Results 21 to 30 of about 190,703 (303)

Investigation on degradation mechanism of polymer blockages in unconsolidated sandstone reservoirs

open access: yese-Polymers, 2020
Polymer flooding technology has shown satisfactorily acceptable performance in improving oil recovery from unconsolidated sandstone reservoirs. The adsorption of the polymer in the pore leads to the increase of injection pressure and the decrease of ...
Dong Wenting   +3 more
doaj   +1 more source

Hydrocarbon Hydrate Flow Assurance History as a Guide to a Conceptual Model

open access: yesMolecules, 2021
This work reviews major hydrocarbon hydrate advances in flowline applications of 25 international hydrate organizations. After a review of hydrate history and the current state-of-the-art, four conclusions were drawn: (1) engineers must take risks and ...
E. Dendy Sloan
doaj   +1 more source

Modelling 3D blockage effects for millimetre-wave communication systems [PDF]

open access: yes, 2020
The millimetre wave (mmWave) band, which has a frequency range of 30-300 GHz, can provide the desired requirements for future communication systems, such as wide bandwidth and high data-rate with very low latency. However, these advantages entail several
Alsaleem, Fahd Nasser Mohammed
core   +1 more source

Packet Level Performance of 5G NR System Under Blockage and Micromobility Impairments

open access: yesIEEE Access, 2023
With the introduction of the Integrated Access and Backhaul (IAB) technology by 3GPP, the last mile in beyond 5G cellular systems will be characterized by multiple wireless backhaul links between the user equipment and base station.
Emil Khayrov, Yevgeni Koucheryavy
doaj   +1 more source

The Effects of Blockage on the Propagation of Acoustic Waves in the Liquid-Shell Coupled System [PDF]

open access: yes, 2009
The free vibration of a fluid/structure system consisting of a cylindrical blockage submerged in a liquid enclosed by a cylindrical shell is investigated for the purpose of pipe line transportation monitoring.
Gu, Fengshou   +4 more
core   +1 more source

Study on prevention and control measures of sandstone geothermal reinjection plugging

open access: yesWater Science and Technology, 2023
In the process of geothermal tailwater reinjection of sandstone, the problem of plugging has been seriously restricting the continuous development of geothermal reinjection for many years, and the problems of plugging are complex and changeable.
Xiangtao Wang   +6 more
doaj   +1 more source

Effect and Mechanism of Micro-Nano Aeration Treatment on a Drip Irrigation Emitter Based on Groundwater

open access: yesAgriculture, 2023
The problem of emitter clogging has become the main obstacle restricting the application and promotion of drip irrigation technology. Studying the process of emitter clogging helps improve irrigation efficiency and save water resources. A large number of
Rui Li   +8 more
doaj   +1 more source

Near‐ground propagation in automotive radar and communication obstructed deployments: Measurements and modelling

open access: yesIET Microwaves, Antennas & Propagation, 2022
Wireless communication and radars will play a crucial role for autonomous vehicles in the nearest future. However, the blockage caused by surrounding cars can degrade communication performance, while automotive radars are never aimed to operate in such ...
Dmitrii Solomitckii   +4 more
doaj   +1 more source

Experimental and Numerical Study of Rod Bundle Sub-channel Flow Field under Blockage

open access: yesYuanzineng kexue jishu, 2023
Experiment study of a 5×5 rod bundle was conducted to investigate the effect of blockage on sub-channel flow field and mass flow rate. A 3×3 block was set in a 5×5 rod bundle with the largest blocking percent of about 72% in the center sub-channel.
CHEN Denggao;BI Jingliang;HUANG Yanping;YUAN Dewen;ZAN Yuanfeng;XU Jianjun
doaj  

Blockage of Piano Key Weirs in Debris Flow with Individual Experiments [PDF]

open access: yesعلوم و مهندسی آبیاری, 2016
Due to the problems of hydraulic structures at blocking bodies in debris flows this research has been carried out. Hence, in this study the effect of the trap drop bodies such as logs and branches of trees on piano key weirs at individual step was ...
Kosar Mansouri, Javad Ahadian
doaj   +1 more source

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