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26th Annual Computational Neuroscience Meeting (CNS*2017): Part 3 Antwerp, Belgium. 15-20 July 2017 Abstracts

BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 95-176页

作者： [Anonymous] Department of Neuroscience Yale University New Haven CT 06520 USA Department Physiology & Pharmacology SUNY Downstate Brooklyn NY 11203 USA NYU School of Engineering 6 MetroTech Center Brooklyn NY 11201 USA Departament de Matemàtica Aplicada Universitat Politècnica de Catalunya Barcelona 08028 Spain Institut de Neurobiologie de la Méditerrannée (INMED) INSERM UMR901 Aix-Marseille Univ Marseille France Center of Neural Science New York University New York NY USA Aix-Marseille Univ INSERM INS Inst Neurosci Syst Marseille France Laboratoire de Physique Théorique et Modélisation CNRS UMR 8089 Université de Cergy-Pontoise 95300 Cergy-Pontoise Cedex France Department of Mathematics and Computer Science ENSAT Abdelmalek Essaadi’s University Tangier Morocco Laboratory of Natural Computation Department of Information and Electrical Engineering and Applied Mathematics University of Salerno 84084 Fisciano SA Italy Department of Medicine University of Salerno 84083 Lancusi SA Italy Dipartimento di Fisica Università degli Studi Aldo Moro Bari and INFN Sezione Di Bari Italy Data Analysis Department Ghent University Ghent Belgium Coma Science Group University of Liège Liège Belgium Cruces Hospital and Ikerbasque Research Center Bilbao Spain BIOtech Department of Industrial Engineering University of Trento and IRCS-PAT FBK 38010 Trento Italy Department of Data Analysis Ghent University Ghent 9000 Belgium The Wellcome Trust Centre for Neuroimaging University College London London WC1N 3BG UK Department of Electronic Engineering NED University of Engineering and Technology Karachi Pakistan Blue Brain Project École Polytechnique Fédérale de Lausanne Lausanne Switzerland Departement of Mathematics Swansea University Swansea Wales UK Laboratory for Topology and Neuroscience at the Brain Mind Institute École polytechnique fédérale de Lausanne Lausanne Switzerland Institute of Mathematics University of Aberdeen Aberdeen Scotland UK Department of Integrativ

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Delay-dependent robust anti-windup synthesis approach to AQM in TCP/IP networks

Delay-dependent robust anti-windup synthesis approach to AQM...

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International Conference on Electrical and Information Technologies (ICEIT)

作者： Nabil El Fezazi Fatima El Haoussi El Houssaine Tissir Abdul Rashid Husain Muhammad Iqbal Zakaria Department of Physics Sidi Mohammed Ben Abdellah University Morocco Polydisciplinary Faculty Department of Mathematic and Informatics Nador Morocco Sidi Mohammed Ben Abdellah University Department of Physics Faculty of Sciences Dhar El Mehraz LESSI BP 1796 Fes-Atlas Morocco Department of Control and Mechatronic Engineering Universiti Teknologi 81310 Skudai Johor Malaysia

ISBN: (纸本)9781467384704

An anti-windup compensator for input saturating systems with input and state delays is applied to active queue management (AQM) of a congested TCP/IP router. A TCP model with link capacity disturbances, modeling uncertainties and time-varying delay is investigated, and the objective is to design a controller which is capable of achieving the queue size and can guarantee robust stability in the presence of disturbance and model perturbations. Numerical example is given to demonstrate the effectiveness of the proposed method in comparison with other conventional methods.

关键词： transport protocols computer networks queueing theory stability telecommunication congestion control telecommunication network management

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Flux and Position Observer of Permanent Magnet Synchronous Motors with Relaxed Persistency of Excitation Conditions

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IFAC-PapersOnLine 2015年第11 11期48卷 301-306页

作者： Aranovskiy, Stanislav Bobtsov, Alexey A. Pyrkin, Anton A. Ortega, Romeo Chaillet, Antoine Department of Control Systems and Informatics ITMO University St. Petersburg Russia Laboratory “Control of Complex Systems” Institute for Problems of Mechanical Engineering St. Petersburg Russia Laboratoire des Signaux et Systèmes CNRS-SUPELEC Plateau du MoulonGif-sur-Yvette91192 France

In this paper we propose a flux and position observer for permanent magnet synchronous motors when voltages, currents and rotor speed are available for measurement. We prove that this observer converges under weaker assumptions than the classical persistence of excitation condition. Simulations confirm the eficacy of the proposed observer and show that it can cope with imprecision in rotor speed measurement, which allows to use an estimator when the speed cannot be measured directly. © 2015

关键词： Permanent magnets Electric motors Synchronous motors Adaptive observer Permanent magnet motor Permanent Magnet Synchronous Motor Persistence of excitation Persistency of excitation Position observer Rotor speed

