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Yusef Kianpoor Kalkhajeh, Bahman Jabbarian Amiri, Biao Huang, Azad Henareh Khalyani, Wenyou Hu, Hongjian Gao and Michael L. Thompson
Although phosphorus (P) is an essential nutrient for biological productivity, it can cause freshwater degradation when present at fairly low concentrations. Monitoring studies using continuous sampling is crucial for documenting P dynamics in freshwater ...
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Young Hwan Choi and Joong Hoon Kim
This study compares the performance of self-adaptive optimization approaches in efficient water distribution systems (WDS) design and presents a guide for the selection of the appropriate method employing optimization utilizing the characteristic of each...
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Alif Huazam
Pág. 1 - 7
Sales promotions are a key marketing tool in communication programs. Sales promotion comprises a wide variety of promotional tools designed to achieve short-term objectives (Huff et al., 1999). Monetary promotions, such as price discounts and coupo...
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Sydney Mothokwa, Estelle Gaigher, Elize Randall?, Melanie Moen
Pág. 7 bladsye
This article reports a case study that contributes to the literature on the development of 21st century skills in science classrooms in South Africa. The study explores the manner in which four experienced natural science teachers integrate practica...
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Weidong Cao, He Wang and Jian Tang
Guide vane submersible centrifugal pumps are a kind of submersible pump, and the fluid inside the pump is often mixed with gravel and other impurities during operation, affecting the pump?s operating efficiency and life expectancy. However, past studies ...
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Yadong Zhu, Haifeng Jiao, Shihui Wang, Wenbo Zhu, Mengcheng Wang and Songshan Chen
In order to study the pressure pulsation characteristics and structural dynamic response characteristics of a vertical shaft cross-flow pump, this study used a computational fluid dynamics (CFD) numerical simulation method to analyze the pressure pulsati...
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Hanqiao Han, Yun Long and Jinqing Zhong
When we tested the water jet propulsion pump, we found that there were significant vibrations in the pump, especially at small flow points that deviated from the design conditions. The water jet propulsion pump is a mixed-flow pump with guide vane, which...
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Sen Deng, Weiqiang Zhao, Tianbao Huang, Ming Xia and Zhengwei Wang
Kaplan turbines are generally used in working conditions with a high flow and low head. These are a type of axial-flow hydro turbine that can adjust the opening of the guide vanes and blades simultaneously in order to achieve higher efficiency under a wi...
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Andres Hurtado Carreon, Jose M. DePaiva and Stephen C. Veldhuis
The developed technique was applied in an industrial-level linear axis testbed, and its potential application is in an actual CNC machine?s linear axis subsystem.
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Gudeta Berhanu Benti, Jan-Olov Aidanpää and Rolf Gustavsson
In 2015, a 45 MW vertical hydropower machine exhibited excessive vibration after refurbishment. Measurements revealed a substantial bearing clearance at the lower generator guide bearing. Consequently, the bearing was unable to generate sufficient opposi...
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