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International Conference on Electrical engineering/electronics, computer, Telecommunications and Information technology

作者： Jaraspat La-inchua Sorawat Chivapreecha Suttipong Thajchayapong Department of Telecommunication Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand National Electronic and Computer Technology Center (NECTEC) National Science and Technology Development Agency Pathumthani 12120 Thailand

ISBN: (纸本)9781479905461

This paper presents a system to detect lane-blocking traffic incidents which are amongst major causes of traffic jam. The proposed system uses fuzzy logic to identify traffic status as normal and abnormal. Mean speed and standard deviation of inter-arrival time are used as inputs to the fuzzy inference system (FIS), and then, the majority voting is applied to the outputs of FIS to improve detection rate and mean time to detection. Furthermore, based on simulation results, we show that the proposed lane-blocking detection system is very suitable for real-time implementation.

关键词： Anomaly detection traffic incident detection fuzzy logic intelligent transpostation systems

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Modeling the effect of process variations on the delay and power of the digital circuit using fast simulators

Modeling the effect of process variations on the delay and p...

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Iranian Conference on Electrical engineering (ICEE)

作者： Amirali Amirsoleimani H. Soleimani A. Ahmadi M. Bavandpour M. Zwolinski Electrical Engineering Department Razi University Kermanshah Iran Faculty of Electrical Engineering Sharif University of Technology Tehran Iran School of Electronic and Computer Science University of Southampton Southampton UK

ISBN: (纸本)9781467356329

Process variation has an increasingly dramatic effect on delay and power as process geometries shrink. Even if the amount of variation remains the same as in previous generations, it accounts for a greater percentage of process geometries as they get smaller. So an accurate prediction of path delay and power variability for real digital circuits in the current technologies is very important; however, its main drawback is the high runtime cost. In this paper, we present a new fast EDA tool which accelerates Monte Carlo based statistical static timing analysis (SSTA) for complex digital circuit. Parallel platforms like Message Passing Interface and POSIX ® Threads and also the GPU-based CUDA platform suggests a natural fit for this analysis. So using these platforms, Monte Carlo based SSTA for complex digital circuits at 32, 45 and 65 nm has been performed. and of the pin-to-output delay and power distributions for all basic gates are extracted using a memory lookup from Hspice and then the results are extended to the complex digital circuit in a hierarchal manner on the parallel platforms. Results show that the GPU-based platform has the highest performance (speedup of 19×). The correctness of the Monte Carlo based SSTA implemented on a GPU has been verified by comparing its results with a CPU based implementation.

关键词： Delays Integrated circuit modeling Digital circuits Monte Carlo methods Instruction sets Graphics processing units Logic gates

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Impact of Rotor Pole Number on the Characteristics of Outer-rotor Hybrid Excitation Flux Switching Motor for In-wheel Drive EV

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Procedia technology 2013年 11卷 593-601页

作者： M.Z. Ahmad E. Sulaiman Z.A. Haron T. Kosaka Faculty of Electrical & Electronic Eng. Universiti Tun Hussein Onn Malaysia Bt. Pahat 86400 Johor Malaysia Department of Electrical and Computer Engineering Nagoya Institute of Technology (NIT) Nagoya Japan

This paper present the impact of rotor pole number on the characteristics of outer-rotor hybrid excitation flux switching motor (ORHEFSM) for in-wheel drive electric vehicle (EV) applications. In recent years, researches on in-wheel motor for EV drivetrain system become more popular due to their several advantages of independent wheel controllability and higher efficiency. In addition, it provides more cabin space caused by elimination of mechanical transmission gears as conventionally use in the most of existing EV with single motor propulsion system configuration. Moreover, the proposed motor has single piece of rotor making the motor more robust and suitable for high speed applications. Under some design restrictions and specifications, design principles and initial performances of the proposed motor at various rotor pole numbers with 12 stator slots are demonstrated. Initially, the coil arrangement tests are examined to confirm the operating principle and polarity of each armature coil phase of the proposed motor. Furthermore, the profile of flux linkage, induced voltage, cogging torque and torque characteristics at various field excitation current density conditions are analyzed based on 2D- finite element analysis (FEA). The results obtained show that the appropriate combination of stator slot-rotor pole configurations are 12S-10P which initially provide highest torque and power density. Thus, by further design refinement and optimization it is expected that the motor will successfully achieved the target performances.

