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On the performance of generalized likelihood ratio test for data-aided timing synchronization of MIMO systems

On the performance of generalized likelihood ratio test for ...

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International Conference on Communications (COMM)

作者： Yi Zhou Erchin Serpedin Khalid Qaraqe Octavia Dobre Department of Electrical Engineering Texas A and M University College Station TX USA Electrical Engineering Program Texas A and M University Qatar Doha Qatar Faculty of Engineering and Applied Science Memorial University Canada

This paper studies the performance of the generalized likelihood ratio test (GLRT) proposed in [1] in the context of data-aided timing synchronization for multiple-input multiple-output (MIMO) communications systems and flat-fading channels. Herein paper, the asymptotic performance of the GLRT test is derived, and an upper bound for the detection probability is provided and shown to behave well as a benchmark for sufficiently large number of observations. Computer simulations are presented to corroborate the developed analytical performance benchmarks. In addition, choice of some system design parameters to improve the synchronization performance is discussed via computer simulations.

关键词： Synchronization MIMO Probability density function Fading Vectors Maximum likelihood estimation

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Effect of musical tones in auditory perception analysis using nonlinear model

Effect of musical tones in auditory perception analysis usin...

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Biomedical engineering International Conference (BMEiCON)

作者： Pongphan Pongpanitanont Wichian Sittiprapaporn Warakorn Charoensuk Department of Biomedical Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand Department of Electrical Engineering Faculty of Engineering Mahidol University Nakhon Pathom Thailand Office of the Doctoral Degree Program Studies in Education/Faculty of Education Mahasarakham University Mahasarakham Thailand

ISBN: (纸本)9781467348904

This paper studies the application of the non-linear model (ANN, ANFIS). ANN and ANFIS were used to fit a Blood-Oxygen Level Dependent (BOLD) signal with design architecture. A model proposes to define region of interest (ROI) in brain fMRI images. The result shows the ANFIS model can be represent to fit the BOLD data better than ANN. Three paradigms were stimulated at difference issue activation in specific parameter (activation time, duration and signal strength). In this case a higher frequency and amplitude paradigm has stimulated on the brain area activation faster and more frequently.

关键词： Education Analytical models Oxygen Biomedical imaging Image resolution Equations Mathematical model

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Performance analysis of adaptive power control based on Signal to Interference Ratio (SIR) using fuzzy genetic for WCDMA

Performance analysis of adaptive power control based on Sign...

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International Conference on Digital Information and Communication Technology and it's Applications (DICTAP)

作者： Firdaus Ali Muayyadi Rina Puji Astuti Dept. of Electrical Engineering Faculty of Industrial Technology UII Yogyakarta Indonesia Master Program on Telecommunication Engineering Telkom Institute of Technology Bandung Indonesia

The number of active users in a cell in the WCDMA system is very limited and influenced by co-channel interference and fading radio channels. Power control is needed to reduce interference by reducing the effects of near-far problem, co-channel interference and fading channels. WCDMA system is required power control that works fast and precisely because radio channels are changing randomly. Fuzzy Genetic Algorithm (FGA) gives the correct solution to the dynamic decision making problem under non-linear conditions, based on simple rules. This paper presents application of adaptive SIR based power control using the FGA on uplink WCDMA system, and compared to fixed step size method using computer simulation. The results confirmed that use of FGA on the SIR-based Power Control for WCDMA systems increases the number of active users while maintaining QoS standards. This is shown by the decline in value of outage probability compared to fixed step methods. Average outage probability at fixed power control step is 0.270036 while the FGA power control is 0.18465.

关键词： Power control Multiaccess communication Genetic algorithms Spread spectrum communication Tin Fading Manganese

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Early flood alerts using Short Message Service (SMS)

Early flood alerts using Short Message Service (SMS)

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2012 International Conference on System engineering and Technology, ICSET 2012

作者： Kuantama, Endrowednes Setyawan, Leonardy Darma, Jessie Department of Electrical Engineering Faculty of Industrial Technology Universitas Pelita Harapan Undergraduate Program: JL. M.H. Thamrin Boulevard Lippo Karawaci Tangerang 15811 Indonesia Graduate Program: Plaza Semanggi JL. Jend. Sudirman Kav.50 Jakarta 12930 Indonesia

ISBN: (纸本)9781467323765

Early flood alerts system is use to create a tool to measure water level, which powered by solar cell panel. The system is supported by microcontroller and GSM modem to send the measured data via SMS (Short Message Service) into two specific clients' phone numbers that have previously been inputted into the system. Besides the capability to predict the remaining time before the flood, this system can also detect three types of water level: early flood level, flood level and low tide level after the flood with a maximum water level detection of four meters. This system focused on an accurate measurement of the height of the water level and sending a warning message of the threshold height set before to the clients. For each of water level, the system will send three messages for each client number. The setting for client phone numbers and the water level can be programmed by sending the SMS that has been formatted in the system. The early flood alerts system is based on ATMEL AT89S51 microcontroller and the measurement of the water level is processed by ultrasonic HC-SR04. © 2012 IEEE.

