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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 backwardfacing step.The 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 theThe primary reattachment length at the bottom wall downstream of the step is minimum for the step with

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

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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 backwardthe 3D numerical results enable a better understanding of the complex physical mechanism involved in backward

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

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Facing Challenges Together

Zhihua Zhong,Raj Reddy

Engineering 2016, Volume 2, Issue 1, Pages 1-1 doi: 10.1016/J.ENG.2016.01.032

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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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One-step synthesis of recoverable CuCo

Tongzhou Lu, Yongzheng Zhang, Chun Cheng, Yanbin Wang, Yongming Zhu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 4, Pages 595-604 doi: 10.1007/s11705-019-1818-z

Abstract: A facile one-step hydrothermal method has been adopted to directly synthesize the CuCo S material on

Keywords： copper cobalt sulfide recoverability one-step hydrothermal method anode material Li-ion battery

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On Step by Step Method in Developing Aero-Engines

Wen Junfeng

Strategic Study of CAE 2000, Volume 2, Issue 3, Pages 23-26

Abstract: The regularity and importance of the mode of step by step development are discussed and justified with

Keywords： aero-engine ways to develop aero-engines step by step method

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ApipelinedReed-Solomon decoder based on a modified step-by-step algorithm Article

Xing-ru PENG,Wei ZHANG,Yan-yan LIU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9, Pages 954-961 doi: 10.1631/FITEE.1500303

Abstract: propose a pipelined Reed-Solomon (RS) decoder for an ultra-wideband system using a modified stepby-stepTo reduce the complexity, the modified step-by-step algorithm merges two cases of the original algorithmThe area of the proposed decoder is 11.3% less than that of the previous step-by-step decoder with a

Keywords： Reed-Solomon codes Step-by-step algorithm Ultra-wideband Pipelined structure

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Microplastics removal strategies: A step toward finding the solution

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 1, Pages 7-7 doi: 10.1007/s11783-021-1441-3

Abstract:

Microplastics are an emerging threat and a big challenge for the environment. The presence of microplastics (MPs) in water is life-threatening to diverse organisms of aquatic ecosystems. Hence, the scientific community is exploring deeper to find treatment and removal options of MPs. Various physical, chemical and biological methods are researched for MPs removal, among which few have shown good efficiency in the laboratory. These methods also have a few limitations in environmental conditions. Other than finding a suitable method, the creation of legal restrictions at a governmental level by imposing policies against MPs is still a daunting task in many countries. This review is an effort to place all effectual MP removal methods in one document to compare the mechanisms, efficiency, advantages, and disadvantages and find the best solution.

Keywords： Aquatic Coagulation Microplastics Plastic Water Treatment Plant Wastewater

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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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Practical consideration for design and optimization of the step feed process

Shijian GE, Yongzhen PENG, Congcong LU, Shuying WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1, Pages 135-142 doi: 10.1007/s11783-012-0454-3

Abstract: Based on the anoxic/oxic (A/O) step feed process, a modified University of Cape Town (UCT) step feedConsequently, the modified UCT step feed process was more attractive for the wastewater treatment plant

Keywords： step feed anoxic/oxic (A/O) University of Cape Town (UCT) simultaneous nitrification and denitrification

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One-step synthesis of

Kuiyi YOU, Fangfang ZHAO, Xueyan LONG, Pingle LIU, Qiuhong AI, Hean LUO

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4, Pages 389-394 doi: 10.1007/s11705-012-1218-0

Abstract: fuming sulfuric acid, the selectivity for the desired product was significantly improved using this one-step

Keywords： -caprolactam AlVPO composite catalysts one-step synthesis concentrated sulfuric acid

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Two-step hydrothermal conversion of biomass waste to humic acid using hydrochar as intermediate

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 10, doi: 10.1007/s11783-023-1719-8

Abstract: A two-step hydrothermal treatment method was adopted in this study to produce humic acid from corn stalksIn the first step of the process, hydrochar was prepared at different hydrothermal temperatures and pH

Keywords： Biowaste Hydrochar Humic acid Hydrothermal parameter Unsaturation

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Error measurement and assemble error correction of a 3D-step-gauge

MAO Xinyong, LI Bin, SHI Hanmin, LIU Hongqi, LI Xi, LI Peigen

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4, Pages 388-393 doi: 10.1007/s11465-007-0067-x

Abstract: A new artifact called 3D-step-gauge consisting of a pyramid array and a compound, is proposed to calculateThe 3D-step-gauge was tested on an actual machine tool and the measurement result shows quick assembly

Keywords： volumetric pyramid assembly accuracy calibration

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Novel precision piezoelectric step rotary actuator

LIU Jianfang, YANG Zhigang, ZHAO Hongwei, CHENG Guangming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 356-360 doi: 10.1007/s11465-007-0062-2

Abstract: A novel piezoelectric (PZT) precision step rotary actuator was developed on the basis of PZT technologyuniformly distributed thin flexible hinge to solve problems such as ineffective anchoring/loosening, low stepcharacterized by high frequency (30 Hz), high speed (380 μrad/s), large travel (>270º), high resolution (1 μrad/stepIt greatly improves the ability to drive the existing PZT step rotary actuator.

Keywords： developed stability ineffective anchoring/loosening technology piezoelectric

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Denitrification and phosphorus uptake by DPAOs using nitrite as an electron acceptor by step-feed strategies

Bin MA, Shuying WANG, Guibing ZHU, Shijian GE, Junmin WANG, Nanqi Ren, Yongzhen PENG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2, Pages 267-272 doi: 10.1007/s11783-012-0439-2

Abstract: In this study, the step-feed strategy was proposed to achieve low nitrite concentration, which can avoidnitrite denitrified (anoxic P/N ratio) increased when the nitrite concentration was 15 mg·L after step-feedingDenitrification rate by DPAOs decreased gradually when nitrite (about 20 mg·L ) was added in the step-feedThese results indicated that the step-feed strategy can be used to achieve denitrifying phosphorus removal

Keywords： denitrifying phosphate accumulating organisms (DPAOs) denitrification phosphorus uptake nitrite step-feed