关键词： Outer-rotor hybrid excitation flux switching motor field excitation coil electric vehicle propulsion in-wheel drive

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Integrated Control in High-Speed Networks using constrained Model Predictive Control

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IFAC Proceedings Volumes 2013年第13期46卷 284-289页

作者： S.M. Mwandosya M. Brdys Department of Electronic Electrical and Computer Engineering College of Engineering and Physical Sciences University of Birmingham Edgbaston Birmingham B15 2TT UK Department of Control Systems Engineering Faculty of Electrical and Control Engineering Gdańsk University of Technology Gdańsk Poland

This paper studies congestion control in high-speed communication networks using Model Predictive Control (MPC). Network traffic is assumed to consist of best-effort and priority traffic sources. An integrated controller consisting of two control parts is designed. The controller calculates the capacity for priority sources and the input rate of best-effort sources. MPC is desirable as it can take into account the constraints on the finite buffer and input rate, as well as deal very well with systems with time delays.

关键词： Congestion Control High-Speed networks MPC Constraints Prediction

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A review of Genetic Algorithms and Parallel Genetic Algorithms on Graphics Processing Unit (GPU)

A review of Genetic Algorithms and Parallel Genetic Algorith...

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IEEE International Conference on Control System, Computing and engineering (ICCSCE)

作者： Fauzi Mohd Johar Farah Ayuni Azmin Mohamad Kadim Suaidi Abdul Samad Shibghatullah Badrul Hisham Ahmad Siti Nadzirah Salleh Mohamad Zoinol Abidin Abd Aziz Mahfuzah Md Shukor Faculty of Electronic and Computer Engineering Faculty of Information and Communication Technology Universiti Teknikal Malaysia Melaka (UTeM) Melaka Malaysia Universiti Teknikal Malaysia Melaka - Kampus Bandar Ayer Keroh Melaka MY

Genetic Algorithms (GAs) is proven to be effective in solving many optimization tasks. GAs is one of the optimization tools used widely in solving problems based on natural selection and genetics. This paper is intended to cover the study of GA and parallel GA and analyses its usage in CPU and GPU. One of the popular ways to speed up the processing time was by running them as parallel. The idea of parallel GAs may refer to an algorithm that works by dividing large problem into smaller tasks. Broad literature review in this paper includes a categorization of the GA operations that involved with some theories and techniques used in GA, presented with the aid of diagrams. This review attempts to study and analyse the behaviour of GA and parallel GA categories to work in GPU depending on the type of genetic algorithm. Parallel GA for GPU covers the architecture of Compute Unified Device Architecture (CUDA).

关键词： Graphics processing units Genetic algorithms Sociology Statistics Biological cells Central Processing Unit Instruction sets

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Comparision of Multi-Carrier Techniques in Seven-Level Asymmetric Cascade Multilevel Inverter

Comparision of Multi-Carrier Techniques in Seven-Level Asymm...

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International Conference on Power engineering, Energy and Electrical Drives

作者： Ilhami COLAK Ersan KABALCI Gokhan KEVEN Faculty of Technology Department of Electric & Electronic Engineering Gazi University Ankara Turkey Faculty of Engineering & Architecture Dep. of Electrical & Electronic Eng. Nevsehir University Nevsehir Turkey Vocational College of Haci Bekta? Veli Dep. of Computer Programming Nevsehir University Nevsehir Turkey

ISBN: (纸本)9781467363914

The multilevel inverters (MLIs) are classified into three topologies such as Diode Clamped, Flying Capacitor and Cascade Multilevel Inverter (CMLI). CMLI topologies include two kind of structure that is named symmetric and asymmetric topologies. Asymmetric Cascade MLI (ACMLI) topologies consist of unequal DC sources. Many modulation techniques have been used in ACMLI topology such as Multi-Carrier PWM (MC-PWM), Space Vector PWM and Selective Harmonic PWM. The MC-PWM technique is achieved by four different types. In this study, MC-PWM techniques which are named Phase Disposition PWM, Phase Opposition Disposition PWM, Alternate Phase Opposition Disposition PWM and Phase Shifted PWM have been compared. It is uncovered that Phase Opposition Disposition PWM technique is more convenient in terms of Total Harmonic Distortion of output voltage and current signals and in terms of the quality of power factor in ACMLI which is performed in this study.

关键词： asymmetric cascade multilevel inverter multi carrier PWM THD frequency index power factor

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Investigation on Flux Characteristics of Field Excitation Flux Switching Machine with Single FEC Polarity

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Procedia technology 2013年 11卷 572-579页

作者： E.Sulaiman M.F.M. Teridi Z.A. Husin M.Z. Ahmad T. Kosaka Faculty of Electrical & Electronic Eng. Universiti Tun Hussein Onn Malaysia Bt. Pahat 86400 Johor MALAYSIA Department of Electrical and Computer Engineering Nagoya Institute of Technology (NIT) Nagoya466-8555 JAPAN

Flux switching machines (FSMs) that consist of all flux sources in the stator have been developed in recent years due to their definite advantage of single piece robust rotor structure suitable for high speed applications. They can be categorized into three groups that are permanent magnet (PM) FSM, field excitation (FE) FSM, and hybrid excitation (HE) FSM. Both PMFSM and FEFSM has only PM and field excitation coil (FEC), respectively as their main flux sources, while HEFSM combines both PM and FECs. Among these FSMs, the FEFSM offers advantages of low cost, simple construction and variable flux control capabilities suitable for various performances. In this paper, design study and flux interaction analysis of 24S-10P FEFSM with single direction of FEC winding is presented. Initially, design procedures of the FEFSM including parts drawing, materials and conditions setting, and properties setting are explained. Then, coil arrangement tests are examined to confirm the machine operating principle and position of each armature coil phase. Finally, the flux interaction between DC FEC and armature coil, FEC flux capabilities at various current condition, and initial torque are also investigated.

