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High-order phase-field model with the local and second-order max-entropy approximants

Fatemeh AMIRI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 406-416 doi: 10.1007/s11709-018-0475-5

Abstract: surface energy functional based on phase-field method with smooth local maximum entropy (LME) and second-orderThe higher-order continuity of the meshfree methods such as LME and SME approximants allows to directlysolve the fourth-order phase-field equations without splitting the fourth-order differential equationinto two second-order differential equations.The proposed meshfree fourth-order phase-field formulation show more stable results for SME compared

Keywords： second-order maximum entropy     local maximum entropy     second- and fourth-order phase-field models     B-spline    

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High-order moment methods for LRFD including random variables with unknown probability distributions

Zhao-Hui LU, Yan-Gang ZHAO, Zhi-Wu YU

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 288-295 doi: 10.1007/s11709-013-0210-1

Abstract: In this paper, the high-order moment methods for LRFD including random variables with unknown probabilityneither the iterative computation of derivatives nor any design points; 3) In the applicable range of the high-orderand resistance factors obtained by the proposed method may be different from those obtained by first order

Keywords： high-order moment methods     applicable range     load and resistance factors     target mean resistance    

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Uncertainty propagation analysis by an extended sparse grid technique

X. Y. JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1,   Pages 33-46 doi: 10.1007/s11465-018-0514-x

Abstract: sparse grid technique and maximum entropy principle, aiming at improving the solving accuracy of the high-ordermoments and hence the fitting accuracy of the probability density function (PDF) of the system responseSubsequently, within the sparse grid numerical integration framework, the statistical moments of theFurthermore, based on the maximum entropy principle, the obtained first four-order statistical moments

Keywords： extended sparse grid     maximum entropy principle     extended Gauss integration     Rosenblatt transformation     high-ordermoments analysis    

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An Intelligent Non-Collocated Control Strategy for Ball-Screw Feed Drives with Dynamic Variations

Hui Liu, Jun Zhang, Wanhua Zhao

Engineering 2017, Volume 3, Issue 5,   Pages 641-647 doi: 10.1016/J.ENG.2017.04.007

Abstract:

The ball-screw feed drive has varying high-order dynamic characteristics due to flexibilities of thenetwork (ANN) as a smooth parameter interpolator updates the parameters of the filters in real time in order

Keywords： Ball-screw feed drives     Varying high-order dynamics     Non-collocated control     Modal characteristic modifier    

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Adaptive tracking control of high-order MIMO nonlinear systems with prescribed performance Research Articles

Xuerao Wang, Qingling Wang, Changyin Sun,wangxuerao@seu.edu.cn,qlwang@seu.edu.cn,cysun@seu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 7,   Pages 986-1001 doi: 10.1631/FITEE.2000145

Abstract: In this paper, an observer-based adaptive tracking control scheme is developed for a class of uncertain multi-input multi-output nonlinear systems with or without . A novel finite-time is constructed to estimate the system uncertainties and external disturbances. To guarantee the , an error transformation is applied to transfer the time-varying constraints into a constant constraint. Then, by employing a barrier Lyapunov function and the backstepping technique, an observer-based tracking control strategy is presented. It is proven that using the proposed algorithm, all the closed-loop signals are bounded, and the tracking errors satisfy the predefined time-varying performance requirements. Finally, simulation results on a quadrotor system are given to illustrate the effectiveness of the proposed control scheme.

Keywords： 自适应跟踪控制；预设性能；输入饱和；干扰观测器；神经网络    

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High Order Differential Feedback Control for Nonlinear Systems

Qi Guoyuan,Chen Zengqiang,Yuan Zhuzhi

Strategic Study of CAE 2003, Volume 5, Issue 8,   Pages 35-44

Abstract:

This article presents high differential feedback control idea that does not rely on the model of thethe given reference input and its differential and high order differentials.Based on the idea, the high order differentiator (HOD) that is well able to extract differential andhigh order differentials of measured signals is designed.Furthermore, is designed, high order differential feedback adaptive controllers (HODFC) for unknown model

Keywords： high order differentiator     high differential feedback controller     stability     robustness     decoupling control    

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Multiscale RBF-based central high resolution schemes for simulation of generalized thermoelasticity problems

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 429-455 doi: 10.1007/s11709-018-0483-5

Abstract: study, average-interpolating radial basis functions (RBFs) are successfully integrated with central high-resolutionschemes to achieve a higher-order central method.In the central high resolution formulation, RBFs lead to a reconstruction with the optimum recovery withthe adaptive RBF-based formulation is compared with that of the adaptive Kurganov-Tadmor (KT) second-ordercentral high-resolution scheme with the total variation diminishing (TVD) property.

Keywords： central high resolution schemes     RBFs     higher order accuracy     generalized thermoelasticity     multiresolution-based    

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Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0961-2

Abstract: Deep excavations in dense urban areas have caused damage to nearby existing structures in numerous past construction cases. Proper assessment is crucial in the initial design stages. This study develops equations to predict the existing pile bending moment and deflection produced by adjacent braced excavations. Influential parameters (i.e., the excavation geometry, diaphragm wall thickness, pile geometry, strength and small-strain stiffness of the soil, and soft clay thickness) were considered and employed in the developed equations. It is practically unfeasible to obtain measurement data; hence, artificial data for the bending moment and deflection of existing piles were produced from well-calibrated numerical analyses of hypothetical cases, using the three-dimensional finite element method. The developed equations were established through a multiple linear regression analysis of the artificial data, using the transformation technique. In addition, the three-dimensional nature of the excavation work was characterized by considering the excavation corner effect, using the plane strain ratio parameter. The estimation results of the developed equations can provide satisfactory pile bending moment and deflection data and are more accurate than those found in previous studies.

