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IEEE Jordan Conference on Applied Electrical engineering and Computing Technologies (AEECT)

作者： Alireza Ghaempanah Jawad Faiz Department of Electrical Machines Niroo Research Institute Tehran Iran Center of Excellence on Applied Electromagnetic Systems School of Electrical and Computer Engineering University of Tehran Tehran Iran

Impact of the rotor end-winding on the force distribution of the stator end-winding using equivalent current sheets or a concentrated coil in each rotor slot has been so far considered in the literatures. However, the impact of the stator stepped end core on the force has not been studied yet. In this paper calculation methods for magnetic force exerted on the stator end-winding are first reviewed comprehensively; then the impact of some parameters on the magnetic force distribution on the stator end-winding of a 2-pole, 200 MVA turbo-generator under sudden three-phase short-circuit are studied. Three-dimensional finite element method (FEM) based on the reduced magnetic scalar potential formulation is used. The stator and rotor end-windings actual geometry is taken into account, except their cross section areas which are approximated by combination of straight line segments. To simplify the meshing process, stator stepped end core geometry is replaced by equivalent ramp geometry. Short-circuit currents of the generator windings are computed using two-dimensional transient FEM. It is shown that these parameters affect the stator end-winding magnetic force, particularly in the involutes part of the stator end-coils.

关键词： Stator cores Rotors Stator windings Force Magnetic cores Turbogenerators

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Loop Closure Detection by Compressed Sensing for Exploration of Mobile Robots in Outdoor Environments

Loop Closure Detection by Compressed Sensing for Exploration...

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RSI/ISM International Conference on Robotics and Mechatronics

作者： Alireza Norouzzadeh Ravari Hamid D. Taghirad Advanced Robotics and Automated Systems (ARAS) Industrial Control Center of Excellence (ICCE) Faculty of Electrical and Computer Engineering K.N. Toosi University of Technology Tehran Iran

ISBN: (纸本)9781467372350

In the problem of simultaneously localization and mapping (SLAM) for a mobile robot, it is required to detect previously visited locations so the estimation error shall be reduced. Sensor observations are compared by a similarity metric to detect loops. In long term navigation or exploration, the number of observations increases and so the complexity of the loop closure detection. Several techniques are proposed in order to reduce the complexity of loop closure detection. Few algorithms have considered the loop closure detection from a subset of sensor observations. In this paper, the compressed sensing approach is exploited to detect loops from few sensor measurements. In the basic compressed sensing it is assumed that a signal has a sparse representation is a basis which means that only a few elements of the signal are non-zero. Based on the compressed sensing approach a sparse signal can be recovered from few linear noisy projections by l_1 minimization. The difference matrix which is widely used for loop detection has a sparse structure, where similar observations are shown by zero distance and different locations are indicated by ones. Based on the multiple measurement vector technique which is an extension of the basic compressed sensing, the loop closure detection is performed by comparison of few sensor observations. The applicability of the proposed algorithm is investigated in some outdoor environments through some publicly available data sets. It has been shown by some experiments that the proposed method can detect loops effectively.

关键词： Loop Closure Detection Compressed Sensing Mobile Robots

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Foreword

Proceedings of the 2016 International Conference on Image Pr...

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Proceedings of the 2016 International Conference on Image Processing, computer Vision, and Pattern Recognition, IPCV 2016 2016年

