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Robust public-private partnerships for joint railway and property development

Ka Fai NG, Hong K. LO, Yue HUAI

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 437-450 doi: 10.15302/J-FEM-2017068

Abstract: In joint railway and housing development, the approach of bundling railway and housing development (R&HD) allows cross-subsidization between immense railway construction cost and profitable housing rentalThis approach also provides flexibility in incorporating PPP models by distributing railway and housingNg and Lo (2015a) developed an evaluation framework for joint railway and property development, whichthe following questions: How would optimal configuration change under highly volatile population and railway

Keywords： public-private partnership BFOOD housing and railway development

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Study of Sustainable Urban Rail Transit Development Model in China

Wen-wu Yang

Frontiers of Engineering Management 2014, Volume 1, Issue 2, Pages 195-201 doi: 10.15302/J-FEM-2014026

Abstract: philosophy of transit-oriented-development （TOD） is discussed in this study by reviewing Hong Kong Railway+ Property development model which is proved very successful in mass transit rail development in Hong

Keywords： urban rail transit Railway+ Property(R+P) sustainability transit oriented development private public

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Engineering management on sustainability of urban rail transit development in China

Yang Wenwu

Strategic Study of CAE 2013, Volume 15, Issue 11, Pages 80-86

Abstract: By looking into the "railway+property" experience of Hong Kong, the key sustainability issues

Keywords： urban rail transit railway + property sustainability TOD private public partnership (PPP) engineering

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A computational toolbox for molecular property prediction based on quantum mechanics and quantitativestructure-property relationship

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2, Pages 152-167 doi: 10.1007/s11705-021-2060-z

Abstract: During these periods, one of the most important keys is the molecular property prediction models associatingIn this paper, a framework combining quantum mechanics and quantitative structure-property relationshipis established for fast molecular property predictions, such as activity coefficient, and so forth.which are stored in a database and further provided for the developments of quantitative structure-propertyThe whole framework has been carried out within a molecular property prediction toolbox.

Keywords： molecular property quantum mechanics quantitative structure-property relationship heat of reaction

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Being good or being known: International reputation of high-speed railway enterprises

Frontiers of Engineering Management Pages 455-466 doi: 10.1007/s42524-023-0250-8

Abstract: With fierce competition in the global high-speed railway (HSR) market, international reputation has become

Keywords： high-speed railway international reputation being good being known structural equation modeling

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Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4, Pages 546-552 doi: 10.1007/s11708-010-0116-8

Abstract: Both constant-property flows at normal pressure and variable-property flows at supercritical pressure

Keywords： convective heat transfer helical coils high Reynolds number supercritical pressure variable property

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A review on the application of nanofluids in enhanced oil recovery

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8, Pages 1165-1197 doi: 10.1007/s11705-021-2120-4

Abstract: Enhanced oil recovery (EOR) has been widely used to recover residual oil after the primary or secondary oil recovery processes. Compared to conventional methods, chemical EOR has demonstrated high oil recovery and low operational costs. Nanofluids have received extensive attention owing to their advantages of low cost, high oil recovery, and wide applicability. In recent years, nanofluids have been widely used in EOR processes. Moreover, several studies have focused on the role of nanofluids in the nanofluid EOR (N-EOR) process. However, the mechanisms related to N-EOR are unclear, and several of the mechanisms established are chaotic and contradictory. This review was conducted by considering heavy oil molecules/particle/surface micromechanics; nanofluid-assisted EOR methods; multiscale, multiphase pore/core displacement experiments; and multiphase flow fluid-solid coupling simulations. Nanofluids can alter the wettability of minerals (particle/surface micromechanics), oil/water interfacial tension (heavy oil molecules/water micromechanics), and structural disjoining pressure (heavy oil molecules/particle/surface micromechanics). They can also cause viscosity reduction (micromechanics of heavy oil molecules). Nanofoam technology, nanoemulsion technology, and injected fluids were used during the EOR process. The mechanism of N-EOR is based on the nanoparticle adsorption effect. Nanoparticles can be adsorbed on mineral surfaces and alter the wettability of minerals from oil-wet to water-wet conditions. Nanoparticles can also be adsorbed on the oil/water surface, which alters the oil/water interfacial tension, resulting in the formation of emulsions. Asphaltenes are also adsorbed on the surface of nanoparticles, which reduces the asphaltene content in heavy oil, resulting in a decrease in the viscosity of oil, which helps in oil recovery. In previous studies, most researchers only focused on the results, and the nanoparticle adsorption properties have been ignored. This review presents the relationship between the adsorption properties of nanoparticles and the N-EOR mechanisms. The nanofluid behaviour during a multiphase core displacement process is also discussed, and the corresponding simulation is analysed. Finally, potential mechanisms and future directions of N-EOR are proposed. The findings of this study can further the understanding of N-EOR mechanisms from the perspective of heavy oil molecules/particle/surface micromechanics, as well as clarify the role of nanofluids in multiphase core displacement experiments and simulations. This review also presents limitations and bottlenecks, guiding researchers to develop methods to synthesise novel nanoparticles and conduct further research.

Keywords： nanofluid EOR mechanism nanoparticle adsorption interface property internal property

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Intelligent construction technology of railway engineering in China

Chunfang LU, Junfei LIU, Yanhong LIU, Yuming LIU

Frontiers of Engineering Management 2019, Volume 6, Issue 4, Pages 503-516 doi: 10.1007/s42524-019-0073-9

Abstract: Intelligent construction technology has been widely used in the field of railway engineering.This work first analyzes the connotation, function, and characteristics of intelligent construction of railwaymanagement, and intelligent function, to deeply understand the development situation of intelligent railwayFinally, this work summarizes and analyzes the application situation of ICRE in the entire railway sectorIn the future, the ICRE of China’s railway sector will develop toward a higher stage.

