Results 111 to 120 of about 1,426 (304)

OPTIMIZACIÓN DEL TRANSPORTE POR OLEODUCTO DE CRUDO PESADO CASTILLA

Revista Fuentes El Reventón Energético, 2019
Due to the increase in reserves and production of heavy crude oil in Colombia´s Llanos basin, and the decline of production of light conventional crude oil used traditionally as diluents, and as result of a comprehensive technical - economic evaluation ...
César Augusto García Chinchilla, Fabio Enrique Hernandez , Guillermo Cruz, Lilia Rodriguez, Luz Edelmira Afanador, Omar Caceres Rodriguez   +5 more
doaj  

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Integration of land use/land cover factors with machine learning in groundwater vulnerability assessment models for semi-arid regions Algeria

Desalination and Water Treatment
This study presents a multi-methodological assessment of groundwater vulnerability in the Ain Oussera Plain, Algeria, utilizing three DRASTIC model approaches integrated with machine learning techniques.
Mohamed Azlaoui, Salah Karef, Atif Foufou, Nadjib Haied, Aziez Zeddouri, Djamal Bengusmia   +5 more
doaj   +1 more source

RHEOLOGICAL PROPERTIES OF RAPESEED OIL AND HYDRAULIC OIL

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2012
This article presents the rheological behavior of refined rapeseed oil and hydraulic oil. Apparent viscosity of both oils was determined at temperatures between 40 and 90°C and shear rates ranging from 3.3 to 120 s-1. The aim of the study was to find a polynomial dependence of oil viscosity on temperature and shear rate.
openaire   +1 more source

The "New" Life of Water Hydraulics

, 2001
Povećana briga zbog negativnog ekološkog uticaja različitih tipova ulja, koji se koriste kao radni fluidi u konvencionalnim hidrauličnim sistemima, naterala je industriju hidraulike da svoje razvojne planove okreće ka novim tehnologijama kojima bi se ...
Gordić, Dušan, Šušteršič, Vanja, Babić, Milun, Milovanović, Dobrica   +3 more
core   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, EarlyView.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations

Deep Underground Science and Engineering, EarlyView.
Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu, Hanyi Wang, Quan Gan, Shuang Zheng   +3 more
wiley   +1 more source

Test of the electro-rheological attributions of silicon oil without additives under flow mode

, 2011
A claim has come up in the research of the mechatronical systems to develop special materials that can get information from a computer and change their attribution accordingly.
Földi László, Jánosi László
core