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Simulation of surgical procedures with Jchai3D

Simulation of surgical procedures with Jchai3D

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2012 Pan American Health Care Exchanges, PAHCE 2012 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Aare and Technology Support

作者： Cerqueira, J.P. Machado, J.G. Ramos, M. Melo, J.S.S. Brasil, L.M. University of Brasilia at Gama Engineering Course Gama Brazil University of Brasilia Electrical Engineering Post-Graduation Program Brasilia Brazil University of Brasilia at Gama Post-Graduation Program of Biomedical Engineering Gama Brazil

ISBN: (纸本)9781467311328

This paper presents the concept of a new platform used to simulate surgical procedures in health field. Jchai3D is a tool which allows easy developing of virtual reality applications. Using this framework is possible to build simulations systems which can be used as educational/training tools. Jchai3D is totally open-source and it is available online for download. In addition, Jchai3D is multiplatform, and it can be executed in several environments like Windows, Linux or Mac OS. © 2012 IEEE.

关键词： Virtual reality

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A Multicriteria Approach for Meter Placement in Distribution Systems

A Multicriteria Approach for Meter Placement in Distribution...

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International Conference on the European Energy Market

作者： Rafael G. Milbradt Luciane N. Canha Pedro B. Zorrilla Alzenira R. Abaide Paulo R. Pereira Sandro M. Schmaedecke Post-Graduation Program in Electrical Engineering Federal University of Santa Maria - UFSM State Company of Electric Power Distribution of Rio Grande do Sul - CEEE-D

ISBN: (纸本)9781479925582

One of the principles of Smart Grids is to have a communication network that will integrate equipment allowing the monitoring and operation to be performed in real time in order to improve the quality indicators. However, this migration to an automated and monitored environment will demand many resources that will be used to perform the migration gradually. Therefore, this work proposes a methodology for allocation of meters with the function of improving the accuracy of state estimation algorithms, but also considering other selection criteria, given the fact that many of automation equipment such as reclosers, automated switches, voltage controllers also perform the function of meters. The paper demonstrates the implementation of a state estimator based on the WLS method, which serves as the basis for the analysis of quantitative criteria such as the accuracy of the estimator, losses, voltage levels and reliability. Thus, the criteria are analyzed considering the needs defined by experts through the Analytic Hierarchy Process, so alternatives of locations and equipment can be prioritized. Finally, the methodology is demonstrated by experimental evaluation on a real feeder.

关键词： Distribution System Smart Grid State Estimation Meter Placement Multicriterial Analysis

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An online coherence-based BCI for driving a mechanical arm

An online coherence-based BCI for driving a mechanical arm

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2012 ISSNIP Biosignals and Biorobotics Conference: Biosignals and Robotics for Better and Safer Living, BRC 2012

作者： Abdalla, Marcos Antônio Barroso, Marcio Falcão Santos Felix, Leonardo Bonato Post-Graduation Engineering Program Federal University of São João Del-Rei São João del-Rei - MG Brazil Department of Electrical Engineering Federal University of Viçosa Viçosa-MG Brazil

ISBN: (纸本)9781467324762

The present work describes the simulation to be used in the control of a mechanical arm using a Visual Evoked Potential to drive a Brain Computer Interface system. The signal processing and classifying was done using the Multiple Coherence K2N. The proposed classifier was able to detect the difference between four different frequencies presented at the same time. The Multiple Coherence classifier had a hit rate of 95%. © 2012 IEEE.

关键词： Brain computer interface

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Active power filters compensator implementation using parallel structures in FPGA devices

Active power filters compensator implementation using parall...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Alexsandro B. Lopes Fábio Favarim Emerson G. Carati Electrical Engineering Post-Graduation Program Federal University of Technology-Paraná Pato Branco Parana Brazil

ISBN: (纸本)9781467324120

This paper presents a parallel implementation approach of selective harmonic compensator for active power filters. This approach uses field programmable gate array (FPGAs) in order to reduce the compensator computational time. To compensate for even a small number of harmonics digital filters require multiple calculation instructions involving multiplications and additions. Thus, to improve the performance of the computer system it is proposed the digital compensator implementation using parallel structures in FPGA devices. Experimental results are presented to compare the speedup of the proposed parallel approach with the DSP sequential execution time conventionally used in active power filters applications.

