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synchronization of coupled reaction-diffusion neural networks with mixed delays

Complexity 2016年第S2期21卷

作者： Ping He Yangmin Li Department of Electromechanical Engineering Faculty of Science and Technology University of Macau Taipa Macao Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China

The reaction-diffusion neural network is often described by semilinear diffusion partial differential equation (PDE). This article focuses on the asymptotical synchronization and synchronization for coupled reaction-diffusion neural networks with mixed delays (that is, discrete and infinite distributed delays) and Dirichlet boundary condition. First, using the Lyapunov–Krasoviskii functional scheme, the sufficient condition is obtained for the asymptotical synchronization of coupled semilinear diffusion PDEs with mixed time-delays and this condition is represented by linear matrix inequalities (LMIs), which is easy to be solved. Then the robust synchronization is considered in temporal-spatial domain for the coupled semilinear diffusion PDEs with mixed delays and external disturbances. In terms of the technique of completing squares, the sufficient condition is obtained for the robust synchronization. Finally, a numerical example of coupled semilinear diffusion PDEs with mixed time-delays is given to illustrate the correctness of the obtained results. © 2016 Wiley Periodicals, Inc. Complexity 21: 42–53, 2016

关键词： asymptotical synchronization synchronization coupled reaction-diffusion neural networks linear matrix inequality (LMI) partial differential systems (PDSs) mixed delays

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Research of the crack propagation control in a nonlinear rotor

Research of the crack propagation control in a nonlinear rot...

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IEEE International Conference on Mechatronics and Automation

作者： Jun Liu Yong Fan Jianen Chen Xiaofeng Wang Hongbiao Xiang School of Mechanical Engineering Tianjin University of Technology Tianjin China Tianjin key laboratory of the Design and Intelligent control of the Advanced Mechanical system Tianjin University of Technology Tianjin China

ISBN: (纸本)9781479970995

Due to the continuing action of alternating loads, the micro defects of rotor's materials and the micro traumas in the mechanic processing will easily cause the crack propagation and even the catastrophic accidents. The vibration characteristics of the rotor system, the crack breathing states and the crack breathing periods are investigated with different parameters of the synchronous state through the numerical simulation, which are all based on the dynamic model of the nonlinear cracked rotor and the describing function of the breathing crack. The crack breathing states are also studied under the asynchronous state. The paper proposes a novel method of the delaying crack propagation using an Electro-Magnetic Actuator (EMA) in order to realize the vibration control and the delaying crack propagation. By comparing influences of the crack breathing state caused by changes of different parameters (rotational speed, crack angle, crack depth and nonlinear parameters, etc.), the paper summarizes the mutation regulations of the crack breathing state in the synchronous and verifies the feasibility of delaying the crack propagation mechanism. The result of the research shows that the EMA can control the vibration of the nonlinear cracked rotor and delay the crack propagation in the running process of the nonlinear cracked rotor.

关键词： Rotors Vibrations Mathematical model Numerical simulation Numerical models Vibration control Finite element analysis

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Passivity-based synchronization of a new hyperchaotic Lorenz System

Passivity-based synchronization of a new hyperchaotic Lorenz...

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IEEE Conference on Cybernetics and intelligent Systems

作者： Ping He Yangmin Li Department of Electromechanical Engineering Avenida da Universidade Taipa Macao Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin China

ISBN: (纸本)9781467373395

In this paper, a passivity-based synchronization method is proposed for a new hyperchaotic Lorenz System based on Lyapunov stability theory and linear matrix inequality (LMI) approach. On the basis of the property of the passive system, the passive controller is designed and synchronization of two identical new hyperchaotic Lorenz systems with different initial conditions is realized. Finally, numerical simulations are presented to demonstrate the effectiveness of the proposed chaos control and synchronization schemes.

关键词： Synchronization Control systems Lyapunov methods Complex networks Chaotic communication

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Dynamic modeling for high-performance controller design of a UAV quadrotor

Dynamic modeling for high-performance controller design of a...

