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SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2015

作者： Ferreira, Hillner De P. A. Serres, Alexandre J. R. Serres, Georgina Karla De F. De Assis, Francisco M. Neto, Alfrêdo Gomes Post-Graduate Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Group of Telecom. and Applied Electromagnetism Federal Inst. of Educ. Science and Technology of Paraíba João Pessoa Brazil

ISBN: (纸本)9781467394925

A compact electromagnetic multi-resonator is presented in this paper using a new technique for chipless RFID tag data encoding. Employing Archimedean spirals, the information is applied into the spectral signature shifting resonant frequencies in several positions. The multi-resonator tag proposed operates in microwave band (between 3.0-7.0GHz) and has a coding data capacity of up to 100 decimal numbers for two resonant frequencies. The simulated and measured results show a good concordance and a great perspective to use in low-cost RFID chipless tag applications. © 2015 IEEE.

关键词： Radio frequency identification (RFID)

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Knee Motion Pattern Classification from Trunk Muscle Based on sEMG Signals

Knee Motion Pattern Classification from Trunk Muscle Based o...

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

作者： A. López-Delis D. Delisle-Rodríguez A. C. Villa-Parra T. Bastos-Filho Biophysics Medical Center University of Oriente Santiago de Cuba Cuba Post-graduate Program of Electrical Engineering Federal University of Espirito Santo Brazil Post-graduate Program of Electrical Engineering Federal University of Espirito Santo Brazil and GIIB Universidad Politécnica Salesiana Cuenca Ecuador

ISBN: (纸本)9781424492695

A prominent change is being carried out in the fields of rehabilitation and assistive exoskeletons in order to actively aid or restore legged locomotion for individuals suffering from muscular impairments, muscle weakness, neurologic injury, or disabilities that affect the lower limbs. This paper presents a characterization of knee motion patterns from Surface Electromyography (sEMG) signals, measured in the Erector spinae (ES) muscle. Feature extraction (mean absolute value, waveform length and auto-regressive model) and pattern classification methods (Linear Discrimination Analysis, K-Nearest Neighborhood and Support Vector Machine) are applied for recognition of eight-movement classes. Additionally, several channels setup are analyzed to obtain a suitable electrodes array. The results were evaluated based on signals measured from lower limb using quantitative metric such as error rate, sensitivity, specificity and predictive positive value. A high accuracy (> 95%) was obtained, which suggest that it is possible to detect the knee motion intention from ES muscle, as well as to reduce the electrode number (from 2 to 3 channels) to obtain an optimal electrodes array. This implementation can be applied for myoelectric control of lower limb active exoskeletons.

关键词： Erector spinae sEMG signals knee motion intention time-frequency features pattern classification Davies-Bouldin criterion

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Analysis of the resonant behavior of FSS using matryoshka geometry

Analysis of the resonant behavior of FSS using matryoshka ge...

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SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, IMOC 2015

作者： Neto, Alfrêdo Gomes E Silva, Jefferson C. De Carvalho, Joabson Nogueira Cruz, Josiel Do Nascimento Ferreira, Hillner De Paiva Almeida Group of Telecom. and Applied Electromagnetism Federal Inst. of Educ. Science and Technology of Paraíba GTEMA IFPB João PessoaPB Brazil Post-Graduate Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9781467394925

In this paper the resonant behavior of frequency selective surfaces, FSS, using matryoshka geometry is analyzed considering polarizations x and y. The basics of the FSS using matryoshka geometry are described for usual and open cases, including an expression to estimate the first resonant frequency. Initially, the FSS with two concentric square rings is considered and its resonant behavior analyzed. Then, the resonant behavior of FSS with two rings matryoshka geometry is examined. The analysis is based on the electric current distribution obtained using the commercial software ANSYS-Designer. With a better understanding of the resonance nature in matryoshka geometry the design parameters can be better adjusted and desired frequency responses properly achieved. © 2015 IEEE.

关键词： Geometry

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Design of active orthoses for a robotic gait rehabilitation system

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Frontiers of Mechanical engineering 2015年第3期10卷 242-254页

作者： A. C. VILLA-PARRA L. BROCHE D. DELISLE-RODRIGUEZ R. SAGARO Y. BASTOS A. FRIZERA-NETO Post-Graduate Program in Electrical Engineering Universidade Federaldo Espirito Santo Vit6ria 29075-910 Brazil Grupo de Investigacion en Ingenieria Biomodica GIIB UniversidadPolitdcnica Salesiana Cuenca 010105 Ecuador Mechanical and Design Engineering Department Universidad deOriente Santiago de Cuba 90500 Cuba Center of Medical Biophysics Universidad de Oriente Santiago deCuba 90500 Cuba

An active orthosis （AO） is a robotic device that assists both human gait and rehabilitation therapy. This work proposes portable AOs, one for the knee joint and another for the ankle joint. Both AOs will be used to complete a robotic system that improves gait rehabilitation. The requirements for actuator selection, the biomechanical considerations during the AO design, the finite element method, and a control approach based on electroencepha-lographic and surface electromyographic signals are reviewed. This work contributes to the design of AOs for users with foot drop and knee flexion impairment. However, the potential of the proposed AOs to be part of a robotic gait rehabilitation system that improves the quality of life of stroke survivors requires further investigation.