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On Stability of Tunable Linear Time-Varying Band-Pass Filters

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IFAC-PapersOnLine 2015年第11 11期48卷 345-347页

作者： Wang, Jian Aranovskiy, Stanislav Bobtsov, Alexey A. Pyrkin, Anton A. Gritcenko, Polina A. Institute of Automation Hangzhou Dianzi University Xiasha Higher Education Zone HangzhouZhejiang Province310018 China Department of Control Systems and Informatics ITMO University St. Petersburg Russia Laboratory "Control of Complex Systems" Institute for Problems of Mechanical Engineering St. Petersburg Russia

Tunable linear time-varying filters are widely used in many adaptive and signal processing applications. In this paper we consider a problem of stability analysis of tunable time-varying band-pass filters and prove that for a certain realization of these filters stability is ensured under assumption that tuning signal, namely a central frequency of the filter, is bounded and strictly above zero. An illustrative example of measurement noise attenuation is also given. © 2015

关键词： Bandpass filters Adaptive filtering Adaptive filters Stability Central frequency Linear time varying Measurement Noise Signal processing applications Stability analysis Time varying Tunable filters

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Possible structural origin of superconductivity in Sr-doped Bi2Se3

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Physical Review Materials 2018年第1期2卷 014201-014201页

作者： Zhuojun Li Meng Wang Dejiong Zhang Nan Feng Wenxiang Jiang Chaoqun Han Weijiong Chen Mao Ye Chunlei Gao Jinfeng Jia Jixue Li Shan Qiao Dong Qian Ben Xu He Tian Bo Gao CAS Center for Excellence in Superconducting Electronics (CENSE) Shanghai 200050 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai 200050 China University of Chinese Academy of Sciences Beijing 100049 China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 People's Republic of China Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

Doping bismuth selenide (Bi2Se3) with elements such as copper and strontium (Sr) can induce superconductivity, making the doped materials interesting candidates to explore potential topological superconducting behaviors. It was thought that the superconductivity of doped Bi2Se3 was induced by dopant atoms intercalated in van der Waals gaps. However, several experiments have shown that the intercalation of dopant atoms may not necessarily make doped Bi2Se3 superconducting. Thus, the structural origin of superconductivity in doped Bi2Se3 remains an open question. Herein, we combined material synthesis and characterization, high-resolution transmission electron microscopy, and first-principles calculations to study the doping structure of Sr-doped Bi2Se3. We found that the emergence of superconductivity is strongly related with n-type dopant atoms. Atomic-level energy-dispersive x-ray mapping revealed various n-type Sr dopants that occupy intercalated and interstitial positions. First-principles calculations showed that the formation energy of a specific interstitial Sr doping position depends strongly on the Sr doping level. This site changes from a metastable position at low Sr doping level to a stable position at high Sr doping level. The calculation results explain why quenching is necessary to obtain superconducting samples when the Sr doping level is low and also why slow furnace cooling can yield superconducting samples when the Sr doping level is high. Our findings suggest that Sr atoms doped at interstitial locations, instead of those intercalated in van der Waals gaps, are most likely to be responsible for the emergence of superconductivity in Sr-doped Bi2Se3.

关键词： Dopants Impurities in superconductors

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Enhanced anaerobic digestion of waste activated sludge of low organic content in a novel digester

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Water Science and Technology 2015年第6期72卷 966-973页

作者： Wu, J. Jiang, Y. Cao, Z.P. Li, Z.H. Hu, Y.Y. Li, H.Z. Zuo, J.E. Wang, K.J. State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Department of Civil Engineering College of Engineering and Informatics NUI Galway Galway Ireland Laboratory of Reactions and Process Engineering Université de Lorraine CNRS 1 rue Grandville Nancy Cedex54001 France

A novel digester, termed an internal circulation anaerobic digester (ICAD), was developed to intensify sludge digestion. It consists of reaction zone, settling zone, thickening zone, riser and downcomer. Internal circulation in the digester is intensified by backflow biogas. The mesophilic ICAD treating thermal pretreated waste activated sludge with volatile suspended solids (VSS)/suspended solids (SS) of 0.45-0.49 was conducted in this study to reduce and stabilize the low organic content sludge. The results showed that the VSS removal rate and biogas rate reached 46.0% and 0.72 m3/kg VSSfed at hydraulic retention time (HRT) of 15 days. VSS/SS and soluble chemical oxygen demand (SCOD) of the effluent sludge ranged from 0.39 to 0.41 and 274 mg/L to 473 mg/L, respectively, under various HRTs from 10 to 27 days. The degradation ability of ICAD derived from the improved mass transfer by internal circulation and long solid retention time at short HRT is compared with continuous stirred tank reactor. © 2015 IWA Publishing.

