Results 1 to 10 of about 136,664 (227)

ESTIMATION OF THE KINETIC HEAD COEFFICIENT (k) BASED ON THE GEOMETRIC CHARACTERISTICS OF EMITTER PIPES [PDF]

open access: yesEngenharia Agrícola, 2017
: The objective of this study was to determine the variability of the head loss as a function of the emitter geometry as well as to develop a relation between local head loss caused by the emitter insertion and geometric characteristics of the emitter ...
José H. N. Flores   +3 more
doaj   +5 more sources

Enhanced data usability in dynamic 68 Ga-PSMA-11 PET of intracranial tumors using a dynamic head motion correction algorithm [PDF]

open access: yesEJNMMI Physics
Background Head motion during dynamic positron emission tomography (dPET) compromises pharmacokinetic modeling, especially in prolonged acquisitions where motion artifacts invalidate quantitative analysis.
Risheng Yang   +6 more
doaj   +2 more sources

A kinetic comparison of back-loading and head-loading in Xhosa women [PDF]

open access: yesErgonomics, 2011
The purpose of this study was to compare the kinetic responses associated with ground reaction force measurements to both head-loading and back-loading in a group of Xhosa women. Altogether, 16 women were divided into two groups based on their experience
Cooke, Carlton   +3 more
exaly   +5 more sources

Mathematical modelling of crystallization of polymer solutions

open access: yesSistemnì Doslìdženâ ta Informacìjnì Tehnologìï, 2023
The processes of homogenization and crystallization of polymer solutions in cylindrical pipes are considered, which are described by the convective-diffusion equation with respect to the solution temperature and kinetic equations with respect to ...
Kyryl Zelensky
doaj   +1 more source

Entrainment and Turbulence Characteristics of Continuous-Flux Release Gravity Current over Rough Beds

open access: yesShanghai Jiaotong Daxue xuebao, 2021
In both the natural environment and hydraulic engineering, there widely exists the phenomenon of gravity current. In practical conditions, most beds are covered with gravel and sediment particles of different sizes, which can be regarded as rough bed ...
HAN Dongrui   +5 more
doaj   +1 more source

The effect of solid particle size and concentrations on internal flow and external characteristics of the dense fine particles solid–liquid two-phase centrifugal pump under low flow condition

open access: yesAIP Advances, 2021
In the energy conversion device and fluid transport equipment, the solid–liquid two-phase centrifugal pump occupies a large proportion, but the transport mechanism of dense fine particles has not been studied in detail. In this work, the solid–liquid two-
Yanping Wang   +5 more
doaj   +1 more source

Analyzing the Inlet Gas Void Fraction on the Flow Characteristics for a Multiphase Pump Based on Cavitation Cases

open access: yesJournal of Marine Science and Engineering, 2023
Inlet gas void fraction (IGVF) affects the cavitation evolution in a multiphase pump and easily results in a drop of the head and efficiency when cavitation is more serious.
Wenjuan Lv   +3 more
doaj   +1 more source

Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical–Axial Multiphase Pumps

open access: yesApplied Sciences, 2020
With the decrease of oil and gas resources on land, increased attention has been paid to multiphase oil−gas exploitation and the transportation technology represented by oil−gas multiphase pumps.
Wei Han   +5 more
doaj   +1 more source

Evolutionary Prediction of Soil Loss from Observed Rainstorm Parameters in an Erosion Watershed Using Genetic Programming

open access: yesApplied and Environmental Soil Science, 2021
Various environmental problems such as soil degradation and landform evolutions are initiated by a natural process known as soil erosion. Aggregated soil surfaces are dispersed through the impact of raindrop and its associated parameters, which were ...
Kennedy C. Onyelowe   +2 more
doaj   +1 more source

Cellular-Automata model for dense-snow avalanches [PDF]

open access: yes, 2007
This paper introduces a three-dimensional model for simulating dense-snow avalanches, based on the numerical method of cellular automata. This method allows one to study the complex behavior of the avalanche by dividing it into small elements, whose ...
Avolio M. V.   +7 more
core   +1 more source

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