作者： Abd-Wahab, Mohd Helmy Al-Bakry, Abbas Al-Holou, Nizar Arabnia, Hamid R. Bhattacharya, Mahua Martinez Castillo, Juan Jose Daimi, Kevin Deligiannidis, Leonidas Djoudi, Lamia Atma Duong, Trung Eshaghian-Wilner, Mary Mehrnoosh Gravvanis, George A. Huang, Ruizhu Jandieri, George Kim, Byung-Gyu Kim, Tai-hoon Korovin, Iakov Lai, Guoming Lee, Hyo Jong Bin Mansor, Muhammad Naufal Marsh, Andrew Mostafaeipour, Ali Park, James J. Patil, Shashikant Ponalagusamy, R. Schaefer, Gerald Singh, Akash Solo, Ashu M.G. Swee, Sim Kok Thomas, Jaya Tinetti, Fernando G. Vladimir, Hahanov Wang, Shiuh-Jeng Yang, Mary Yoe, Hyun You, Jane Zhao, Wenbing Department of Computer Engineering University Tun Hussein Onn Malaysia Malaysia University of IT and Communications Baghdad Iraq Electrical and Computer Engineering Department IEEE/SEM-Computer Chapter University of Detroit Mercy DetroitMI United States University of Georgia United States ABV Indian Institute of Information Technology and Management MHRD Government of India India Acantelys Alan Turing Nikola Tesla Research Group and GIPEB Universidad Nacional Abierta Venezuela Computer Science and Software Engineering Programs Department of Mathematics Computer Science and Software Engineering University of Detroit Mercy DetroitMI United States Department of Computer Information Systems Wentworth Institute of Technology BostonMA United States Synchrone Technologies France Rutgers University State University of New Jersey New Jersey United States University of Southern California California United States Electrical Engineering University of California Los Angeles Los Angeles [UCLA CA United States Advanced Scientific Computing Applied Math and Applications Research Group Applied Mathematics and Numerical Computing and Department of ECE School of Engineering Democritus University of Thrace Xanthi Greece Texas Advanced Computing Center University of Texas AustinTX United States Georgian Technical University Tbilisi Georgia Institute of Cybernetics Georgian Academy of Science Georgia Multimedia Processing CommunicationsLab.[MPCL Department of Computer Science and Engineering College of Engineering SunMoon University Korea Republic of School of Information and Computing Science University of Tasmania Australia Southern Federal University Russia Computer Science and Technology Sun Yat-Sen University Guangzhou China Center for Advanced Image and Information Technology Division of Computer Science and Engineering Chonbuk National University Korea Republic of Faculty of Engineering Technology Kampus Uniciti Alam Universiti Malaysia Perlis UniMAP Malaysi

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DESYNCHRONIZATION OF TWO COUPLED LIMIT-CYCLE OSCILLATORS USING AN ASTROCYTE-INSPIRED CONTROLLER

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International Journal of Biomathematics 2014年第1期7卷 1-23页

作者： GHAZAL MONTASERI MOHAMMAD JAVAD YAZDANPANAH Advanced Control Systems Laboratory School of Electrical and Computer EngineeringCollege of Engineering University of Tehran Tehran Iran Advanced Control Systems LaboratoryControl and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran

Astrocytes have potential to break synchrony between neurons. Authors＇ recent researches reveal that astrocytes vary the synchronization threshold and provide an appropriate feedback control in stabilizing neural activities. In this study, we propose an astrocyte-inspired controller for desynchronization of two coupled limit-cycle oscillators as a minimal network model. The design procedure consists of two parts. First, based on the astrocyte model, the structure of the dynamic controller is suggested. Then, to have an emcient controller, parameters of controller are tuned through an optimization algo- rithm. The proposed bio-inspired controller takes advantages of three important proper- ties：（1） the controller desynchronizes the oscillators without any undesirable effects （e.g. stopping, annihilating or starting divergent oscillations）; （2） it consumes little effort to preserve the desirable desynchronized state; and （3） the controller is robust with respect to parameters＇ variations. Simulation results reveal the ability of the proposed controller.

关键词： Astrocyte dynamic model bio-inspired controller coupled limit-cycle oscillators desynchronization optimization

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On mitigating hop-to-hop congestion problem in IoT enabled Intra-Vehicular communication

On mitigating hop-to-hop congestion problem in IoT enabled I...

