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17th Biennial IEEE Conference on Electromagnetic Field Computation, IEEE CEFC 2016

作者： Eckert, Paulo R. Righi, Luiz A. Filho, Aly F. Flores Kanieski, Joao M. Federal University of Rio Grande do Sul Post-Graduate Program in Electrical Engineering RS Brazil Federal University of Santa Maria Department of Electromechanical and Power Systems RS Brazil

ISBN: (纸本)9781509010325

This paper presents a method to determine hysteresis parameters of an inductor's core with a closed magnetic circuit based on electric current and voltage curves of a damped LC circuit. The proposed procedure makes use of the concept of hysteresis modeling by separating the magnetic field into four components, which can be linearized in terms of its parameters. Thus, curves can be adjusted with a stochastic method in order to match experimental ones, allowing for determination of hysteresis parameters. © 2016 IEEE.

关键词： Hysteresis

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Electromagnetic device optimization using improved differential evolution methods

Electromagnetic device optimization using improved different...

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12th Biennial IEEE Conference on Electromagnetic Field Computation, CEFC 2006

作者： Coelho, Leandro Dos Santos Alotto, Piergiorgio Production and Systems Engineering Graduate Program Automation and Systems Laboratory Pontifical Catholic University of Paraná Imaculada Conccicao 1155 80215-901 Curitiba Paraná Brazil Dip. Ingegneria Eleurica University di Padova Italy

ISBN: (纸本)1424403200

Recently, evolutionary algorithms (e.g. genetic algorithms, evolutionary programming, and evolution strategies) have proven to be useful tools for the optimization of difficult problems in electromagnetics. Differential evolution (DE) is one comparatively simple variant of an evolutionary algorithm using floating-point encoding and few control parameters. This work presents improved DE algorithms based on linearly time varying control parameters, sinusoidal functions, and diversity analysis of population. © 2006 IEEE.

关键词： Electromagnets

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Ontologies for support preventive maintenance processes of critical IT assets 22

Ontologies for support preventive maintenance processes of c...

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22nd International Conference on production Research, ICPR 2013

作者： Czelusniak, D.J. De Abreu, A.F. Souza, J.A. Dergint, D.E.A. Federal University of Santa Catarina Engineering Production Post Graduate Program Technological Center P.O. Box 476 Trindade Florianópolis SCCEP 88010-970 Brazil Federal University of Santa Catarina Knowledge Management Engineering Post Graduate Program Technological Center P.O.Box 476 Trindade Florianópolis SC.CEP 88010-970 Brazil Federal Technological University of Paraná Technology Post Graduate Program 3165 Sete de Setembro Avenue Rebouças Curitiba PR.CEP 80230-901 Brazil

The goal of this paper is to show a study to evaluate the possibility of using ontologies to support maintenance procedures in IT equipment in a small power company. The aim is to improve the degree of reliability in detection of potential failures and defects in maintenance processes of information technology critical assets, trying to obtain less downtime of services that they provide. The methodological procedures used in this study were literature review, to present the modeling concepts of knowledge focused on ontologies creation and state of the art in building of field procedures describing the steps from initial drafting of ontology finishing with their tests. The results demonstrate that it is viable to utilize this technique, where the network equipment that keeps critical services require high level of availability on meeting the needs of the corporation.

关键词： Ontology

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Brazilian import transport network of fertilizer (NPK): An analysis using SNA 8

Brazilian import transport network of fertilizer (NPK): An a...

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8th International Conference on Information systems, Logistics and Supply Chain: Interconnected Supply Chains in an Era of Innovation, ILS 2020

作者： Dos Reis, João Gilberto Mendes Machado, Sivanilza Teixeira Neto, Fernando Gorni De Souza, Aguinaldo Eduardo De Alencar Naas, Irenilza RESUP - Supply Network Research Group Post-Graduate in Production Engineering Universidade Paulista - UNIP São Paulo Brazil Post-Graduation Program in Agribusiness Universidade Federal da Grande Dourados - UFGD Dourados Brazil Federal Institute of Sao Paulo Campus Suzano Brazil

The world population is expected to increase to 9.8 billion by 2050, increasing food demand. Fertilizer is one of the key factors that can increase food production in the world. This article aims to investigate the flow of fertilizers among country origin, main ports of entry in Brazil, and international suppliers. For this purpose, data were collected from the Brazilian Ministry of Industry and Foreign Trade, and we analyzed these data using the Ucinet 6.0 ® and Netdraw ® software. The results showed that imports of fertilizing products to Brazil are concentrated in Santos and Paranagua ports. © Interconnected Supply Chains in an Era of Innovation - Proceedings of the 8th International Conference on Information systems, Logistics and Supply Chain, ILS 2020. All rights reserved.

