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6. GMM-Workshops Mikro-Nano-Integration - 6th GMM Workshop on Micro-Nano-Integration

作者： Krauskopf, J.E. Bartenwerfer, M. Fatikow, S. Division Microrobotics and Control Engineering Department of Computing Science University of Oldenburg OldenburgD-26129 Germany

ISBN: (纸本)9783800742783

Thermal drift is a problem in imaging with atomic force microscopes. In this work we present an extension of the well known gradient-based methods for optical flow calculation, developed by Horn & Schunk as well as Lucas & Kanade. We also analyse different trajectories and evaluate their suitability for use with the aforementioned methods. As part of this theoretical work, we are able to show that the methods by Horn & Schunk and Lucas & Kanade are extendable to the thermal drift problem. Furthermore, we compare different standard trajectories with a self-developed evaluation system and propose a favourable trajectory for drift estimation and compensation. © 2016 VDE VERLAG GMBH ∙ Berlin ∙ Offenbach.

关键词： Trajectories

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An auto-tuning controller for networked control systems 15

An auto-tuning controller for networked control systems

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15th International Conference on Electronics, Information, and Communications, ICEIC 2016

作者： Thuy, Pham Xuan Hiep, Nguyen Tran Automatic Control and Computing Engineering Department Le Quy Don Technical University Hanoi Viet Nam

ISBN: (纸本)9781467380164

In this paper, we introduce a proportional-integral-derivative (PID) auto-tuning controller by using relay feedback and online gain updating method for networked control systems (NCSs). The proposed controller takes both advantages of relay feedback, which provides the initial knowledge of the control system, and updating method, that adapts to the changing input and load disturbance. In order to validate the effectiveness of our design, the proposed controller is evaluated experimentally with cFP 2220 platform from National Instruments, and with LabVIEW programming software. The results show that our design obtains superior tracking performance. © 2016 IEEE.

关键词： controllers

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Automated data extraction from synthetic and real radargrams of district heating pipelines

Automated data extraction from synthetic and real radargrams...

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International Workshop on Advanced Ground Penetrating Radar (IWAGPR)

作者： Aleksandar Ristić Milan Vrtunski Miro Govedarica Lara Pajewski Xavier Derobert Department for computing and control engineering University of Novi Sad Novi Sad Serbia Department of Information Engineering Electronics and Telecommunications Sapienza University of Rome Rome Italy GERS Department LUNAM University Bouguenais France

ISBN: (纸本)9781509054855

The main goal of this paper is to investigate the performance of an algorithm for point extraction from hyperbolic reflections in synthetic and real Ground-Penetrating Radar (GPR) data. The real radargrams that we considered contain hyperbolic reflections due to the presence, in the surveyed area, of district heating pipelines DN250 (250mm inner diameter pipe). These are buried 88 cm deep in a soil trench, and covered by compacted sand and concrete bricks (behaton pavement). The synthetic radargrams result from the simulation of a model representing the real geometry on the location of interest. The simulation was carried out by using gprMax, ver. 3.

关键词： Reflection Ground penetrating radar Heating systems Pipelines Soil Concrete Geometry

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Properties of solutions to porous medium problems with different sources and boundary conditions

arXiv

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arXiv 2018年

作者： Li, Tongxing Pintus, Nicola Viglialoro, Giuseppe LinDa Institute of Shandong Provincial Key Laboratory of Network Based Intelligent Computing Linyi University Linyi Shandong276005 China School of Control Science and Engineering Shandong University Jinan Shandong250061 China Osservatorio Astronomico di Cagliari Cagliari Via della Scienza 5 09047 Italy Dipartimento di Matematica e Informatica Università di Cagliari Cagliari V. le Merello 92 09123 Italy

In this paper we study nonnegative and classical solutions u = u(x, t) to porous medium problems of the type[(ut =Δum + g(u,m|Δu|) x ∈Ω, t ∈ I,u(x, 0) = u0(x) x ϵΩ,where is a bounded and smooth domain of RN, with N ≥ 1, I = (0, t∗) is the maximal interval of existence of u, m > 1 and u0(x) is a nonngative and sufficiently regular function. The problem is equipped with different boundary conditions and depending on such boundary conditions as well as on the expression of the source g, global existence and blow-up criteria for solutions to are established. Additionally, in the three dimensional setting and when blow-up occurs, lower bounds for the blow-up time t∗ are also derived.35K55, 35K57, 35A01, 74H35 Copyright © 2018, The Authors. All rights reserved.

