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arXiv 2018年

作者： Yang, Tao George, Jemin Qin, Jiahu Yi, Xinlei Wu, Junfeng State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang110819 China U.S. Army Research Laboratory AdelphiMD20783 United States Department of Automation University of Science and Technology of China Hefei230027 China Division of Decision and Control Systems School of Electrical Engineering and Computer Science KTH Royal Institute of Technology Stockholm100 44 Sweden College of Control Science and Engineering Zhejiang University Hangzhou310027 China

In this paper, we study the problem of finding the least square solutions of over-determined linear algebraic equations over networks in a distributed manner. Each node has access to one of the linear equations and holds a dynamic state. We first propose a distributed least square solver over connected undirected interaction graphs and establish a necessary and sufficient on the step-size under which the algorithm exponentially converges to the least square solution. Next, we develop a distributed least square solver over strongly connected directed graphs and show that the proposed algorithm exponentially converges to the least square solution provided the step-size is sufficiently small. Moreover, we develop a finite-time least square solver by equipping the proposed algorithms with a finite-time decentralized computation mechanism. The theoretical findings are validated and illustrated by numerical simulation examples. Copyright © 2018, The Authors. All rights reserved.

关键词： Linear equations

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Guest Editorial for Special Issue on control and Optimization in Renewable Energy Systems

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 167-167页

作者： Dianwei Qian Chengdong Li Qinmin Yang Xiangyang Zhao Yaobin Chen Haibo He School of Control and Computer Engineering North China Electric Power University School of Information and Electrical Engineering Shandong Jianzhu University College of Control Science and Engineering Zhejiang University School of Automation Science and Electrical Engineering Beihang University Department of Electrical and Computer Engineering Indiana University-Purdue University Department of Electrical Computerand Biomedical EngineeringUniversity of Rhode Island

I.I NTRODUCTION W ITH the advent of low-carbon economy,there has been a growing interest in harnessing renewable energy resources particularly for electricity *** energy resources are advocated for the economic and en... 详细信息

关键词： In Guest Editorial for Special Issue on control and Optimization in Renewable Energy Systems

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A Projection-Based Algorithm for Constrained L1- Minimization Optimization with Application to Sparse Signal Reconstruction

A Projection-Based Algorithm for Constrained L1- Minimizatio...

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International Conference on Information science and Technology (ICIST)

作者： Qingshan Liu Wei Zhang Jiang Xiong Bingrong Xu Long Cheng School of Mathematics Southeast University Nanjing China College of Computer Science and Engineering Chongqing Three Gorges University Chongqing China School of Automation Huazhong University of Science and Technolog< Wuhan China State Key Lab. of Management and Control for Complex Systems University of Chinese Academy of Sciences Beijing China

In this paper, a projection-base algorithm is proposed for solving the constrained L 1 -minimization problem. Furthermore, the algorithm is utilized to sparse signal reconstruction. The L 1 -minimization is first converted into some equations which are described by the projections onto a hyper box set and the nonnegative quadrant. Then a iterative algorithm is proposed for solving the L 1 -minimization problem. Next, the algorithm is applied to sparse signal reconstruction described as an L 1 -minimization problem subject to L ∞ -norm noise constraint, or equivalently bound constraint. Finally, several experiments are presented to show the performance of the proposed algorithm.

关键词： Signal processing algorithms Signal reconstruction Optimization Convergence Electronic mail Recurrent neural networks Lyapunov methods

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Structural Design and Gait Simulation of Bionic Quadruped Robot

Structural Design and Gait Simulation of Bionic Quadruped Ro...

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International Conference on Advanced Mechatronic Systems (ICAMechS)

作者： Dexin Liu Mingming Sun Dianwei Qian College of Robotics Beijing Union University Beijing P.R.C Basic Experimental Center for Natural Science University of Science and Technology Beijing Beijing P.R.C School of Control and Computer Engineering North China Electric Power University Beijing P.R.C

In order to solve the bionic quadruped robot movement control problems, a improved method with particular attention on toe trajectory is proposed. The kinematic equation of legs is established through motion analysisJoint angle functions are solved by inverse kinematics employing legs phases in typical gait planning and the displacement for rods of hydraulic cylinders by mechanism. The toe trajectory is calculated to ensures the smoothness of the robot moving. Experimental results show that the robot walks stably on the even surface, the undulation of body has small amplitude, and the design of prototype is rational and efficient.

