Results 41 to 50 of about 23,917 (167)

Experimental study and mechanism analysis on the effect of pumping agents on the compressive strength of paste slurries

open access: yes工程科学学报, 2016
Pumping agents can improve the fluidity of paste slurries. However,the effecting mechanism of pumping agents on the coagulability of paste slurries is not made clear.
LI Gong-cheng   +3 more
doaj   +1 more source

Diagnostic tests of vertical pumps modernized pump stations

open access: yesIOP Conference Series: Materials Science and Engineering, 2020
Abstract The article discusses the methods of maintenance and technical diagnostics of large vertical pumping units of modernized pumping stations of the largest cascades of the Amu-Bukhara and Karshi channels to ensure reliability during their operation, assesses the qualitative and quantitative changes in their modes.
O Glovatsky   +5 more
openaire   +1 more source

Prediction Method for Land Subsidence Induced by Foundation Pit Dewatering under Complex Conditions

open access: yesChengshi guidao jiaotong yanjiu
[Objective]To study the land subsidence variation patterns induced by foundation pit dewatering under complex conditions, the deep foundation pit project at Nanjing Metro Line 5 Airport Road Station is taken as a case study to predict the land subsidence
DUAN Qiguang
doaj   +1 more source

Study on hydrogeological characteristics of an alkali residue site in Tianjin port

open access: yesYantu gongcheng xuebao
In order to understand the physical, mechanical and engineering properties of alkali residue: a special soil mass, and summarize its hydrogeological characteristics, a large number of indoor physical tests: direct shear tests and permeability tests are ...
YE Jingxiong 1, SUN Huaijun 1, PAN Zidong 2
doaj   +1 more source

Comparison between Theim and Theis Equations in Analysis of Pumping Tests

open access: yesZanco Journal of Pure and Applied Sciences, 2019
The presented study is tried to analyze the main difference between the application of Theim (1906) and Thies (1935) equations for steady and non- steady conditions to determine the property of layer such as (Transmissivity , Specific yield and ...
dana khider mawlood
doaj   +1 more source

TEST AUTOMATION PUMPS

open access: yesЭнергосбережение. Энергетика. Энергоаудит., 2016
В статье обосновывается актуальность введения в практику эксплуатацию насосного оборудования нового вида, его испытаний-непосредственно на месте эксплуатации. Разработана, испытана и отлажена лабораторная установка центробежных насосов, позволяющая в реальном масштабе времени при помощи современных приборов и персонального компьютера строить ...
Kaniuk, Gennady Ivanovich   +4 more
openaire   +1 more source

Uncertainty assessment of aquifer hydraulic parameters from pumping test data

open access: yesApplied Water Science
Data 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
doaj   +1 more source

Numerical Analysis of a Fuel Pump for an Aircraft Diesel Engine

open access: yesMATEC Web of Conferences, 2019
The paper reports on the process of modelling a high-pressure common rail pump designed to supply a two-stroke compression-ignition engine, which includes the presentation of methodology for model construction and results of simulation tests.
Sochaczewski Rafał, Szlachetka Marcin
doaj   +1 more source

Behavior and Control of the Ballastless Track-Subgrade Vibration Induced by High-Speed Trains Moving on the Subgrade Bed with Mud Pumping

open access: yesShock and Vibration, 2019
This paper investigates behavior and control of the ballastless track-subgrade vibration induced by high-speed trains under mud pumping occurring in the subgrade bed.
Junjie Huang   +3 more
doaj   +1 more source

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