CAISER v. 0.3.3

Version 0.3.3 of the CAISEr package has just been released on CRAN. CAISEr is a package for estimating the required sample sizes for experimental comparisons of algorithms, and this small maintenance update fixes a few rare bugs. It also provides some capabilities for saving intermediate results and restarting interrupted experiments. As usual, the development version is available on Github.

Paper published: EPSR

We're very happy to announce that our paper Scheduling maneuvers for the restoration of electric power distribution networks: Formulation and heuristics, by André Maravilha, Fillipe Goulart, Eduardo Carrano and Felipe Campelo, has just been published in Electric Power Systems Research (IF: 2.856). This is the second of two very interesting papers (the other being this one, published earlier this year) that resulted from a R&D project developed by ORCS Lab for power distribution utility Eletrobrás/CERON.

Click below for the abstract, or here to check the paper (free access here until the end of August/2018).

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Package CAISEr v. 0.3 released!

Today marks the release on CRAN of version 0.3 of the CAISEr package for sample size calculation(s) for experimental comparisons of algorithms. This new version includes improved multicore support for Linux / Unix / Mac OS and Solaris platforms, options for saving partial results to file, improved plot functions, a better progress bar (which provides an ETA!) and minor improvements to the calculation of power curves, as well as minor bug fixes. As usual, the development version is available on Github.

Paper accepted: IJEPES

[EDIT] The paper is now available online: https://authors.elsevier.com/c/1Wr7BWJH6Hipa

We're proud to announce that Fillipe Goulart and André Maravilha's paper Permutation-based Optimization for the Load Restoration Problem with Improved Time Estimation of Maneuvers, co-authored by Professors Eduardo Carrano and Felipe Campelo, has been accepted for publication by the International Journal of Electrical Power & Energy Systems (IF: 3.289). This paper summarizes a significant part of Fillipe's PhD work, and is the first of two great papers (the other one, also by the same authors, is still under review) that resulted from a very interesting R&D project developed by ORCS Lab for power distribution utility Eletrobrás/CERON.

Click below for the abstract.

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M.Sc. presentations: Jean and Francirley

We're happy to invite everyone to Jean and Francirley's respective M.Sc. defences. Both works were developed under the supervision of Prof. Lucas Batista, and will be presented in the coming weeks.

Click below for more details.

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Paper accepted: ITOR

We're happy to announce that our paper A Recombination-based Matheuristic for Mixed Integer Programming Problems with Binary Variables, co-authored by André Maravilha, Eduardo Carrano and Felipe Campelo, has just been accepted at the International Transations on Operations Research (IF: 1.745). It was under review for almost two years! Congratulations to all authors for their great work (and resilience)!

Click below for the abstract.

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Paper published: Expert Systems with Applications

Now that's some good news! André Batista has just published his very first journal paper, at Elsevier's Expert Systems with Applications (IF: 3.928), vol. 99, pp. 180-192, 2018. The paper, titled Demand Side Management Using a Multi-Criteria epsilon-Constraint based Exact Approach, was co-authored by André and his father uncle advisor, Prof. Lucas S. Batista.

The paper is already available online, and is under an early open-access window until early March. Go take a look, or click below for the abstract.

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ExpDE 1.4 now on CRAN

The second release version of R package ExpDE, a standardised modular implementation of Differential Evolution for the experimental investigation of operators, was released today on CRAN: https://cran.r-project.org/package=ExpDE. This version includes some minor bug fixes and features two new differential mutation variants.

Package CAISEr v. 0.2.1 released!

The first release version of R package CAISEr, which implements a methodology for sample size calculations in experimental comparisons of algorithms, was released today. The package is available from CRAN, and can be installed from the R prompt using install.packages("CAISEr").

This package is the result of work by ORCS members Prof. Felipe Campelo and Fernanda Takahashi. The full description of the methodology and results generated with this package were submitted as a research paper to the Journal of Heuristics.

Best paper award - ENIAC 2017

We're very pleased to report that our paper "A Preference-guided Multiobjective Evolutionary Algorithm based on Decomposition", by Daniel de Souza, Fillipe Goulart, Lucas Batista and Felipe Campelo was selected as one of the top 3 papers at ENIAC2017 - Encontro Nacional de Inteligência Artificial e Computacional (National Meeting on Artificial and Computational Intelligence), currently happening in Uberlândia/MG, Brazil. Daniel presented the paper, which was written as part of his M.Sc. work, this last afternoon. Congratulations!

You can read the abstract by clicking "Read More" below.