关键词： Water levels

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Application of UPFC to improve the LVRT capability of wind turbine generator

Application of UPFC to improve the LVRT capability of wind t...

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Australasian Universities Power engineering Conference, AUPEC

作者： Yasser M. Alharbi A. M. Shiddiq Yunus A. Abu Siada Electrical and Computer Engineering Department Curtin University of Technology Perth Australia Mechanical Engineering Department Energy Conv. Study Program State of Polytechnic Ujung Pandang Makassar Indonesia

Variable speed wind turbine generators installation has been significantly increased worldwide in the last few years. Voltage sag at the grid side may call for the disconnection of the wind turbine from the grid as under such faults it may not comply with the recent developed grid codes for wind energy conversion systems (WECS). In this paper, a Unified Power Flow Controller (UPFC) is applied to improve the low voltage ride through (LVRT) capability of doubly fed induction generator (DFIG)-based WECS during voltage sag at the grid side. Simulation is carried out using MATLAB/Simulink software. Results show that UPFC can significantly improve the LVRT capability of DFIG-based WECS and hence maintaining wind turbine connection to the grid during certain levels of voltage sag at the grid side.

关键词： Voltage fluctuations Wind turbines Reactive power Voltage control Power system stability Generators Wind energy

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Design and construction of remote-controlled quad-copter based on STC12C5624AD

Design and construction of remote-controlled quad-copter bas...

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2012 International Conference on System engineering and Technology, ICSET 2012

作者： Jeremia, Stevie Kuantama, Endrowednes Pangaribuan, Julinda Department of Electrical Engineering Faculty of Industrial Technology Universitas Pelita Harapan Undergraduate Program: JL. M.H. Thamrin Boulevard Lippo Karawaci Tangerang 15811 Indonesia Graduate Program: Plaza Semanggi JL. Jend. Sudirman Kav. 50 Jakarta 12930 Indonesia

ISBN: (纸本)9781467323765

Quad-copter is a copter equipped with four motors and propellers, faced to top side, placed vertically and opposite each other propeller. Physically, quad-copter resembles a plus sign form, where each motors placed on edge of the plus sign. The quad-copter design reported in the thesis uses microcontroller STC12C5624AD, electronic speed controllers, brushless DC motors, 3000mAh Lithium-Polymer Battery Packs, propellers, ADXL345 accelerometer module, signal receiver module, and remote controller. Using a 2.4GHz remote controller, the control signal will be received by the receiver module, and then processed by the microcontroller. The accelerometer module acts as balancer of the quad-copter that could reset the quad-copter to its initial position and detects tilt position in 3-axes (x, y, and z axis). After receiving input signal from remote control and accelerometer module, the microcontroller will generate final decision to operate motor stably. Combination of four main motors, accelerometer, and microcontroller produce a cost-effective quad-copter that can fly stably indoor and outdoor. This thesis reports design and construction of the remote-controlled quad-copter. This work, not only applies theories that author have learned, but also could be useful for real life in the future. © 2012 IEEE.

关键词： Brushless DC motors

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Impact of intermittent misfire and fire-through on the performance of full converter based WECS

Impact of intermittent misfire and fire-through on the perfo...

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Australasian Universities Power engineering Conference, AUPEC

作者： A. M. Shiddiq Yunus M. A. S. Masoum A. Abu Siada Mechanical Engineering Department Energy Conv. Study Program State of Polytechnic Ujung Pandang Makassar Indonesia Electrical and Computer Engineering Department Curtin University of Technology Perth Australia

The integration of wind turbines into modern power grids has significantly increased during the last decade. The wind turbine equipped with full converter based wind energy Conversion System (FCWECS) represented about 20.3% of the worldwide total wind capacity in 2003. Since FCWECS is equipped with a voltage source inverter (VSI), it is vulnerable that misfire and fire-through may occur within the VSI switches. In this paper, impact of these switching malfunctions on FCWECS performance is investigated and discussed. Detailed simulations of the system under study are carried out using Matlab/Simulink to highlight the influence of these converter internal faults on PCC voltage, DC link voltage and shaft speed, as well as generator active and reactive power. Furthermore, compliance of the FCWECS with Spain fault ride through (FRT) grid codes is also investigated.