关键词： Field excitation flux switching machine DC filed excitation coil single FEC polarity

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Effects of rate control, bridging and antenna orientation on IEEE 802.11n link performance: An experimental analysis

Effects of rate control, bridging and antenna orientation on...

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IEEE International Conference on Telecommunications and Malaysia Communications (ICT-MICC)

作者： Ammar Anuar Seh Chun Ng Mun Leong Chan Seyed Dawood Sajjadi Torshizi David Chieng Alvin Ting Kim Chuan Lim Yewguan Soo Wireless Communications Cluster MIMOS Berhad Technology Park Malaysia Kuala Lumpur Malaysia Faculty of Electronic and Computer Engineering Universiti Teknikal Malaysia Melaka (UTeM) Melaka Malaysia

In this paper we present a set of network experiments on IEEE 802.11n link constructed with open source software and commercially available hardware. Most existing works focus on optimizing MAC layer parameters in order to improve the link performance. In this paper, we investigate several “non-MAC” performance impacting factors, which are usually overlooked by the research community. The experiments were carried out in an indoor office environment over a relatively clean 5GHz band. Our experiments reveal that factors such as (i) rate control mechanism, (ii) bridging and (iii) antenna orientation can significantly impact the link performance.

关键词： Bridges Throughput Antennas IEEE 802.11n Standard Wireless communication MIMO Routing protocols

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Softly Switched Robustly Feasible Model Predictive Control for Nonlinear Network Systems

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IFAC Proceedings Volumes 2013年第13期46卷 200-205页

作者： Vu Nam Tran Mietek A. Brdys Depeartment of Electronic Electrical and Computer Engineering University of Birmingham Edgbaston Birmingham B15 2TT UK Department of Control Systems Engineering Faculty of Electrical and Control Engineering Gdansk University of Technology ul. Narutowicza 11/12 80 – 233 Gdansk Poland

It is common that an efficient constrained plant operation under full range of disturbance inputs require meeting different sets of control objectives. This calls for application of model predictive controllers each of them being best fit into specific operating conditions. It further requires that not only designing robustly feasible model predictive controllers is needed to satisfy the real plant state/output constraints, but also a switching mechanism between these controllers during the operation is inevitable. A simple hard switching may introduce unwanted transients and more importantly may not achieve robustly feasible controller operation. In this paper, the soft switching method for nonlinear systems that allows switching between robustly feasible model predictive controllers is presented. The algorithm for the fast switching method is also addressed for the switching mechanism parameter design that minimizes that switching time duration. The method is illustrated by the application to hydraulic optimizing control in the Drinking Water Distribution Systems example. Copyright © 2013 IFAC

关键词： Switched system invariant sets model predictive control constraints leakage

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Broadband Photon Harvesting Capability Enhancement with Plasmonic Inspired Nanostructure based Solar Cell

Broadband Photon Harvesting Capability Enhancement with Plas...

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IEEE Photovoltaic Specialists Conference

作者： Md. Ibrahim Khalil Atiqur Rahman Arshad M Chowdhury Nowshad Amin Gee-Kung Chang Department of Electrical Engineering and Computer Science North South University Dhaka Bangladesh Department of Electrical Electronic Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 Bangi Selangor Malaysia School of Electrical and computer Engineering Georgia Institute of Technology Atlanta GA USA

ISBN: (纸本)9781479933006

Efficient light trapping in a solar cell can improve the overall performance and substantially reduce its cost. Even though thin-film photovoltaic (PV) offers significant cost reduction compared to traditional bulky thick film Photovoltaics, the overall performance is not optimal due to low absorption. Plasmonic light trapping techniques introduced recently in photovoltaics can provide better light absorption without increasing the device thickness. In this paper, we propose and demonstrate a simple plasmonic nanostructure based crystalline silicon (C-Si) solar cell by integrating the silver core with Silicon Nanowire (NW) to increase the overall absorption efficiency. We have found by numerical simulation and 3-D Electromagnetic modeling that for fixed filling ratio and length the proposed structure demonstrates 64% improvement in ultimate efficiency and current density compared to the conventional NW structures up to 300nm lattice constant.

关键词： photovoltaic surface plasmon subwavelength structures nanostructures

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