关键词： Fertilizers

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Resolution of one-dimensional bin packing problems using augmented neural networks and minimum bin slack

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International Journal of Innovative Computing and Applications 2016年第4期7卷 214-224页

作者： de Almeida, Ricardo Steiner, Maria Teresinha Arns Industrial and Systems Engineering Post-Graduate Program Pontifical Catholic University of Paraná - PUCPR Curitiba Brazil

The objective of this work is to compare the augmented neural network (AugNN) metaheuristic to minimum bin slack (MBS) heuristic to solve combinatorial optimisation problems, specifically, in this case, the one-dimensional bin packing problem (1D-BPP), a class of cutting and packing problems (CPP). CPP are easily found among various industry sectors and its proper treatment can improve the use of stocks in cutting problems or optimise physical space in packing problems. In order to optimise AugNN parameters, a design of experiment (DOE) was applied in order to guide a statistical analysis of different configurations of AugNN. The tests, developed in many benchmark problems found in the literature, showed that MBS heuristic was, in general superior, both in terms of the solution quality, which is about 70% better, and computational time, which is about 90% less. Copyright © 2016 Inderscience Enterprises Ltd.

关键词： Design of experiments

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Mandatory and discretionary policies for CORBA security

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Journal of Network and systems Management 2005年第3期13卷 309-328页

作者： Westphall, Carla Merkle Da Silva Fraga, Joni Caixa Postal 476 88040-970 Florianópolis SC Brazil Department of Automation and Systems Post-Graduate Program in Electrical Engineering Federal University of Santa Catarina Florianópolis SC Brazil Rua Capitão Américo CEP 88037-060 Florianopolis SC Brazil

This paper proposes extending the CORBA (Common Object Request Broker Architecture) security model to make possible the use of mandatory policies and policy management in distributed applications. Mandatory policies and a policy service were proposed for insertion in the JaCoWeb Project, which is developing an authorization scheme for large-scale networks based on CORBA security standards. In this paper, there is a combination of client-side and server-side access control, in a single domain. Our mandatory control is carried out on the level of ORB (Object Request Broker), on the client side, preventing, in unauthorized accesses, the emission of the corresponding requisition, the associated processing on the server and also, the generation of new requests through this unauthorized processing. In this paper, operations of security management not currently included in the OMG standards are also proposed. The paper further presents implementation results and an evaluation of these results based on common criteria. © 2005 Springer Science+Business Media, Inc.

关键词： Security of data

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A multivariable coupling design for variable structure control using particle swarm optimization

A multivariable coupling design for variable structure contr...

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2006 ASME International Mechanical engineering Congress and Exposition, IMECE2006

作者： Dos Santos Coelho, Leandro Mariani, Viviana Cocco Pontifical Catholic University of Parana Production and Systems Engineering Graduate Program PPGEPS / CCET / PUCPR Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil Pontifical Catholic University of Parana Mechanical Engineering Graduate Program PPGEM / CCET/ PUCPR Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil

ISBN: (纸本)0791837904

This paper presents a new discrete-time sliding-mode control design for multiple-input multi-output (MIMO) systems with tuning parameters by particle swarm optimization (PSO). PSO is a kind of evolutionary algorithm based on a population of individuals and motivated by the simulation of social behavior instead of the survival of the fittest individual. Several control algorithms are presented, two decoupling design and six new approaches of the coupling design of sliding-mode control without the necessity of calculate the process interactor matrix. SMC needs a design tool for parameter configuration and efficient practically to deal with multivariable processes. Simulations are carried out using both decoupling and coupling discrete-time SMC designs. Results shown that the new proposed approach for designing the discrete-time coupling SMC is a powerful tool and it performs better than the decoupling design, usually utilized in MIMO process. The simulations are assessed on a robotic manipulator of two degree-of-freedom (2-DOF), that constitute a MIMO nonlinear coupling dynamic system, with treatment of payload mass and link length variations. Simulation results show that the application of this control strategy effectively improve the trajectory tracking precision of position and velocity variables. Copyright © 2006 by ASME.

