Results 111 to 120 of about 1,700,794 (328)

Plants at the Pump: Reviewing Biofuels' Impacts and Policy Recommendations [PDF]

, 2008
Illustrates the need for standards and regulations to ensure that biofuels actually reduce greenhouse gas emissions. Calls for technology-neutral policies, sustainability benefits calculations, certification programs, and rethinking urban ...
Britt Childs Staley, Rob Bradley
core  

An assessment of stress and production rate of sucker rod heat pipes in oil well pumping system

Deep Underground Science and Engineering, EarlyView.
The sucker rod pumping system is the preferred oil extraction technique. The concept about equipping the hollow vacuum space in solid sucker rods with heat pipe has been scrutinized in terms of stress and oil production evaluation. Abstract The implementation of the heat pipe concept in sucker rods for oil pumping systems negates the requirement for an
R. S. Anand, Ang Li, Wenbo Huang, Juanwen Chen, Qingshan Ma, Fangming Jiang   +5 more
wiley   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 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

Assessing the Viability of Complex Electrical Impedance Tomography (EIT) with a Spatially Distributed Sensor Array for Imaging of River Bed Morphology: a Proof of Concept (Study) [PDF]

This report was produced as part of a NERC funded ‘Connect A’ project to establish a new collaborative partnership between the University of Worcester (UW) and Q-par Angus Ltd.
Hill, Graham, Holliday, R., Maddock, Ian, Visser, Fleur, Wynn, D.   +4 more
core  

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

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  

Feasibility of V/STOL concepts for short-haul transport aircraft [PDF]

Feasibility of V/STOL concepts for short-haul transport ...
Fry, B. L., Zabinsky, J. M.
core   +1 more source

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

A Mechanistic Model for Predicting and Optimising Oil-Sand Flow in Horizontal Wells Modèle mécanistique pour la prévision et l’optimisation des écoulements huile-sable dans des puits horizontaux

Oil & Gas Science and Technology, 2011
Smart well completion technology for sand management is being used more and more in the petroleum industry to increase productivity and cumulative hydrocarbon production over that of classical sand control techniques.
Bello O., Falcone G., Teodoriu C., Udong I.   +3 more
doaj   +1 more source