关键词： Porous materials

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Some Open Problems on Simultaneous Stabilization of Linear Systems

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Journal of Systems Science & Complexity 2016年第2期29卷 289-299页

作者： LI Wang WANG Long YU Wensheng Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062China. Intelligent Control Laboratory College of EngineeringPeking UniversityBeijing 100871China. College of Electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China.

Simultaneous stabilization of linear systems is a fundamental issue in the system and control theory, and is of theoretical and practical significance. In this paper, the authors review the recent research progress and the state-of-art results on simultaneous stabilization of single-input single-output linear time-invariant systems. Especially, the authors list the ever best results on the parameters involved in the well known ＂French Champagne Problem＂ and ＂Belgian Chocolate Problem＂ from the point of view of mathematical theoretical analysis and numerical calculation. And the authors observed that Boston claimed the lower bound of 5 can be enlarged to 0.976461 in 2012 is not accurate. The authors hope it will inspire further study on simultaneous stabilization of several linear systems.

关键词： Belgian Chocolate problem French Champagne Problem linear systems simultaneous stabilization.

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Minimum Fill-In: Inapproximability and Almost Tight Lower Bounds 17

Minimum Fill-In: Inapproximability and Almost Tight Lower Bo...

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Annual ACM-Society for Industrial and Applied Mathmatics Symposium on Discrete Algorithms

作者： Yixin Cao R. B. Sandeep Department of Computing Hong Kong Polytechnic University Department of Computer Science & Engineering Indian Institute of Technology Hyderabad India and Institute for Computer Science and Control Hungarian Academy of Sciences

ISBN: (纸本)9781510836358

Performing Gaussian elimination to a sparse matrix may turn some zeroes into nonzero values, so called fill-ins, which we want to minimize to keep the matrix sparse. Let n denote the rows of the matrix and k the number of fill-ins. For the minimum fill-in problem, we exclude the existence of polynomial time approximation schemes, assuming P≠NP, and the existence of 2~(O(n~(1-δ)))-time approximation schemes for any positive δ, assuming the Exponential Time Hypothesis. Also implied is a 2~(O(k~(1/2-δ)))·n~(O(1)) parameterized lower bound. Behind these results is a new reduction from vertex cover, which might be of its own interest: All previous reductions for similar problems are from some kind of graph layout problems.

关键词： Lower bound Gaussian elimination Sparse matrix minimum Exponential time approximation Polynomial time

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Multitarget tracking with the von mises-fisher filter and probabilistic data association

Multitarget tracking with the von mises-fisher filter and pr...

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作者： Markovíc, Ivan Bukal, Mario Cesíc, Josiṕ Petrovíc, Ivan Department of Computer and Control Engineering University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia Department of Applied Mathematics University of Zagreb Faculty of Electrical Engineering and Computing Zagreb Croatia

Directional data emerge in many scientific disciplines due to the nature of the observed phenomena or the working principles of a sensor. The problem of tracking with direction-only sensors is challenging since the motion of the target typically resides either in 3D or 2D Euclidean space, while the corresponding measurements reside either on the unit sphere or the unit circle, respectively. Furthermore, in multitarget tracking there is the need to deal with the problem of pairing sensors measurements with targets in the presence of clutter (the data association problem). In this paper we propose to approach multitarget tracking in clutter with directiononly data by setting it on the unit hypersphere, thus tracking the objects with a Bayesian estimator based on the von Mises-Fisher distribution and probabilistic data association. To achieve this goal we derive the probabilistic data association (PDA) filter and the joint probabilistic data association (JPDA) filter for the Bayesian von Mises-Fisher estimation on the unit hypersphere. The final PDA and JPDA filter equations are derived with respect to the Kullback-Leibler divergence by preserving the first moment of the hyperspherical distribution. Although the fundamental equations are given for the hyperspherical case, we focus on the filters on the unit 1-sphere (circle in 2) and the unit 2-sphere (surface of the unit ball in 3). The proposed approach is validated through synthetic data experiments on 100 Monte Carlo runs simulating multitarget tracking with noisy directional measurements and clutter. © 2016 JAIF.

