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Capacitance multipliers using tunable four terminal floating nullors

Capacitance multipliers using tunable four terminal floating...

7th Annual International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Jaikla, Winai Lahiri, Abhirup Siripruchyanun, Montree Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Dusit Bangkok Thailand Division of Electronics and Communications Netaji Subhas Institute of Technology Delhi India Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut's University of Technology North Bangkok Bangsue Bangkok Thailand

ISBN: (纸本)9789746724913

The paper presents new realization of grounded and floating capacitance multiplier circuits using tunable four-terminal floating nullors (TFTFNs). The resulting capacitance value is electronically tunable by means of two bias currents. The grounded capacitance multiplier uses one TFTFN and one grounded capacitor and the floating capacitance multipliers use two TFTFNs and one capacitor. The parasitic impedance effects on the proposed circuit are investigated. PSPICE simulation results are included which verify the workability of the proposed circuits.

关键词： Capacitance

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Friction feedforward compensation and position feedforward in CNC machines

Friction feedforward compensation and position feedforward i...

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7th Annual International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2010

作者： Suteeratanapirom, Wijin Rattanawaorahirankul, Rapeepong Laosapan, Chutima Sanposh, Peerayot Chayopitak, Nattapon Tungpimolrut, Kanokvate Kunieda, Hiroaki TAIST Tokyo Tech ICTES Program Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Intelligent Mechatronics Automation Robotics and Control Laboratory Department of Electrical Engineering Kasetsart University 50 Phahonyothin Rd. Ladyao Jatujak Bangkok 10903 Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center 112 Thailand Science Park Phahonyothin Rd. Klong 1 Klong Luang Pathumthani 12120 Thailand Department of Electrical and Electronic Engineering Tokyo Institute of Technology S3-65 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan

ISBN: (纸本)9789746724913

This research proposes a method to eliminate friction effect and reduced tracking error on CNC milling machines. A CNC milling machine has many connected mechanical components which have friction effects such as ball screws and rails. To control servo motors which are used to drive X-Y table in CNC milling machine, the conventional PID controller is widely used. In this research, Panasonic motor driver is set to the torque control mode. To compensate the friction effects, the friction feedforward compensation method is proposed. Moreover, to reduce the position tracking error, position feedforward controller is used. The simulation and implementation of position control in one axis of PID with Friction Feedforward Compensation and Position Feedforward Controller (FFC-PFC) are presented.

关键词： Friction

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A multi-source micro power generator employing thermal and vibration energy harvesting

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Procedia engineering 2010年 5卷 1176-1179页

作者： Hakan Töreyin Emre Topal Haluk Külah Middle East Technical University Department of Electrical and Electronics Engineering Ankara Turkey Middle East Technical University Micro and Nano Technologies Graduate Program Ankara Turkey METU-MEMS Research and Application Center Ankara TURKEY * Currently with School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta U.S.A.

This paper introduces a new cantilever type multi-source energy harvester generating electric power from both ambient heat and vibration. Harvesting energy from vibration was realized by electromagnetic conversion, whereas the energy generation from heat was supplied by making use of Seebeck effect of Cr–Al thermocouples implemented on the microcantilevers. The measured average Seebeck coefficient is 12 μV/K per thermocouple. A total voltage of 3.3 mV was generated from the thermoelectric part and 13.4 mV from the electromagnetic part of the device. Measured total power from the fabricated chip is 1.91 nW (1.12 nW from vibration, 0.79 nW from thermoelectric).

关键词： Energy harvesting Thermoelectric, electromagnetic Vibration Micro power generation

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Compact circularly-polarized microstrip array antenna

Compact circularly-polarized microstrip array antenna

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Antennas and Propagation Conference, LAPC, Loughborough

作者： Ahmed H. Abdelrahman Fatma Elhefnawi Atef Z. Elsherbeni Moataza Hendi Salwa Elramly Communication Team Egyptian Space Program National Authority슠for슠Remote Sensing and Space Sciences Cairo Egypt Microwave Department Electronic Research Institute Giza Egypt Center of Applied Electromagnetic System Research (CAESR) Department of Electrical Engineering University of Mississippi USA Electronics& Communications Engineering Department Faculty of Engineering Ain Shams University Cairo Egypt

This paper presents a compact circularly-polarized microstrip array antenna with four square patches fed in phase quadrature such that a phase shift of 90° between each neighbouring patches, thus providing circularly polarized pattern. The feeding network is placed on the opposite side of the patches' ground plane and is designed using three Wilkinson power dividers having different output lengths that achieve the required phase shift between patches.