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International Conference on Information and Automation (ICIA)

作者： Yi-Rui Tang Yangmin Li Department of Electromechanical Engineering University of Macau Macao SAR China Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin China

ISBN: (纸本)9781467391054

This paper presents a systematic and comprehensive modeling approach for the derivation of a nonlinear dynamic model of a unmanned aerial vehicle (UAV) quadrotor. The model incorporates a couple of significant aerodynamic effects impacting on the quadrotor flight in different regimes. The controller is accordingly designed to accommodate both specific and uncertain dynamics of the quadrotor. The control laws of linear quadratic regulator (LQR) coupled with sliding mode control (SMC) are applied to the controller design so as to perform the optimal and robust control of the vehicle. The experimental results demonstrate the designed control algorithms are capable of delivering an remarkable performance on tracking of the reference input signals.

关键词： Rotors Blades Aerodynamics Mathematical model Vehicle dynamics Force Nonlinear dynamical systems

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Palmprint recognition based on sparse two-dimensional local discriminant projections

Palmprint recognition based on sparse two-dimensional local ...

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2014 International Conference on Applied Sciences, Engineering and Technology, ICASET 2014

作者： Zhang, Jian Xin Zhang, Zhan Ge Liu, Jian Yang Key Lab of Advanced Design and Intelligent Computing Ministry of Education Dalian University Dalian China

ISBN: (纸本)9783038351849

A novel palmprint recognition method based on sparse two-dimensional local discriminant projections (S2DLDP) is proposed. After a description of the basic theory and resolution method for S2DLDP, the paper presents the detail palmprint feature extraction method based on S2DLDP, and tests the algorithm performance by various non-zero elements size and neighborhood size. S2DLDP considerers the class information, local separability, two-dimensional image inherent properties of training samples and sparse projection, which provides an intuitive, semantic and interpretable feature subspace for palmprint representation. The optimal recognition accuracy of EER=2.2% is obtained on PolyU palmprint database, which also illuminates the effectiveness of the proposed algorithm. © (2014) Trans Tech Publications, Switzerland.

关键词： Palmprint recognition

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Research on orbit maneuver strategies of onorbit service vehicle for multispacecraft rendezvous mission

Research on orbit maneuver strategies of onorbit service veh...

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2014 International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SMTA 2014

作者： Li, Yue Zhang, Jianxin Zhang, Qiang Wei, Xiaopeng Key Lab of Advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian China

ISBN: (纸本)9781845649821

In consideration of the different servicing types and various orbital spatial relationships, the paper proposes an orbital maneuver strategies model of on-orbit service vehicle (OSV) based on multiple decision variables for the problem of multispacecraft rendezvous mission. We establish a variety of mathematical models of orbit maneuver strategies, and formulate the appropriate time energy’s numerical model for different service types, adding orbital spatial relationship and service type as design variables, finally determine the optimal maneuver strategies of OSV. The paper selects two interim circle orbits as example. We select the orbit transfer strategies for service vehicle. We also calculate the relationship of transfer time and energy consumption according to the time energy’s consumption requirements. © 2014 WIT Press.

关键词： Vehicles

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Tomography is Necessary for Universal Entanglement Detection with Single-Copy Observables

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Physical Review Letters 2016年第23期116卷 230501-230501页

作者： Dawei Lu Tao Xin Nengkun Yu Zhengfeng Ji Jianxin Chen Guilu Long Jonathan Baugh Xinhua Peng Bei Zeng Raymond Laflamme Institute for Quantum Computing University of Waterloo Waterloo N2L 3G1 Ontario Canada State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Centre for Quantum Computation and Intelligent Systems Faculty of Engineering and Information Technology University of Technology Sydney NSW 2007 Australia Department of Mathematics and Statistics University of Guelph Guelph Ontario N1G 2W1 Canada State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences Beijing 100190 China Joint Center for Quantum Information and Computer Science University of Maryland College Park Maryland 20742 USA Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei Anhui 230036 China Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada Perimeter Institute for Theoretical Physics Waterloo Ontario N2L 2Y5 Canada

Entanglement, one of the central mysteries of quantum mechanics, plays an essential role in numerous tasks of quantum information science. A natural question of both theoretical and experimental importance is whether universal entanglement detection can be accomplished without full state tomography. In this Letter, we prove a no-go theorem that rules out this possibility for nonadaptive schemes that employ single-copy measurements only. We also examine a previously implemented experiment [H. Park et al., Phys. Rev. Lett. 105, 230404 (2010)], which claimed to detect entanglement of two-qubit states via adaptive single-copy measurements without full state tomography. In contrast, our simulation and experiment both support the opposite conclusion that the protocol, indeed, leads to full state tomography, which supplements our no-go theorem. These results reveal a fundamental limit of single-copy measurements in entanglement detection and provide a general framework of the detection of other interesting properties of quantum states, such as the positivity of partial transpose and the k-symmetric extendibility.

