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3D finite element method (FEM) simulation of groundwater flow during backward erosion piping

Kristine VANDENBOER,Vera van BEEK,Adam BEZUIJEN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 160-166 doi: 10.1007/s11709-014-0257-7

Abstract: Backward erosion piping is an important failure mechanism for cohesive water retaining structures whichIn this work, a 3D numerical approach of the groundwater flow leading to the erosion mechanism of backwarderosion piping is presented and discussed.and piping progression.erosion piping and thus can lead to a significant improvement in the safety assessment of water retaining

Keywords： backward erosion piping     groundwater flow     3D finite element method (FEM)    

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Analysis of flow over backward facing step with transition

Dwarikanath RATHA,Arindam SARKAR

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 71-81 doi: 10.1007/s11709-014-0270-x

Abstract: study of the velocity distribution and the separation phenomenon of flow of air over a two dimensional backwardThe flow of air over a backward facing step has been investigated numerically using FLUENT.Flow simulation has been carried out in a backward facing step having an expansion ratio (ratio of the

Keywords： Reattachment length     backward facing step     transition     flow separation     k-? model    

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Embankment dam foundation analysis for the decrease of internal erosion likelihood

Marc SMITH

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 431-436 doi: 10.1007/s11709-012-0183-5

Abstract: pressures in sand are higher and thus where the factor of safety against uplift is lower and internal erosion

Keywords： seepage detection     geostatistical analysis     dam monitoring     internal erosion     LIDAR survey    

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conservation in China’s coal-fired power industry by installing advanced units and organized phasing out backward

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 798-807 doi: 10.1007/s11708-019-0633-z

Abstract: up-gradation of the national unit capacity structure (including installing advanced production and phasing out backwardcapacity structure up-gradation on the decline in the national average NCCR suggests that phasing out backwardSince the effect of phasing out backward production may remain at a certain degree given a continualaction of phasing out backward capacity, it is suggested that the organized action of phasing out backward

Keywords： coal-fired power     energy conservation     net coal consumption rate     new installation     phasing out backward    

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Failure Processes Micro-characteristic Studies of Two Materials to Resist Cavitation Erosion and to ResistErosion and Abrasion

Wang Biao,Wang Yudong,Zhang Zihua,He Xiaokui,Zhu Xiaoli

Strategic Study of CAE 2001, Volume 3, Issue 8,   Pages 82-86

Abstract:

A typical cavitation erosion resisting sample,the weld deposited coationg of boronic stainless steel, and a typical erosion and abrasion resisting sample,the weld deposited coating of WC ceramic are micro-analyzedresistance to cavitation eroion, while weld deposited coating of WC ceramics is a better barrier to erosionForthermore,the material failure from erosion and abrasion is resulted from the combining actions of

Keywords： cavitation erosion     erosion and abrasion     micro-characteristic    

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Effect of land use and land cover change on soil erosion and the spatio-temporal variation in Liupan

Bin QUAN, M. J. M. R?MKENS, Rui LI, Fang WANG, Jie CHEN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 564-572 doi: 10.1007/s11783-011-0348-9

Abstract: To present the relationship between land use/cover change and spatio-temporal variation of soil erosionSoil erosion by water was the dominant mode of soil loss, while soil erosion by wind was only presentThe degree of soil erosion was classified into five severity classes: slight, light, moderate, severewith 146552 ha (8.8%), and very severe erosion by 97067.6 ha (5.8%).Soil erosion was severe on grassland with a moderate or low grass cover and on dry land.

