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2017 IEEE Latin American Conference on Computational Intelligence, LA-CCI 2017

作者： Costa, José Alfredo Ferreira Pinto, Antonio Paulo Vieira De Andrade, João Ribeiro De Medeiros, Marcial Guerra Department of Electrical Engineering UFRN Natal Brazil Production Engineering Program UFRN Natal Brazil

ISBN: (纸本)9781538637340

The Municipal Human Development Index (HDI) was established by the United Nations Development program. It uses data from longevity, education, and income to infer regional social and economic life quality. This work developed a multivariate analysis of the HDI data evolution in years 1991, 2000 and 2010 of 167 municipalities in Rio Grande do Norte State, northeast Brazil. Self-organizing (Kohonen or SOM) maps were used to perform clustering and data visualization. The approach uses map segmentation with k-means algorithm after SOM training. Transition analysis from municipalities in different studied years are performed, presenting ranking of clusters in terms of the three main HDI dimensions. Five groups of municipalities resulted from intragroup similarities and intergroup dissimilarities in each period. The segmented maps present similar municipalities. Thematic maps of the region after data clustering are also shown. © 2017 IEEE.

关键词： Self organizing maps

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Mechanical property determination for combined sheet and bulk metal forming process by plane strain compression test

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Materials Today: Proceedings 2018年第3期5卷 9376-9383页

作者： Nuttakorn Sae-Eaw Yingyot Aue-U-Lan Materials and Production Engineering program Department of Mechanical and Process Engineering Thailand The Sirindhorn International Thai-German Graduate School (TGGS) King Mongkut’s University of Technology North Bangkok Thailand

A new forming technique has been developed and improved to reduce the forming load, eliminate forming defects and minimize material waste. The Combined sheet and bulk metal forming process (SBMF) is developed by combining the advantages of both sheet and bulk forming processes. The workpiece is started by using a thick sheet. It will form the material by a common stamping process to preform a skeleton shape and later on the local feature is forged to get the precise dimension. To design this process, Finite Element Modeling (FEM) was applied for the process analysis to determine the flow behavior during the deformation. The flow stress is normally obtained from the conventional tests, namely, upsetting or tensile test, in which the flow behavior would be much different from the real behavior of the SBMF process. To make the simulation result more accurate, plane strain compression test (PSCT) was proposed to determine the flow stress of the material. To achieve the plane strain condition is not realistic and would be rather difficult. The spread exponent was proposed in the equation to determine the accurate effective stress which would compensate the effect of the nonplane strain condition. In this experiment, the material was SS316L with the thickness of 4.5 mm. Teflon and oils were used as lubricants to reduce friction. FEM of PSCT was conducted by using the flow stress obtained from PSCT with different friction coefficients. It was found that the load-stroke curve obtained from the Teflon lubrication condition could provide the friction coefficient closed to zero. This should be suitably used in the test for determining the flow stress in PSCT.

关键词： Plane strain compression test (PSCT) Flow stress Combined sheet and bulk metal forming process (SBMF)

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The effects of different types of welding current on the characteristics of nickel aluminum bronze using gas metal arc welding

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Materials Today: Proceedings 2018年第3期5卷 9535-9542页

作者： Suttipong Sriintharasut Bovornchok Poopat Isaratat Phung-on Production Engineering Department Faculty of Engineering King Mongkut’s University of Technology Thonburi Bangkok Thailand Department of Production Engineering Welding Engineering Program Faculty of Engineering King Mongkut’s University of Technology Thonburi Bangkok Thailand Maintenance Technology Center Institute for Scientific and Technological Research and Services (ISTRS) King Mongkut’s University of Technology Thonburi Bangkok Thailand

