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Research and Implementation of IP - VPN

Li Xiuzhong

Strategic Study of CAE 2002, Volume 4, Issue 3, Pages 84-91

Abstract: For IP - VPN, now there are several mechanisms： VLL, VPRN, VPLS and VPDN.This paper places emphasis on VPRN and VPLS.And besides, VLAN, one way of VPLS, is introduced.

Keywords： virtual private routed network (VPRN) virtual private LAN segment (VPLS) border gateway protocol / multi-protocollabel switch (GP/MPLS) virtual router (VR) worst-case weighted fair queue (WF²Q) random early

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P2P energy trading via public power networks: Practical challenges, emerging solutions, and the way forward

Frontiers in Energy 2023, Volume 17, Issue 2, Pages 189-197 doi: 10.1007/s11708-023-0873-9

Abstract: via public power networks are identified and presented, based on the analysis of a practical Local VirtualPrivate Networks (LVPNs) case in North Wales, UK.

Keywords： distribution network local virtual private network network charges peer-to-peer (P2P) energy trading

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Are public‒private partnerships still an answer for social infrastructure?

Frontiers of Engineering Management Pages 467-482 doi: 10.1007/s42524-023-0249-1

Abstract: economic development and social benefits that are usually financed in the form of government grants, privateinvestment, and public‒private partnerships (PPPs).

Keywords： public‒private partnerships social infrastructure scientometric analysis systematic review

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State versus private sector provision of water services in Armenia

Naira HARUTYUNYAN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5, Pages 620-630 doi: 10.1007/s11783-012-0425-8

Abstract: Despite increasing advocacy and adaptation of public-private model of water governance worldwide sincethe 1990s, today only 5% of the world’s population is served by water utilities with private involvementThe present article examines the experience of the water sector in Armenia with private sector participationThe study describes the process of the introduction of public-private partnerships in the water sectorThe empirical evidence shows that private participation in general led to improved overall performance

Keywords： water governance water privatization public-private partnership operational efficiency Armenia transition

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Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.little effect on the cracking load but significantly influenced the failure and ultimate loads of the segmentIt is suggested that in the reinforcement design of the subway segment, the reinforcement ratio and thelongitudinal reinforcement can be chosen in the range of 0.7%–1.2% and 49%–55%, respectively, allowing the segmentuse the reinforcement and exert the design strength, thereby improving the bearing capacity of the segment

Keywords： shield tunnel bearing capacity failure mechanism segment reinforcement

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option-based optimization for financial incentive allocation in infrastructure projects under public–private

Shuai LI, Da HU, Jiannan CAI, Hubo CAI

Frontiers of Engineering Management 2020, Volume 7, Issue 3, Pages 413-425 doi: 10.1007/s42524-019-0045-0

Abstract: Financial incentives that stimulate energy investments under public–private partnerships are considered

Keywords： financial incentives public–private partnerships energy infrastructure projects real option optimization

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Manufacturing technique and performance of functionally graded concrete segment in shield tunnel

Baoguo MA, Dinghua ZOU, Li XU

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1, Pages 101-104 doi: 10.1007/s11709-009-0011-8

Abstract: The quality of segment is very important to the service life of shield tunnel.functionally graded materials was introduced to design and produce the functionally graded concrete segment

Keywords： shield tunnel functionally graded concrete segment (FGCS) manufacturing technology performance

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Design scheme and implementation for HY-2 ground segment mission control

Lan Youguo,Lin Mingsen,Xie Chunhua

Strategic Study of CAE 2014, Volume 16, Issue 6, Pages 13-20

Abstract:

Design scheme and implementation for HY-2 ground segment is introducedMission control subsystem is responsible for task scheduling，and system monitor，is nerve center of ground segment

Keywords： HY-2 ground segmentapplication system architecture layered scheduling system operational model

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Strategic Choice of the Development of the Private Universities

Fan Foju

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 204-208

Abstract:

After1980s, China's private education has displayed strong developmentPrivate Universities have undertaken certain responsibility and obligation in the process of the higherIn the process of their development, private universities need to refine and standardize the internal

Keywords： private university development strategy

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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: The involvement of the private sector in the construction or operation of an infrastructure project mayenhance the financial viability of projects, which facilitates the formation of public-private partnershipPPP exploits the strength of the private sector by shifting certain project risks from the public partyto the private sector who can efficiently manage certain risks.distributing railway and housing revenues and costs and their inherent risks properly to the public and private

Keywords： public-private partnership BFOOD housing and railway development

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A redundantly actuated PRPRP radial mechanism in the segment erector of a shield machine for synchronization

Wanghui BU, Zhenyu LIU, Jianrong TAN, Jin CHENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4, Pages 463-467 doi: 10.1007/s11465-011-0225-z

Abstract:

The shield machine is a heavy construction machine for tunnel excavation, and the segment erectorHence, this paper proposes a redundantly actuated PRPRP radial mechanism for the segment erector.

Keywords： redundant actuation parallel mechanisms five-bar mechanisms segment erectors shield machines

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Sustainable public-private partnerships: Balancing the multi-actor ecosystem and societal requirements

Pekka Leviäkangas, Yanbing YE, Oluwole Alfred OLATUNJI

Frontiers of Engineering Management 2018, Volume 5, Issue 3, Pages 347-356 doi: 10.15302/J-FEM-2018020

Abstract: networks (roads, railways, ports, electricity, and energy lines) can be solved partly by introducing privatecapital for investments, i.e., public-private partnerships (PPP).

Keywords： public-private partnerships (PPP) project appraisal and selection integrated model socially sustainable

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Drive system design and error analysis of the 6 degrees of freedom segment erector of shield tunneling

Hu SHI, Guofang GONG, Huayong YANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 369-376 doi: 10.1007/s11465-011-0223-1

Abstract:

Focusing on a segment erector of a shield-tunneling machine developed with 6 degrees of freedom (DOF) and controlled by electro-hydraulic proportional systems, the kinematics of the segment erection processFormulas for calculating the position and attitude error of the grip hand of the segment erector areerror analysis, providing a foundation for practical designing, manufacturing, and assembling of the segment

Keywords： shield tunneling machine segment erector kinematics position and attitude precision

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The influence of hand hole on the ultimate strength and crack pattern of shield tunnel segment joints

Shaochun WANG, Xi JIANG, Yun BAI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5, Pages 1200-1213 doi: 10.1007/s11709-019-0546-2

Abstract: The hand hole acts as a weak point and initial damage in the segment joint especially when the circumferentialMoreover, segment joints with MSSF are also tested to evaluate the effects of MSSF on the failure modeand structural performance of the segment joints.A \ /-type crack pattern is always observed before the final failure of the segment joints.The segment joint with MSSF shows higher ultimate bearing capacity and toughness compared to segment

Keywords： shield tunneling structural synthetic fiber concrete hand hole segment joint ultimate bearing capacity

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The Status and Problems in Developing Private Use Car for China

Guo Konghui

Strategic Study of CAE 2000, Volume 2, Issue 8, Pages 25-30

Abstract:

Should China develop its private use car? What kind of passenger car should China develop?the way to solve the“auto disaster”problems is not to put more restrains on the use of private

Keywords： Chinese auto industry private use car family use car state and problems