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Paper Acceped: ASOC

The Ph.D. work of Wagner Bachur has just been accepted for publication at Elsevier's Applied Soft Computing (IF: 2.857), under the title A Multiobjective Robust Controller Synthesis Approach Aided by Multicriteria Decision Analysis. The work is authored by Wagner Bachur, Eduardo N. Gonçalves, Jaime A. Ramírez, and Lucas S. Batista.

Click below for the abstract.

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Fernanda's Qualification Exam

We're happy to invite everyone to Fernanda Takahashi's Ph.D. qualification exam. Her work Sample Size Estimation For Power And Accuracy In The Experimental Comparison of Metaheuristics will be presented on May 31st 2017 2 p.m., at the Seminar Room T005. Besides Fernanda's advisor, ORCS Lab's Prof. Felipe Campelo, the qualification committee will be composed by:

  • Prof. Thiago Noronha, DCC-UFMG
  • Prof. Luiz Duczmal, Dep. Statistics - UFMG
  • Prof. Helio Barbosa, LNCC

Click below for the abstract.

Update: click here for pictures!

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April Defense Madness

In the next two weeks we'll be having four (FOUR!) defenses by ORCS Lab's students! All students are invited as usual, and the academic community in general is always very welcome as well!

Check below for details.

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MOEADr package 0.2.1 released

The first release version of R package MOEADr, a standardised modular implementation of Multiobjective Evolutionary Algorithms based on Decomposition (MOEA/D), was released today. Version 0.2.1 contains several variants of decomposition strategies, aggregation functions, variation operators, neighborhood assignment rules, update strategies and more. It also integrates seamlessly with package smoof, which provides standard implementations of several benchmark sets for multiobjective optimization.

This package is the result of a joint project between ORCS Lab's Felipe Campelo and Lucas Batista and University of Tsukuba's Claus Aranha, and is part of an upcoming paper on component-wise modeling of MOEA/Ds (stay tuned!).

You can install the package from the R console by typing

install.packages("MOEADr")

Accepted papers - Update

It's been a while since we posted updates here, so today we have a two-hit combo:

  • The PhD work of Alexandre Pimenta has just been accepted for publication at Springer's Computational Economics (IF: 0.691), under the title An Automated Investing Method for Stock Market Based on Multiobjective Genetic Programming. The work is authored by Alexandre Pimenta, Ciniro Nametala, Frederico G. Guimarães, and Eduardo Carrano;

  • George Fonseca is at it again, having just landed a paper in the European Journal of Operational Research (IF: 2.679). His work Integer Programming Techniques for Educational Timetabling was authored by himself, Haroldo Santos, Eduardo Carrano and Thomas Stidsen, and is one of the outcomes of George's time working under Prof. Stidsen at the Technical University of Denmark.

Click below to access both abstracts.

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Ciniro's M.Sc. Thesis Presentation

We're happy to invite everyone to Ciniro's presentation of his dissertation,

Construção de um Robô Investidor baseado em Redes Neurais Artificiais e Preditores Econométricos.

on February 20th 2017, 9:30a.m., at EEUFMG's Seminar Room III. Besides Ciniro's advisor, ORCS Lab's Prof. Eduardo Carrano, the dissertation committee will be composed by:

    • Prof. Felipe Campelo (ORCS Lab, Dept. Electrical Engineering, UFMG)
    • Prof. Adriano César Machado Pereira (Dept. Computer Science, UFMG)
    • Prof. Rodrigo Tomás Nogueira Cardoso (Dept. Physics and Mathematics, CEFET-MG)

Click below to read the abstract [UPDATE: and for a picture.]

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Papers accepted: two-hit combo!

ORCS Lab's Prof. Eduardo Carrano has received excellent news today, with two of his papers being accepted for publication on the same day!

The first one, accepted for publication in the IET Generation, Transmission & Distribution journal (IF: 1.576) is titled Robust Coordination of Directional Overcurrent Relays Using a Matheuristic Algorithm, by Mateus Costa, Rodney Saldanha, Martín Ravetti and Eduardo Carrano, is a result of Mateus' Ph.D. work (under prof. Carrano) in collaboration with UFMG professors Saldanha (Dept. Electrical Engineering) and Ravetti (Dept. Production Engineering). 

The second, to appear in the Transactions of the Institute of Measurement and Control (IF: 0.820) is the manuscript Fixed Time Traffic Signal Optimization Using a Multiobjective Evolutionary Algorithm and Microsimulation of Urban Networks, by Breno Costa, Samara Leal and Paulo Almeida (all from CEFET-MG) together with Eduardo Carrano.

You can find the abstracts by clicking the "Read More" button below.

