Results 201 to 210 of about 12,559 (259)

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

Low-Cost Custom-Built Flow Meters for Plant Hydraulic Conductance: Validation of Accuracy, Precision, and Reproducibility. [PDF]

Plant Direct
Samson-Tshimbalanga J, Périé C, Urli M.   +2 more
europepmc   +1 more source

Study on strength criterion of progressive failure of structural loess under hydraulic action and true triaxial test. [PDF]

PLoS One
Fang J, Luo A, Chen C, Fu W, Zhao Z.
europepmc   +1 more source

Upstream migration capacity of Acrossocheilus fasciatus: Behavioral strategies in response to hydraulic conditions and implications for low-head weir design. [PDF]

PLoS One
Wang B, Xu G, Fu L, You A, Xu Z, Ling Y.
europepmc   +1 more source

Alternative filter materials to natural sand and gravel in soil-based wastewater treatment systems. [PDF]

Environ Sci Pollut Res Int
Sindhøj E, Ulinder E, Cornelis G, Lindhe A, Sylwan I, Dahlberg AK, Löffler P, Eveborn D, Gustafsson JP, Wiberg K.   +9 more
europepmc   +1 more source

Biomechanics and Evolution of the Primate Tongue. [PDF]

Evol Anthropol
Sekhavati Y, Sellers KC, Ross CF.
europepmc   +1 more source

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A hydraulic drive of booster pumps

Thermal Engineering (English Translation of Teploenergetika), 2007
A proposal is made to use a hydraulic turbine as a drive for booster pumps in the feedwater systems of supercritical-pressure boilers.
exaly   +2 more sources

Hydraulics and hydraulic pneumatic drive. Hydraulics.

2023
The textbook outlines the basic laws of equilibrium and fluid motion in closed channels. The methods of using these laws in engineering calculations are considered, as well as recommendations for the design of individual elements of hydraulic systems are given.
Aleksandr Lepeshkin, Aleksandr Mihaylin, Anatoliy Sheypak, D. Shterenliht, Yu. Belenkov   +4 more
openaire   +1 more source

On the Dynamic Behavior of Servo-Hydraulic Drives

Nonlinear Dynamics, 1998
A servo-hydraulic drive for position control with a flapper-nozzle type servo-valve is described by a 10th-order, non-linear system of ODEs. This system is partially singularly perturbed. The perturbation stems from the compressibility of the hydraulic fluid and the fast dynamics of some sub-systems of the valve.
Scheidl, R., Manhartsgruber, B.
openaire   +2 more sources

Verified simulation of a hydraulic drive

Proceedings of the First Workshop on Robot Motion and Control. RoMoCo'99 (Cat. No.99EX353), 1999
To obtain reliable simulation results in the context of uncertain data and error propagation we use interval arithmetics and a self acting error calculus, and apply these methods to a hydraulic driven elastic robot. We describe a new explicit Sugeno-Takagi fuzzy model representation of a hydraulic differential cylinder with servo valve and show that a ...
D. Fansten, T. Mollers, H. Traczinski
openaire   +1 more source