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A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication problems

Jian LIU,Yuxue CHEN,Zhenzhi HE,Shunian YANG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 156-167 doi: 10.1007/s11465-014-0297-7

Abstract: First, by introducing a special matrix splitting iteration method into the traditional compound directiterative method, the full matrices for the linear systems of equations are transformed into sparsebanded ones with any half-bandwidth; then, an extended Thomas method which can solve banded linear systemsThrough the above two steps, the computational complexity of each iteration is reduced approximatelyalgorithm increases computing speed several times more than the traditional compound direct iterative method

Keywords： elastohydrodynamic lubrication     transient     line contact     matrix splitting iteration method     the Thomas method    

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numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness matrix

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 10-24 doi: 10.1007/s11709-022-0904-3

Abstract: The free-field responses are first obtained using the stiffness matrix method based on plane-wave assumptionsThen, the domain reduction method was employed to reproduce the wavefield in the numerical model of the

Keywords： underground structures     seismic response     stiffness matrix method     domain reduction method     P-SV waves    

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Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1036-1053 doi: 10.1007/s11709-019-0535-5

Abstract: Numerical manifold method (NMM) is an effective method for simulating block system, however, significantIn this method, the governing equation is derived using Green strain, the large deformation iterationand the open-close iteration are combined, and an updating strategy is proposed.The proposed method is used to analyze block rotation, beam bending, and rock falling problems and theresults prove that all three kinds of errors are eliminated in this method.

Keywords： numerical manifold method     rotation     large deformation     Green strain     open-close iteration    

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A dynamic model of mobile concrete pump boom based on discrete time transfer matrix method

Wu REN, Yunxin WU, Zhaowei ZHANG

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 360-366 doi: 10.1007/s11465-013-0280-8

Abstract: A dynamics model of a mobile concrete pump boom is established based on discrete time transfer matrixmethod (DTTMM).The overall dynamic equation and transfer matrix of the model can be assembled by sub-structures A andThe displacement and rotation angle curves of the proposed method fit well with the ADAMS model.

Keywords： multi-body     mobile concrete pump boom     discrete time transfer matrix method (DTTMM)     kinematic     dynamic     tip    

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Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 289-299 doi: 10.1007/s11465-009-0064-3

Abstract: The paper proposes an identification method of the dynamic stiffness matrix of a bearing joint regionThe author deduces an identification model of the dynamic stiffness matrix from the synthetic substructuremethod.The dynamic stiffness matrix of the bearing joint region can be identified by measuring the matrix ofagrees with experimental results, and there is very high reliability in the identified dynamic stiffness matrix

Keywords： frequency response function (FRFs)     dynamic stiffness     finite element     synthetic substructure method     joint    

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Research and practice on system engineering management of a mobile payment project

Yongkai ZHOU, Hongfeng CHAI

Frontiers of Engineering Management 2017, Volume 4, Issue 2,   Pages 127-137 doi: 10.15302/J-FEM-2017011

Abstract: The popularization of the mobile internet has given rise to demand for flexible and convenient payment methods. For China, it is necessary to keep pace with or even lead the trend of innovation and development in the age of mobile payment. From the perspective of systems engineering, this paper introduces research and implementation of China UnionPay’s mobile payment project. The general requirements and core engineering problems of the mobile payment project are summarized based on analyses of the characteristics and engineering difficulties of this project. Integration of innovative technologies is introduced to resolve the contradiction between ease-of-use and security. A rapid iterative development process is adopted to improve the product release efficiency as well as the users' experience. The launch of the mobile payment project also opens the window to coordinating and upgrading the whole payment industry chains.

Keywords： systems engineering     mobile payment     engineering management method     Mobile QuickPass     national informationsecurity     rapid iteration process     financial security     coordination and cooperation    

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Risk Matrix Method and Its Application in the Field of Technical Project Risk Management

Zhu Qichao,Kuang Xinghua,Shen Yongping

Strategic Study of CAE 2003, Volume 5, Issue 1,   Pages 89-94

Abstract: This paper systematically introduces risk matrix and its application, which is one of the most popularAs a conclusion, this paper evaluates the usability of risk matrix when to be used to assess and mitigatetechnical project risks in China, and delivers a framework of risk matrix application in high-tech project

Keywords： risk matrix     risk management     project management    

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Generation of enhanced stability of SnO/In(OH)/InP for photocatalytic water splitting by SnO protection

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 710-720 doi: 10.1007/s11708-021-0764-x

Abstract: InP shows a very high efficiency for solar light to electricity conversion in solar cell and may present an expectation property in photocatalytic hydrogen evolution. However, it suffers serious corrosion in water dispersion. In this paper, it is demonstrated that the stability and activity of the InP-based catalyst are effectively enhanced by applying an anti-corrosion SnO layer and In(OH)3 transition layer, which reduces the crystal mismatch between SnO and InP and increases charge transfer. The obtained Pt/SnO/In(OH)3/InP exhibits a hydrogen production rate of 144.42 µmol/g in 3 h under visible light illumination in multi-cycle tests without remarkable decay, 123 times higher than that of naked In(OH)3/InP without any electron donor under visible irradiation.

