Results 51 to 60 of about 45,302 (169)
Applied SciencesWhen shield tunneling is carried out in poor geological areas with high water head and low strength, there is a great construction risk, and the external water pressure is one of the key factors affecting the stability and safety of the tunnel during ...
Haining Liu +6 more
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Prediction of ultradeep pore water inflow in giant thick heterogeneous aquifers
地质科技通报Objective The analytical solution model is computationally efficient and widely used to estimate aquifer surges. Analytical solution models are computationally efficient but involving many assumptions, such as that the aquifer is homogeneous, the amount ...
Di CHEN +3 more
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Codification of a fuzzy simulation-optimization model for optimal estimation of confined aquifer parameters based on a fuzzy transformation method [PDF]
مهندسی منابع آب, 2019 For proper groundwater resource management as a vital resource, accurate aquifer parameter determination is required. Existing groundwater management practices, for the sake of simplicity, overlook inherent uncertainties in measurements of pumping test ...
Atefeh Delnaz +2 more
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SODIUM PUMP DEVELOPMENT AND PUMP TEST FACILITY DESIGN [PDF]
, 1963 The study defines a program for the development of large sodium pamps for use with sodium cooled reactor systems of 1000 to 1500 Mw(e) capability, and the functionai requirements of a related sodium pump test facility for testing large pumps. The future pump requirements of large power systems have been estimated, a type of sodium pump recommended for ...
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Calculation methods of seepage coefficient of water cut-off curtain
Meikuang AnquanAs an effective water prevention and control technology to block or reduce groundwater infiltration, water cut-off curtain has been continuously applied to underground and open pit coal mines in recent years.
Yan ZHANG, Sheng GAO, Hao WANG
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Frontiers in Earth ScienceThe recent research aims to investigate the petrophysical and hydrogeological parameters of the Nubian aquifer system (NAS) in Northern Khartoum State, Sudan, using integrated geophysical methods, including surface electrical resistivity and geophysical ...
Musaab A. A. Mohammed +9 more
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Two-phase pump performance program: pump test facility description
, 1976 A description is given of the Two-Phase Pump Performance Project Test Facility, which is located at the Kreisinger Development Laboratory of Combustion Engineering, Inc., in Windsor, Connecticut. The text outlines and describes the physical system which constitutes the facility, as well as the specific pump being tested in the EPRI program ...
M. V. Couture +5 more
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Uncertainty assessment of aquifer hydraulic parameters from pumping test data
Applied Water ScienceData from pumping tests is a noisy process, and therefore, performing the pumping test numerous times will not get the same drawdown values. As a consequence, various pumping experiments lead to different values for aquifer parameter estimates.
Azza M. Bashandy +2 more
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Design and Development of Multi-mode Control System for Beam Pumping Unit
Shiyou jixie, 2018 In order to deal with the complicated and variable working conditions in the production process of the pumping unit, a multi-mode control system of the beam pumping unit is designed.
Ren Xuhu +5 more
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Design of the Polished Rod Load Simulation System for Pumping Unit Type Test
Shiyou jixie, 2017 To simulate the polished rod load of the pumping unit, a new polished rod load simulation test device has been designed. In the simulation test device, throttle valve and relief valve has been used to simulate the oil load of pumping unit, the heavy load
Wang Hongbo +3 more
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