Results 31 to 40 of about 14,875 (278)

Efficiency Evaluation Of Implementation Of Optimization Methods Of Operation Modes Of The "Plast - Gas Pipeline" System By The Methods Of Mathematical Modeling [PDF]

, 2018
To date, Ukraine's mature gas fields, which are being developed in the gas regime, are at the final stage of development, which is characterized by a significant depletion of reservoir energy.
Bratakh, M. (Mikhailo), Filipchuk, O. (Oleksandr), Marushchenko, V. (Victor), Savchuk, M. (Myroslav), Tarwat, S. (Safaa)   +4 more
core   +2 more sources

Unveiling Su Aurigae in the near Infrared: New high spatial resolution results using Adaptive Optics

, 2004
We present here new results on circumstellar nebulosity around SU Aurigae, a T-Tauri star of about 2 solar mass and 5 Myrs old at 152 pc in the J, H and K bands using high resolution adaptive optics imaging (0$\farcs$30) with the Penn state IR Imaging ...
Abhijit Chakraborty, Grady C., Jian Ge, Petrov P. P., Shelton J. C., Woodgate B.   +5 more
core   +2 more sources

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

A Comprehensive Study of Broad Absorption Line Quasars: I. Prevalence of HeI* Absorption Line Multiplets in Low-Ionization Objects

, 2015
Neutral Helium multiplets, HeI*3189,3889,10830 are very useful diagnostics to the geometry and physical conditions of the absorbing gas in quasars. So far only a handful of HeI* detections have been reported.
Ji, Tuo, Jian, Ge, Jiang, Peng, Liu, Bo, Liu, Wen-Juan, Shi, Xiheng, Shu, Xinwen, Sun, Luming, Wang, Huiyuan, Wang, Shu-Fen, Wang, Ting-Gui, Yang, Chenwei, Yuan, Weimin, Zhang, Shaohua, Zhao, Wen, Zhou, Hongyan   +15 more
core   +1 more source

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

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

Artificial Neural Network Model for a Low Cost Failure Sensor: Performance Assessment in Pipeline Distribution [PDF]

, 2006
YesThis paper describes an automated event detection and location system for water distribution pipelines which is based upon low-cost sensor technology and signature analysis by an Artificial Neural Network (ANN).
Day, Andrew J., Khan, Asar, Machell, James, Mounce, Steve R., Widdop, Peter D., Wood, Alastair S.   +5 more
core   +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