关键词： Clutter (information theory)

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The Smart Street Lighting System Based on NB-IoT

The Smart Street Lighting System Based on NB-IoT

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Chinese Automation Congress

作者： Shichao Chen Shuangshuang Han Gang Xiong Fei-Yue Wang Jia Xu Kun Wang Macau University of Science and Technology Chinese Academy of Sciences Macau China The Cloud Computing Center Chinese Academy of Sciences Dongguan China Beijing University of Chemical Technology Chinese Academy of Sciences Beijing China The State Key Laboratory for Management and Control of Complex Systems Chinese Academy of Sciences The Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing China Qingdao Academy of Intelligent Industries The State Key laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Qingdao China Beijing University of Chemical Technology Beijing China

With the development of communication technology, in order to meet the smart city's demand for intelligent infrastructure, the smart street lighting system based on NB-IoT is an effective method to realize the goal. This paper elaborates on the smart street lighting system's architecture, including the perception and control layer, the transport layer, the platform layer and the application layer. In addition, the actual system is built to verify. This system uses STM32 to build the perception and controller, and relies on China Telecom's NB-IoT communication network for the data transmission, finally using the IoT management platform-Huawei OceanConnect- to implement the connection management, the device management, the data calculation and the remote control functions. This system verifies the feasibility of the smart street lighting system based on NB-IoT technology, which provides the reference for the promotion and application. It is expected to provide intelligent, diversified, efficient and economical services for the smart cities.

关键词： Smart street lighting system NB-IoT IoT Smart city

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Finite-time output consensus of second-order multi-agent systems with mismatched disturbances via active anti-disturbance control

Finite-time output consensus of second-order multi-agent sys...

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Asian control Conference

作者： Guipu Li Xiangyu Wang Shihua Li Wei Xing Zheng Xisong Chen School of Automation Southeast University Nanjing PR China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education PR China School of Computing Engineering and Mathematics Western Sydney University Sydney NSW Australia

ISBN: (纸本)9781509015740;9781509015733

This paper studies the finite-time output consensus problem of second-order multi-agent systems with both mismatched disturbances and unknown state elements. This problem is solved by an active anti-disturbance control (AADC) method, which integrates the disturbance estimation/compensation and the baseline consensus protocols based on feedback control together. To estimate the matched/mismatched disturbances and the agents unknown state elements, a finite-time generalized state observer is constructed for each agent. Based on the distributed adding a power integrator feedback control method, and the estimates of the matched/mismatched disturbances and the systems unknown states, AADC consensus protocols are developed for both leaderless and leader-follower cases. The proposed protocols achieve finite-time consensus of the agents outputs in both cases. Simulation results demonstrate the effectiveness of the proposed consensus algorithms.

关键词： Multi-agent systems Output consensus Mismatched disturbances Distributed adding a power integrator method Finite-time generalized state observer

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Joint Beamforming and Power-Splitting control in Downlink Cooperative SWIPT NOMA Systems

Joint Beamforming and Power-Splitting Control in Downlink Co...

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作者： Xu, Yanqing Shen, Chao Ding, Zhiguo Sun, Xiaofang Yan, Shi Zhu, Gang Zhong, Zhangdui State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing100044 China State Key Laboratory of Integrated Services Networks Xidian University Xi'an710071 China School of Computing and Communications Lancaster University LancasterLA1 4WA United Kingdom State Key Laboratory of Rail Traffic Control and Safety Beijing Engineering Research Center of High-Speed Railway Broadband Mobile Communications Beijing Jiaotong University Beijing100044 China

This paper investigates the application of simultaneous wireless information and power transfer (SWIPT) to cooperative non-orthogonal multiple access (NOMA). A new cooperative multiple-input single-output (MISO) SWIPT NOMA protocol is proposed, where a user with a strong channel condition acts as an energy-harvesting (EH) relay by adopting power splitting (PS) scheme to help a user with a poor channel condition. By jointly optimizing the PS ratio and the beamforming vectors, we aim at maximizing the data rate of the 'strong user' while satisfying the QoS requirement of the 'weak user'. To resolve the formulated nonconvex problem, the semidefinite relaxation (SDR) technique is applied to reformulate the original problem, by proving the rank-one optimality. And then an iterative algorithm based on successive convex approximation (SCA) is proposed for complexity reduction, which can at least attain its stationary point efficiently. In view of the potential application scenarios, e.g., Internet of Things (IoT), the single-input single-output (SISO) case is also studied. The formulated problem is proved to be strictly unimodal with respect to the PS ratio. Hence, a golden section search (GSS) based algorithm with closed-form solution at each step is proposed to find the unique global optimal solution. It is worth pointing out that the SCA method can also converge to the optimal solution in SISO cases. In the numerical simulation, the proposed algorithm is numerically shown to converge within a few iterations, and the SWIPT-aided NOMA protocol outperforms the existing transmission protocols. © 2017 IEEE.

关键词： Beamforming

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