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Key technology research on construction for the middle tower of suspension bridge

Tian Wei,Liu Jianbo and You Xinpeng

Strategic Study of CAE 2012, Volume 14, Issue 5, Pages 23-28

Abstract: Meanwhile，control measure is used to prevent caisson sinking suddenly and extra-sinking in final stageTo the feature, the method of whole process control based on geometric control is used in the projectThe final accuracy of erection is better than that designed.

Keywords： Taizhou Bridge anchor pier positioning real time monitoring control measure in final stage whole processcontrol erection accuracy

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Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4, Pages 421-425 doi: 10.1007/s11465-008-0063-9

Abstract: Using an appropriate control method, linear ultrasonic motors can be used in applications requiring highIn this paper, a closed loop PI control system is designed to achieve high position accuracy during thecontrol of a two-DOF stage driven by linear ultrasonic motors.Two ultrasonic motors are mounted on the stage to generate motion in two orthogonal directions.The PI control algorithm is used to increase the stability and accuracy of position control.

Keywords： settling position accuracy PI control control algorithm orthogonal

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Improved resilience measure for component recovery priority in power grids

Frontiers of Engineering Management 2021, Volume 8, Issue 4, Pages 545-556 doi: 10.1007/s42524-021-0161-5

Abstract: Considering the severity of power grid disasters, an improved power grid resilience measure and its corresponding

Keywords： resilience measure power grid importance measure component recovery

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2019 novel coronavirus outbreak: a quiz or final exam?

Jiuyang Xu, Yijun Chen, Hao Chen, Bin Cao

Frontiers of Medicine 2020, Volume 14, Issue 2, Pages 225-228 doi: 10.1007/s11684-020-0753-1

Abstract: The 2019 novel coronavirus (2019-nCoV) is an emerging pathogen and is threatening the global health. Strikingly, more than 28 000 cases and 550 deaths have been reported within two months from disease emergence. Armed with experience from previous epidemics in the last two decades, clinicians, scientists, officials, and citizens in China are all contributing to the prevention of further 2019-nCoV transmission. Efficient preliminary work has enabled us to understand the basic characteristics of 2019-nCoV, but there are still many unanswered questions. It is too early now to judge our performance in this outbreak. Continuous and strengthened efforts should be made not only during the epidemic, but also afterwards in order to prepare for any incoming challenges.

Keywords： 2019-nCoV novel coronavirus epidemic public response

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Efficiency evaluation of government investment for air pollution control in city clusters: A case from

Frontiers of Engineering Management Pages 612-624 doi: 10.1007/s42524-023-0269-x

Abstract: the government plays a crucial role in managing air quality through the Air Pollution Prevention and ControlTo address this concern, we conducted a study using a three-stage data envelopment analysis (DEA)-Malmquist

Keywords： investment efficiency government investment air pollution control three-stage DEA-Malmquist model

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High-bandwidth nanopositioning via active control of system resonance

Linlin LI, Sumeet S. APHALE, Limin ZHU

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2, Pages 331-339 doi: 10.1007/s11465-020-0619-x

Abstract: To overcome this issue, a variety of open- and closed-loop control techniques that commonly combine dampingThe integral resonant control (IRC) has been reported earlier to demonstrate the significant performanceThe IRC damping control is augmented with a standard integral tracking controller to improve positioningAnd both damping and tracking control parameters are analytically optimized to result in a Butterworth

Keywords： nanopositioning stage high-bandwidth resonant mode control tracking control integral resonant control

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Mass concentrations and temporal profiles of PM

Liu YANG,Ye WU,Jiaqi LI,Shaojie SONG,Xuan ZHENG,Jiming HAO

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4, Pages 675-684 doi: 10.1007/s11783-014-0731-4

Abstract: Since the control efforts for motor vehicles helped offset the increase of emissions from the rapid growthWith the implementation of temporary traffic control measures during the Olympics, a clear “V” shaped

Keywords： particulate matter traffic control measure Beijing Olympic Games

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Robust ensemble of metamodels based on the hybrid error measure

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3, Pages 623-634 doi: 10.1007/s11465-021-0641-7

Abstract: Metamodels have been widely used as an alternative for expensive physical experiments or complex, time-consuming computational simulations to provide a fast but accurate analysis. However, challenge remains in the prior determination of the most suitable metamodel for a particular case because of the lack of information about the actual behavior of a system. In addition, existing studies on metamodels have largely restricted on solving deterministic problems (e.g., data from finite element models), whereas some real-life engineering problems (e.g., data from physical experiment) are stochastic problems with noisy data. In this work, a robust ensemble of metamodels (EMs) is proposed by combining three regression stand-alone metamodels in a weighted sum form. The weight factor is adaptively determined according to the hybrid error metric, which combines global and local error measures to improve the accuracy of the EMs. Furthermore, three typical individual metamodels that can filter noise are selected to construct the EMs to extend their application in practical engineering problems. Three well-known benchmark problems with different levels of noise and three engineering problems are used to verify the effectiveness of the proposed EMs. Results show that the proposed EMs have higher accuracy and robustness than the individual metamodels and other typical EMs in major cases.

Keywords： metamodel ensemble of metamodels hybrid error measure stochastic problem

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Sutong Bridge--construction and control technology of the superstructure

Zhang Hong,Luo Chenbin,Zhang Yongtao,You Xinpeng

Strategic Study of CAE 2009, Volume 11, Issue 3, Pages 85-91

Abstract: Pushing assistant method was adopted in middle span closure construction.An all-stage self adaptive geometrycontrol method was used in the construction process.that control system and controlled system adapt to each other, the goal to make the final line shapeand inner force of bridge structure under control could be achieved.including based GPS and based total station dynamic geometry monitoring systems were used to resolve the measure

Keywords： Sutong Bridge superstructure construction method construction control geometry control wind-resistantmeasure

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Search for a natural scientific measure of economy

John E COULTER

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1, Pages 111-118 doi: 10.1007/s11783-011-0285-7

Abstract: 1950s, is being researched, developed, and applied, especially in China, driven by the desperation to measure

Keywords： climate change financial crisis energy exergy environment

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Subspace transform induced robust similarity measure for facial images

Jian Zhang, Heng Zhang, Li-ling Bo, Hong-ran Li, Shuai Xu, Dong-qing Yuan,zhangjian@jou.edu.cn,zhangheng@jou.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 9, Pages 1267-1412 doi: 10.1631/FITEE.1900552

Abstract: Similarity measure has long played a critical role and attracted great interest in various areas suchNevertheless, there remains the issue of developing an efficient two-dimensional (2D) robust similarity measurethe properties of subspace, we develop an effective 2D technique, named transformation similarity measureWe present the mathematical features and some odds to reveal the feasible and robust measure mechanism

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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.For each test curve, the speeds of the two stage turbochargers were adjusted to the fixed data, and amany differences between the corrected mass flow and the actual mass flow of the high pressure (HP) stageThe 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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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-stage

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

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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: This study proposes a data-driven, mixed two-stage network data envelopment analysis model.allocation portion of shared extra intermediate resources among several nonhomogeneous subsystems and measure

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

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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 mechanismsmodified 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