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A Comparative Assessment of Aerodynamic Models for Buffeting and Flutter of Long-Span Bridges

Igor Kavrakov, Guido Morgenthal

Engineering 2017, Volume 3, Issue 6,   Pages 823-838 doi: 10.1016/j.eng.2017.11.008

Abstract: time domain by comparing the dynamic response of a multi-span cable-stayed bridge during the critical erectionThe selected models are studied for a windspeed range that is typical for the construction stage for

Keywords： Buffeting     Flutter     Long-span bridges     Bridge aerodynamics     Bridge aeroelasticity     Erection stage    

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Key technology research on construction for the middle tower of suspension bridge

Tian Wei,Liu Jianbo and You Xinpeng

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 23-28

Abstract: Meanwhile，control measure is used to prevent caisson sinking suddenly and extra-sinking in final stageErection accuracy of steel tower is very high, but adjusted segments are few.the project, which analyzed the error of manufacturing segment, linear of pre-assembled segment and erectionThe final accuracy of erection is better than that designed.this project, and the key technologies about construction of deepwater caisson , manufacturing and erection

Keywords： Taizhou Bridge     anchor pier positioning     real time monitoring     control measure in final stage     whole processcontrol     erection accuracy    

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The research on method of geometry-control during erection of the short-line bridge

Wang Min,Zhang Yongtao,Liu Jinghong,Liu Yi,Huang Yue

Strategic Study of CAE 2009, Volume 11, Issue 11,   Pages 79-81

Abstract:

Focus on error control during fabricating and suspended splicing of box girders with segmentation method. After the analysis of the error reasons, and the combination with practical engineering—Sutong B2, it discussed control method, computing method and sensitive analysis method of linear control of prefabricated pre-stressed continuous beam bridge assembly with short line method.

Keywords： geometry-control     error analysis     least square method     erection of the short-line method    

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Compressor performance of two-stage turbocharging system

HE Yituan, MA Chaochen, WEI Mingshan, ZHU Zhifu, HE Yituan

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 218-221 doi: 10.1007/s11465-008-0027-0

Abstract: To study the performance of high and low stage compressors and that of the system as a whole, a two-stageturbocharging system was matched, and a special two-stage turbocharging system test bench was built.For each test curve, the speeds of the two stage turbochargers were adjusted to the fixed data, and amany differences between the corrected mass flow and the actual mass flow of the high pressure (HP) stageThe system can get very high supercharging pressure when the speeds of the two stage turbochargers are

Keywords： special two-stage     HP     performance experiment     reliability     actual supercharging    

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Two-stage stochastic programming with robust constraints for the logistics network post-disruption response

Frontiers of Engineering Management   Pages 67-81 doi: 10.1007/s42524-022-0240-2

Abstract: address the LN post-disruption response strategy optimization problem, this study proposes a novel two-stage

Keywords： logistics network design     post-disruption response strategy     two-stage stochastic programming     conditional    

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Efficiency measurement for mixed two-stage nonhomogeneous network processes with shared extra intermediate

Qingxian AN, Xuyang LIU, Shijie DING

Frontiers of Engineering Management 2020, Volume 7, Issue 2,   Pages 259-274 doi: 10.1007/s42524-019-0080-x

Abstract: This study proposes a data-driven, mixed two-stage network data envelopment analysis model.

Keywords： shared resource allocation     mixed two-stage system     data envelopment analysis     efficiency    

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Modified landfill gas generation rate model of first-order kinetics and two-stage reaction

Jiajun CHEN , Hao WANG , Na ZHANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 313-319 doi: 10.1007/s11783-009-0025-4

Abstract: The first-order kinetics and two-stage reaction (FKTSR) model of the LFG generation rate includes mechanismsmodified FKTSR model, including the LFG production potential (), the reaction rate constant in the first stage(), and the reaction rate constant in the second stage () of 64.746 L, 0.202 d, and 0.338&

Keywords： landfill gas (LFG)     generation rate model     first-order kinetics     two-stage reaction     outflow function    

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Exergy analysis of multi-stage crude distillation units

Xingang LI, Canwei LIN, Lei WANG, Hong LI

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 437-446 doi: 10.1007/s11705-013-1349-y

Abstract: This paper aims to investigate the multi-stage effect on crude distillation units (CDUs) in thermodynamicsIn this regard, we proposed three-, four-, five-, and six-stage CDU processes with all variables constrainedWhen the exergy losses in heat exchangers are disregarded, the three- and four-stage CDUs have lowerexergy losses than the five- and six-stage CDUs.