关键词： Legged locomotion Hip Robot kinematics Knee Foot Mathematical model

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Understanding the dynamics of biological and neural oscillator networks through mean-field reductions: A review

arXiv

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arXiv 2019年

作者： Bick, Christian Goodfellow, Marc Laing, Carlo R. Martens, Erik Andreas Centre for Systems Dynamics and Control University of Exeter Exeter United Kingdom Department of Mathematics College of Engineering Mathematics and Physical Sciences University of Exeter Exeter United Kingdom Epsrc Centre for Predictive Modelling in Healthcare University of Exeter Exeter United Kingdom Mathematical Institute University of Oxford Oxford United Kingdom Living Systems Institute University of Exeter Exeter United Kingdom School of Natural and Computational Sciences Massey University Auckland New Zealand Department of Applied Mathematics and Computer Science Technical University of Denmark 2800 Kgs Lyngby Denmark Department of Biomedical Science University of Copenhagen Copenhagen N2200 Denmark

Many biological and neural systems can be seen as networks of interacting periodic processes. Importantly, the function of these networks depends on the collective dynamics: Synchrony of oscillations is probably amongst the most prominent examples of collective behavior and has been associated both with function and dysfunction. Understanding how network structure and interactions, as well as the microscopic properties of individual units, shape the emergent collective dynamics is critical to find factors that lead to malfunction. However, many biological systems such as the brain consist of a large number of dynamical units. Hence, their analysis has either primarily relied on simplified heuristic models on a coarse scale, or the analysis comes at a huge computational cost. Here we review recently introduced approaches-commonly known as the Ott-Antonsen and Watanabe-Strogatz reductions-That allow to simplify the analysis by bridging small and large scales: To obtain reduced model equations, a subpopulation in an oscillator network is replaced by a single variable that describes its collective state exactly. The resulting equations are next-generation models: Rather than being heuristic, they capture microscopic properties of the underlying system. At the same time, they are sufficiently simple to analyze without great computational effort. In the last decade, these reduction methods have become instrumental to understand how network structure and interaction shapes the collective dynamics and the emergence of synchrony. We review this progress based on concrete examples and outline possible limitations. Finally, we discuss how linking the reduced models with experimental data can guide the way towards the development of new treatment approaches, for example, for neural disease. Copyright © 2019, The Authors. All rights reserved.

关键词： Dynamics

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Topological-darkness-assisted phase regulation for atomically thin meta-optics

arXiv

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arXiv 2019年

作者： Wang, Yingwei Deng, Zi-Lan Hu, Dejiao Yuan, Jian Ou, Qingdong Qin, Fei Zhang, Yinan Ouyang, Xu Peng, Bo Cao, Yaoyu Guan, Bai-Ou Zhang, Yupeng He, Jun Qiu, Chengwei Bao, Qiaoliang Li, Xiangping Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University Guangzhou510632 China Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of Physics and Electronics Central South University 932 South Lushan Road Changsha Hunan410083 China College of Physics and Electronic Information Huaibei Normal University Huaibei235000 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Electronic Science and Technology Shenzhen University Shenzhen518060 China Monash University ClaytonVIC3800 Australia National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Films and Integrated Devices School of Microelectronics and Solid State Electronics University of Electronic Science and Technology of China Chengdu610054 China Department of Electrical and Computer Engineering National University of Singapore 4 Engineering Drive 3 117583 Singapore

Two-dimensional (2D) noble-metal dichalcogenides 1, 2 have emerged as a new platform for the realization of versatile flat optics with a considerable degree of miniaturization. However, light field manipulation at the atomic scale is widely considered unattainable since the vanishing thickness and intrinsic losses of 2D materials completely suppress both resonances and phase accumulation effects. Empowered by conventionally perceived adverse effects of intrinsic losses, we show that the structured PtSe2 films integrated with a uniform substrate can regulate nontrivial singular phase and realize atomic-thick meta-optics in the presence of topological darkness 3, 4. We experimentally demonstrate a series of atomic-thick binary meta-optics that allows angle-robust and high unit-thickness diffraction efficiency of 0.96%/nm in visible frequencies, given its thickness of merely 4.3 nm. Our results unlock the potential of a new class of 2D flat optics for light field manipulation at an atomic thickness. Copyright © 2019, The Authors. All rights reserved.