Keywords： land use/land cover change     soil erosion     geographical information system     remote sensing     Liupan Mountain    

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General Optimization Design Research of Metallic Materials to Resist Cavitation Erosion and Abrasion

Wang Biao,Zhang Zihua,Wang Yudong

Strategic Study of CAE 2000, Volume 2, Issue 2,   Pages 64-67

Abstract:

For the design optimization of erosion and abrasion resisting metallic materials basic study and productivelyBasic study indicates that W, Co and Cr have better erosion and abrasion resisting property than otherchromium parental materials, and CoCrWC hard faced ceramic in the cobalt parental materials are better erosion

Keywords： hydraulic turbine     cavitation erosion and abrasion materials     design    

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The Theorem of the Resistance of Hydraulic Machine's Materials to Cavitation Erosion and Abrasion

Wang Biao,Wang Yudong,Zhang Zihua,Ye Xianguo

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 58-61

Abstract:

In order to confirm the dependence of the resistance of cavitation erosion and abrasion (CEA) on thecoating, boron stainless steel and titanium) were used to do the experiments of CEA and cavitation erosion

Keywords： hydraulic machine´     s materials     cavitation erosion and abrasion     theorem    

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Effects of alfalfa coverage on runoff, erosion and hydraulic characteristics of overland flow on loess

Shufang WU, Pute WU, Hao FENG, G. P. Merkley

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 76-83 doi: 10.1007/s11783-011-0282-x

Abstract: An evaluation of the interactions between vegetation, overland and soil erosion can provide valuableAn experiment was conducted to study water infiltration, runoff generation process, rate of sediment erosionhad supercritical flow, which indicate that the capability of the alfalfa slope for resisting soil erosion

Keywords： alfalfa     soil erosion     runoff and sedimentation     soil water infiltration     overland flow     hydrodynamic characteristics    

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The cavitation erosion damage process of dynamically loaded journal bearings

MA Yan-yan, CHENG Xian-hua

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 461-464 doi: 10.1007/s11465-006-0059-2

Abstract: mechanics when a jet created by bubble collapse acted on the bearing surface in the process of cavitation erosioncalculated efficiently using the proposed method, which develops a new method of analyzing cavitation erosion

Keywords： bearing     fraction increase     collapse     process     evolvement    

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Verifier-local revocation group signatures with backward unlinkability from lattices Research Articles

Yanhua ZHANG, Ximeng LIU, Yupu HU, Yong GAN, Huiwen JIA

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 6,   Pages 876-892 doi: 10.1631/FITEE.2000507

Abstract: However, none of the contemporary lattice-based VLR-GS schemes provide backward unlinkability (BU), which

Keywords： Group signature     Lattice-based cryptography     Verifier-local revocation     Backward unlikability     Short    

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Recognition of Fluvial Bank Erosion Along the Main Stream of the Yangtze River Article

Ge Yan, Heqin Cheng, Zeyu Jiang, Lizhi Teng, Ming Tang, Tian Shi, Yuehua Jiang, Guoqiang Yang, Quanping Zhou

Engineering 2022, Volume 19, Issue 12,   Pages 50-61 doi: 10.1016/j.eng.2021.03.027

Abstract:

Recognizing the risk of fluvial bank erosion is an important challenge to ensure the early warningThis study introduces a geomorphons-based algorithm to extract river bank erosion information by adjustingflatness values were used to build an interpretation strategy for the subaqueous features of riverbank erosionThe results show that the bank scarp, which is the erosion carrier, is covered by slope cells when theFluvial subaqueous dunes are considered an important factor accelerating bank erosion, particularly those

Keywords： Multibeam echo-sounding data     Morphological elements     Bank erosion     Bank scarp     Scour pits     Bank collapse    

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Branch-pipe-routing approach for ships using improved genetic algorithm

Haiteng SUI,Wentie NIU

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 316-323 doi: 10.1007/s11465-016-0384-z

Abstract:

Branch-pipe routing plays fundamental and critical roles in ship-pipe design. The branch-pipe-routing problem is a complex combinatorial optimization problem and is thus difficult to solve when depending only on human experts. A modified genetic-algorithm-based approach is proposed in this paper to solve this problem. The simplified layout space is first divided into three-dimensional (3D) grids to build its mathematical model. Branch pipes in layout space are regarded as a combination of several two-point pipes, and the pipe route between two connection points is generated using an improved maze algorithm. The coding of branch pipes is then defined, and the genetic operators are devised, especially the complete crossover strategy that greatly accelerates the convergence speed. Finally, simulation tests demonstrate the performance of proposed method.

