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Convergence performance comparisons of PID, MRAC, and PID+MRAC hybrid controller

Dan ZHANG,Bin WEI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2, Pages 213-217 doi: 10.1007/s11465-016-0386-x

Abstract: The convergence performances of the PID control, MRAC, and hybrid PID+MRAC are also compared.Through the simulation in Matlab, the results show that the convergence speed and performance of theIn addition, the convergence performance of the hybrid control is better than that of the MRAC control

Keywords： proportional-integral-derivative (PID) control model reference adaptive control hybrid control convergencespeed comparison

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Numerical modeling and performance evaluation of passive convergence-permeable reactive barrier (PC-PRB

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1731-z

Abstract:

● A 2D finite-element solute transport model, PRB-Trans, is developed.

Keywords： Passive convergence-permeable reactive barrier Numerical modeling Hydraulic behavior assessment Pollutant

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Passive convergence-permeable reactive barrier (PC-PRB): An effective configuration to enhance hydraulic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1591-y

Abstract:

● A novel PRB configuration based on passive convergent flow effect was proposed.

Keywords： Passive convergence-permeable reactive barrier (PC-PRB) Permeable reactive barrier configuration Numerical

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Reliability mesh convergence analysis by introducing expanded control variates

Alireza GHAVIDEL, Mohsen RASHKI, Hamed GHOHANI ARAB, Mehdi AZHDARY MOGHADDAM

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4, Pages 1012-1023 doi: 10.1007/s11709-020-0631-6

Abstract: ACVAT however does not provide any results about the reliability-based mesh convergence of the problemACVAT is improved and the capabilities of the method are also extended for efficient reliability mesh convergence

Keywords： finite element reliability mesh convergence analysis expanded control variates

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Convergence of OT and IT for Internet Plus

Hong Xuehai, Cai Di

Strategic Study of CAE 2020, Volume 22, Issue 4, Pages 18-23 doi: 10.15302/J-SSCAE-2020.04.015

Abstract:

The convergence of operational technology (OT) and information technologyThis study analyzes the demands for the convergence of OT and IT and summarizes the convergence statusIt also proposes the technical paths for OT and IT convergence, including establishing a full set ofChina’s Internet Plus initiative in industrial manufacturing, the standardization of OT and IT convergence

Keywords： Internet Plus operational technology information technology technology convergence

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A new type of quadratic acceleration method

Changqing LI, Menglin LOU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3, Pages 302-310 doi: 10.1007/s11709-010-0026-1

Abstract: The polynomial acceleration method for time history analysis is presented, in which accelerations between several equal neighboring time steps were assumed to be a polynomial function of time interval. With a higher order polynomial used, a higher accuracy can be obtained, but the stability field of the method becomes narrower. When stability field and computational accuracy are taken into account at the same time, the quadratic acceleration method is superior to linear and cubic acceleration methods in choosing the maximum acceptable time step size. It is also shown that the quadratic acceleration method has desirable arithmetic damp, amplitude decay rate and period elongation rate, though its conditional stability restricts its application in stiff structures.

Keywords： polynomial acceleration method convergence stability square acceleration method

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A frequency error estimation for isogeometric analysis of Kirchhoff–Love cylindrical shells

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0006-x

Abstract: Numerical results not only thoroughly verify the theoretical convergence rates of frequency solutions

Keywords： isogeometric analysis Kirchhoff–Love cylindrical shell free vibration frequency error convergence

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Robust energy-efficient train speed profile optimization in a scenario-based position–time–speed network

Frontiers of Engineering Management 2021, Volume 8, Issue 4, Pages 595-614 doi: 10.1007/s42524-021-0173-1

Abstract: Train speed profile optimization is an efficient approach to reducing energy consumption in urban railassume deterministic parameters as model inputs, this paper proposes a robust energy-efficient train speedSpecifically, we first construct a scenario-based position–time–speed (PTS) network by considering resistanceThen, a percentile reliability model is proposed to generate a robust train speed profile, by which theeffectiveness of the model and analyze the influences of parameter uncertainties on the generated train speed

Keywords： robust train speed profile percentile reliability model scenario-based position–time–speed network

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Value and governance of high-speed railway

Xiaoyan LIN, Zehua ZHANG, Meng WANG

Frontiers of Engineering Management 2017, Volume 4, Issue 4, Pages 463-482 doi: 10.15302/J-FEM-2017054

Abstract: This paper considers multiple perspectives to explore the concept of high-speed railway (HSR), rationallyThis paper analyzes the governance potential of major countries in the high-speed railway value chainand studies the feasible ways and development strategies to enhance the high-speed railway governanceSecond, the high-speed railway standard output has become the core competitiveness that embodies high-speedThird, the global high-speed railway market presents a hierarchical high-speed railway governance model

Keywords： high-speed railway value communication value high-speed railway value governance governance path upgrade

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CR-Fuxing high-speed EMU series

Frontiers of Engineering Management Pages 742-748 doi: 10.1007/s42524-023-0281-1

Abstract: CR-Fuxing high-speed EMU series

Keywords： CR-Fuxing series high-speed EMU innovation key system digitalized collaborative design engineering

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Exploration on Engineering Management Practice of China’s High Speed Railways

Yong-fu Sun

Frontiers of Engineering Management 2014, Volume 1, Issue 3, Pages 232-240 doi: 10.15302/J-FEM-2014043

Abstract: explores the principal motivations and successful experiences of the rapid development of China’s high speedUnder the overall coordination of the government, a high speed railway technology system has been formedThe target control system and support-guarantee system were established for the high speed railway projectcommissioning, conducting strict acceptance, and achieving construction management experiences on the high speed

Keywords： high speed railway engineering management practice innovation

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Multi-domain Knowledge Convergence Trajectory Analysis of Strategic Emerging Industries Based on Citation

Liu Yufei, Miao Zhongzhen, Li Lingfeng, Kong Dejing

Strategic Study of CAE 2020, Volume 22, Issue 2, Pages 120-129 doi: 10.15302/J-SSCAE-2020.02.016

Abstract:

The analysis of technology convergence process for strategic emergingTo identify the trajectory and degree of technology convergence of the strategic emerging industries,this study conducts a multi-case study on four fields which present a trend of convergence and attractis still insufficient, due to the late start of convergence.Numerical control equipment and biomedicine have not shown any trend of convergence.

Keywords： emerging industries knowledge convergence graph neural networks citation network topic model

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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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Technical studies on high-speed turnouts for china railways

He Huawu

Strategic Study of CAE 2009, Volume 11, Issue 5, Pages 23-30

Abstract:

High-speed turnout serves as a vital part of track structure for high-speedIn this paper, design parameters and linear plane of high-speed turnout, main structure characteristicsof components (including fastening, turnout sleeper, switching system etc.), design theories of high-speedoffer remarkable guiding significance for the further R&D, test, verification and wide-use of high-speed

Keywords： high-speed railway high-speed turnout technical studies

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WEIS wheel speed real-time measuring method for VOSM

Mengyao PAN, Guixiong LIU, Xiaobin HONG, Tusheng LIN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 322-327 doi: 10.1007/s11465-010-0022-0

Abstract: Wheel speed is one of the key parameters of vehicle operating attitude.To solve the problems in traditional wheel speed measuring methods, such as low measurement precisionmonitoring of the vehicle’s operating attitude, a wheel embedded intelligent sensors (WEIS) wheel speedThe experimental result shows that under experimental conditions the speed measurement error is −2.05%, and the speed measuring response time is 0.45 s.

Keywords： wheel embedded intelligent sensing wheel speed monitoring