关键词： Harmonic analysis Power harmonic filters Field programmable gate arrays Active filters Digital signal processing Performance evaluation

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FPGA based implementation of a Fuzzy Neural Network modular architecture for embedded systems

FPGA based implementation of a Fuzzy Neural Network modular ...

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International Joint Conference on Neural Networks (IJCNN)

作者： R. N. A. Prado J. D. Melo J. A. N. Oliveira A. D. Dória Neto Post Graduation Program on Electrical and Computational Engineering Federal University of Rio Grande do Norte Natal Brazil

This paper presents a FPGA based approach for a modular architecture of Fuzzy Neural Networks (FNN) to embed with easily different topologies set up. The project is based on a Takagi - Hayashi (T-H) method for the construction and tuning of fuzzy rules, this is commonly referred as neural network driven fuzzy reasoning. The proposed architecture approach consists of two main configurable modules: a Multilayer Perceptron - MLP with sigmoidal activation function that composes the first module to determine a Fuzzy membership function; the second employs an MLP with pure linear activation function to define the consequents. The DSPBuilder ® software along the Simulink ® is used to connect, set and synthesize the Fuzzy Neural Network desired. Other hardware components employed in the architecture proposed cooperate to the system modularity. The system was tested and validated through a control problem and an interpolation problem. Several papers proposed different hardware architecture to implement hybrid systems by using Fuzzy logic and Neural Network. However, there is no approach with this specific neural network driven fuzzy reasoning by T-H method and the aim to be embedded. The Self-Organizing Map (SOM) and Levenberg-Marquardt backpropagation were used to train the FNN proposed off-line.

关键词： Fuzzy neural networks Neurons Fuzzy control Computer architecture Field programmable gate arrays Hardware Neural networks

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Active power filter operation of an electric vehicle applied to single-phase networks

Active power filter operation of an electric vehicle applied...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Márcio C. B. P. Rodrigues Henrique J. Schettino André A. Ferreira Pedro G. Barbosa Henrique A. C. Braga Power Electronics and Automation Group Electrical Engineering Post-Graduation Program Federal University of Juiz de Fora Juiz de Fora Brazil

ISBN: (纸本)9781467324120

This work proposes the application of a battery or plug-in electric vehicle powertrain on the mitigation of possible residential electricity network power quality problems by means of the integration of a shunt active power filter into its power electronics circuitry. The integration of additional functions to an electric vehicle is a very desirable feature, since it can result on cost reduction (in comparison to the separately implementation of the integrated functions). Simulation results provide evidence of the possible employment of power electronics converters, inherent to the vehicle propulsion system, in order to reduce harmonic content and improve power factor in single-phased electric networks.

关键词： Active filters Power harmonic filters Harmonic analysis Voltage control Electricity Vehicles

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Predictive Control via Multi-Parametric programming Applied to the Dynamic Model of a Robotic Wheelchair

Predictive Control via Multi-Parametric Programming Applied ...

引用

IEEE Latin American Robotics Symposium, LARS

作者： Gustavo P. C. Weinkeller José L. F. Salles Teodiano F.B. Filho Department of Automatic Control Engineering Faculdade do Centro Leste UCL Vitoria Brazil Post-Graduation Program in Electrical Engineering Federal University of Espirito Santo Vitoria Brazil

This paper proposes the use of an explicit dynamic predictive control which is a PWA (PieceWise Affine) function of the dynamic model states of a robotic wheelchair. The optimization algorithmic is based on Multi-parametrical programming, allowing all calculations of this controller be performed off-line, before starting the system operation, resulting in a reduction of online computational time. Some simulation and experimental results illustrate the effectiveness of the proposed method.

