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Annual Conference of Industrial Electronics Society

作者： Victor F. M. B. Melo Cursino B. Jacobina Nady Rocha Nustenil S. Marinus Post-Graduate Program in Electrical Engineering UFCG Electrical Engineering Department Federal University of Campina Grande - UFCG Campina Grande Paraíba Brazil Federal University of Paraíba - UFPB João Pessoa Paraíba Brazil Federal Institute of Technology of Ceara - IFCE

This paper presents two six-phase open-end machine conversion systems. They are composed of three three-leg converters connected in series to a six-phase machine with open terminals, in an open-end winding connection. The converters use diodes to replace controlled switches, making the conversion system non-reversible and with a reduced number of controlled components. In this case, the machine must work always as a generator. A study concerning harmonic distortion and semiconductor losses is carried out. PWM and control strategies are developed. Simulation and experimental results in order to test these strategies are presented.

关键词： Topology Voltage control Harmonic distortion Control systems Generators Pulse width modulation Windings

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All-solid Sn/Pb halide perovskite sensitized solar cells

All-solid Sn/Pb halide perovskite sensitized solar cells

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2014 IEEE 40th Photovoltaic Specialist Conference (PVSC)

作者： Yuhei Ogomi Atsushi Morita Shota Tsukamoto Takahiro Saitho Naotaka Fujikawa Shen Qing Taro Toyoda Kenji Yoshino Shyam S. Pandey Tingli Ma Shuzi Hayase Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology Kitakyushu Fukuoka Japan Denki Tsushin Daigaku Chofu Tokyo JP CREST Japan Science and Technology Agency (JST) Kawaguchi Saitama Japan Graduate School of Informatics and Engineering University of Electro-Communications Chofu Tokyo Japan Department of Electrical and Electronic Engineering University of Miyazaki Miyazaki Japan

We have succeeded in harvesting energy in near infrared region (NIR) by using air stable Sn doped metal halide perovskite materials. The edge of the incident photon to current efficiency (IPCE) edge reached 1060 nm. 4.18 % efficiency is reported. The photovoltaic performance was compared with Pb halide perovskite solar cell with 14.4% efficiency, leading to the conclusion that the low FF and Voc are associated with low shunt resistance (Rsh). One of the methods to suppress the charge recombination will be reported, which includes passivation of porous titania surface states with aminoacid HI salts. The relationship among the surface states of titaniaor alumina, and crystallinity of the perovskites induced by surface passivation molecules, and photovoltaic performances are discussed.

关键词： Photovoltaic cells Tin Lead Passivation Absorption Photovoltaic systems

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Investigation on Dynamic Voltage Restorers With Two DC-Links and Series Converters for Three-Phase Four-Wire Systems

Investigation on Dynamic Voltage Restorers With Two DC-Links...

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IEEE Energy Conversion Congress and Exposition

作者： Gregory A. A. Carlos Cursino B. Jacobina Euzeli C. dos Santos Department of Control and Industrial Process Federal Institute of Alagoas (IFAL) Palmeira dos Indios - 57601-220 - Alagoas - Brazil Post-Graduate Program in Electrical Engineering - PPgEE - Copele Department of Electrical Engineering Federal University of Campina Grande (UFCG) Campina Grande - 58429-900 - Paraiba - Brazil Department of Electrical and Computer Engineering Purdue School of Engineering and Technology (IUPI) Indianapolis - 46202-5160 - Indiana - USA

ISBN: (纸本)9781479957774

This paper proposes three dynamic voltage restorer (DVR) topologies. Such configurations are able to compensate voltage sags/swells in three-phase four-wire (3P4W) systems under balanced and unbalanced conditions. The proposed systems in this work use two independent dc-links. The complete control system, including the PWM technique, is developed and comparisons between the proposed configurations and a conventional one are performed. Simulation and experimental results are provided to validate the theoretical approach.