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International Conference on Software engineering and computer systems (ICSECS)

作者： Md. Arafatur Rahman Muhammad Nomani Kabir Saiful Azad Jahan Ali IBM Center of Excellence University Malaysia Pahang Malaysia Faculty of Computer Systems and Software Engineering University Malaysia Pahang Malaysia Faculty of Information and Communication Technology University Tunku Abdul Rahman Malaysia

Internet of Things enabled Intra-Vehicular Network (IVN) refers to the network where large number of sensors are connected with each other for sharing the vehicle's status information in order to develop a smart vehicular system. The number of sensor nodes in the vehicle has increased significantly due to the increasing vehicular applications. The phenomenon of congestion poses a problem in the IVN where the traffic load and number of sensors are increased. This problem can be resolved by mitigating the limitation of the existing Media Access Control (MAC) protocols. In this paper, we address this issue and proposed a MAC strategy for solving this problem in this network. Furthermore, we discuss the design of IVN scenario and the performance is evaluated in terms of end-to-end delay. The simulation results reveal the effectiveness of our proposal.

关键词： Sensors Media Access Protocol Wireless sensor networks Vehicles Delays Niobium

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A New Single-stage High-efficiency Photovoltaic(PV)/Grid-interconnected DC Charging System for Transportation Electrification

A New Single-stage High-efficiency Photovoltaic(PV)/Grid-int...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Siddhatha A. Singh Najath A. Azeez Sheldon S. Williamson Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineerin g Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineering

ISBN: (纸本)9781479917631

In this paper, a single stage highly efficient photovoltaic grid interconnected charging infrastructure has been designed for off-board DC charging for electric vehicles. This paper starts with the design of a single phase H-bridge quasi-z-source inverter (qZSI), component design and the pulse width modulation technique used. Then it discusses the control techniques used to control the power flow from the photovoltaic to the grid. The versatile qZSI topology has been used for the battery charging system using traditional controls to connect a 2 kW solar array to the AC grid. An EV battery charger has been then designed using the highly efficient full bridge DC-DC converter employing primary side Zero Voltage Switching (ZVS) using the LLC topology for a wide output voltage range. Finally, the simulated performances of the power flow have been shown with and without the EV battery charger.

关键词： Batteries Charging Dc-dc converters Electric energy storage Power electronics Resonant converters Transportation electric energy storage CHARGING(ACCOUNTTNG) charging BATTERY CHARGERS Power electronics transport Power flow Batteries DC converter DC to DC converters resonant converter DC-DC power convertors Zero voltage switching Electric vehicles fare collection system

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Standalone DC Level-1 EV Charging using PV/Grid Infrastructure, MPPT Algorithm and CHAdeMO Protocol

Standalone DC Level-1 EV Charging using PV/Grid Infrastructu...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Vamsi Krishna Pathipati Najath Abdul Azeez Sheldon S. Williamson Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineerin g Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineering

ISBN: (纸本)9781479917631

This paper presents an approach of DC level 1 charging of an electric vehicle (EV) or plug-in hybrid electric vehicle (PHEV) making use of standalone solar photovoltaic (PV) system. In this approach it is proposed to use the DC power generated by solar panels to directly charge EV traction battery pack using solar MPPT controller algorithm and CHAdeMO DC fast charging protocol. A supervisory control algorithm is developed to handle the standalone solar conditions. With the proposed solution, any EV users with CHAdeMO DC fast charging port can charge their vehicle. An example of commercially available EV 'Nissan Leaf' is considered for explaining the solution with 1 kW solar PV system. An average daily commuter distance is considered along with the survey data of different demographic solar energy harvesting capability. Calculations are made to prove that this solution can charge EVs off-the-grid, hence zero running cost.