关键词： Platinum compounds

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Equilibrium solutions of multi-period mean-variance portfolio selection

arXiv

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arXiv 2018年

作者： Ni, Yuan-Hua Li, Xun Zhang, Ji-Feng Krstic, Miroslav College of Computer and Control Engineering Nankai University Tianjin300350 China Department of Applied Mathematics Hong Kong Polytechnic University Kowloon Hong Kong Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China School of Mathematical Sciences University of Chinese Academy of Sciences Beijing100049 China Department of Mechanical and Aerospace Engineering University of California San Diego United States

This is a companion paper of [Mixed equilibrium solution of time-inconsistent stochastic LQ problem, arXiv:1802.03032], where general theory has been established to characterize the open-loop equilibrium control, feedback equilibrium strategy and mixed equilibrium solution for a time-inconsistent stochastic linear-quadratic problem. This note is, on the one hand to test the developed theory of that paper, and on the other hand to push the solvability of multi-period mean-variance portfolio selection. A nondegenerate assumption has been removed in this note, which is popular in existing literature about multi-period mean-variance portfolio selection;and neat conditions have been obtained to characterize the existence of equilibrium solutions. Copyright © 2018, The Authors. All rights reserved.

关键词： Stochastic systems

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Skin Effect Suppressed NiFe/Cu Electroplated Multilayer Wiring for High Data-Rate and Low Delay-Time I/O Interface Board.

Skin Effect Suppressed NiFe/Cu Electroplated Multilayer Wiri...

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International Conference on Magnetics (INTERMAG)

作者： M. Yamaguchi T. Yanai H. Nakayama R. Sai H. Fujiwara Y. Kitai M. Sato U. Sangawa New Industry Creation Hachery Center Tohoku University Sendai Japan Division of Electrical Engineering and Computer Science Nagasaki University Nagasaki Japan Department of Electronics and Control Engineering National Institute of Technology Nagano College Nagano Japan Electronic Materials Business Division Automotive & Industrial Systems Company Panasonic Corporation Kadoma Japan

This paper proposes a new application of skin effect suppression technology [1]-[4] for long wiring on high-speed & low-delay I/O board (typical wiring length; 200 to 1000 mm). This proposal will overcome the difficulty to further reduce the transmission losses on the I/O board with >50 Gbps data rate, which is currently performed by lowering dielectric substrate losses and surface smoothing of Cu conductor. A major challenge in this paper is to demonstrate the skin effect suppression by electroplated magnetic/conductor multilayer, instead of sputter-deposited thin film in literature [2]-[4], in order to meet coming cost-effective, thick (>5 μm), large area, and high throughput mass productivity requirements. High frequency (>10 GHz) estimation of complex permeability and measurements of low resistance devices are also investigated.

关键词： Magnetics Conferences

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Dynamic Agent Evaluation Using Intuitionistic Fuzzy TOPSIS

Dynamic Agent Evaluation Using Intuitionistic Fuzzy TOPSIS

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International Conference on computer Supported Cooperative Work in Design

作者： Libo Zhang Jiubing Liu Bing Huang Huaxiong Li Xianzhong Zhou College of Engineering and Computer Science Australian National University Canberra Australia Department of Control and Systems Engineering Nanjing University Nanjing P.R. China School of Information Engineering Nanjing Audit University Nanjing P.R. China Research Center for Novel Technology of Intelligent Equipment Nanjing University Nanjing P.R. China

A novel dynamic intuitionistic fuzzy TOPSIS method is proposed to evaluate the agents when the expert evaluation values are Intuitionistic Fuzzy Numbers (IFNs). Similar to Positive Ideal Solution (PIS) in traditional TOPSIS, Positive Ideal Agent (PIA) is an ideal agent which achieves the best values in all the expert evaluations. Negative Ideal Agent (NIA) is the worst in every expert's evaluation. Then agent similarity to PIA and that to NIA are calculated. The relative ideal closeness of each agent is defined as a combination of the corresponding two similarities, which indicates the agent's relative capabilities. To deal with varied numbers of agents and experts, the update mechanisms are presented. A numerical example demonstrates the validity of our approach.

关键词： Indexes Task analysis Uncertainty Collaboration Fuzzy sets Conferences Collaborative work

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Circular scanning photoacoustic tomography based on a coplanar light illumination and ultrasonic detection

Circular scanning photoacoustic tomography based on a coplan...

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International Conference on Photonics and Imaging in Biology and Medicine, PIBM 2017

作者： Lin, Xiangwei Meng, Jing Hu, Depeng Leng, Guanji Yu, Shaoheng Liu, Yang Lin, Riqiang Liu, Xiaoyang Liu, Chengbo Gong, Xiaojing Sun, Mingjian Department of Control Science and Engineering Harbin Institute of Technology Harbin150001 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Qufu Normal University College of Computer Science 80 Yantai Road North Rizhao276826 China

A circular scanning photoacoustic tomography using coplanar light illumination and ultrasonic detection is proposed by the aid of a translucent quartz bowl. Phantom experiments demonstrate this novel coplanar configur... 详细信息

ISBN: (纸本)9781943580354

关键词： Tomography

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