关键词： Vectors Topology Pulse width modulation Switches Inverters Capacitors Insulated gate bipolar transistors

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Service-oriented biomedical devices

Service-oriented biomedical devices

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Health Innovations and POCT

作者： João M. T. Lacerda Ricardo A. M. Valentim Bruno G. de Araújo Philippi S. G. Morais Marcel C. M. Dantas Federal Institute of Education Graduate Program in Electrical Engineering and Computer Science (PPGEEC) Natal RN Brazil Laboratory of Technological Innovation in Health (LAIS) Federal University of Rio Grande do Norte (UFRN) Natal RN Brazil

The great diversity in the architecture of biomedical devices, coupled with their different communication protocols, has hindered the implementation of systems that need access to these devices. Given these differences, arises the need to provide access to such devices in a transparent way. In this sense, this paper proposes an service-oriented architecture to access biomedical devices as a way to abstract the mechanism for writing and reading data on these devices, thus contributing to the increase in quality and productivity of biomedical systems in order to enable that the focus of the development team of biomedical software is almost exclusively intended for its functional requirements, i.e. business rules relevant to the problem domain. For the development of this work, technologies such as the XML language and the Java programming language were used and concepts of Software engineering as Design Patterns. After the proposition of the architecture, tests in order to validate the proposed architecture were performed.

关键词： Service-oriented architecture Hardware XML Java Time factors Computer architecture

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Modulation diversity effects in rayleigh fading multipath channels

Modulation diversity effects in rayleigh fading multipath ch...

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International Symposium on Telecommunications

作者： Raphael Tavares de Alencar Matheus de Araújo Cavalcante Waslon Terllizzie Araújo Lopes Wamberto José Lira de Queiroz Marcelo Sampaio de Alencar Federal University of Campina Grande (UFCG) Brazil Post-Graduate Program in Electrical Engineering-PPgEE-COPELE Institute for Advanced Studies in Communications (IECOM) Brazil Universidade Federal de Campina Grande Campina Grande PB BR

The wireless channel has characteristics of multipath fading, due to reflection, refraction and scattering. Modulation diversity is a bandwidth-efficient diversity technique that uses rotation, associated with the interleaving between the in-phase and quadrature components of a digital signal constellation. It is intended to mitigate the effects of fading in wireless communications. The research considered a scenario in which multiple paths are simulated, with associated random multiplicative noise and delay. The multipath fading effect is studied in this scenario, and a comparison between the BER values for 4-PSK and 8-PSK transmission is presented, to evaluate the gain provided by the modulation diversity scheme. An analysis concerning optimum rotation angles is performed, considering eight multipath scenarios, including cases with severe fading effect.

关键词： Fading Bit error rate Signal to noise ratio Phase shift keying Gain Wireless communication

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SAPF with two Dc-links and series converters feeding OEW transformers for 3P4W systems

SAPF with two Dc-links and series converters feeding OEW tra...

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Annual Conference of Industrial Electronics Society

作者： Gregory A. de A. Carlos Cursino B. Jacobina Euzeli C. dos Santos Department of Control and Industrial Process Federal Institute of Alagoas (IFAL) Palmeira dos Índios - 57601-220 - Alagoas - Brazil Post-Graduate Program in Electrical Engineering - PPgEE - Copele Federal University of Campina Grande (UFCG) Campina Grande Paraíba Brazil Department of Electrical and Computer Engineering Purdue School of Engineering and Technology (IUPUI) Indiana USA

This paper presents a shunt active power filter (SAPF) topology, based on the concept of a transformer with open-end winding (OEW), for reactive power and harmonic compensations employed in three-phase four wire (3P4W) systems under balanced and unbalanced conditions. The proposed system uses two independent dc-links and two independent converters series connected through transformers. Complete system control, including PWM technique, is developed and a comparison between the proposed SAPF and conventional one is presented as well. Simulation and experimental results are provided to validate the theoretical approach.