Keywords： SnO/In(OH)3/InP photocatalyst     enhanced activity and stability for water splitting     corrosion    

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Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires

Frontiers in Energy doi: 10.1007/s11708-023-0870-z

Abstract: Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires

Keywords： threshold solar water     splitting hydrogen III    

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An overview and recent advances in electrocatalysts for direct seawater splitting

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1408-1426 doi: 10.1007/s11705-021-2102-6

Abstract: The direct seawater splitting is economical and eco-friendly, but the key challenges in seawater, especiallyThe development of earth-abundant electrocatalysts toward direct seawater splitting has emerged as aelectrolysis and then focuses on the strategies for rational design of electrocatalysts toward direct seawater splittingof improved electrocatalysts to solve emerging challenges and further development of direct seawater splitting

Keywords： seawater splitting     electrocatalysts     oxygen evolution reaction     hydrogen evolution reaction     chlorine    

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a novel perforated ultrasonic vibration platform in the grinding of particulate-reinforced titanium matrix

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0730-2

Abstract: A modified apparent elasticity method (AEM) was proposed to reveal the influence of holes on the vibrationplatform was evaluated by the vibration tests and UVAG experiments of particulate-reinforced titanium matrixThe modified AEM, the finite element method, and the vibration tests show a high degree of consistency

Keywords： grinding     perforated ultrasonic vibration platform     vibration characteristics     apparent elasticity method    

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Acoustic emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete

Frontiers of Structural and Civil Engineering   Pages 1341-1356 doi: 10.1007/s11709-023-0988-4

Abstract: This study empirically investigated the influence of freeze–thaw cycling on the dynamic splitting tensileBrazilian disc splitting tests were conducted using four loading rates (0.002, 0.02, 0.2, and 2 mm/s)The dynamic splitting tensile damage characteristics were evaluated using acoustic emission (AE) parameter

Keywords： steel fiber reinforced concrete     freeze–thaw cycling     Brazilian disc splitting test     acoustic emissiontechnique     dynamic splitting tensile acoustic emission properties    

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The Mathematics Model and Matrix Method of Complex Cocurrent Multi-Effect Evaporation

Ruan Qi,Chen Wenbo,Huang Shihuang,Ye Changshen

Strategic Study of CAE 2001, Volume 3, Issue 4,   Pages 36-41

Abstract: A new algorithm (iteration method combining with matrix method) is presented.new algorithm is which increases the convergent speed and stability, more efficient than the Newton methodand Broyden method.

Keywords： condensed water flash     extra vapor elicitation     cocurrent     multi-effect evaporation     mathematics model     matrixmethod    

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Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1210-8

Abstract: Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy, a powerful tool for

Keywords： excitation-emission matrix (EEM)     dissolved organic matter (DOM)     membrane bioreactor (MBR)     fluorescenceindicator     characterization method    

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Matrix-valued distributed stochastic optimization with constraints

夏子聪,刘洋,卢文联,桂卫华

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1239-1252 doi: 10.1631/FITEE.2200381

Abstract: In this paper, we address matrix-valued distributed stochastic optimization with inequality and equalityconstraints, where the objective function is a sum of multiple matrix-valued functions with stochasticA penalty method is derived to deal with the constraints, and a selection principle is proposed for choosing

Keywords： Distributed optimization     Matrix-valued optimization     Stochastic optimization     Penalty method     Gossip model    

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Title Author Date Type Operation

A fast compound direct iterative algorithm for solving transient line contact elastohydrodynamic lubrication problems

Jian LIU,Yuxue CHEN,Zhenzhi HE,Shunian YANG

Journal Article

numerical framework for underground structures in layered ground under inclined P-SV waves using stiffness matrix

Journal Article

Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

Journal Article

A dynamic model of mobile concrete pump boom based on discrete time transfer matrix method

Wu REN, Yunxin WU, Zhaowei ZHANG

Journal Article

Identification of dynamic stiffness matrix of bearing joint region

Feng HU, Bo WU, Youmin HU, Tielin SHI

Journal Article

Research and practice on system engineering management of a mobile payment project

Yongkai ZHOU, Hongfeng CHAI

Journal Article

Risk Matrix Method and Its Application in the Field of Technical Project Risk Management

Zhu Qichao,Kuang Xinghua,Shen Yongping

Journal Article

Generation of enhanced stability of SnO/In(OH)/InP for photocatalytic water splitting by SnO protection

Journal Article

Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires

Journal Article

An overview and recent advances in electrocatalysts for direct seawater splitting

Journal Article

a novel perforated ultrasonic vibration platform in the grinding of particulate-reinforced titanium matrix

Journal Article

Acoustic emissions evaluation of the dynamic splitting tensile properties of steel fiber reinforced concrete

Journal Article

The Mathematics Model and Matrix Method of Complex Cocurrent Multi-Effect Evaporation

Ruan Qi,Chen Wenbo,Huang Shihuang,Ye Changshen

Journal Article

Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in

Jinlan Yu, Kang Xiao, Wenchao Xue, Yue-xiao Shen, Jihua Tan, Shuai Liang, Yanfen Wang, Xia Huang

Journal Article

Matrix-valued distributed stochastic optimization with constraints

夏子聪,刘洋,卢文联,桂卫华

Journal Article