关键词： Inverters Wind turbines Generators Educational institutions Reactive power Voltage fluctuations Insulated gate bipolar transistors

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Performance of optical flow techniques for motion analysis of fluorescent point signals in confocal microscopy

Performance of optical flow techniques for motion analysis o...

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作者： Delpiano, José Jara, Jorge Scheer, Jan Ramírez, Omar A. Ruiz-Del-Solar, Javier Härtel, Steffen Department of Electrical Engineering Faculty of Physical and Mathematical Sciences University of Chile Av. Beauchef 850 Santiago Chile Faculty of Engineering and Applied Sciences University of the Andes Av. San Carlos de Apoquindo 2200 Santiago Chile Program of Anatomy and Developmental Biology University of Chile Independencia 1027 Santiago Chile Department of Computer Sciences Faculty of Physical and Mathematical Sciences University of Chile Av. Beauchef 850 Santiago Chile

Optical flow approaches calculate vector fields which determine the apparent velocities of objects in timevarying image sequences. They have been analyzed extensively in computer science using both natural and synthetic video sequences. In life sciences, there is an increasing need to extract kinetic information from temporal image sequences which reveals the interplay between form and function of microscopic biological structures. In this work, we test different variational optical flow techniques to quantify the displacements of biological objects in 2D fluorescent image sequences. The accuracy of the vector fields is tested for defined displacements of fluorescent point sources in synthetic image series which mimic protein traffic in neuronal dendrites, and for GABABR1 receptor subunits in dendrites of hippocampal neurons. Our results reveal that optical flow fields predict the movement of fluorescent point sources within an error of 3% for a maximum displacement of 160 nm. Displacement of agglomerated GABABR1 receptor subunits can be predicted correctly for maximum displacements of 640 nm. Based on these results, we introduce a criteria to derive the optimum parameter combinations for the calculation of the optical flow fields in experimental images. From these results, temporal sampling frequencies for image acquisition can be derived to guarantee correct motion estimation for biological objects. © 2011 Springer-Verlag.

关键词： Fluorescence

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A self-adaptive differential evolution algorithm for transmission network expansion planning with system losses consideration

A self-adaptive differential evolution algorithm for transmi...

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National Proceedings Power and Energy Conference (PECon)

作者： Thanathip Sum-Im Weerakorn Ongsakul Department of Electrical Engineering Faculty of Engineering Srinakharinwirot University Nakhon Nayok Thailand Energy Field of Study School of Environment Resources and Development Asian Institute of Technology Pathumthani Thailand

In this paper, a self-adaptive differential evolution algorithm (SaDEA) is applied directly to the DC power flow based model in order to efficiently solve transmission network expansion planning (TNEP) problem. The purpose of TNEP is to minimize the transmission investment cost associated with the technical operation and economical constraints. The TNEP problem is a large-scale, complex and nonlinear combinatorial problem of mixed integer nature where the number of candidate solutions to be evaluated increases exponentially with system size. In addition, the TNEP problem with system losses consideration is also investigated in this paper. The efficiency of the proposed method is initially demonstrated via the analysis of low and medium complexity transmission network test cases. A detailed comparative study among conventional genetic algorithm (CGA), tabu search (TS), artificial neural networks (ANNs), hybrid artificial intelligent techniques and the proposed method is presented. From the obtained experimental results, the proposed technique provides the accurate solution, the feature of robust computation, the simple implementation and the satisfactory computational time.

关键词： Vectors Planning Load flow Sociology Statistics Optimization Power transmission lines

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Load modeling for fault location in distribution systems with distributed generation

Load modeling for fault location in distribution systems wit...

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IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： A. Herrera-Orozco S. Pérez-Londoño J. Mora-Flórez Faculty of Engineering in the Master's program in Electrical Engineering scholarship holder of the Universidad Tecnológica de Pereira Pereira Colombia Universidad Tecnologica de Pereira Pereira CO Professor in the Faculty of Electrical Engineering Universidad Tecnológica de Pereira Pereira Colombia

This paper shows the influence of the load modeling in the behavior of voltage (V), current (I) and impedance (Z) measurements during pre-fault and fault steady states of power distribution systems. The test system is the 24.9 kV IEEE 34 nodes power distribution system, modeled by ATP software, considering load models as constant impedance, constant current, constant power and hybrid load composed using the previous three models. All loads were coded using Models of ATP. As result of the test, a comparative analysis of the signals of V and I measurements and also Z as seen from the power substation is performed. The result shows that the load model affects the fault steady state of the power distribution system, which directly will influence the fault locator performance, since this uses the measurements of V and I at the power substation at pre-fault and fault steady states.

关键词： Load modeling Integrated circuit modeling Circuit faults Impedance Steady-state Power distribution Analytical models

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