关键词： Sliding mode control

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Discrete variable structure control based on optimization by cultural differential evolution approach

Discrete variable structure control based on optimization by...

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2006 ASME International Mechanical engineering Congress and Exposition, IMECE2006

作者： Dos Santos Coelho, Leandro Mariani, Viviana Cocco Pontifical Catholic University of Parana Production and Systems Engineering Graduate Program PPGEPS / CCET/ PUCPR Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil Pontifical Catholic University of Parana Mechanical Engineering Graduate Program PPGEM / CCET/ PUCPR Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil

ISBN: (纸本)0791837904

Advanced conceptions to design industrial control systems are, in general, dependent of mathematical models of the controlled process. Also, the task of the controllers is to achieve an optimum performance when facing with various types of disturbances that are, sometimes, unknown in practical applications. An advanced methodology for control design is the variable structure control (VSC) with sliding mode. This paper considers the non-linear control of industrial processes based on self-tuning discrete VSC technique. A novel and systematic VSC design methodology is proposed, which integrates an estimator based on recursive least square algorithm, a discrete quasi-sliding surface and a optimization method. Contrary to the trial and error selection of the variable structure feedback gains reported in the literature, the selection in present work is done using differential evolution (DE) optimization, an evolutionary computation technique, with a new operator based on normative knowledge of cultural algorithms. The proposed design has been applied to a control valve described by a non-linear Wiener model. Numerical simulation results reveal that the new DE approach is applicable and promising for the VSC design. Copyright © 2006 by ASME.

关键词： Optimal control systems

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Mechanical design using quantum-behaved particle swarm optimizer with exponential mutation operator

Mechanical design using quantum-behaved particle swarm optim...

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2006 ASME International Mechanical engineering Congress and Exposition, IMECE2006

作者： Dos Santos Coelho, Leandro Marian, Viviana Cocco Production and Systems Engineering Graduate Program PPGEPS / CCET / PUCPR Pontifical Catholic University of Parana Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil Mechanical Engineering Graduate Program PPGEM / CCET/ PUCPR Pontifical Catholic University of Parana Imaculada Conceicao 1155 80215-901 Curitiba Parana Brazil

ISBN: (纸本)0791837904

Particle swarm optimization (PSO) is a population-based swarm intelligence algorithm that shares many similarities with evolutionary computation techniques. However, the PSO is driven by the simulation of a social psychological metaphor motivated by collective behaviours of bird and other social organisms instead of the survival of the fittest individual. Inspired by the classical PSO method and quantum mechanics theories, this work presents new Quantum-behaved PSO (QPSO) approaches using mutation operator with exponential probability distribution. The simulation results demonstrate good performance of the QPSO in solving a well-studied continuous optimization problem of mechanical engineering design. Copyright © 2006 by ASME.

关键词： Quantum theory

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Exploring the Critical Factors for Sustainable Product-service systems Implementation and Diffusion in Developing Countries: An Analysis of two PSS Cases in Brazil

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Procedia CIRP 2016年 47卷 454-459页

作者： Thayla T. Sousa-Zomer Paulo A. Cauchick Miguel Post Graduate Program in Production Engineering Federal University of Santa Catarina (UFSC) Florianópolis Brazil Production and System Engineering Department Federal University of Santa Catarina (UFSC) Florianópolis Brazil

This paper aims at exploring how some factors identified in the PSS and product/service innovation literature can hinder or foster sustainable PSS implementation in developing countries, since there is a lack of knowledge concerning the characteristics of PSS transition processes in different contexts. The identified factors were investigated empirically, through two PSS solutions located in an emerging economy. The main results demonstrated the role of some potential factors in supporting the implementation and diffusion of PSS solutions, especially those related to the involvement of multiple actors in the value creation and the social embeddedness. However, the role of those factors still need to be investigated in future works, since only two cases were analyzed in this research. Analyses of successful and unsuccessful PSS cases as well as the identification of other factors and characteristics of PSS implementation in different contexts are directions for further research.

关键词： product-service systems PSS sustainability developing countries.

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