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International Conference on Harmonics and Quality of Power

作者： S. Arias-Guzman A.J. Ustariz-Farfan E.A. Cano Plata Electrical Electronic and Computer Engineering Program Universidad Nacional de Colombia Colombia

This paper introduces a new algorithm of polyphasic segmentation. This new algorithm combines the strength of the concept of voltage signal tensor with the benefits offered by the residual segmentation technique in order to generate a unique pattern of segmentation. This segmentation strategy is validated using a set of synthetic signals with voltage variation in the remnant voltage and the start point of the event. The proposed algorithm is tested using a set of real signals captured by a local network operator.

关键词： Voltage fluctuations Tensile stress Indexes Power quality Voltage measurement Algorithm design and analysis Kalman filters

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Variance Window Based Car License Plate Localization

Variance Window Based Car License Plate Localization

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The 3rd International Conference on Signal and Image Processing(CSIP 2014) & The 6th International Conference on Computational Intelligence and Software engineering(CiSE 2014)

作者： Jing Pang Department of Electrical & Electronic Engineering Computer Engineering Program California State UniversitySacramento CA USA

In this paper, a new method for discovering the candidate car license plate locations is presented. First, the image is decomposed using a Haar wavelet to get the HL band with vertical edges. Then, the HL band image is binarized using an Otsu threshold. Next a black top-hat algorithm is applied to reduce the effects of interfering large continuous features other than the license plate. At this time, a moving window based modified variance score calculation is made for areas with white pixels. This work found that the top 3 detected rectangle windows correctly locate the license plate regions with a success rate of about 98.2%. Moreover, the proposed method is robust enough to locate the plates in cases where the rough vehicle position has not been previously discovered and the cars are not centered in the image.

关键词： Harr Wavelet,Black Top-Hat,Binarization,Moving Window,Variance Score

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Power quality causes of failures in Colombia's Rural

Power quality causes of failures in Colombia's Rural

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International Conference on Harmonics and Quality of Power

作者： O.J. Soto Marín E.A. Cano Plata A.J. Ustariz-Farfan Electrical Electronic and Computer Engineering Program Universidad Nacional de Colombia Manizales Colombia

This paper undertakes the study of failures in energy meters installed in low-voltage power network. The objective is to find a way to reduce the high failure rate that this type of equipment currently presents in the eastern zone of the departmento de Caldas, especially in the areas of greatest keraunic level. The methodology implemented enables root cause analysis, the proposal of remedial actions and the validation of the proposed solutions.

关键词： Grounding Load modeling Voltage control Surge protection Surges Fault trees Insulators

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Applying Interdisciplinarity and Agile Methods in the Development of an Embedded System

Applying Interdisciplinarity and Agile Methods in the Develo...

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International Conference on Information Technology: New Generations (ITNG)

作者： Renan Cavichi de Freitas Jefferson Andrade de Oliveira Fabiano Yukio Alves Hino Juvenal Silva Neto Leonardo Miranda Vicente Adilson Marques da Cunha Luiz Alberto Vieira Dias Computer and Electronic Engineering Graduate Program Brazilian Aeronautics Institute of Technology Sao Paulo Brazil

This poster describes an academic development of an embedded system project named SETRAIF, which was performed during the 2nd half of 2012, by students and professors of computer engineering courses at the Brazilian Aeronautics Institute of Technology (Instituto Tecnologico de Aeronautica - ITA), combining the use of inter disciplinarity, Agile Methods, and Model Driven Development.

关键词： Embedded systems Hardware computers Prototypes Computational modeling Real-time systems

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Evolving fuzzy classifier based on clustering algorithm and drift detection for fault diagnosis applications

Evolving fuzzy classifier based on clustering algorithm and ...

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2014 Annual Conference of the Prognostics and Health Management Society, PHM 2014

作者： Inacio, Maurilio Lemos, Andre Caminhas, Walmir Graduate Program in Electrical Engineering Federal University of Minas Gerais Belo Horizonte31270-901 Brazil Dept. of Computer Engineering Faculdade de Ciencia e Tecnologia de Montes Claros Montes Claros39400-142 Brazil Dept. of Electronic Engineering Federal University of Minas Gerais Belo Horizonte31270-901 Brazil

ISBN: (纸本)9781936263172

Nowadays, in several areas, efficient fault diagnosis methods for complex machinery and equipments are required. Several fault diagnosis methods based on different theories and approaches have been proposed in the literature. In general, these methods use mathematical/statistical models, accumulated experience, or even process historical data to perform fault diagnosis. Although methods based on models or experience have shown to be effective, they have the disadvantage of requiring previous knowledge of the dynamic system in question. On the contrary, methods based on process historical data do not require a prior knowledge, they are based solely on data obtained directly from the dynamic system. The application of so-called "Evolving Intelligent Systems" to accomplish fault diagnosis from process data have been shown a promising approach. This paper proposes an evolving fuzzy classifier based on a new approach that combines a recursive clustering algorithm and a drift detection method and its application on dynamic systems fault diagnosis. The novel approach provides greater robustness to outliers and noise present in data from process sensors. The classifier is evaluated in fault diagnosis of an interacting tank system and the results are promising.

