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检索条件"机构=Post-Graduate Program in Electrical Engineering-PPgEE"

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Bio-inspired antenna for UWB systems

Bio-inspired antenna for UWB systems

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International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)

作者： Paulo Fernandes da Silva Raimundo Carlos Silvério Freire Alexandre Jean René Serres Paulo Henrique Da Fonseca Silva Jefferson Costa e Silva Post-Graduate Program in Electrical Engineering - COPELE Federal University of Campina Grande UFCG Brazil Post-Graduate Program in Electrical Engineering - COPELE Federal University of Campina Grande UFCG Campina Grande Brazil Universidade Federal de Campina Grande Campina Grande PB BR Post-Graduate in Electrical Engineering PPGEE Federal Institute of Paraiba IFPB Brazil Post-Graduate in Electrical Engineering PPGEE Federal Institute of Paraiba IFPB Joao Pessoa Brazil

In this paper is presented a new printed monopole antenna, bio-inspired by jasmine flower, that meets the Federal Communications Commission parameters for ultra-wideband systems. The design of the printed monopole antenna in jasmine flower has developed from a printed monopole antenna with circular geometry, with comparison results. The measured results of bio-inspired antenna in the jasmine flower showed compatibility with the parameters required by the FCC for ultra-wideband technology. It obtained bandwidth of 9.75 GHz, half-power beamwidth of 148 degrees, omnidirectional radiation pattern, gain of 5.99 dBi, power spectral density below -41.3 dBm across the bandwidth of ultra-wideband technology, small pulse distortion, and constant group delay, with variations of less than 2ns.

关键词： FCC Ultra wideband antennas Antenna measurements Bandwidth Geometry Distortion Frequency measurement

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Visual feedback trajectory planning for object handling and obstacle avoidance

Visual feedback trajectory planning for object handling and ...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Fernando J. Mendiburu Marcos R. A. Morais Antonio M. N. Lima Graduate Program in Electrical Electrical Engineering - PPgEE Department of Electrical Engineering Universidade Federal de Campina Grande

ISBN: (纸本)9781479902255

In this article a visual feedback control system implementation is presented. The proposed system integrates a trajectory planning method into the controller of a five-degree-of-freedom manipulator aiming to simplify object handling and obstacle avoidance. The system aims the intelligent handling of several parts, generating obstacle free paths whenever possible. The workspace information is provided by a redundant vision system: a RGB camera placed over the handler actuator and a fixed RGB-D camera.

关键词： Obstacle avoidance trajectory planning Collision avoidance Visual Feedback Handling (Psychology) Cameras Controllers

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Swim velocity profile identification by using a modified differential evolution method associated with RBF Neural Network

Swim velocity profile identification by using a modified dif...

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2013 3rd International Conference on Innovative Computing Technology, INTECH 2013

作者： Santos Coelho, Leandro Dos Da Cruz, Luciano Ferreira Freire, Roberto Zanetti Pontifical Catholic University of Parana - PUCPR Industrial and Systems Engineering Graduate Program - PPGEPS Curitiba PR Brazil Federal University of Parana - UFPR Department of Electrical Engineering - DEE/PPGEE Curitiba PR Brazil

ISBN: (纸本)9781479900473

High level sports require a steady intensification of training in order to raise the athletes' performance. With the purpose of support swimmers and coaches new biomechanical analysis are been performed, becoming one of the most studied areas in swimming. By using technology resources, Esignificant results related to performance improvements are being achieved. Specific analysis of the movements, strength, velocity and projection allow identifying relevant points that directly impact athletes' results. In this context, this work uses a Radial Basis Function Neural Network (RBF-NN) with training combining the Gustafson-Kessel clustering method and the proposed Modified Differential Evolution (MDE) in order to perform the swimmer velocity profile identification. The main idea is to obtain the dynamic of the velocity profile and to use it to improve the athletes' swim style. Differential Evolution (DE) is an evolutionary algorithm that uses a rather greedy and less stochastic approach to solve problems when compared to other evolutionary methods [1]. However, to achieve good performance with DE, the tuning of control parameters is essential as its performance is sensitive to the choice of the mutation and crossover settings. On the other hand, the RBF-NN is a powerful approach for nonlinear identification. This paper combines the two strategies described above proposing a modified DE algorithm based on the association of a sinusoidal signal and chaotic sequences generated by logistic map for the mutation factor tuning. By using data collected from breaststroke and crawl swim style of an elite female swimmer, the validity and the accuracy of the RBF-NN model have been tested by simulations. Results reveal that it is feasible to establish a good model to represent data experimental related to swimming field. Identification results show that MDE outperforms both other tested classical DE approaches for training RBF-NNs in terms of solution quality. © 2013 IEEE.