关键词： active orthosis gait rehabilitation,electroencephalography surface electromyography

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Using synchronism pulse to improve A2I implementations

Using synchronism pulse to improve A2I implementations

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IEEE Instrumentation and Measurement Technology Conference

作者： Vanderson Lima Reis Edmar C. Gurjão Raimundo C. S. Freire Post-Graduate Program in Electrical Engineering UFCG Universidade Federal de Campina Grande Campina Grande PB BR Electrical Engineering Department - UFCG Campina Grande Paraiba Brazil

ISBN: (纸本)9781479961153

The necessity of the same signal for measurement and reconstruction of sparse signals in Compressed Sensing is one of the challenges in its practical implementation. In this paper, we extend the Random Modulator Pre-Integrator (RMPI), architecture proposed to signal acquisition in Compressed Sensing, by including a synchronization signal that permits to obtain the same measurement signal from a Pseudo Random Binary Sequence (PRBS), both at measurement and reconstruction, with low increase hardware complexity. The proposed extension was validated in hardware, and it is shown the possibility of transparent modification of the measurement signal, maintaining the functionality of to obtain the same signal at measurement and recovery.

关键词： Hardware Synchronization Compressed sensing Pulse measurements Field programmable gate arrays Active filters Generators

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Seven level asymmetric inverters with coupled inductors 13

Seven level asymmetric inverters with coupled inductors

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13th IEEE Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference, COBEP/SPEC 2016

作者： Bueno, Diego A. Acevedo Leal Da Silva, Juliano C. Da Silva, Edison Roberto C. Andrade, Abinadabe Silva Dias, Tulio Albuquerque Post-graduate Program in Electrical Engineering - PPgEE/COPELE Federal University of Campina Grande Campina Grande PB Brazil Federal University of Campina Grade/LEIAM COPELE Campina Grande PB Brazil Federal University of paraíba/GEPAME CPGEE João Pessoa PB Brazil

ISBN: (纸本)9781479987795

This paper proposes two seven level asymmetric inverter with coupled inductors that enable a reduction in the number of controlled switching devices. However, the lack of redundant states and difference in the maximum pole voltages reduce the performance of the inverters due to higher winding currents and saturation of magnetic core. For mitigating those issues, a coupled inductor with elevated magnetizing inductance is used. The operation principle, conducting states and modulation strategy are described. Simulation and experimental results demonstrate the feasibility of proposed topology. © 2015 IEEE.

关键词： Pulse width modulation

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Seven level asymmetric inverters with coupled inductors

Seven level asymmetric inverters with coupled inductors

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Brazilian Power Electronics Conference, COBEP

作者： Diego A. Acevedo Bueno Juliano C. Leal da Silva Edison Roberto C. da Silva Abinadabe Silva Andrade Tulio Albuquerque Dias Post-graduate Program in Electrical Engineering - PPgEE/COPELE Universidade Federal de Campina Grande Campina Grande PB BR Post-graduate Program in Electrical Engineering - PPgEE/COPELE Federal University of Campina Grande Campina Grande PB Brazil COPELE Federal University of Campina Grade/LETAM Campina Grande PB Brazil

关键词： Topology Inductors Switches Windings Inductance Modulation Capacitors

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Proceedings from the IV Brazilian Meeting on Research Integrity, Science and Publication Ethics (IV BRISPE)

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Research Integrity and Peer Review 2017年第1期2卷 1-12页