Keywords： exergy     exergy loss     crude oil distillation     multi-stage     energy saving    

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Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 390-400 doi: 10.1007/s11465-013-0278-2

Abstract:

Design a small flow back-to-back two-stage centrifugal compressor in the aviation turbocharger, theTherefore, the stationary part of the back-to-back two-stage centrifugal compressor should pay full attention

Keywords： back-to-back     two-stage     centrifugal compressor     design     Internal flow    

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Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics

Chong PANG, Wei TAN, Endian SHA, Yuanqing TAO, Liyan LIU

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 329-338 doi: 10.1007/s11705-012-1205-5

Abstract: The design of two-stage pusher centrifuges have developed rapidly, but a good understanding of the theoryresults show that this simulation method could be an effective tool to optimize the design of the two-stage

Keywords： two-stage pusher centrifuge     multiphase flow     CFD     dynamic mesh     porous media    

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Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Frontiers of Engineering Management   Pages 425-438 doi: 10.1007/s42524-022-0205-5

Abstract: Investigations on environmental innovation system performance constantly assume a single-stage independentA two-stage data envelopment analysis (DEA) model is developed in this study to analyze the efficiency

Keywords： envelopment analysis     environmental efficiency     environmental innovation system     shared resources     two-stage    

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Key construction techniques for superstructure of the Fourth Nanjing Yangtze River Bridge

He Chaoran,Pan Guilin,Li Youwei

Strategic Study of CAE 2013, Volume 15, Issue 8,   Pages 42-47

Abstract: construction techniques for the superstructure, including lifting and installation of the cable saddles, erectioncables, rearrangement of the main cables, installation of the suspender cables and the cable clamps, erection

Keywords： Yangtze River Bridge     two-tower three-span suspension bridge     superstructure construction     main cable erection     steel box girder erection    

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Removal of odors and VOCs in municipal solid waste comprehensive treatment plants using a novel three-stage

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-021-1421-7

Abstract:

A novel three-stage integrated biofilter (TSIBF) composed of acidophilic

Keywords： Biofiltration     Multi-stage biofilter     Volatile organic compounds     Waste gas treatment     Bioaerosol emissions    

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Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane

Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 2,   Pages 265-278 doi: 10.1007/s11465-017-0453-y

Abstract: proposed in previous studies are mainly designed by considering only a single performance indicator of the stageIn this study, a 2-degree-of-freedom linear compliant positioning stage (LCPS) is developed by mechatronicdesign to balance the interacting performance indicators and realize the desired positioning stage.The analytical model of the stage is confirmed by experiments.dimension of the stage.

Keywords： mechatronic design     linear compliant positioning stage     large travel range     high out-of-plane payload capacity    

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Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 420-434 doi: 10.1007/s11465-020-0622-2

Abstract: Pilot two-stage proportional valves are widely used in high-power hydraulic systems.dynamic performance, reliability, and digitization of the traditional proportional valve, a novel two-stage

Keywords： two-stage proportional valve     digital flow distribution     high-speed on/off valve     position tracking characteristic    

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Title Author Date Type Operation

A Comparative Assessment of Aerodynamic Models for Buffeting and Flutter of Long-Span Bridges

Igor Kavrakov, Guido Morgenthal

Journal Article

Key technology research on construction for the middle tower of suspension bridge

Tian Wei,Liu Jianbo and You Xinpeng

Journal Article

The research on method of geometry-control during erection of the short-line bridge

Wang Min,Zhang Yongtao,Liu Jinghong,Liu Yi,Huang Yue

Journal Article

Compressor performance of two-stage turbocharging system

HE Yituan, MA Chaochen, WEI Mingshan, ZHU Zhifu, HE Yituan

Journal Article

Two-stage stochastic programming with robust constraints for the logistics network post-disruption response

Journal Article

Efficiency measurement for mixed two-stage nonhomogeneous network processes with shared extra intermediate

Qingxian AN, Xuyang LIU, Shijie DING

Journal Article

Modified landfill gas generation rate model of first-order kinetics and two-stage reaction

Jiajun CHEN , Hao WANG , Na ZHANG ,

Journal Article

Exergy analysis of multi-stage crude distillation units

Xingang LI, Canwei LIN, Lei WANG, Hong LI

Journal Article

Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

Journal Article

Simulating multiphase flow in a two-stage pusher centrifuge using computational fluid dynamics

Chong PANG, Wei TAN, Endian SHA, Yuanqing TAO, Liyan LIU

Journal Article

Sustainability performance analysis of environment innovation systems using a two-stage network DEA model

Journal Article

Key construction techniques for superstructure of the Fourth Nanjing Yangtze River Bridge

He Chaoran,Pan Guilin,Li Youwei

Journal Article

Removal of odors and VOCs in municipal solid waste comprehensive treatment plants using a novel three-stage

Journal Article

Mechatronic design of a novel linear compliant positioning stage with large travel range and high out-of-plane

Hua LIU, Xin XIE, Ruoyu TAN, Lianchao ZHANG, Dapeng FAN

Journal Article

Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

Journal Article