This study aims to investigate the effects of different types of welding current on the characteristics of Nickel Aluminum Bronze Alloy (NAB) such as microstructure, hardness, depth/width ratio and dilution by using Gas Metal Arc Welding (GMAW). The mechanized GMAW was employed for the bead on plate welding of NAB using 3 levels of heat input, 500-600 J/mm, 700-800 J/mm. and 800-900 J/mm with 2 types of welding current: standard and pulsed. The AWS.A5.7 ERCuNiAl solid wire and 100% argon shielding gas were applied. The results indicated that welding current types did not significantly affect the microstructures in the weld area and heat affected zone (HAZ).The hardness of welding from both welding current types were comparable with the average hardness of 160-180 HV in weld metal and 200-240 HV in the HAZ. Nevertheless the more heat per unit length (HI) was the higher depth/width ratio was. However, for pulsed current, the metal was transfer form solid wire to the NAB during the peak current of pulsed current resulting in deeper penetration but with higher dilution ratio compared to standard current. This could indicate that the pulsed current could be more appropriated for groove welding while the standard current for the built-up overlay welding.

关键词： Nickel aluminum bronze Standard current Pulsed current

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On graphs with adjacency and signless Laplacian matrix eigenvectors entries in {−1, +1}

arXiv

引用

arXiv 2019年

作者： Alencar, Jorge de Lima, Leonardo Instituto Federal de Educação Ciência e Tecnologia do Triângulo Mineiro Brazil Department of Business Federal University of Parana Paraná Brazil Systems and Production Engineering Program Federal Center of Technological Education Celso Suckow da Fonseca Rio de Janeiro Brazil

Let G be a simple graph. In 1986, Herbert Wilf asked what kind of graphs has an eigenvector with entries formed only by ±1? In this paper, we answer this question for the adjacency, Laplacian and signless Laplacian matrix of a graph. Besides, we generalize the concept of an exact graph to the adjacency and signless Laplacian matrices. Infinity families of exact graphs for all those matrices are *** codes 05C50 Copyright © 2019, The Authors. All rights reserved.

关键词： Matrix algebra

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Experimental investigation and optimal power flow modelling of the first renewable microgrid in Chocó, Colombia

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Energy Procedia 2019年 157卷 953-965页

作者： Edison Banguero Andrés Julián Aristizábal Arslan Habib Daniel Ospina Engineering and Industrial Production Program Universitat Politecnica de Valencia Camí de Vera s/n 46022 Valencia Spain Department of Engineering Universidad de Bogotá Jorge Tadeo Lozano Cr. 4 22-61 Bogotá 110311 Colombia School of Automation Northwestern Polytechnical Univeristy 127 Youyi Xilu Xi’an 710072 China Mewbourne College of Earth and Energy The University of Oklahoma 660 Parrington Oval Norman OK 73019 United States

This paper describes the operational performance results after one year of monitoring (2017), for the first photovoltaic (PV) micro-grid installed in Medio San Juan, Andagoya (at 5°05’34”N 76º41’43”W and 96m of altitude) in Chocó, Colombia. The renewable energy system consists of a 20 kW photovoltaic array, a three-phase grid connection inverter of the same capacity and a 132.7 kAh energy storage system. This microgrid (MG) is installed in the Renewable Energy Building of Chocó, Colombia. Power generation of the photovoltaic system and the behavior of the building’s energy storage system, was evaluated by a remote monitoring system, developed through the internet. An Optimal Power Flow (OPF) model is applied to analyze the building’s energy storage performance (integrated by two battery banks) and it is validated with the micro-grid performance results for each month of 2017. The results showed that the generation of altern (AC) PV- energy was 23301 kWh/year for 2017. The average of the photovoltaic system’s efficiency was 11.09 %. The correlation between the OPF model results and the stored energy reported 98.79% for the battery banks.

关键词： BIPV performance building-integrated renewables storage systems in buildings power flow model energy storage

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Organizational climate assessment using the paraconsistent decision method 8

Organizational climate assessment using the paraconsistent d...