Keywords： China railway sector intelligent construction railway engineering informatization development stage

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Evaluation of power regeneration in primary suspension for a railway vehicle

Ruichen WANG, Zhiwei WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2, Pages 265-278 doi: 10.1007/s11465-019-0571-9

Abstract: presents the feasibility of using power regenerating dampers (PRDs) in the primary suspension systems of railwayPRDs are configured as hydraulic electromagnetic-based railway primary vertical dampers and evaluatedIn several case studies, generic railway vehicle primary suspension systems that are configured to include

Keywords： railway vehicle primary damper power regeneration ride comfort running safety

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IN2CLOUD: A novel concept for collaborative management of big railway data

Jing LIN, Uday KUMAR

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 428-436 doi: 10.15302/J-FEM-2017048

Abstract: In the EU Horizon 2020 Shift2Rail Multi-Annual Action Plan, the challenge of railway maintenance is generatingIN2CLOUD will help the movement of railway industry systems from “local” to “global” optimization insecurity, economic sustainability, and decision support in the field of intelligent asset management of railway

Keywords： railway intelligent asset management collaborative learning big data hybrid cloud Bayesian

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Experimental study on compaction-induced anisotropic mechanical property of rockfill material

Xiangtao ZHANG, Yizhao GAO, Yuan WANG, Yu-zhen YU, Xun SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 109-123 doi: 10.1007/s11709-021-0693-0

Abstract: The anisotropy of rockfill materials has a significant influence on the performance of engineering structures. However, relevant research data are very limited, because of the difficulty with preparing specimens with different inclination angles using traditional methods. Furthermore, the anisotropy test of rockfill materials is complex and complicated, especially for triaxial tests, in which the major principal stress plane intersects with the compaction plane at different angles. In this study, the geometric characteristics of a typical particle fraction consisting of a specific rockfill material were statistically investigated, and the distribution characteristics of particle orientation in specimens prepared via different compaction methods were examined. For high-density rockfill materials, a set of specimen preparation devices for inclined compaction planes was developed, and a series of conventional triaxial compression tests with different principal stress direction angles were conducted. The results reveal that the principal stress direction angle has a significant effect on the modulus, shear strength, and dilatancy of the compacted rockfill materials. Analysis of the relationship between the principal stress direction angles, change in the stress state, and change in the corresponding dominant shear plane shows that the angle between the compacted surface and dominant shear plane is closely related to interlocking resistance associated with the particle orientation. In addition, different principal stress direction angles can change the extent of the particle interlocking effect, causing the specimen to exhibit different degrees of anisotropy.

Keywords： rockfill inclination of specimen preparation anisotropy mechanical property mechanism

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Experimental research on the mechanical property of prestressing steel wire during and after heating

ZHENG Wenzhong, HU Qiong, ZHANG Haoyu

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 247-254 doi: 10.1007/s11709-007-0031-1

Abstract: The mechanical property of prestressing steel wire during and after heating is the key factor in the, the shapes of stress-strain curves of steel wire at high temperature go smooth and the mechanical propertyAccording to the experiment after heating, the mechanical property of steel wire varies little when thelower than 300vH; while the stress-strain curves of steel wire become more ductile and the mechanical propertyThe law of mechanical property indexes of the wire is presented.

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Evaluation and Recombination of Property Right Configuration for Urban Water Supply System

Xiao Wen,Ouyang Fangrui,Wang Xianjia

Strategic Study of CAE 2004, Volume 6, Issue 7, Pages 48-52

Abstract:

In this paper, two basic models of recombination of property right configuration for urban water supplyThe evaluation index and methodology of property right configuration for urban water supply system areThe characteristics of the two property right configuration models and actions of different benefit bodiesThe strong points and shortcomings of the two property right models are analyzed.

Keywords： urban water supply system property right configuration recombination of property right evaluation ofproperty right model

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Reliability guarantee framework for the Sichuan–Tibet Railway

Frontiers of Engineering Management 2021, Volume 8, Issue 4, Pages 480-491 doi: 10.1007/s42524-021-0170-4

Abstract: The Sichuan–Tibet Railway is facing extraordinary challenges in terms of construction, operation, andproposes a novel reliability framework to guarantee the ideal operation state of the Sichuan–Tibet RailwayGiven the fact that the Sichuan–Tibet Railway is a complex giant system, Nine-Connotation was summarizedThe pathway for its application on railway construction was developed in this study.It also shows the reliability transmission and control mechanism of the railway’s giant complex system

Keywords： Sichuan–Tibet Railway operational efficiency reliability guarantee Nine-Connotation implementation

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novel strategy for the construction of silk fibroin–SiO composite aerogel with enhanced mechanical property

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3, Pages 288-297 doi: 10.1007/s11705-022-2222-7

Abstract: application of silica aerogels is an enormous challenge due to the difficulties in improving both mechanical propertyIn this work, silk fibroin was used as scaffold to improve the mechanical property and thermal insulationwas well-dispersed in the silk fibroin aerogel and composite aerogels exhibited enhanced mechanical propertynovel approach to preparing silk fibroin–SiO₂ composite aerogels with enhanced mechanical property

Keywords： silica aerogel silk fibroin impregnation thermal insulation mechanical property