure (high or low) is experienced ...
P.U. Akpan, S. Jones, M.N. Eke, H. Yeung
doaj   +1 more source

Determination of low temperature toughness index of X80 unequaldiameter tee in stations of China-Russia Eastern Gas Pipeline

You-qi chuyun, 2020
To address the fracture control problem of X80 unequal-diameter tee used in China-Russia Eastern Gas Pipeline under low temperature environment (－45 ℃), the finite element model for X80 unequal-diameter tee with defects was built taking into ...
Zeguang YOU, Wenwei ZHANG, Cheng WANG, Weiqing FU   +3 more
doaj   +1 more source

Deep SDSS optical spectroscopy of distant halo stars I. Atmospheric parameters and stellar metallicity distribution

, 2014
We analyze a sample of tens of thousands of spectra of halo turnoff stars, obtained with the optical spectrographs of the Sloan Digital Sky Survey (SDSS), to characterize the stellar halo population "in situ" out to a distance of a few tens of kpc from ...
Beers, T. C., Bizyaev, D., Ebelke, G., Fernandez-Alvar, E., Lee, Y. S., Malanushenko, E., Malanushenko, V., Morrison, H. L., Oravetz, D., Pan, K., Prieto, C. Allende, Robin, A. C., Schlesinger, K. J., Schneider, D. P., Simmerer, J., Simmons, A., Sobeck, J.   +16 more
core   +3 more sources

Computational fluid dynamics-based study on the heavy crude oil-water emulsion flow through sudden expansion, contraction and 90° bend

Journal of Mechanical Engineering and Sciences
Oil-in-water emulsion (O/W) can be prepared to transport heavy crude oil (HCO) through a pipeline effectively with reduced viscosity and pumping power.
Arun Jana, Girish D. Vegad
doaj   +1 more source

Implementation of stability analysis approach for in-pipe inspection robot movement through pipeline fittings [PDF]

FME Transactions
The paper presents the implementation of the system stability testing approach based on the direct Lyapunov method. For this purpose, a pipeline inspection robot consisting of a driving and a driven part was used as an example.
Osman Krešimir, Perić Mato, Stamenković Dragi   +2 more
doaj   +1 more source

Automated pipeline reconstruction using deep learning & instance segmentation

ISPRS Open Journal of Photogrammetry and Remote Sensing, 2023
BIM is a powerful tool for the construction industry as well as for various other industries, so that its use has increased massively in recent years. Laser scanners are usually used for the measurement, which, in addition to the high acquisition costs ...
Lukas Hart, Stefan Knoblach, Michael Möser   +2 more
doaj   +1 more source

Velocities from Cross-Correlation: A Guide for Self-Improvement

, 2007
The measurement of Doppler velocity shifts in spectra is a ubiquitous theme in astronomy, usually handled by computing the cross-correlation of the signals, and finding the location of its maximum. This paper addresses the problem of the determination of
Carlos Allende Prieto, Rockosi C. M., Rockosi C. M., Simkin S. M., Yanny B.   +4 more
core   +1 more source

Computational fluid dynamics approach for energy savings evaluation in core annular flow of a horizontal T-pipe

Energy Reports, 2023
The application of core annular flow (CAF) has become an interesting solution in transporting heavy oil through pipeline because of its energy reduction and cost efficiency.
Cindy Dianita, Ratchanon Piemjaiswang, Benjapon Chalermsinsuwan   +2 more
doaj   +1 more source

Time--Distance Helioseismology Data Analysis Pipeline for Helioseismic and Magnetic Imager onboard Solar Dynamics Observatory (SDO/HMI) and Its Initial Results [PDF]

, 2011
The Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory (SDO/HMI) provides continuous full-disk observations of solar oscillations.
A. C. Birch, A. G. Kosovichev, A.C. Birch, A.C. Birch, A.C. Birch, A.G. Kosovichev, A.G. Kosovichev, A.G. Kosovichev, A.G. Kosovichev, B.H. Jacobsen, C. Lindsey, C. Lindsey, C. Lindsey, D. Georgobiani, D.-Y. Chou, D.A. Haber, H. Schunker, H.B. Snodgrass, I.N. Kitiashvili, J. G. Beck, J. Jackiewicz, J. Zhao, J. Zhao, J. Zhao, J. Zhao, J. Zhao, J. Zhao, J. Zhao, J. Zhao, J.G. Beck, J.M. Jensen, J.M. Jensen, J.M. Jensen, K. V. Parchevsky, K.V. Parchevsky, L. Gizon, L. Gizon, L. Gizon, L. Zhao, M. Rempel, P. H. Scherrer, P.H. Scherrer, P.M. Giles, R. Komm, R. Nigam, R. S. Bogart, R.F. Stein, S. Couvidat, S. Couvidat, S. Couvidat, S. Couvidat, S. Couvidat, S. Ilonidis, S. Zharkov, S.M. Hanasoge, S.P. Rajaguru, T. L. Duvall, T. Sekii, T.L. Duvall Jr., T.L. Duvall Jr., T.L. Duvall Jr., T.L. Duvall Jr.   +61 more
core   +3 more sources

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source