关键词： Optimization

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Low-Power Energy Conversion Systems With Two-Phase PM Machine and a Rectifier with Reduced Number of Controlled Switches

Low-Power Energy Conversion Systems With Two-Phase PM Machin...

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IEEE Energy Conversion Congress and Exposition

作者： Cursino B. Jacobina Victor F. M. B. Melo Filipe A. da C. Bahia Italo Roger F. M. P. da Silva Electrical Engineering Department - Federal University of Campina Grande - UFCG Campina Grande Paraiba Brazil Post-Graduate Program in Electrical Engineering - PPgEE - COPELE - UFCG

ISBN: (纸本)9781479957774

This paper presents two energy conversion systems with two-phase permanent magnet (PM) machine and a rectifier with reduced number of controlled switches. The topologies are conceived with the purpose of converting wind energy into electrical energy (i.e., a wind energy conversion system (WECS)) for low power applications. Compared with some three-phase generation systems with reduced number of controlled switches, the proposed topologies permit obtaining sinusoidal controlled machine currents, reducing dc-link voltage and dq currents low harmonic distortion.

关键词： Topology Voltage control Harmonic distortion Legged locomotion Harmonic analysis Control systems Wind energy

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Comparison of new techniques based on EMD for control of a SSVEP-BCI

Comparison of new techniques based on EMD for control of a S...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Richard M. G. Tello Sandra Mara Torres Müller Teodiano Bastos-Filho Andre Ferreira Post-Graduate Program of Electrical Engineering (PPGEE). UFES Vitoria Brazil Department of Computer and Electronics (CEUNES) Sao Mateus Brazil

ISBN: (纸本)9781479924004

This paper presents the comparation of three different feature extraction techniques based on the Empirical Mode Decomposition (EMD) for a SSVEP-BCI. This approach based on the characterization of the signal by EMD, is proposed as a novel alternative to other techniques and it was demonstrated that it exceeds both in accuracy rate and Information Transfer Rate (ITR). The experiments were performed in an offline way, and seven volunteers participated of the study. The stimulis were generated both by LCD and LEDs. The frequencies used were 8, 11, 13 and 15 Hz. The results here reported such represent the average of the seven participants, achieving a success rate of 81% and ITR of 23.32 bits/min of the total set of cases analyzed. It is further confirmed that the highest success rates and ITRs were obtained for stimulation by LEDs.

关键词： Electrodes

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Three-Phase Integrated PFC AC-AC Resonant Inverter with Weak Coupled Coils for Induction Heating Application

Three-Phase Integrated PFC AC-AC Resonant Inverter with Weak...

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IEEE Energy Conversion Congress and Exposition

作者： Ruan C. M. Gomes Montie A. Vitorino Diego A. Acevedo-Bueno Mauricio B. R. Correa Post-Graduate Program in Electrical Engineering (PPgEE–COPELE) Federal University of Campina Grande (UFCG) Campina Grande PB Brazil

This paper proposes a 4.3 kW three-phase integrated PFC AC-AC resonant inverter for Induction Heating (IH) Application. This converter is composed by three independent resonant inverters with non-smoothed DC link that achieves high power factor operation. The magnetic coupling of the three coils was modeled by using the impedance matrix for characterizing the resonant behavior of the arrangement. The coils arrangement with weak coupling between coils is applied for induction water heater. Experimental results validate the modes of operation with ZVS and the converter performance in the entire power input range (PF and THD).

关键词： Coils DH-HEMTs Magnetic noise Magnetic resonance Magnetic shielding Couplings Impedance

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Optimal Integration of Metaheuristic Techniques with Correction-Based Approaches for Profit Maximization in Combinatorial Production Planning: A Comparative Analysis 3

Optimal Integration of Metaheuristic Techniques with Correct...

