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Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 389-398 doi: 10.1007/s11465-010-0108-8

Abstract: This paper describes the dynamics of high-speed impact between the compressible water droplet and theThe phenomenon is known as water hammer effect.

Keywords： hydraulic descaling     scale     rolling     water-hammer     descaling theory    

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Evaluation of strategies for the subsequent use of CO 2

Marc SCHAEFER, Frank BEHRENDT, Thomas HAMMER,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 2,   Pages 172-183 doi: 10.1007/s11705-009-0236-z

Abstract: If substantial amounts of CO, which according to actual scenarios may in the future be captured from industrial processes and power generation, shall be utilized effectively, scalable energy efficient technologies will be required. Thus, a survey was performed to assess a large variety of applications utilizing CO chemically (e.g., production of synthesis-gas, methanol synthesis), biologically (e.g., CO as fertilizer in green houses, production of algae), or physically (enhancement of fossil fuel recovery, use as refrigerant). For each of the processes, material and energy balances were set up. Starting with pure CO at standard conditions, expenditure for transport and further process specific treatment were included. Based on these calculations, the avoidance of greenhouse gas emissions by applying the discussed technologies was evaluated. Based on the currently available technologies, applications for enhanced fossil fuel recovery turn out to be most attractive regarding the potential of utilizing large quantities of CO (total capacity>1000 Gt CO) and producing significant amounts of marketable products on one hand and having good energy and material balances on the other hand (

Keywords： industrial     generation     production     substantial     enhancement    

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The Study on Steady Flow and Transient Flow Mathematical Models for City’s Water Distribution Pipeline

Wang Shoudong,Shen Yongming,Jiang Hengzhi

Strategic Study of CAE 2007, Volume 9, Issue 12,   Pages 26-30

Abstract:

Firstly,  based on node equation method,  a water distributionmathematic model for transient flow set up by characteristic method can be used to forecast the harmful waterhammer occurring in operation of the system,  and to find the possible occurrence of the maximumnbsp;The results are that these models can be applied to hydraulic balance calculation for city's waterhammer.

Keywords： water distribution pipeline network     steady flow     transient flow     water hammer     Newton’s iteration method    

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metaheuristic optimizations (SCE and ABC) for prediction of compressive strength of concrete using rebound hammer

Dung Quang VU; Fazal E. JALAL; Mudassir IQBAL; Dam Duc NGUYEN; Duong Kien TRONG; Indra PRAKASH; Binh Thai PHAM

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1003-1016 doi: 10.1007/s11709-022-0846-9

Abstract: In this study, we developed novel hybrid models namely Adaptive Neuro Fuzzy Inference System (ANFIS) optimized by Shuffled Complex Evolution (SCE) on the one hand and ANFIS with Artificial Bee Colony (ABC) on the other hand. These were used to predict compressive strength (Cs) of concrete relating to thirteen concrete-strength affecting parameters which are easy to determine in the laboratory. Field and laboratory tests data of 108 structural elements of 18 concrete bridges of the Ha Long-Van Don Expressway, Vietnam were considered. The dataset was randomly divided into a 70:30 ratio, for training (70%) and testing (30%) of the hybrid models. Performance of the developed fuzzy metaheuristic models was evaluated using standard statistical metrics: Correlation Coefficient (R), Root Mean Square Error (RMSE) and Mean Absolute Error (MAE). The results showed that both of the novel models depict close agreement between experimental and predicted results. However, the ANFIS-ABC model reflected better convergence of the results and better performance compared to that of ANFIS-SCE in the prediction of the concrete Cs. Thus, the ANFIS-ABC model can be used for the quick and accurate estimation of compressive strength of concrete based on easily determined parameters for the design of civil engineering structures including bridges.