关键词： Entanglement detection Entanglement measures Quantum tomography Nuclear magnetic resonance

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Studies on the Dynamic Behaviours and Mechanisms of Hepatic Vessel Perfusion with Simple Vessel Models

Studies on the Dynamic Behaviours and Mechanisms of Hepatic ...

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IEEE International Conference on Mechatronics and Automation

作者： Jun Liu Yong Fan Yihe Liu Hongbiao Xiang Tianjin key laboratory of the Design and Intelligent Control of the Advanced Mechanical System Tianjin University of Technology BinshuiXidao 391 Tianjin China Tianjin key Laboratory of Organ Transplantation Transplant surgery of Tianjin First Central Hospital Fukang Road 24 Tianjin China

ISBN: (纸本)9781479970995

The hydrodynamic behaviours of the perfusion process (cleaning) of the liver vessels before the operation was studied. A straight and a curved First-Class vessel entity model with foreign matter and the control equations of turbulent liquid in the vessels were established. With the physical parameters of a medical perfusion liquid measured, an estimation method of perfusion parameters was proposed. The simulation was performed by changing technical parameters of the perfusion. It is based on the control equations of turbulent liquid in the vessels and the preliminary calculated results using the vessel models. The simulation was performed by changing technical parameters of the perfusion. It is based on the control equations of turbulent liquid in the vessels and the preliminary calculated results using the vessel models. With the increasing perfusion velocities, the pressure and the velocity field increased in the two types of the vessel models. The negative trans-mural pressure and recirculation zones appeared and located on the foreign matter. Because of the influence of the vessel shape, the fluid dynamics behaviours in the curved vessel model are more complicated than those in the straight vessel model.

关键词： First-Class Vessel Model Equations of Turbulent Liquid Perfusion Fluid-Solid Coupling Calculation Mechanism Study

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Corrections to “Cross-Modal Correlation Learning by Adaptive Hierarchical Semantic Aggregation” [Jun 16 1201-1216]

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IEEE Transactions on Multimedia 2016年第10期18卷 2127-2127页

作者： Yan Hua Shuhui Wang Siyuan Liu Anni Cai Qingming Huang School of Information Engineering Communication University of China Beijing China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China Smeal College of Business Pennsylvania State University University Park PA USA Center of Cloud Computing Institute of Advanced Computing and Digital Engineering Shenzhen Institutes of Advanced Technology Shenzhen China Department of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China University of Chinese Academy of Sciences Beijing China Key Laboratory of Intellectual Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China

Presents corrections to the paper, "Cross-modal correlation learning by adaptive hierarchical semantic aggregation," (Hua, Y., et al) IEEE Trans. Multimedia, vol. 18, no. 6, pp. 1201-1216, Jun. 2016.

关键词： Semantics Learning (artificial intelligence) Ontologies Query processing

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Algorithm of Detecting and Filling Small Holes in Triangular Mesh Surface

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Computer Aided Drafting,design and Manufacturing 2014年第4期24卷 33-38页

作者： ZHOU Dong-sheng JIANG Chao DONG Jing LIU Rui Key Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian University

In some scattered point cloud triangular mesh restoration algorithm, small triangular mesh holes problem will often affect the quality of the model. For small holes at the details, this paper propose a method for identifying and extracting hollow edge,and use a triangle growth way based on boundary edge angle to fill the empty void. First, according the relationship of the point, side and face of the triangle mesh model to identify the hole, then extracting the holes boundary edge and classifying it. Finally, using a triangle growth method based on holes boundary edge angle to fill each small holes separated from the boundary. Compared with other algorithm of filling holes, this method is high efficiency for small holes of smooth surface,and itimprovesthe quality of the triangular mesh model.

关键词： triangular mesh holes detection holes filling

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