引用

8th International Congress of Information and Communication Technology, ICICT 2018

作者： Kirilo, Caique Z. Abe, Jair M. De Lima, Luiz A. Lozano, Luiz Carlos Machi Nogueira, Marcelo De Oliveira, Cristina Correa Nakamatsu, Kazumi Graduate Program in Production Engineering Paulista University R. Dr. Bacelar 1212 São Paulo - SPCEP 04026-002 Brazil School of Human Science and Envronment University of Hygo Japan ALGORITMI Centre School of Engineering University of Minho Guimarães Portugal Federal Institute of São Paulo Bragança Paulista Portugal

The present study aims to show a model of organisational climate assessment through the integration of success codes and the Paraconsistent Decision Method. In this way, contributing to a previous scenario analysis that can return a more precise feedback of the organisational culture conditions of the organisation. © 2018 The Authors. Published by Elsevier Ltd.

关键词： Climate models

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Application of Response Surface Methodology for Biodiesel Synthesis Optimization Through Transesterification Reaction using h-zeolite/ki Heterogeneous Catalyst

引用

IOP Conference Series: Materials Science and engineering 2019年第1期536卷

作者： E Kurniasih P Pardi Department of Chemical Engineering Study Program of Industrial Chemical Technology Politeknik Negeri Lhokseumawe Aceh Departement of Chemical Engineering Study Program of Oil and Gas Production Politeknik Negeri Lhokseumawe Aceh

Biodiesel production based on crude palm oil (CPO) using heterogeneous catalysts is a new hope for solving the energy crisis. One type of heterogeneous catalyst is H-Zeolite/KI synthesized from natural zeolite impregnated with 0.05% (w/v) KI compound for 2 hours. The research focuses on determining the optimum operating conditions for biodiesel production using H-zeolite/KI catalysts. As raw material used CPO which has pre-treatment through an esterification reaction using 15% H2SO4 (w/v) as catalyst, temperature 65°C, stirrer speed of 400 rpm for 2 hours to reduce the free fatty acid content of raw materials up to 40%. Optimization of biodiesel production is carried out at the transesterification reaction. The research data was designed following the Response Surface Methodology (RSM) method using 3 independent variables and 5 levels, namely the ratio of H-zeolite/KI catalyst, transesterification temperature and mole methanol: CPO ratio with coded level (-1.682), (-1), (0), (+1), (+1.682). The research results show that the optimum operating conditions of biodiesel production were at the ratio of H-zeolite/KI catalyst at 2% - 2.5% (w/w), temperature at 45°C-50°C and mole ratio of methanol: CPO at (1:6). The biodiesel product was confirmed using gas chromatography and showed ester content of 88.02%. Characteristics of biodiesel products showed flash point 130C, acid number 0.4%, glycerol free 0%, viscosity 3.6 cP, density0.879 gr/cm3.

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Barriers to bicycle sharing systems implementation: analysis of two unsuccessful PSS

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Procedia CIRP 2018年 73卷 191-196页

作者： Suzana R. Moro Aline C. Imhof Diego C. Fettermann Paulo A. Cauchick-Miguel Post-graduate Program in Production Engineering Federal University of Santa Catarina Campus Universitário Trindade Caixa Postal 476 88040-970 Florianópolis SC Brazil Production and System Engineering Department Federal University of Santa Catarina Campus Universitário Trindade Caixa Postal 476 88040-970 Florianópolis SC Brazil

Bicycle sharing systems (BSS) arise as a proposal to respond to the challenges of urban mobility as a healthy, efficient, and relatively inexpensive mean of transportation. Although these systems are widespread, BSS still present challenges for implementation. In this context, this paper aims to identify the barriers to implementation of this kind of product-service systems (PSS) and to analyze which ones most impacted the failure of two BSS. The main results demonstrate that resistance to change both by users and those involved with the project hinders BSS implementation. Besides involving several actors, the system needs an adequate projection of the demand and costs. Some alternatives are: the integration of stakeholders in the development of the solution and the promotion of policies for the diffusion of sharing systems and education to conscious consumption. The results could be used in future PSS implementations to support overcoming the barriers.