作者： Sonia Vasconcelos Edson Watanabe L. P. Garcia E. Duarte M. C. Cassimiro M. M. P. Diós-Borges A. M. M. Soares C. H. Debenedito Silva A. A. P. Santa Rosa G. A. Fófano H. S. Pinheiro A. M. Gollner C. C. Santos S. M. R. Vasconcelos D. C. Machado P. V. S. Souza R. T. Souza M. D Ribeiro P. Biancovilli M. Fontes-Domingues V. C. Garbocci R. Neves M. D. Ribeiro R. Amaral M. M. M. Machado P. M. Lourenço V. Ronchi A. C. Furnival L. S. Gracioso M. D. P. Silva F. M. Litto M. Patrão Neves A. S. Carvalho J. Araújo S. Liskauskas R. Kant de Lima S. C. Bourguignon F. R. Mota H. G. Falcão J. C. Amaral A. C. Quintela A. Schtscherbyna A. Palma C. A. Guimarães D. Foguel E. H. Watanabe R. M. V. R. Almeida J. R. Lapa e Silva M. M. Sorenson B. C. Machado A. P. Vicentini A. A. B. Almodóvar R. M. Catarino H. H. Caiaffa Filho E. Damasio J. Leta L. V. R. Rezende S. Cruz-Riascos A. Abreu M. Russo P. G. Camacho M. Palácios N. R. A. Silva M. R. C. G. Novaes D. Guilhem H. S Selistre-de-Araujo A. S. C. Abreu Science Education Program Institute of Medical Biochemistry Leopoldo de Meis (IBqM) Federal University of Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Committee on Research Integrity (CRI) Advisory Council for Research Ethics (CTEP) Federal University of Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Electrical Engineering Program (PEE) Institute Alberto Luiz Coimbra of Graduate Studies and Research in Engineering (COPPE) Federal University of Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Institute for Applied Economic Research (IPEA) Brasília Federal District Brazil Secretary for Health Surveillance Ministry of Health Brasília Federal District Brazil Scientific Integrity Committee Oswaldo Cruz Foundation Oswaldo Cruz Institute (IOC/FIOCRUZ) Rio de Janeiro Brazil Scientific Integrity Committee Oswaldo Cruz Institute Oswaldo Cruz Foundation (IOC/FIOCRUZ) Rio de Janeiro Brazil Bioethics Institute Catholic University of Portugal Porto Portugal Rio de Janeiro State University (UERJ) Rio de Janeiro Brazil National Cancer Institute (INCA) Cancer Hospital IV - Ethics Committee for Clinical Research Rio de Janeiro Brazil Federal General Hospital of Bonsucesso Rio de Janeiro Brazil Human Research Ethics Committee University Hospital of Juiz de Fora (HU-UJFJ) Juiz de Fora Minas Gerais Brazil Faculty of Southeastern Minas Gerais (FACSUM) Juiz de Fora Minas Gerais Brazil São Pedro Educational Institute (IESPe) Juiz de Fora Minas Gerais Brazil University Hospital of Juiz de Fora (HU-UJFJ) Juiz de Fora Minas Gerais Brazil Department of Biology and Sciences Pedro II School Rio de Janeiro Brazil Science Education Program Institute of Medical Biochemistry Leopoldo de Meis Federal University of Rio de Janeiro (IBqM/UFRJ) Rio de Janeiro Brazil Professional Masters Program in Science Education Institute of Medical Biochemistry Leopoldo de Meis (IBqM) Federal University of Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Research Ethics Committee Clementino Fraga Filho University Hos

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Universal active power filters based on nine-leg converter

Universal active power filters based on nine-leg converter

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IEEE Energy Conversion Congress and Exposition

作者： P. L. S. Rodrigues C. B. Jacobina G. A. d. A. Carlos Post-Graduate Program in Electrical Engineering - PPgEE - Copele Department of Electrical Engineering Federal University of Campina Grande (UFCG) Paraiba Brazil Universidade Federal de Campina Grande Campina Grande PB BR

This paper proposed two universal active power filter (UAPF) topologies for reactive power and harmonic compensation. The proposed system is a combination of series and shunt active power filters. They are suitable to improve the harmonic distortion in the grid currents and a voltage compensation. The filters are composed of three three-phase converters resulting in nine legs. The first (configuration I) can operate with floating dc-link capacitor or an auxiliary DC source on the series filter and the second one (configuration II) uses a combination of two series filters and one shunt filter sharing a single dc-link. The complete control system, including the PWM techniques, is developed and a comparison between the configurations is done. Simulation and experimental results are shown for validation purposes.

关键词： Pulse width modulation Voltage control Capacitors Harmonic analysis Power harmonic filters Control systems

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Archimedean Spiral Multi-resonator for Chipless RFID Tag Using Frequency-Coded Decimal Method

Archimedean Spiral Multi-resonator for Chipless RFID Tag Usi...

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SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference

作者： Hillner de P. A. Ferreira Alexandre J. R. Serres Georgina Karla de F. Serres Francisco M. de Assis Alfredo Gomes Neto Post-Graduate Program in Electrical Engineering Federal University of Campina Grande Group of Telecom. and Applied Electromagnetism Federal Inst. of Educ. Science and Technology of Paraiba

ISBN: (纸本)9781467394932

关键词： RFID chipless Frequency-Coded Decimal Archimedean spiral Multi-resonator

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