Resource Type

Journal Article 16

Year

2022 3

2021 2

2019 2

2018 2

2017 1

2016 1

2014 1

2012 1

2007 2

2002 1

open ︾

Keywords

Adaptive dynamic programming 2

Policy iteration 2

Reinforcement learning 2

iteration 2

ANSYS-secondary-development 1

Angle-of-arrival (AOA) 1

Approximate dynamic programming 1

Compressed sensing 1

Decision making 1

Disjoint sources 1

Doppler spread 1

Experimental validation 1

Field measurement 1

Fixed-point iteration 1

Fixed-point iteration technique 1

Frequency-of-arrival (FOA) 1

Green strain 1

H∞ control 1

Input saturation 1

open ︾

Search scope:

排序: Display mode:

Iteration framework for solving mixed lubrication computation problems

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 635-648 doi: 10.1007/s11465-021-0632-8

Abstract: The general discrete scheme of time-varying Reynolds equation loses the information of the previous step, which makes it unreasonable. A discretization formula of the Reynolds equation, which is based on the Crank–Nicolson method, is proposed considering the physical message of the previous step. Gauss–Seidel relaxation and distribution relaxation are adopted for the linear operators of pressure during the numerical solution procedure. In addition to the convergent criteria of pressure distribution and load, an estimation framework is developed to investigate the relative error of the most important term in the Reynolds equation. Smooth surface with full contacts and mixed elastohydrodynamic lubrication is tested for validation. The asperity contact and sinusoidal wavy surface are examined by the proposed discrete scheme. Results show the precipitous decline in the boundary of the contact area. The relative error suggests that the pressure distribution is reliable and reflects the accuracy and effectiveness of the developed method.

Keywords: mixed lubrication     discretization formula     relative error     Reynolds equation     asperity    

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: engineering     mobile payment     engineering management method     Mobile QuickPass     national information security     rapid iteration    

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 directThrough the above two steps, the computational complexity of each iteration is reduced approximately

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

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: In 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.

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

Adaptive Optimization of Correlation-Interval for DopplerSpread Estimation and Its Iterative Implement

Zhang Peng,Bi Guangguo,Cao Xiuying,Yuan Xiaohui

Strategic Study of CAE 2007, Volume 9, Issue 6,   Pages 71-76

Abstract:

In this paper,  at first research of relation between correlation-interval and estimation accuracy is carried out,  and the optimal correlation-interval is proved to be existent that is adaptive to signal-to-noise ratio and velocity varieties. Then some special characteristics of the optimal correlation-interval are explored. Based on them an iterative correlation-interval optimized (CIO) algorithm is proposed.  It optimizes the correlation- interval and calculates the Doppler spread by increasing the resolution on time-domain iteratively.  Simulation results show that contrasted to conventional schemes the proposed approach is less sensitive to signal-to-noise ratio and velocity varieties,  and can improves the performance dramatically in low signal-to-noise ratio environment in which the conventional schemes has a poor performance. It achieves the high accurate estimation of Doppler spread directly.

Keywords: Doppler spread     autocorrelation     optimization     iteration    

Application of Wavelet Transform to Acoustic Radiation and Scattering

Wen Lihua,Ren Xingmin

Strategic Study of CAE 2002, Volume 4, Issue 8,   Pages 63-68

Abstract:

Traditional boundary element methods with a full matrix equation for acoustic problems, have been met by a challenge in large-scale scientific computation and numerical simulation in engineering. In this paper, the new wavelet approaches have been presented for solving acoustic radiation and scattering, and structural-acoustic coupling. The boundary quantities are expanded in terms of a basis of the orthogonal wavelets on the interval, and a wavelet spectral formulation for solving acoustic problems is derived. Then coupled wavelet spectral and finite element method is formulated for solving sound-structure interaction. The advantages of the new approaches include a highly sparse matrix system which can be solved rapidly by sparse solvers and accurate modeling of curve surface. In the new technique, the iterative technique of frequencies is established for evaluating frequency-response functions through expanding the integral kernel in Taylor series in integral equation. The new technique was employed to investigate the underwater acoustic radiation from a complicate structure which is composed of shells, stiffening ribs and plates. The comparisons of the results from the new technique with analytic solution show that it has high computational efficiency and good accuracy.

At the end of the paper, the prospects of the application of wavelet analysis to numerical computation in acoustic engineering are discussed.

