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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: Unreasonable allocation of shared resources reduces the system efficiency and is a considerable operationalmay cause internal contradictions among sub-processes and even lead to the collapsing of the entire systemThis study proposes a data-driven, mixed two-stage network data envelopment analysis model.shared extra intermediate resources among several nonhomogeneous subsystems and measure the overall system

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

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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: The term environmental innovation system refers to an innovation network composed of enterprises, universitiesInvestigations on environmental innovation system performance constantly assume a single-stage independentsystem while ignoring its internal structure.A two-stage data envelopment analysis (DEA) model is developed in this study to analyze the efficiencyof Chinese regional environmental innovation system by opening the “black box” and considering shared

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

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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 mechanismsof the nutrient balance for biochemical reaction in two main stages.modified 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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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.To find out the actual supercharging effect of the two-stage turbocharging system, it is better to adoptThe two-stage turbocharging system in this paper has much higher efficiency under most operating conditionsThe 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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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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Investigation into viability of using two-stage (pre-placed aggregate) concrete in Irish setting

John O’MALLEY, Hakim S. ABDELGADER,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 127-132 doi: 10.1007/s11709-010-0007-4

Abstract: Two-stage (pre-placed aggregate) concrete (TSC) consists of coarse aggregate, which is first depositedDuring the course of this study the formation of grout for two stage concrete was investigated usingreadily available 5 mm sand mixed in a slow speed paddle mixer.

Keywords： grout     pre-placed     concrete     two-stage concrete (TSC)    

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Valveless pumping using a two-stage impedance pump

V. C.-C. LEE, Y. A. ABAKR, K.-C. WOO

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 311-318 doi: 10.1007/s11465-013-0270-x

Abstract: been conducted in the past, but little experimental work was found to exploit the principle of multi-stageThis paper concentrates on the fluid behavior for an open-loop two-stage system experimentally.The aim of this work is to have an insight on the deliverable head and pumping rate of an open-loop two-stageimpedance pumping system.effect of different parameters towards the generation of unidirectional flows and composite flow of two

Keywords： valveless pumping     open-loop     two-stage     unidirectional     composite    

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Experiment and surge analysis of centrifugal two-stage turbocharging system

HE Yituan, MA Chaochen

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 365-368 doi: 10.1007/s11465-008-0073-7

Abstract: To study a centrifugal two-stage turbocharging system’s surge and influencing factors, a special testbench was set up and the system surge test was performed.indicate that the measured parameters such as air mass flow and rotation speed of a high pressure (HP) stagestandard condition according to the Mach number similarity criterion, because the air flow in a HP stageAccordingly, the reasons leading to a two-stage turbocharging system’s surge can be analyzed according

Keywords： auto-modeling     compressor     Reynolds number     characteristic     standard condition    

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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-stageAn equivalent tractable mixed-integer linear programming reformulation is further derived by linearizingA comparison with the rerouting strategy and two benchmark models demonstrates the superiority of the

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

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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 theoryThese results 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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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.the dynamic performance, reliability, and digitization of the traditional proportional valve, a novel two-stageIn particular, the dual nozzle-flapper is decoupled by two high-speed on/off valves (HSVs).

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

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Reinforcement of the two-stage leaching of laterite ores using surfactants

Peiyu Zhang, Hairui Wang, Jingcheng Hao, Jiwei Cui

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 562-570 doi: 10.1007/s11705-020-1946-5

Abstract: A two-stage leaching process, namely, high-pressure acid leaching-atmospheric acid leaching, was used

Keywords： laterite ore     Ni     surfactant     acid leaching    

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Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration

ZHOU Xuefei, REN Nanqi

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 53-56 doi: 10.1007/s11783-007-0010-8

Abstract: In this study, the two-stage upflow anaerobic sludge blanket (UASB) system and batch experiments wereThe methanogenic bacteria of the system, viz.Granular sludge of the system could protect the methanogenic bacteria within its body against the impact

Keywords： pH     Granular     upflow anaerobic     advisable pH     methanogenic    

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Microalgae cultivation and culture medium recycling by a two-stage cultivation system

Xinfeng Wang, Lu Lin, Haifeng Lu, Zhidan Liu, Na Duan, Taili Dong, Hua Xiao, Baoming Li, Pei Xu

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 6, doi: 10.1007/s11783-018-1078-z

Abstract:

A two-stage system was designed for microalgae cultivation and nutrients

Two species of microalgae were cultivated for

Keywords： Microalgae harvest     Ultrafiltration     Poultry wastewater     Nutrient removal     Two stage cultivation    

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An efficient two-stage approach for structural damage detection using meta-heuristic algorithms and group

Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 907-929 doi: 10.1007/s11709-020-0628-1

Abstract: In this study, the performance of an efficient two-stage methodology which is applied in a damage detectionsystem using a surrogate model of the structure has been investigated.In the first stage, in order to locate the damage accurately, the performance of the modal strain energyIn the second stage, to estimate the damage extent, the sensitivity of most used modal properties due

Keywords： two-stage method     modal strain energy     surrogate model     GMDH     optimization damage detection    

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Title Author Date Type Operation

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

Qingxian AN, Xuyang LIU, Shijie DING

Journal Article

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

Journal Article

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

Jiajun CHEN , Hao WANG , Na ZHANG ,

Journal Article

Compressor performance of two-stage turbocharging system

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

Journal Article

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

Lei HUO, Huoxing LIU

Journal Article

Investigation into viability of using two-stage (pre-placed aggregate) concrete in Irish setting

John O’MALLEY, Hakim S. ABDELGADER,

Journal Article

Valveless pumping using a two-stage impedance pump

V. C.-C. LEE, Y. A. ABAKR, K.-C. WOO

Journal Article

Experiment and surge analysis of centrifugal two-stage turbocharging system

HE Yituan, MA Chaochen

Journal Article

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

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

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

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

Journal Article

Reinforcement of the two-stage leaching of laterite ores using surfactants

Peiyu Zhang, Hairui Wang, Jingcheng Hao, Jiwei Cui

Journal Article

Acid resistance of methanogenic bacteria in a two-stage anaerobic process treating high concentration

ZHOU Xuefei, REN Nanqi

Journal Article

Microalgae cultivation and culture medium recycling by a two-stage cultivation system

Xinfeng Wang, Lu Lin, Haifeng Lu, Zhidan Liu, Na Duan, Taili Dong, Hua Xiao, Baoming Li, Pei Xu

Journal Article

An efficient two-stage approach for structural damage detection using meta-heuristic algorithms and group

Hamed FATHNEJAT, Behrouz AHMADI-NEDUSHAN

Journal Article