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Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 417-428 doi: 10.1007/s11709-018-0477-3

Abstract: A staggered scheme which solves the two fields of the problem separately is utilized for solution step

Keywords： phase-field modeling     FEM     staggered scheme     fracture    

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Numerical analysis on heat transfer enhancement by longitudinal vortex based on field synergy principle

WU Junmei, TAO Wenquan

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 365-369 doi: 10.1007/s11708-007-0055-1

Abstract: delta winglet pairs for an aligned tube bank fin-and-tube surface is more significant than that for a staggeredpower condition for the attack angle of 30º is larger than that for the attack angle of 45º either for staggered

Keywords： computational     inherent mechanism     staggered     decrease     transfer surface    

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Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 678-686 doi: 10.1007/s11708-021-0768-6

Abstract: Herein, a direct Z-scheme CdS/WO3 composite photocatalyst was fabricated based on carbon cloth

Keywords： photocatalysis     CdS/WO3     carbon cloth     Z-scheme     hydrogen evolution    

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Emergency design framework: a satellite preliminary scheme design

TENG Hongfei, WANG Yishou, ZHANG Bao

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 184-192 doi: 10.1007/s11465-007-0031-9

Abstract: Against the background of the preliminary scheme design of satellite payloads, emergency design was studied

Keywords： significant     intelligence     P2P     hereinafter     computer cooperation    

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A lightweight authentication scheme with user untraceability

Kuo-Hui YEH

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 259-271 doi: 10.1631/FITEE.1400232

Abstract: Unfortunately, based on our analysis, the proposed scheme fails to provide the property of user-untraceabilityA security enhanced authentication scheme is proposed to eliminate all identified weaknesses.

Keywords： Authentication     Privacy     Security     Smart card     Untraceability    

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ZnFe2O4/BiVO4 Z-scheme heterojunction for efficient visible-light photocatalytic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1728-1740 doi: 10.1007/s11705-023-2322-z

Abstract: A novel Z-scheme ZnFe2O4/BiVO4 heterojunction photocatalyst was successfully> demonstrated considerably enhanced photogenerated charge separation efficiencies because of the Z-schemeThis study thus provides a promising Z-scheme heterojunction photocatalyst for the efficient removal

Keywords： ZnFe2O4/BiVO4     Z-scheme heterojunction     photocatalytic degradation    

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Extended model predictive control scheme for smooth path following of autonomous vehicles

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 4-4 doi: 10.1007/s11465-021-0660-4

Abstract: This paper presents an extended model predictive control (MPC) scheme for implementing optimal path followingreal experiments are carried out to evaluate the feasibility and the effectiveness of the extended MPC scheme

Keywords： autonomous vehicles     vehicle dynamic modeling     model predictive control     path following     optimization algorithm    

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Effect of the new maternity insurance scheme on medical expenditures for caesarean delivery in Wuxi,

Chun Chen,Zhihong Cheng,Ping Jiang,Mei Sun,Qi Zhang,Jun Lv

Frontiers of Medicine 2016, Volume 10, Issue 4,   Pages 473-480 doi: 10.1007/s11684-016-0479-

Abstract: improve China’s healthcare systems, this study examined whether a cap-based medical insurance schemeAfter the scheme’s implementation, medical expenditures for caesarean deliveries declined and themedical expenditures of women covered by the scheme were significantly lower than those of uninsuredThese findings indicated the scheme’s effectiveness in minimizing caesarean delivery expendituresThe cap-based medical insurance scheme with shared financial interest between insurance and healthcare

Keywords： maternity insurance scheme     financial incentive     caesarean delivery     medical expenditure     China    

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Determination of the scheme of precision grinding compensation on the radome

GUO Dongming, LIU Minjing, ZHANG Chunbo, SHENG Xianjun, SUN Yuwen

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 263-266 doi: 10.1007/s11465-007-0045-3

Abstract: Determining the grinding scheme from the boresight error performance is the most important problem to

Keywords： mathematical     effective approach     experimental measurement     antenna     electromagnetic    

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Simulation of cross-flow-induced vibration of tube bundle by surface vorticity method

WANG Fenghao, JIANG Gedong, Lin John Zhang

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 243-248 doi: 10.1007/s11708-008-0049-7

Abstract: The flow-induced vibrations of four tubes in a rotated square and a staggered tube bundle in three-rowFrom the vorticity maps and vibration responses of the staggered tube bundle of different structural

Keywords： dominant     sub-critical Reynolds     staggered     Vorticity     three-row    

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Investigation on a mitigation scheme to resist the progressive collapse of reinforced concrete buildings

Iman TABAEYE IZADI, Abdolrasoul RANJBARAN

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 421-430 doi: 10.1007/s11709-012-0181-7

Abstract: This study presents the investigation of the approach which was presented by Thaer M. Saeed Alrudaini to provide the alternate load path to redistribute residual loads and preventing from the potential progressive collapse of RC buildings. It was proposed to transfer the residual loads upwards above the failed column of RC buildings by vertical cables hanged at the top to a hat steel braced frame seated on top of the building which in turn redistributes the residual loads to the adjacent columns. In this study a ten-storey regular structural building has been considered to investigate progressive collapse potential. Structural design is based on ACI 318-08 concrete building code for special RC frames and the nonlinear dynamic analysis is carried out using SAP2000 software, following UFC4-023-03 document. Nine independent failure scenarios are adopted in the investigation, including six external removal cases in different floors and three removal cases in the first floor. A new detail is proposed by using barrel and wedge to improve residual forces transfer to the cables after removal of the columns. Simulation results show that progressive collapse of building that resulted from potential failure of columns located in floors can be efficiently resisted by using this method.