关键词： Product-service system bicycle sharing system bike-sharing implementation barriers

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PAD-UFES-20: a skin lesion dataset composed of patient data and clinical images collected from smartphones

arXiv

引用

arXiv 2020年

作者： Pacheco, Andre G.C. Lima, Gustavo R. Salomão, Amanda S. Krohling, Breno A. Biral, Igor P. de Angelo, Gabriel G. Alves, Fábio C.R. Esgario, José G.M. Simora, Alana C. Castro, Pedro B.C. Rodrigues, Felipe B. Frasson, Patricia H.L. Krohling, Renato A. Knidel, Helder Santos, Maria C.S. do Espírito Santo, Rachel B. Macedo, Telma L.S.G. Canuto, Tania R.P. de Barros, Luíz F.S. Graduate Program in Computer Science Federal University of Espirito Santo Vitoria Brazil Faculty of Medicine Federal University of Espirito Santo Vitoria Brazil Federal University of Espirito Santo Vitoria Brazil Nature Inspired Computing Laboratory Federal University of Espirito Santo Vitoria Brazil Department of Specialized Medicine Federal University of Espirito Santo Vitoria Brazil Production Engineering Department Federal University of Espirito Santo Vitoria Brazil Secretary of Health of the Espírito Santo state Governor of Espírito Santo state Vitória Brazil Federal University of Espirito Santo Vitoria Brazil

Over the past few years, different computer-aided diagnosis (CAD) systems have been proposed to tackle skin lesion analysis. Most of these systems work only for dermoscopy images since there is a strong lack of public clinical images archive available to design them. To fill this gap, we release a skin lesion benchmark composed of clinical images collected from smartphone devices and a set of patient clinical data containing up to 22 features. The dataset consists of 1,373 patients, 1,641 skin lesions, and 2,298 images for six different diagnostics: three skin diseases and three skin cancers. In total, 58.4% of the skin lesions are biopsy-proven, including 100% of the skin cancers. By releasing this benchmark, we aim to aid future research and the development of new tools to assist clinicians to detect skin cancer. Copyright © 2020, The Authors. All rights reserved.

关键词： Dermatology

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Sensory Profile of Fermented Arabica Coffee in the Perception of American Cupping Tasters

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Agricultural Sciences 2019年第3期10卷 321-329页

作者： Lucas Louzada Pereira Rogério Carvalho Guarconi Tais Rizzo Moreira Dério Brioschi Jr. Joao Paulo Pereira Marcate Luiz Henrique Bozzi Pimenta de Sousa Aldemar Polonini Moreli Danieli Grancieri Debona Carla Schwengber Ten Caten Federal Institute of Education Science and Technology of Espírito Santo Venda Nova do Imigrante CampusFood Science and Technology ProgramRua Elizabeth Minete PerimVitóriaBrazil Capixaba Institute for Technical Assistance Research and ExtensionINCAPERDepartment of StatisticsDomingos MartinsBrazil Department of Forest Sciences and Wood Federal University of Espirito SantoCenter for Agrarian Sciences and EngineeringJeronimo MonteiroBrazil Department of Production and Transportation Engineering Federal University of Rio Grande do SulPorto AlegreBrazil

The consumption of specialty coffees has been growing year after year, indicating that several niches and market forms according to the sensorial orientation of the consumers, as well as the cupping tasters and agents are responsible for the composition of blends, and for the physical and sensory classification of the coffees in the industry. This study presented 5 methods of spontaneous and induced fermentation to different North American cupping tasters, in order to evaluate coffee quality potential, based on the Specialty Coffee Association (SCA) protocol. During the months of May to July of 2017, 150 coffee samples were evaluated. Initial results indicate that North American cupping tasters evaluated dry fermented coffees using yeast culture as superiors, in the sensorial aspect, than the more conventional methods in Brazil. Such indication opens new discussions on the acceptance of a determined product, followed by the potential for modification of the sensory route as of the fermentation that will affect the attributes.

关键词： Arabica Coffee Fermentation Acceptance Cupping Tasters

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