Keywords: wavelet analysis     acoustic radiation and scattering     structural-acoustic coupling     frequency iteration    

A Train-Bridge Dynamic Interaction Analysis Method and Its Experimental Validation

Nan Zhang, Yuan Tian, He Xia

Engineering 2016, Volume 2, Issue 4,   Pages 528-536 doi: 10.1016/J.ENG.2016.04.012

Abstract: The train-bridge dynamic interaction system is solved by inter-history iteration.

Keywords: Train-bridge dynamic interaction     Wheel/rail relationship     Inter-history iteration     Field measurement     Experimental    

Joint compressed sensing imaging and phase adjustment via an iterative method for multistatic passive radar None

Jue WANG, Jun WANG

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 4,   Pages 557-568 doi: 10.1631/FITEE.1601423

Abstract: minimizing the mean recovery error of the reconstructed image based on the principle of fixed-point iteration

Keywords: Multistatic passive radar     Compressed sensing     Phase adjustment     Fixed-point iteration technique    

Research on analysis method of suspension bridge based on ANSYS

Xie Xuefeng and Luo Xiheng

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 101-105

Abstract:

Special programs and general programs applied to suspension bridge analysis have their limitations. This paper focuses on ANSYS-secondary-development and makes it possible to analyze suspension bridges both with accuracy of special programs and convenience of general programs. This paper is dedicated to saddle simulation,incremental launching realization and how to obtain unstressed length of main cable and slings and how to keep it unchanged. In the end, the method is verified through finite element model in Runyang Yangtze River Bridge.

Keywords: suspension bridge     ANSYS-secondary-development     saddle     incremental launching     unstressed length     iteration    

A novel multiple-outlier-robust Kalman filter Research Articles

Yulong HUANG, Mingming BAI, Yonggang ZHANG,heuedu@163.com,mingming.bai@hrbeu.edu.cn,zhangyg@hrbeu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 422-437 doi: 10.1631/FITEE.2000642

Abstract: This paper presents a novel multiple-outlier-robust Kalman filter (MORKF) for linear stochastic discrete-time systems. A new is first proposed to evaluate the similarity between two random vectors from dimension to dimension. Then, the proposed MORKF is derived via maximizing a based cost function. The MORKF guarantees the convergence of iterations in mild conditions, and the boundedness of the approximation errors is analyzed theoretically. The selection strategy for the similarity function and comparisons with existing robust methods are presented. Simulation results show the advantages of the proposed filter.

Keywords: Kalman filtering     Multiple statistical similarity measure     Multiple outliers     Fixed-point iteration    

Motion planning of a quadrotor robot game using a simulation-based projected policy iteration method Regular Papers

Li-dong ZHANG, Ban WANG, Zhi-xiang LIU, You-min ZHANG, Jian-liang AI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 525-537 doi: 10.1631/FITEE.1800571

Abstract: the threedimensional space and an approximate dynamic programming approach using a projected policy iteration

Keywords: Reinforcement learning     Approximate dynamic programming     Decision making     Motion planning     Unmanned aerial vehicle    

The Study on Steady Flow and Transient Flow Mathematical Models for City’s Water Distribution Pipeline Network

Wang Shoudong,Shen Yongming,Jiang Hengzhi

Strategic Study of CAE 2007, Volume 9, Issue 12,   Pages 26-30

Abstract: distribution pipeline network steady flow mathematical model is established and is solved by using the Newton iteration

Keywords: water distribution pipeline network     steady flow     transient flow     water hammer     Newton’s iteration method    

Dynamic value iteration networks for the planning of rapidly changing UAV swarms Research Articles

Wei Li, Bowei Yang, Guanghua Song, Xiaohong Jiang,li2ui2@zju.edu.cn,boweiy@zju.edu.cn,ghsong@zju.edu.cn,jiangxh@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5,   Pages 615-766 doi: 10.1631/FITEE.1900712

Abstract: In this study, for planning rapidly changing UAV swarms, we propose a dynamic value iteration network

Keywords: 动态值迭代网络;场景式Q学习;无人机自组网;NSGA-II;路径规划    

Minimax Q-learning design for H control of linear discrete-time systems Research Articles

Xinxing LI, Lele XI, Wenzhong ZHA, Zhihong PENG,lixinxing_1006@163.com,xilele.bit@gmail.com,zhawenzhong@126.com,peng@bit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 438-451 doi: 10.1631/FITEE.2000446