Keywords： branch pipe     ship industry     piping system     optimization algorithm    

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Geosynthetics used to stabilize vegetated surfaces for environmental sustainability in civil engineering

Jie HAN,Jun GUO

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 56-65 doi: 10.1007/s11709-016-0380-8

Abstract: Two common applications are earth stabilization and erosion control.Geosynthetics used for erosion control are mostly related to slopes, river channels and banks, and pondgeosynthetics mainly function as surficial soil stabilization while vegetation provides green appearance and erosionsurfaces for environmental sustainability in civil engineering with the emphases on geosynthetic used for erosion

Keywords： erosion     geosynthetic     stabilization     sustainability     vegetation    

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Anti-erosion elastic coating design based on synchronous fluctuation principle

Guo Yuanjun,Xiao Hualin,Xu Daqing,Li Wenbin

Strategic Study of CAE 2008, Volume 10, Issue 9,   Pages 60-63

Abstract: relation of characteristic parameters between the perturbation wave of boundary layer and the surface erosioncorrugation wave of fluid-pass section, the anti-erosion design idea is proposed, which can realize

Keywords： erosion     boundary layer     elastic channel border     elastic coating     synchronous fluctuation    

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Title Author Date Type Operation

3D finite element method (FEM) simulation of groundwater flow during backward erosion piping

Kristine VANDENBOER,Vera van BEEK,Adam BEZUIJEN

Journal Article

Analysis of flow over backward facing step with transition

Dwarikanath RATHA,Arindam SARKAR

Journal Article

Embankment dam foundation analysis for the decrease of internal erosion likelihood

Marc SMITH

Journal Article

conservation in China’s coal-fired power industry by installing advanced units and organized phasing out backward

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Journal Article

Failure Processes Micro-characteristic Studies of Two Materials to Resist Cavitation Erosion and to ResistErosion and Abrasion

Wang Biao,Wang Yudong,Zhang Zihua,He Xiaokui,Zhu Xiaoli

Journal Article

Effect of land use and land cover change on soil erosion and the spatio-temporal variation in Liupan

Bin QUAN, M. J. M. R?MKENS, Rui LI, Fang WANG, Jie CHEN

Journal Article

General Optimization Design Research of Metallic Materials to Resist Cavitation Erosion and Abrasion

Wang Biao,Zhang Zihua,Wang Yudong

Journal Article

The Theorem of the Resistance of Hydraulic Machine's Materials to Cavitation Erosion and Abrasion

Wang Biao,Wang Yudong,Zhang Zihua,Ye Xianguo

Journal Article

Effects of alfalfa coverage on runoff, erosion and hydraulic characteristics of overland flow on loess

Shufang WU, Pute WU, Hao FENG, G. P. Merkley

Journal Article

The cavitation erosion damage process of dynamically loaded journal bearings

MA Yan-yan, CHENG Xian-hua

Journal Article

Verifier-local revocation group signatures with backward unlinkability from lattices

Yanhua ZHANG, Ximeng LIU, Yupu HU, Yong GAN, Huiwen JIA

Journal Article

Recognition of Fluvial Bank Erosion Along the Main Stream of the Yangtze River

Ge Yan, Heqin Cheng, Zeyu Jiang, Lizhi Teng, Ming Tang, Tian Shi, Yuehua Jiang, Guoqiang Yang, Quanping Zhou

Journal Article

Branch-pipe-routing approach for ships using improved genetic algorithm

Haiteng SUI,Wentie NIU

Journal Article

Geosynthetics used to stabilize vegetated surfaces for environmental sustainability in civil engineering

Jie HAN,Jun GUO

Journal Article

Anti-erosion elastic coating design based on synchronous fluctuation principle

Guo Yuanjun,Xiao Hualin,Xu Daqing,Li Wenbin

Journal Article