关键词： Arrays Feeds Microstrip antenna arrays Microstrip antennas Microstrip Substrates

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Chi-Huang Chen Sheau-Ling Hsieh Yung-Ching Weng Wen-Yung Chang Feipei Lai Department of Electrical Engineering National Taiwan University Taipei Taiwan EECS International Graduate Program Institute IT Center National Chiao Tung University Hsinchu Taiwan Department of Computer Science and Engineering National Taiwan University Taiwan Institute of Computer Science and Engineering College of Computer Science National Chiao Tung University Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taiwan

Semantic similarity measure plays an essential role in Information Retrieval and Natural Language Processing. In this paper we propose a page-count-based semantic similarity measure and apply it in biomedical domains. Previous researches in semantic web related applications have deployed various semantic similarity measures. Despite the usefulness of the measurements in those applications, measuring semantic similarity between two terms remains a challenge task. The proposed method exploits page counts returned by the Web Search Engine. We define various similarity scores for two given terms P and Q, using the page counts for querying P, Q and P AND Q. Moreover, we propose a novel approach to compute semantic similarity using lexico-syntactic patterns with page counts. These different similarity scores are integrated adapting support vector machines, to leverage the robustness of semantic similarity measures. Experimental results on two datasets achieve correlation coefficients of 0.798 on the dataset provided by A. Hliaoutakis, 0.705 on the dataset provide by T. Pedersen with physician scores and 0.496 on the dataset provided by T. Pedersen et al. with expert scores.

关键词： Semantics Biomedical measurements Correlation Kernel Training Medical services Support vector machine classification

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High-input Impedance Voltage-mode Universal Filter Using CCCCTAs

High-input Impedance Voltage-mode Universal Filter Using CCC...

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electronics, Computer, Telecommunications and Information Technology International Conference on electrical engineering/electronics, Computer, Telecommunications and Information Technology

作者： Winai Jaikla Abhirup Lahiri Adisorn Kwawsibsame Montree Siripruchyanun Electric and Electronic Program Faculty of Industrial Technology Suan Sunandha Rajabhat University Dusit Bangkok THAILAND Part of the work done while the author was with Division of Electronics and Communications Netaji Subhas Institute of Tec hnology Electronics Department Lanna Polytechnical College Chiangmai Department of Teacher Training in Electrical Engineering Faculty of Technical Education King Mongkut's University of Technology North Bangkok

ISBN: (纸本)9781424456062

This article presents a voltage-mode universal biquadratic filter (low-pass, high-pass, band-pass functions), based on current controlled current conveyor transconductance amplifiers (CCCCTAs). The features of the circuit are that: the quality factor and pole frequency can be tuned orthogonally via the input bias currents: the circuit description is very simple, consisting of merely 3 CCCCTAs and 2 grounded capacitors. Without any external resistors, requiring no component matching conditions, and using only grounded elements, the proposed circuit is very appropriate to further develop into an integrated circuit. Moreover, the proposed circuit enables easy cascading in voltage-mode, due to high-input impedances. The PSPICE simulation results are depicted. The given results agree well with the theoretical anticipation. The power consumption is approximately 4.08mW at ±2.5V power supply voltages.

关键词： Impedance Band pass filters Tuned circuits Low pass filters Voltage control Transconductance Q factor Frequency Capacitors Resistors

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Web-based healthcare Hand Drawing Management System

Web-based healthcare Hand Drawing Management System

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Sheau-Ling Hsieh Yung-Ching Weng Chi-Huang Chen Kai-Ping Hsu Jeng-Wei Lin Feipei Lai EECS International Graduate Program Institute IT Center National Chiao Tung University Hsinchu Taiwan Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan Computer and Information Networking Center National Taiwan University Taipei Taiwan Department of Information Management Tunghai University Taichung Taiwan Graduate Institute of Biomedical Electronics and Bioinformatics National Taiwan University Taipei Taiwan