关键词： Batteries Charging Energy storage systems Solar energy Power electronics Transportation CHARGING(ACCOUNTTNG) charging Electric vehicles Power electronics Solar Energy Batteries transport Cache Memory System DC power supply energy storage Energy storage systems direct current maximum power point trackers fast charging Solar collectors

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Analysis of Series-Parallel Resonant Inductive Coupling Circuit using the Two-port Network Theory

Analysis of Series-Parallel Resonant Inductive Coupling Circ...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Kunwar Aditya Mohamed Youssef Sheldon S. Williamson Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineerin g Smart Transportation Electrification and Energy Research (STEER) Group Advanced Storage Systems and Electric Transportation (ASSET) Laboratory UOIT-Automotive Center of Excellence (UOIT-ACE) Department of Electrical Computer and Software Engineering

ISBN: (纸本)9781479917631

In this paper thorough analysis of Series-Parallel resonant inductive coupling (SPRIC) has been presented using two-port network theory. Characteristic of SPRIC has been derived and plotted against load variation and frequency variation in MATLAB. Concept of forced resonance and natural resonance has been discussed. Important expressions such as current transfer ratio, voltage transfer ratio, maximum efficiency etc. has been derived and presented. To study the circuit behavior of the SPRIC a prototype has been built in the lab. Experimental results along with simulation results has been presented to verify the derived expression and characteristics of series-parallel topology.

关键词： Circuit theory Electric vehicles Inductive energy storage Magnetic resonance Quality factor Circuit theory Electric vehicles Quality factor Magnetic Resonance series-parallel inductive energy storage Resonant inductive coupling two-port networks natural resonance load changes Frequency variation

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An efficient remote mutual authentication scheme using smart mobile phone over insecure networks

An efficient remote mutual authentication scheme using smart...

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International Conference on Cyber Situational Awareness, Data Analytics and Assessment (CyberSA)

作者： Ruhul Amin S K Hafizul Islam G. P. Biswas Muhammad Khurram Khan Dept. Of Computer Science & Engineering Indian School of Mines Jharkhand India Dept. of Computer Science and Information Systems Birla Institute of Technology and Science India Center of Excellence in Information Assurance King Saud University Riyadh Saudi Arabia

To establish a secure connection between a mobile user and a remote server, this paper presents a session key agreement scheme through remote mutual authentication protocol by using mobile application software(MAS). We analyzed the security of our protocol informally, which confirms that the protocol is secure against all the relevant security attacks including off-line identity-password guessing attacks, user-server impersonation attacks, and insider attack. In addition, the widely accepted simulator tool AVISPA simulates the proposed protocol and confirms that the protocol is SAFE under the OFMC and CL-AtSe back-ends. Our protocol not only provide strong security against the relevant attacks, but it also achieves proper mutual authentication, user anonymity, known key secrecy and efficient password change operation. The performance comparison is also performed, which ensures that the protocol is efficient in terms of computation and communication costs.

关键词： Protocols Servers Authentication Smart cards Law

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Terahertz waveguide sensor for small volume liquid samples

Terahertz waveguide sensor for small volume liquid samples

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International Conference on Infrared, Millimeter, and Terahertz Waves

作者： A. Soltani H. Neshasteh A. Mataji-Kojouri N. Born Jan C. Balzer M. Shahabadi E. Castro-Camus M. Koch Faculty of Physics and Materials Science Center Structure and the Technology Research Laboratory Philipps University 35032 Marburg Germany Photonics Research Lab. Center of Excellence for Applied Electromagnetics Systems School of Electrical and Computer Engineering University of Tehran Tehran Iran Centro de Investigaciones en Optica A.C. Loma del Bosque 115 Lomas del Campestre Leon GTO Mexico 47150

We demonstrate a refractive index sensor for liquid samples for the THz range. The sensor presents a refractive index dependent resonance which shifts in frequency at a rate that exceeds 500 GHz/RIU. The simple struct... 详细信息

ISBN: (纸本)9781467384865

关键词： terahertz wave detectors liquids refractive index liquids complex refractive index terahertz wave detectors Sensors terahertz Industrial applications THZ RANGE

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