关键词： Anaerobic digestion

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Hybrid Output controller for Biased and Time-Varying Periodic Disturbances Rejection

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IFAC-PapersOnLine 2015年第11 11期48卷 872-877页

作者： Bobtsov, Alexey A. Kolyubin, Sergey A. Pyrkin, Anton A. Nikolaev, Nikolay A. Department of Control Systems and Informatics Saint Petersburg National Research University of Information Technologies Mechanics and Optics Kronverkskiy pr. 49 St. Petersburg197101 Russia Department of Engineering Cybernetics Norwegian University of Science and Technology TrondheimNO-7491 Norway Control of Complex Systems Lab. Institute for Problems of Mechanical Engineering RAS Bolshoy pr. V.O. 61 St.Petersburg199178 Russia

The task of output feedback stabilization of a linear plant of arbitrary relative degree is solved under parametric uncertainty and matching periodic disturbances. Resulting controller was built coupling a high-gain output controller and an external disturbance observer by means of switching algorithm. Extending previously developed approach we suppose disturbance frequency to be not only unknown, but also time-varying, which is the case for a number of applications. Simulation results illustrate performance of the obtained controller for the cases of piece-wise constant and drifting frequency disturbances. © 2015

关键词： Feedback controllers Disturbance rejection Disturbance frequency External disturbances Output feedback controls Output feedback stabilization Parametric uncertainties Periodic disturbances Piece wise constants Switching control

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Distributed tasks: Introducing distributed computing to programming competitions 28

Distributed tasks: Introducing distributed computing to prog...

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International Conference Joint with the 28th International Olympiad in informatics, IOI 2016

作者： Karczmarz, Adam Lącki, Jakub Polak, Adam Radoszewski, Jakub Wojtaszczyk, Jakub O. Faculty of Mathematics Informatics and Mechanics University of Warsaw ul. Banacha 2 Warsaw02-097 Poland Department of Computer Control Management Engineering Antonio Ruberti Sapienza University of Rome via Ariosto 25 Roma00185 Italy Department of Theoretical Computer Science Faculty of Mathematics and Computer Science Jagiellonian University ul. Lojasiewicza 6 Kraków30-348 Poland King's College London Strand LondonWC2R 2LS United Kingdom Google Warsaw Emilii Plater 53 Warsaw00-113 Poland

In this paper we present distributed tasks, a new task type that can be used at programming competitions. In such tasks, a contestant is supposed to write a program which is then simultaneously executed on multiple computing nodes (machines). The instances of the program may communicate and use the joint computing power to solve the task presented to the contestant. We show a framework for running a contest with distributed tasks, that we believe to be accessible to contestants with no previous experience in distributed computing. Moreover, we give examples of distributed tasks that have been used in the last two editions of a Polish programming contest, Algorithmic Engagements, together with their intended solutions. Finally, we discuss the challenges of grading and preparing distributed tasks. © 2016 IOI, Vilnius University.

关键词： Computing power

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26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

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BMC NEUROSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

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Output control Algorithms of Dynamic Positioning and Disturbance Rejection for Robotic Vessel

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IFAC-PapersOnLine 2015年第11 11期48卷 295-300页

作者： Wang, Jian Pyrkin, Anton A. Bobtsov, Alexey A. Borisov, Oleg I. Gromov, Vladislav S. Kolyubin, Sergey A. Vlasov, Sergey M. Institute of Automation Hangzhou Dianzi University Xiasha Higher Education Zone HangzhouZhejiang Province310018 China Department of Control Systems and Informatics ITMO University Kronverkskiy av. 49 Saint Petersburg197101 Russia Laboratory "Control of Complex Systems" Institute for Problems of Mechanical Engineering Bolshoy pr. V.O. 61 Saint Petersburg199178 Russia Department of Engineering Cybernetics Norwegian University of Science and Technology TrondheimNO-7491 Norway

In this paper two control problems for a surface robotic vessel are addressed. One is design of a dynamic positioning (DP) system. The other deals with advanced dynamic positioning (ADP) which is extended by an unknown disturbance rejection. Considered plant is represented as a MIMO system which comprised of three independent SISO channels. For the DP problem all SISO channels are controlled by virtual control inputs generated using a robust approach, so called, "consecutive compensator". Then after an inverse MIMO transformation real control signals are calculated for robotic actuators. For the APD problem we design the cancellation scheme for channels with input delays that may be caused by a command transmission via the radio channel or computational complexity of the image processing. To finalize the investigation proposed DP algorithm is applied to the robotic complex of vessel motion modeling. © 2015

关键词： Dynamic positioning Disturbance rejection Image processing Inverse problems MIMO systems Nonlinear systems Radio transmission Robotics Robust control control problems control signal Output control Robotic actuators Robotic complexes Robust approaches Vessel motions Virtual control

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