The paper addresses Medical Hand Drawing Management System architecture and implementation. In the system, we developed four modules: hand drawing management module; patient medical records query module; hand drawing editing and upload module; hand drawing query module. The system adapts windows-based applications and encompasses web pages by *** hosting mechanism under web services platforms. The hand drawings implemented as files are stored in a FTP server. The file names with associated data, e.g. patient identification, drawing physician, access rights, etc. are reposited in a database. The modules can be conveniently embedded, integrated into any system. Therefore, the system possesses the hand drawing features to support daily medical operations, effectively improve healthcare qualities as well. Moreover, the system includes the printing capability to achieve a complete, computerized medical document process. In summary, the system allows web-based applications to facilitate the graphic processes for healthcare operations.

关键词： Medical services Biomedical imaging Printing Conferences Web services Graphics Databases

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FPGA-based implementation of a CFAR processor using batcher's sort and LUT arithmetic

FPGA-based implementation of a CFAR processor using batcher'...

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2009 4th International Design and Test Workshop, IDT 2009

作者： Seddiq, Yasser M. Alshebeili, Saleh A. Alhumaidi, Sami M. Obied, Abdulfattah M. National Program of Electronics Comms. and Photonics KACST Riyadh Saudi Arabia Department of Electrical Engineering King Saud University Riyadh Saudi Arabia

ISBN: (纸本)9781424457489

This paper presents the realization of the forward automatic censored cell averaging detector (F-ACCAD), a novel CFAR algorithm for detecting targets in log-normal distribution clutter recently published in [1]. The algorithm is realized through an FPGA-based parallel architecture. The timing constraints of high resolution radar applications are considered and satisfied in the system. The sequential nature of the algorithm has been parallelized to achieve the desired processing delay. The intensive statistical calculations and the complexity of the algorithm have been significantly reduced by using lookup tables (LUTs). Batcher's sort, a parallel sorting algorithm, is adopted in this work. The hardware synthesis results and timing analysis are reported at the end. ©2009 IEEE.

关键词： Field programmable gate arrays (FPGA)

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Impulsive synchronization of chaotic systems via linear matrix inequality approach

Impulsive synchronization of chaotic systems via linear matr...

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2009 IEEE International Conference on Networking, Sensing and Control, ICNSC 2009

作者： Chu, Cheng-Feng Lin, Jui-Sheng Hung, Meei-Ling Liao, Teh-Lu Hou, Yi-You Department of Engineering Science National Cheng Kung University Tainan 701 Taiwan Department of Electrical Engineering Far East University Tainan 744 Taiwan Medical Electronics and Device Technology Center Southern Program Office Industrial Technology Research Institute Tainan 73445 Taiwan

ISBN: (纸本)9781424434923

The aim of this paper is to propose an impulsive controller which is to guarantee the asymptotic synchronization of the master and slave chaotic systems. The impulsive controller is derived on the basis of the Lyapunov theory and the linear matrix inequlity (LMI) technique. A numerical example is given to demonstrate the effectiveness of the main results. © 2009 IEEE.

关键词： Chaotic systems

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FPGA-based implementation of a CFAR processor using Batcher's sort and LUT arithmetic

FPGA-based implementation of a CFAR processor using Batcher'...

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International Design and Test Workshop

作者： Yasser M. Seddiq Sami M. Alhumaidi Saleh A. Alshebeili Abdulfattah M. Obied The National Program of Electronics Communication and Photonics KACST Riyadh Saudi Arabia Department of Electrical Engineering King Saud University Riyadh Saudi Arabia

ISBN: (纸本)9781424457489

This paper presents the realization of the forward automatic censored cell averaging detector (F-ACCAD), a novel CFAR algorithm for detecting targets in log-normal distribution clutter recently published . The algorithm is realized through an FPGA-based parallel architecture. The timing constraints of high resolution radar applications are considered and satisfied in the system. The sequential nature of the algorithm has been parallelized to achieve the desired processing delay. The intensive statistical calculations and the complexity of the algorithm have been significantly reduced by using lookup tables (LUTs). Batcher's sort, a parallel sorting algorithm, is adopted in this work. The hardware synthesis results and timing analysis are reported at the end.

关键词： Table lookup Arithmetic Radar detection Timing Detectors Log-normal distribution Clutter Parallel architectures Radar applications Delay

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