Keywords： pile responses     excavation     prediction     deflection     bending moments    

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An assemble-to-order production planning with the integration of order scheduling and mixed-model sequencing

Baoxi WANG, Zailin GUAN, Yarong CHEN, Xinyu SHAO, Ming JIN, Chaoyong ZHANG

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 137-145 doi: 10.1007/s11465-013-0251-0

Abstract:

For assemble-to-order enterprises, both order scheduling and mixed-model sequencing need to be takeninto consideration in the formulation of order-oriented assembly plan.for the received orders, and then conducting assembly sequence to the mixed-model products in each orderOrder scheduling is aimed to ensure order delivery with the optimization goal of minimal total overduesequencing is aimed to minimize the makespan so as to meet the requirement on completion time of the order

Keywords： mixed-model assembly line     assemble-to-order     order scheduling     sequencing    

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Split-order consolidation optimization for online supermarkets: Process analysis and optimization models

Frontiers of Engineering Management   Pages 499-516 doi: 10.1007/s42524-022-0221-5

Abstract: having large amounts of daily orders with potentially multiple items, diverse delivery times, and a highorder-split rate.Multiple shipments for one order caused by order splitting result in high cost and disturbance and aAccordingly, research on split-order consolidation fulfilment is critical for the advancement of theThis work highlights the effect of order consolidation processes and fulfilment methods on the order

Keywords： online supermarkets     split-order consolidation     time–space network     genetic algorithm    

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Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 320-324 doi: 10.1007/s11783-009-0030-7

Abstract: equations of linear and non-linear forms of the two widely used kinetic models, namely pseudo-first-orderand pseudo-second-order equations, were compared in this study.The results show that the non-linear forms of pseudo-first-order and pseudo-second-order models were

Keywords： adsorption     pseudo-first order     pseudo-second order     kinetic model     linear method     non-linear method    

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Higher-order mode effects on the seismic performance of tall piers

Zhongguo GUAN, Jianzhong LI, Yan XU, Hao LU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4,   Pages 496-502 doi: 10.1007/s11709-011-0131-9

Abstract: The effect of higher-order modes was studied specifically.The results showed that higher-order modes significantly contributed to the structural seismic responseHigher-order modes also led to an out-of-phase response between the hinge rotation at the pier bottom

Keywords： tall bridges     higher-order mode effects     incremental dynamic analysis    

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Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 202-206 doi: 10.1007/s11708-007-0026-6

Abstract: A two-scale second-order moment particle turbulence model is developed, based on the concept of particleresults are compared with the experimental results and with those obtained by the single-scale second-order

Keywords： gas-particle     single-scale second-order     large-scale fluctuation     second-order     sudden-expansion    

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Tacholess order-tracking approach for wind turbine gearbox fault detection

Yi WANG, Yong XIE, Guanghua XU, Sicong ZHANG, Chenggang HOU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 427-439 doi: 10.1007/s11465-017-0452-z

Abstract: Although order-tracking methods have been proposed for wind turbine fault detection in recent years,In this study, a tacholess order-tracking method for wind turbines is proposed to overcome the limitationsphase from the vibration signal, resamples the signal at equiangular increments, and calculates the order

Keywords： wind turbine     variable-speed operating conditions     Vold-Kalman filtering     tacholess order tracking    

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Title Author Date Type Operation

High-order phase-field model with the local and second-order max-entropy approximants

Fatemeh AMIRI

Journal Article

High-order moment methods for LRFD including random variables with unknown probability distributions

Zhao-Hui LU, Yan-Gang ZHAO, Zhi-Wu YU

Journal Article

Uncertainty propagation analysis by an extended sparse grid technique

X. Y. JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Journal Article

An Intelligent Non-Collocated Control Strategy for Ball-Screw Feed Drives with Dynamic Variations

Hui Liu, Jun Zhang, Wanhua Zhao

Journal Article

Adaptive tracking control of high-order MIMO nonlinear systems with prescribed performance

Xuerao Wang, Qingling Wang, Changyin Sun,wangxuerao@seu.edu.cn,qlwang@seu.edu.cn,cysun@seu.edu.cn

Journal Article

Xingyu: New Findings in the Interplay between Carbon and Energy Markets during EU ETS Phase |||: Higher-OrderMoments and Timescales (2020-7-12)

10 Jun 2022

Conference Videos

High Order Differential Feedback Control for Nonlinear Systems

Qi Guoyuan,Chen Zengqiang,Yuan Zhuzhi

Journal Article

Multiscale RBF-based central high resolution schemes for simulation of generalized thermoelasticity problems

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI

Journal Article

Improved prediction of pile bending moment and deflection due to adjacent braced excavation

Journal Article

An assemble-to-order production planning with the integration of order scheduling and mixed-model sequencing

Baoxi WANG, Zailin GUAN, Yarong CHEN, Xinyu SHAO, Ming JIN, Chaoyong ZHANG

Journal Article

Split-order consolidation optimization for online supermarkets: Process analysis and optimization models

Journal Article

Comparison between linear and non-linear forms of pseudo-first-order and pseudo-second-order adsorption

Junxiong LIN , Lan WANG ,

Journal Article

Higher-order mode effects on the seismic performance of tall piers

Zhongguo GUAN, Jianzhong LI, Yan XU, Hao LU

Journal Article

Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Journal Article

Tacholess order-tracking approach for wind turbine gearbox fault detection

Yi WANG, Yong XIE, Guanghua XU, Sicong ZHANG, Chenggang HOU

Journal Article