Results 31 to 40 of about 351,968 (210)

Helical vortex theory and blade element analysis of multi‐bladed windmills

Wind Energy, 2023
Multi‐bladed windmills usually pump water for agriculture and domestic consumption, often in remote locations. Although they have been around for over 150 years, their aerodynamic performance is still poorly understood.
Itoje H. John, David H. Wood, Jerson R.P. Vaz   +2 more
doaj   +1 more source

Experimental study on mechanism for pumping-induced land subsidence [PDF]

Proceedings of the International Association of Hydrological Sciences, 2020
Groundwater pumping can cause severe land subsidence, yet the mechanisms have not been completely clear. A laboratory physical model test was done to investigate the mechanism for pumping-induced land subsidence.
Y. Zhang, G. He, J. Wu, Z. Zhu, X. Yan, T. Yang   +5 more
doaj   +1 more source

Multiobjective optimization of water distribution systems accounting for economic cost, hydraulic reliability, and greenhouse gas emissions [PDF]

, 2013
In this paper, three objectives are considered for the optimization of water distribution systems (WDSs): the traditional objectives of minimizing economic cost and maximizing hydraulic reliability and the recently proposed objective of minimizing ...
Angus R. Simpson, Atiquzzaman, Das, Deb, Duan, Farmani, Fearnside, Filion, Fu, Fu, Giustolisi, Halhal, Holger R. Maier, Ilich, Jayaram, Kapelan, Keedwell, Khu, Li, Nitivattananon, Ormsbee, Pezeshk, Prasad, Savic, Schneiter, Simpson, Todini, Tolson, Ulanicki, Walski, Water Services Association of Australia, Wenyan Wu, Wu, Wu, Wu, Wu, Wu, Zyl   +37 more
core   +1 more source

Fault diagnosis of large-scale electric pumping and irrigation electromechanical equipment by integrating CWT and swin transformer

Frontiers in Mechanical Engineering
This paper proposes a large-scale electromechanical equipment fault diagnosis framework that integrates continuous wavelet transform (CWT), Swin transformer, and cross attention. Firstly, CWT uses optimized complex Morlet wavelets (impact sharpness ratio
Jin Chen
doaj   +1 more source

Investigating the Double-Fissure Interactions of Hydraulic Concrete Under Three-Point Bending: A Simulation Study Using an Improved Meshless Method

Buildings
Hydraulic concrete is prone to cracking and interactive propagation under complex stress, threatening its structural integrity and service life. To address limitations of traditional numerical methods (e.g., mesh dependency in FEM) and imprecision of ...
Hua Zhang, Yanran Shi, Dong Niu, Yongqiang Xin, Dunzhe Qi, Bufan Zhang, Wei Li, Shuyang Yu   +7 more
doaj   +1 more source

Spatiotemporal evolution and influencing factors of carbon stock in the water receiving areas from the perspective of carbon neutrality

Scientific Reports
Water resources of water transfer projects are not only used to solve the water scarcity problem in the water-receiving area but also to change the regional carbon absorption capacity. Using the water-receiving area of the Jiangsu-Shandong section of the
Zhuoyue Peng, Mengting Li, Yaming Liu, Junxian Yin, Hongyuan Fang, Jiawei Wen   +5 more
doaj   +1 more source

Numerical Study on the Effects of Regional Groundwater Flow on the Contaminant Migration through an Inactive Supply Well as a Preferential Flow Pathway

Geofluids, 2022
Preferential flow pathways connect upstream and downstream channels in abandoned mines or seasonally pumping areas. The inactive supply well facilitates contaminant migration between aquifers leading to water quality challenges; it is important to note ...
Xu Li, Shilin Su, Qiang Guo, Haitao Zhang, Qi Zhu, Hamza Jakada   +5 more
doaj   +1 more source

A model study of enhanced oil recovery by flooding with aqueous surfactant solution and comparison with theory [PDF]

, 2015
With the aim of elucidating the details of enhanced oil recovery by surfactant solution flooding, we have determined the detailed behavior of model systems consisting of a packed column of calcium carbonate particles as the porous rock, n-decane as the ...
Clarke, Andrew, Fletcher, Paul D. I., Howe, Andrew M., Savory, Luke D., Woods, Freya   +4 more
core   +2 more sources

Review on Solar Photovoltaic-Powered Pumping Systems

Energies, 2022
Water and energy are becoming more and more important in agriculture, urban areas and for the growing population worldwide, particularly in developing countries.
Levon Gevorkov, José Luis Domínguez-García, Lluis Trilla Romero   +2 more
doaj   +1 more source

Comparison of Methods of Pump Scheduling in Water Supply Systems [PDF]

, 2001
In the domestic water supply industry, the reduction of pumping costs is a continuing objective. With the efficient scheduling of pumping operations, it is considered that 10% of the annual expenditure on energy and related costs may be saved.
Darbyshire, K, Waterworth, G
core