关键词： Topology Pulse width modulation Capacitors Voltage control Optimization Harmonic analysis Power system harmonics

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Automated Cell Counting in a High Density, Polymer-Coated, Live Single Cell Sandwich Microarray

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Microscopy and Microanalysis 2014年第S3期20卷 1438-1439页

作者： Jordan R. Yaron Jieying Pan Tejas Borkar Kristen B. Lee Kuo-Chen Wang Clifford L. Anderson Honor L. Glenn Deirdre R. Meldrum Center for Biosignatures Discovery Automation The Biodesign Institute Arizona State UniversityTempe AZ USA Biological Design Graduate Program Arizona State University Tempe AZ USA School of Electrical Computer and Energy Engineering Arizona State University Tempe AZ USA

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AC-DC-AC Three-Phase Converter Based on Three Three-Leg Converters Connected in Series

AC-DC-AC Three-Phase Converter Based on Three Three-Leg Conv...

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IEEE Energy Conversion Congress and Exposition

作者： Nustenil S. M. L. Marinus Cursino B. Jacobina Nady Rocha Euzeli C. dos Santos Federal Institute of the Ceara Campus Cedro Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) 58109-970 Campina Grande - PB - Brazil Electrical Engineering Department (DEE) Federal University of Paraiba (UFPB) 58051-900 Cidade Universitaria - Joao Pessoa - PB - Brazil Indiana University-Purdue University Indianapolis

ISBN: (纸本)9781479957774

An unidirectional three-phase to three-phase dc-link converter is proposed, in this paper. It is composed of three unidirectional ac-dc-ac three-leg converters with a shared-leg. The three-leg converter is composed of a non-controlled leg, two controlled legs and a dc-link. A suitable model and control strategy of the systems, including a synchronization method, are proposed. The synchronization method, associated with the PWM strategy allow the grid currents and load voltages have the same phase angle of the input converter voltages. This method ensures sinusoidal grid currents and mitigate the zero-crossing distortions normally caused by the use of diodes. Simulation and experimental results are also presented for validation purposes.

关键词： Topology Capacitors Voltage control Synchronization Legged locomotion Harmonic analysis Load modeling

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Comparison of LED and RSOA performance in WDM-PONs

Comparison of LED and RSOA performance in WDM-PONs

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International Conference on Telecommunications (ICT)

作者： Luiz Fernando Henning Paulo Monteiro Alexandre de Almeida Prado Pohl Federal Institute of Santa Catarina IFSC — Jaraguá do Sul Brazil Instituto de Telecomunicações Universidade de Aveiro Portugal Graduate Program on Electrical Engineering — CPGEI Federal University of Technology — Paraná (UTFPR) Curitiba Brazil

Currently there is an significant effort by system operators to deploy cost effective Passive Optical Networks (PON). In this way, next generation PON is the subject of studies by researchers and system designers. Among them, Wavelength Division Multiplexing in Passive Optical Networks (WDM-PON) are of particular interest once they can provide larger capacity. This work presents a performance and cost comparison of two colourless optical network units (ONU) configurations that employ a Light Emitting Diode (LED) source and a reflective semiconductor optical amplifier (RSOA).

关键词： Optical network units Light emitting diodes Passive optical networks Wavelength division multiplexing Optical fibers

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Coordinated path-following for multi-robot systems using the cluster space framework approach

Coordinated path-following for multi-robot systems using the...

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IEEE International Conference on Industrial informatics (INDIN)

作者： Cassius Zanetti Resende Ricardo Carelli Mário Sarcinelli-Filho Department of Industrial Automation Federal Institute of Espírito Santo Serra ES Brazil Institute of Automatics National University of San Juan San Juan Argentine Graduate Program on Electrical Engineering Federal University of Espírito Santo Vitória ES Brazil

This paper proposes a solution to the problem of path-following by a formation of mobile robots (three robots are considered, forming a triangle on the ground). The proposed solution allows planning the motion of the desired formation without needing specifying how each robot should move. The proposed strategy is based on the cluster space approach, and embeds a reactive method to give the formation the capability of avoiding obstacles during the path-following. Theoretical analysis and experimental results are presented, which demonstrate the effectiveness of the proposed control system to guide the multi-robot formation to accomplish a path-following task.

关键词： Robot kinematics Shape Hafnium Trajectory Mobile robots Kinematics

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