Keywords： shuffled complex evolution     artificial bee colony     ANFIS     concrete     compressive strength     Vietnam    

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Experimental studies on the axial crash behavior of aluminum foam-filled hat sections

WANG Qing-chun, FAN Zi-jie, GUI Liang-jin, WANG Zheng-hong, FU Zi-lai

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 381-387 doi: 10.1007/s11465-006-0044-9

Abstract: Drop hammer tests were carried out to study the axial crash behavior of aluminum foam-filled hat sections

Keywords： specified energy     aluminum foam-filled     energy absorption     non-filled     Drop hammer    

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Water,Water resources and Saving water in Agriculture

Liu Gengling

Strategic Study of CAE 2000, Volume 2, Issue 7,   Pages 39-42

Abstract:

The Characteristics of water and the issue of water resources in China are mainly discussed in theThe viewpoint that the situation of water resources in China cann´t be judged simplily by the amountof average yearly precipitation, and the exploitation and utilization of water resources depend on theIn general the water resources in China is enough for using, its unbalnced distribution in space-timeLots of experiences about bringing water under control and using water were accumulated by the Chinese

Keywords： water     water resources     saving water in agriculture     decentralized storage of water    

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Managing water for life

Daniel P. LOUCKS, Haifeng JIA

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 255-264 doi: 10.1007/s11783-011-0359-6

Abstract: Water is essential for life.of the entire engineering infrastructure devoted to the treatment, regulation and beneficial uses of water, occasionally sufficient quantities and qualities of water become scarce.When this happens, just how do we decide how much less water to allocate to all of us and the activitiesThis question of deciding just how much water to allocate to each water user and for the maintenance

Keywords： water stress     aquatic ecosystems     sustainable water resource allocations     ecosystem water requirements    

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The effect of different agricultural management practices on irrigation efficiency, water use efficiencyand green and blue water footprint

La ZHUO, Arjen Y. HOEKSTRA

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 185-194 doi: 10.15302/J-FASE-2017149

Abstract: This paper explores the effect of varying agricultural management practices on different water efficiencyindicators: irrigation efficiency (IE), crop water use efficiency (WUE), and green and blue water footprintResults show that deficit irrigation most effectively improved blue water use, by increasing IE (by 5%Improvements in one water efficiency indicator may cause a decline in another.

Keywords： field management     irrigation efficiency     water footprint     water productivity     water use efficiency    

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Emergency drinking water treatment in source water pollution incident-technology and practice in China

Xiaojian ZHANG , Chao CHEN ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 364-368 doi: 10.1007/s11783-009-0027-2

Abstract: An investigation into emergency potable water treatment technologies was conducted to investigate China’s water pollution situation.This paper presents the three largest and most significant water pollution incidents in China to dateRiver in November 2005, the cadmium pollution incident in the Beijiang River in December 2005, and the watercrisis with odorous tap water in Wuxi City in May 2007.

Keywords： emergency drinking water treatment     water pollution     adsorption     oxidation     precipitation    

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Molecular analysis of bacterial community in the tap water with different water ages of a drinking water

Feng Wang, Weiying Li, Yue Li, Junpeng Zhang, Jiping Chen, Wei Zhang, Xuan Wu

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1020-4

Abstract: Bacterial community in the drinking water distribution system (DWDS) was regulated by multiple environmentalfactors, many of which varied as a function of water age.In this study, four water samples with different water ages, including finished water (FW, 0 d) and tapwater (TW) [TW1 (1 d), TW2(2 d) and TW3(3 d)], were collected along with the mains of a practical DWDSResults indicated that the residual chlorine declined with the increase of water age, accompanied by

Keywords： Bacterial community     Water age     High-throughput sequencing technique     Drinking water distribution system    

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Comparative genotoxicity of water processed by three drinking water treatment plants with different water

Ting Zhang, Heze Liu, Yiyuan Zhang, Wenjun Sun, Xiuwei Ao

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1214-4

Abstract: Genotoxicity of substances is unknown in the water after treatment processes.Advanced water treatment is commonly used to remove micropollutants such as pesticides, endocrine disruptingchemicals, and disinfection byproducts in modern drinking water treatment plants.following the different water treatment processes.In this study, samples were collected from three drinking water treatment plants with different treatment