关键词： Mobile robots Wheelchairs Mathematical model Predictive control programming Predictive models

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DC electronic load based on an interleaved chopper converter to determine photovoltaic panel and fuel cell biasing curves

DC electronic load based on an interleaved chopper converter...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Jordan G. Trapp João M. Lenz Felix A. Farret Leandro B. Kehler Juliano B. Shoenhalz Center of Studies in Energy and Environment (CEEMA) Post-Graduation Program in Electrical Engineering (PPGEE) Technology Center Federal University of Santa Maria Santa Maria Brazil

This paper presents the description of a DC electronic load based on an interleaved chopper converter to determine the biasing and dynamics characteristics of either fuel cells (FCs) and photovoltaic panels (PVs). Variable loads are used for experimental data acquisition of I-V power supply characteristics in a way that several operating points can be easily obtained. Laboratory load current tests using ordinary power resistors are not an easy solution due to their size, cost and overall weight. To resolve that it is proposed in this paper that the current through electronically varying loads can give better resolution to the I-V characteristics of FC and PV sources. The interleaved operation of the chopper converter ensures an input high frequency current ripple, reducing so the input LC filters size and converter volume. The converter transfer function is analyzed and controllers are designed to obtain a fast dynamic response and insure good stability in steady state operation. It is presented the converter operating principles, operating states and design. The simulated and results are compared to each other in order to prove the electronic load effectiveness in acquiring the I-V biasing curves of fuel cells and photovoltaic panels.

关键词： Fuel cells Resistors Choppers (circuits) Photovoltaic systems Transfer functions Mathematical model

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Applying MVC to Evolutionary Acquisition IRPM

Applying MVC to Evolutionary Acquisition IRPM

引用

2012 International Conference on Smart Grid Systems(ICSGS 2012)

作者： Patrick Letouze Mariwaldo G. Caetano Joāo Y. Ishihara David Prata George Brito UFT-Federal University of Tocantins Brazil:Department of Computer Science UnB-University of Brasilia Brazil:Department of Electrical EngineeringPGEA-Program of Post-Graduation in Electronic and Automation Systems Engineering

This work presents a combination of the Model-View-Controller pattern with the Evolutionary Acquisition Interdisciplinary Research Project Management for web services *** intends to promote an increase in productivity and to facilitate interdisciplinary web services *** consists of an independent database for users' feedback that together with technological opportunities and evolving threats considerations may start a new release of the system allowing a dynamic evolution through acquiring new features or correcting errors,but the new release decision is not *** other words,web service evolution is accomplished adding requirements analysis into the Model-View-Controller pattern,which is incorporated into Interdisciplinary Research Project Management.

关键词： Evolutionary acquisition,IRPM,MVC,project management,software engineering,web services.

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An online coherence-based BCI for driving a mechanical arm

An online coherence-based BCI for driving a mechanical arm

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Biosignals and Biorobotics Conference (BRC), ISSNIP

作者： Marcos Antônio Abdalla Marcio Falcão Santos Barroso Leonardo Bonato Felix Post-Graduation Engineering Program Federal University of São João del Rei Sao Joao del Rei Minas Gerais Brazil Department of Electrical Engineering Federal University of Viçosa Vicosa Minas Gerais Brazil

The present work describes the simulation to be used in the control of a mechanical arm using a Visual Evoked Potential to drive a Brain Computer Interface system. The signal processing and classifying was done using the Multiple Coherence K 2 N . The proposed classifier was able to detect the difference between four different frequencies presented at the same time. The Multiple Coherence classifier had a hit rate of 95%.

关键词： Coherence Electroencephalography Signal to noise ratio Brain modeling Equations Mathematical model

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