Keywords： prevent progressive collapse     alternate load path     reinforced concrete buildings     nonlinear dynamic     retrofitting     cable     steel hat braced frame     barrel and wedge    

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Scheme Study and Strategy on Expansion of Ethylene Plant to 660 kt/a at Yanshan Petrochemical Company

Cao Xianghong

Strategic Study of CAE 2003, Volume 5, Issue 11,   Pages 34-46

Abstract:

Yanshan Petrochemical Company after having expanded its 300 kt/a steam cracking unit to 450kt/k in 1994 is still experiencing such problems as low feedstock flexibility, high energy consumption and smaller scale as compared to other ethylene units constructed in the same time. In order to fully improve technical capability of steam crackers, reduce energy consumption, improve feedstock flexibility and increase production capacity, a lot of technical revamp cases on steam cracking were studied and compared with attention focused on the feasibility, safety, operability of the related revamp cases, as well as the advanced nature and economical features of the cases studied. As regards the pyrolysis-quench-compression system, the steam crackers will be retrofitted on the site with the pyrolysis gasoline fractionation tower, quench water tower, pyrolysis gas compressor and steam turbine replaced by new ones, respectively. The separation system will adopt a low-pressure methane removal technology with the demathanizer tower replaced, coupled with the C3 catalytic rectification/hydrogenation technology, while the high-pressure depentanizer will be replaced with the addition of a propylene rectification tower. The fractionation flow sheet and equipment will be adjusted with the addition of a propylene compressor and compressor for binary mixture of methane-ethylene cooling agents. This revamp has expanded the ethylene capacity to the target of 660 kt/a with the actual capacity reaching 710 kt/a. This revamp project has remarkably reduced the energy consumption, which is capable of using naphtha, light diesel fuel, heavy diesel fuel and the hydrocracked tail oil as the steam cracking feedstock. This project is the first to apply refrigeration by means of a mixed ccx)ling agent and has succeeded in using C3 catalytic rectification/ hydrogenation technology, which has given an impetus to the progress of steam cracking industry in the world.

Keywords： ethylene     plant     expansion     scheme     stady    

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Integration of current identity-based district-varied health insurance schemes in China: implications and challenges

Hai-Qiang Wang, Zhi-Heng Liu, Yong-Zhao Zhang, Zhuo-Jing Luo

Frontiers of Medicine 2012, Volume 6, Issue 1,   Pages 79-84 doi: 10.1007/s11684-012-0179-5

Abstract: health insurance schemes in China fall into three categories: urban employee basic health insurance scheme, urban resident scheme, and new rural cooperative medical system.establishment of an urban-rural integrated, citizen-based, and nationwide-universal health insurance schemeRegardless of the possible challenges in implementation, the proposed new scheme is promising and may

Keywords： health insurance     urban employee basic health insurance scheme     urban-resident scheme     new rural cooperative    

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Temporal dimension and water quality control in an emission trading scheme based on water environmental

Zhaoxing HAN, Zhenyao SHEN, Yongwei GONG, Qian HONG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 119-129 doi: 10.1007/s11783-011-0272-z

Abstract: In this study, a new emission trading scheme was addressed based on WEFZ, accounting for both the temporalA water quality-control scheme was suggested based on the water quality requirement in the water functionalThe temporal and spatial factors above should be incorporated into the emission trading scheme based

Keywords： emission trading     water functional zone     water quality control    

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Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 227-236 doi: 10.1007/s11708-012-0198-6

Abstract: The impact of superconducting magnetic energy storage (SMES) was obtained on load shedding scheme.

Keywords： critical load     frequency response     load shedding     multi-area system     rate of change of frequency     superconducting magnetic energy storage (SMES) device    

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Title Author Date Type Operation

Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Journal Article

Numerical analysis on heat transfer enhancement by longitudinal vortex based on field synergy principle

WU Junmei, TAO Wenquan

Journal Article

Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Journal Article

Emergency design framework: a satellite preliminary scheme design

TENG Hongfei, WANG Yishou, ZHANG Bao

Journal Article

A lightweight authentication scheme with user untraceability

Kuo-Hui YEH

Journal Article

ZnFe2O4/BiVO4 Z-scheme heterojunction for efficient visible-light photocatalytic

Journal Article

Extended model predictive control scheme for smooth path following of autonomous vehicles

Journal Article

Effect of the new maternity insurance scheme on medical expenditures for caesarean delivery in Wuxi,

Chun Chen,Zhihong Cheng,Ping Jiang,Mei Sun,Qi Zhang,Jun Lv

Journal Article

Determination of the scheme of precision grinding compensation on the radome

GUO Dongming, LIU Minjing, ZHANG Chunbo, SHENG Xianjun, SUN Yuwen

Journal Article

Simulation of cross-flow-induced vibration of tube bundle by surface vorticity method

WANG Fenghao, JIANG Gedong, Lin John Zhang

Journal Article

Investigation on a mitigation scheme to resist the progressive collapse of reinforced concrete buildings

Iman TABAEYE IZADI, Abdolrasoul RANJBARAN

Journal Article

Scheme Study and Strategy on Expansion of Ethylene Plant to 660 kt/a at Yanshan Petrochemical Company

Cao Xianghong

Journal Article

Integration of current identity-based district-varied health insurance schemes in China: implications and challenges

Hai-Qiang Wang, Zhi-Heng Liu, Yong-Zhao Zhang, Zhuo-Jing Luo

Journal Article

Temporal dimension and water quality control in an emission trading scheme based on water environmental

Zhaoxing HAN, Zhenyao SHEN, Yongwei GONG, Qian HONG

Journal Article

Load shedding scheme for an interconnected hydro-thermal hybrid system with SMES

D. TYAGI, Ashwani KUMAR, Saurabh CHANANA

Journal Article