Keywords： Drinking water     Treatment process     Genotoxicity     Umu test     Ecological Structure-Activity Relationship    

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Bioinspired and biomimetic membranes for water purification and chemical separation: A review

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1412-8

Abstract:

•The history of biological and artificial water channels is reviewed

Keywords： Aquaporins     Artificial water channels     Biomimetic membranes     Chemical separation and water purification    

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A red water occurrence in drinking water distribution systems caused by changes in water source in Beijing

ZHANG Xiaojian,MI Zilong,WANG Yang,LIU Shuming,NIU Zhangbin,LU Pinpin,WANG Jun,GU Junnong,CHEN Chao

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 417-426 doi: 10.1007/s11783-013-0558-4

Abstract: A red water phenomenon occurred in several communities few days after the change of water source in BeijingThe results indicated that a significant increase in sulphate concentration as a result of the new watersource was the cause of the red water phenomenon.The mechanism of iron release was found that the high-concentration sulphate in the new water source-fold higher than that occurring within the local source water.

Keywords： iron release     drinking water distribution system     sulphate     phosphate     red water control     water quality stability    

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Title Author Date Type Operation

Numerical study of droplet dynamics impinging onto steel plate covered with scale layer

Jan BOHá?EK, Ale? HORáK

Journal Article

Evaluation of strategies for the subsequent use of CO 2

Marc SCHAEFER, Frank BEHRENDT, Thomas HAMMER,

Journal Article

The Study on Steady Flow and Transient Flow Mathematical Models for City’s Water Distribution Pipeline

Wang Shoudong,Shen Yongming,Jiang Hengzhi

Journal Article

metaheuristic optimizations (SCE and ABC) for prediction of compressive strength of concrete using rebound hammer

Dung Quang VU; Fazal E. JALAL; Mudassir IQBAL; Dam Duc NGUYEN; Duong Kien TRONG; Indra PRAKASH; Binh Thai PHAM

Journal Article

Ju Xiaojie: New Functional Materials for Water Treatment and Water Detection (2022-4-16)

9 Jun 2022

Conference Videos

Experimental studies on the axial crash behavior of aluminum foam-filled hat sections

WANG Qing-chun, FAN Zi-jie, GUI Liang-jin, WANG Zheng-hong, FU Zi-lai

Journal Article

Water,Water resources and Saving water in Agriculture

Liu Gengling

Journal Article

Wang Guangqian: Global Water Cycle and Water Resource Utilization (2019-10-17)

王光谦(院士)

20 Jan 2021

Conference Videos

Managing water for life

Daniel P. LOUCKS, Haifeng JIA

Journal Article

The effect of different agricultural management practices on irrigation efficiency, water use efficiencyand green and blue water footprint

La ZHUO, Arjen Y. HOEKSTRA

Journal Article

Emergency drinking water treatment in source water pollution incident-technology and practice in China

Xiaojian ZHANG , Chao CHEN ,

Journal Article

Molecular analysis of bacterial community in the tap water with different water ages of a drinking water

Feng Wang, Weiying Li, Yue Li, Junpeng Zhang, Jiping Chen, Wei Zhang, Xuan Wu

Journal Article

Comparative genotoxicity of water processed by three drinking water treatment plants with different water

Ting Zhang, Heze Liu, Yiyuan Zhang, Wenjun Sun, Xiuwei Ao

Journal Article

Bioinspired and biomimetic membranes for water purification and chemical separation: A review

Journal Article

A red water occurrence in drinking water distribution systems caused by changes in water source in Beijing

ZHANG Xiaojian,MI Zilong,WANG Yang,LIU Shuming,NIU Zhangbin,LU Pinpin,WANG Jun,GU Junnong,CHEN Chao

Journal Article