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3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

作者： Mukherjee, Arijit Mukherjee, Surojit Future Institute of Technology Deptartment of Electrical Engineering Kolkata India Great Lakes Institute of Management Post-Graduate Program in Management Chennai India

ISBN: (纸本)9798350313703

To enhance production planning efficiency, it's crucial to have well-structured models that align with metaheuristic and other optimization techniques. This research conducts a comparative analysis of three unique metaheuristic methods: sanitized-teaching-learning-based optimization (sTLBO), Particle Swarm Optimization (PSO), and Differential Evolution (DE) with a termination criterion of equal number of functional evaluations. The primary focus lies on profit-maximizing production planning within a single-level framework, encompassing intricate domain constraints, nonlinear costs, budget limitations and raw material constraints. The paper introduces three correction-based solution approaches. Upon evaluating 300 distinct instances of the problem, the study reveals that s-TLBO integrated with correction-based approach 1 and 3 consistently outperforms the other methods when it comes to devising optimal production plans for a Saudi Arabian petrochemical industry. This industry scenario involves 24 products, 54 processes, and three raw materials. © 2024 IEEE.

关键词： Combinatorial optimization

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Efficient Utilization of Metaheuristic Techniques for Profit Maximization in Combinatorial Production Planning: A Comparative Study 3

Efficient Utilization of Metaheuristic Techniques for Profit...

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3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

ISBN: (纸本)9798350313703

Efficient production planning requires well-structured models compatible with metaheuristic and other optimization techniques. This study compares three established metaheuristic methods - sanitized-teaching-learning-based optimization (s-TLBO), Particle Swarm Optimization (PSO), and Differential Evolution (DE) with a termination criterion of equal number of functional evaluations - for profit-maximizing production planning. The focus is on a single-level problem involving complex constraints, non-linear costs, budget and raw material limitations. The paper presents two solution strategies: a penalty-based and a correction-based approach. Analyzing 300 unique instances of the problem reveals that s-TLBO implemented with correction-based approach consistently outperforms the other methods in devising optimal production plans for two Saudi Arabian petrochemical industries with 24 products, 54 processes, and three raw materials for plant 1 and two raw materials for plant 2. © 2024 IEEE.

关键词： Combinatorial optimization

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Designing a low cost high performance permanent magnet motor drive system

Designing a low cost high performance permanent magnet motor...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Marcos A. A. Costa Edgar R. Braga-Filho Antonio M. N. Lima Graduate Program in Electrical Electrical Engineering - PPgEE Universidade Federal de Campina Grande Department of Electrical Engineering

ISBN: (纸本)9781479902255

Exploit the flux concentration design is good alternative for designing a relatively low cost synchronous motor based on ferrite magnets. The paper discusses the design of the feedback control laws for the stator current and mechanical speed of a synchronous motor in which the magnets are placed transversely along the rotor radius. The dynamic modeling as well as the parameter identification of the motor have been performed. Simulation and experimental results are presented to demonstrate the correctness of the methodology and the feasibility of proposed motor design and its related feedback control laws.

关键词： Permanent magnet motors Rotors Stators Synchronous motors Couplings Harmonic analysis Torque

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Measuring the radiation bands of overhead power lines glass insulators

Measuring the radiation bands of overhead power lines glass ...

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IEEE Conference on Antenna Measurements & Applications (CAMA)

作者： Pedro H. V. Rocha Glauco Fontgalland PPgEE-COPELE Post-Graduate Program in Electrical Engineering Electrical Engineering Department (DEE) Federal University of Campina Grande (UFCG) Campina Grande-PB Brazil

In this paper the characteristics radiation of overhead power lines glass insulators is investigated. Two feeding possibilities are used to analyze the radiation effects. The first feeding point is placed on the cap of the insulator and the second one is connected to the pin. The reflection coefficient (S 11 ) for two insulators covering the band of 30 MHz to 1 GHz was measured. The measurements were performed on insulators with different conservation states: one has a metal frame in good condition and the other one has both cap and pin parts rusted. The measured results show bands with good impedance matching (30 MHz to 200 MHz). The cleaned insulator reached S 11 = -18.7 dB at 127 MHz while -10.87 dB at 121.2 MHz was obtained for the rusty insulator. These spectral bands can be used in the analysis of insulator's conservation state and its interference characteristics.

关键词： Insulators Pollution measurement Transmission line measurements Glass Magnetic fields Resonant frequency Reflection coefficient

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