Abstract: The method is an effective approach for attenuating the effect of disturbances on practical systems, but it is difficult to obtain the ler due to the nonlinear Hamilton–Jacobi–Isaacs equation, even for linear systems. This study deals with the design of an ler for linear discrete-time systems. To solve the related game algebraic Riccati equation (GARE), a novel model-free method is developed, on the basis of an offline algorithm, which is shown to be Newton’s method for solving the GARE. The proposed method, which employs off-policy , learns the optimal control policies for the controller and the disturbance online, using only the state samples generated by the implemented behavior policies. Different from existing -learning methods, a novel gradient-based policy improvement scheme is proposed. We prove that the method converges to the saddle solution under initially admissible control policies and an appropriate positive learning rate, provided that certain persistence of excitation (PE) conditions are satisfied. In addition, the PE conditions can be easily met by choosing appropriate behavior policies containing certain excitation noises, without causing any excitation noise bias. In the simulation study, we apply the proposed method to design an load-frequency controller for an electrical power system generator that suffers from load disturbance, and the simulation results indicate that the obtained load-frequency controller has good disturbance rejection performance.

Keywords: Zero-sum dynamic game     Reinforcement learning     Adaptive dynamic programming     Minimax Q-learning     Policy iteration    

Structural total least squares algorithm for locating multiple disjoint sources based on AOA/TOA/FOA in the presence of system error None

Xin CHEN, Ding WANG, Rui-rui LIU, Jie-xin YIN, Ying WU

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 7,   Pages 917-936 doi: 10.1631/FITEE.1700735

Abstract: Based on this, a structural total least squares (STLS) optimization model is developed and the inverse iteration

Keywords: Single-station     Structural total least squares     Inverse iteration     Angle-of-arrival (AOA)     Time-of-arrival    

Title Author Date Type Operation

Iteration framework for solving mixed lubrication computation problems

Journal Article

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

Yongkai ZHOU, Hongfeng CHAI

Journal Article

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

Jian LIU,Yuxue CHEN,Zhenzhi HE,Shunian YANG

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

Adaptive Optimization of Correlation-Interval for DopplerSpread Estimation and Its Iterative Implement

Zhang Peng,Bi Guangguo,Cao Xiuying,Yuan Xiaohui

Journal Article

Application of Wavelet Transform to Acoustic Radiation and Scattering

Wen Lihua,Ren Xingmin

Journal Article

A Train-Bridge Dynamic Interaction Analysis Method and Its Experimental Validation

Nan Zhang, Yuan Tian, He Xia

Journal Article

Joint compressed sensing imaging and phase adjustment via an iterative method for multistatic passive radar

Jue WANG, Jun WANG

Journal Article

Research on analysis method of suspension bridge based on ANSYS

Xie Xuefeng and Luo Xiheng

Journal Article

A novel multiple-outlier-robust Kalman filter

Yulong HUANG, Mingming BAI, Yonggang ZHANG,heuedu@163.com,mingming.bai@hrbeu.edu.cn,zhangyg@hrbeu.edu.cn

Journal Article

Motion planning of a quadrotor robot game using a simulation-based projected policy iteration method

Li-dong ZHANG, Ban WANG, Zhi-xiang LIU, You-min ZHANG, Jian-liang AI

Journal Article

The Study on Steady Flow and Transient Flow Mathematical Models for City’s Water Distribution Pipeline Network

Wang Shoudong,Shen Yongming,Jiang Hengzhi

Journal Article

Dynamic value iteration networks for the planning of rapidly changing UAV swarms

Wei Li, Bowei Yang, Guanghua Song, Xiaohong Jiang,li2ui2@zju.edu.cn,boweiy@zju.edu.cn,ghsong@zju.edu.cn,jiangxh@zju.edu.cn

Journal Article

Minimax Q-learning design for H control of linear discrete-time systems

Xinxing LI, Lele XI, Wenzhong ZHA, Zhihong PENG,lixinxing_1006@163.com,xilele.bit@gmail.com,zhawenzhong@126.com,peng@bit.edu.cn

Journal Article

Structural total least squares algorithm for locating multiple disjoint sources based on AOA/TOA/FOA in the presence of system error

Xin CHEN, Ding WANG, Rui-rui LIU, Jie-xin YIN, Ying WU

Journal Article