关键词： Failure analysis

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Photonic sensors as imaging tools for industrial monitoring

Photonic sensors as imaging tools for industrial monitoring

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Optical Sensors, 2014

作者： Martelli, Cicero Da Silva, Marco J. Da Silva, Jean C.C. Morales, Rigoberto E.M. Da Silva, Erlon V. Zamarreño, Carlos R. Baroncini, Virginia Mezzadri, Felipe Patyk, Rodolfo Dutra, Guilherme Bazzo, João Vendruscolo, Tiago P. Graduate Program in Electrical and Computer Engineering Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Department of Mechanical Engineering Federal University of Technology - Paraná Curitiba PR80230-901 Brazil Tractebel Energia S/A Quedas do Iguaçu PR Brazil Electrical and Electronic Engineering Department Public University of Navarra Pamplona NA Spain

Single point, quasi-distributed and distributed optical (fiber) sensors are demonstrated to be robust and reliable tools for one, two and three dimensional imaging of physical phenomena in industrial monitoring. Real ... 详细信息

ISBN: (纸本)9781557528209

关键词： Fiber Bragg gratings Image sensors Sensors Spatial resolution Temperature sensors Three dimensional imaging Fiber Bragg gratings (060.3735) Optical sensing and sensors (280.4788) Flow diagnostics (280.2490)

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PAPR reduction in an OFDM system using recursive clipping and filtering technique

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WSEAS Transactions on Communications 2014年第1期13卷 291-297页

作者： Islam, Anamul Ahmed, N. Ahamed, Nizam Uddin Rahman, Matiur Aljunid, S.A. Dept. of Applied Physics and Electronic Engineering University of Rajshahi Bangladesh School of Computer and Communication Engineering University Malaysia Perlis Malaysia Biomedical Engineering Program Mechatronic Engineering University Malaysia Perlis Malaysia College of Computer Science and Information System Najran University Saudi Arabia

An Orthogonal Frequency Division Multiplexing (OFDM) scheme is expected as an efficient technique for next generation wireless communications. However, high Peak to Average Power Ration (PAPR) of OFDM system is the main drawback which degrades the transmitter power efficiency causes poor performance of the system. To reduce PAPR of OFDM signal, several works on clipping technique have been proposed. This paper is incorporated the improvement of the PAPR and Bit Error Rate (BER) performance using clipping method. It has been shown from the result that by employing the recursive clipping and filtering, 11.45 dB of PAPR of original OFDM signal is reduced down to 4.77 dB. Hence, BER is also increased significantly. This research is carried out through MATLAB simulation and gradually measured the effect of PAPR on BER under AWGN channel for 16QAM scheme with 256 points OFDM. Moreover, it is studied the effect of OFDM signal while passing through High Power Amplifier (HPA). Finally, the PAPR reduction technique such as recursive clipping and filtering (RCF) is implemented.

关键词： Orthogonal frequency division multiplexing

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Optimal signal processing method in UWB radar for hidden human detection

Optimal signal processing method in UWB radar for hidden hum...

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作者： Karamzadeh, Saeid Kartal, Mesut Kent, Sedef Ashtiyani, A. Abed Informatics Institute Department of Advanced Technology Satellite Communication and Remote Sensing Program Istanbul Technical University Turkey Department of Electronics and Communications Faculty of Electrical and Electronic Engineering Istanbul Technical University Turkey Faculty of Electric and Computer University of Tabriz Iran

Today, human detection and tracking is important challenge for many aims. In this study, we are used Ultra Wide Band (UWB) radar for human respiratory detection behind a wall. The modulated system to get the breathing signal is introduced. The results of simulation part of the established system are presented. Suitable antenna for using as a transmitter and receiver is being discussed. Different signal processing methods are debated and optimal method is introduced for various environments. © VDE VERLAG GMBH · Berlin · Offenbach, Germany.

关键词： Antennas

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Batteryless Electrostatic Energy Harvester and Control System

Batteryless Electrostatic Energy Harvester and Control Syste...

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IEEE International Symposium on Circuits and Systems

作者： Antonio Carlos M. de Queiroz Mayli Silva de Souza COPPE/EP - Electrical Engineering Program Federal University of Rio de Janeiro Rio de Janeiro Brazil Department of Electronic and Computer Engineering Federal University of Rio de Janeiro Rio de Janeiro Brazil

ISBN: (纸本)9781479934331

This work shows how an electrostatic energy harvester based on a "doubler of electricity" can be used as energy source for low-power applications, without the need of a battery, and describes a suitable control system for it. The fact that the generator can be made to start from very small initial charge, which can be provided by electrical noise or external interference, is used to eliminate the need of a battery.

关键词： energy harvesting electrostatic generator low-power circuits

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High input impedance mixed-mode biquad filter with orthogonal tune of natural frequency and quality factor

High input impedance mixed-mode biquad filter with orthogona...

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Joint International Conference on Information and Communication Technology, electronic and Electrical engineering (JICTEE)

作者： Kanokrat Chumwangwapee Winai Jaikla Wisuit Sunthonkanokpong Wipobh Jaikhang Suwat Maneewan Bancha Sreewirote Electrical Communications Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand Program in electronic & Computer Engineering Chiangrai Rajabhat University Chiangrai Thailand Department of Technology Electronics Buriram Rajabhat University Buriram Thailand Department of Electrical Engineering Thonburi University Bangkok Thailand

This paper deals with a single-input multiple-output mixed-mode second-order filter providing two voltage-mode functions (low-pass and band-pass) and three transconductance-mode functions (low-pass, band-pass and band-reject) based on voltage differencing transconductance amplifier (VDTA). The quality factor and pole frequency can be electronically and orthogonally tuned via the bias current. The proposed circuit uses two VDTAs and two grounded capacitors without any external resistors, which is suitable to further develop into an integrated circuit. Moreover, the circuit possesses high input impedance, providing easy cascading. The PSPICE simulation results are included, verifying the key characteristics of the proposed filter. The given results agree well with the theoretical presumptions.

关键词： Band-pass filters Impedance Transconductance Q-factor Capacitors electronic mail

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