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André's Qualification Exam

André Maravilha will be presenting his Ph.D. qualification, titled Heurísticas Baseadas Em Modelos Para Problemas De Otimização Combinatória on September 22th 2016, starting at 9:00 a.m.. Besides Profs. Felipe Campelo and Eduardo Carrano (André's advisors), the qualification committee is composed by:

  • Prof. Geraldo Robson Mateus (Dept. Computer Science, UFMG)
  • Prof. Martín Ravetti (Dept. Production Engineering, UFMG)
  • Prof. Alexandre Delbem (Inst. Mathematical and Computational Sciences, USP)

All ORCS Lab graduate and undergraduate students are invited to the presentation.

[EDIT: 2016-09-23] - A few pictures can be seen here

Paper accepted - Electric Power Systems Research

We're very proud to inform that the work

Multiobjective Planning of Power Distribution Networks with Facility Location for Distributed Generation

by Cristiane Taroco, Ricardo Takahashi, and Eduardo G. Carrano has been accepted for publication in the Electric Power Systems Research (IF: 1.809). This paper reports some results of Cristiane's Ph.D. work under Prof. Carrano's supervision. You can read the abstract by clicking the "Read More" button below.

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GECCO 2016

ORCS Lab is joining GECCO'2016, one of the top conferences in the evolutionary computation and metaheuristics fields. Prof. Felipe Campelo is presenting two papers:

  • F. Campelo, M. Botelho, Experimental Investigation of Recombination Operators for Differential Evolution. DOI: 10.1145/2908812.2908852
  • M. Teixeira, F. Goulart, F. Campelo, Evolutionary Multiobjective Optimization of Winglets. DOI: 10.1145/2908812.2908848

Prof. Campelo is also presenting an invited talk in the Evolutionary Computation in Practice workshop, titled EAs in Aeronautical Optimization - Some Results and Challenges

The presentation slides can be seen here, here, and here.

Moisés' M.Sc. Presentation

Moisés' M.Sc. dissertation, Análise Experimental de Operadores de Recombinação para o Algoritmo de Evolução Diferencial ("Experimental analysis of recombination operators for the differential evolution algorithm") will be presented at UFMG's School of Engineering, seminar room 1012, on July 15th 2016. The public presentation is scheduled to start at 2p.m., and all ORCS Lab members are invited to attend.

Besides Moisés' advisor Prof. Felipe Campelo, the dissertation committee will be composed of ORCS Lab's Prof. Lucas Batista and by PPGEE coordinator Prof. Rodney Saldanha.

[EDIT: click here for pictures.]

E-book released

The (Portuguese-only) e-book Mac OSX: Comandos Básicos e Avançados has just been released by the Andarilho collaboration. The book, written by Alessandro Vivas, Luciana Assis and ORCS Lab's André Maravilha, provides a general introduction to OSX's terminal, alongside with tips, tricks and hacks, organised in a way that simplifies the life of even reasonably experienced Mac users.

The book can be downloaded for free, right here.

AIMDay - Smart Industries

ORCS Lab will be joining the AIMDay: Smart Industries event that will be held in Belo Horizonte this coming Thursday. This particular event aims at bringing together industrial and academic partners from Brazil and Sweden, to discuss pressing problems in the context of the Smart Industries concept (also known as Industry 4.0). The faculty members of ORCS Lab will be involved in discussions on mathematical and statistical modelling, as well as optimisation, of problems in manufacturing, emergency management, mining and others. The full program of the event is available here.

Paper accepted - Computers and Operations Research

We're very happy to announce that the paper:

Integrating Matheuristics and Metaheuristics for Timetabling

by George H.G. Fonseca, Haroldo G. Santos, and Eduardo G. Carrano, has been accepted for publication in the prestigious Computers and Operations Research (IF: 1.861). The paper reports on results that are part of George's Ph.D. work under the supervision of Prof. Carrano, and describes strategies that provide the best known results for 15 out of 17 benchmark instances of the High School Timetabling Problem.

You can read the abstract by clicking the "Read More" button below, or check the early access version of the paper here.

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Michel Gendreau at PPGEE-UFMG

Prof. Michel Gendreau from the Polytechnique Montréal and the University of Montréal will be presenting the main research topics developed by the Interuniversity Research Centre on Enterprise Networks, Logistics and Transportation (CIRRELT) this coming Tuesday (April 19) at 2p.m.. The presentation will be held at the Seminar Room 1010.

Michel Gendreau is an Associate Professor with the Department of Informatics and Operations Research at the University of Montréal, and a Professor with the Department of Mathematical and Industrial Engineering at the Polytechnique Montréal. His main research topics include network and transportation optimization, vehicle routing, metaheuristics, and applications to energy and communications systems.

All ORCS Lab students are invited to the talk.

André's Ph.D. presentation

André will be defending his Ph.D. thesis at 9 a.m. this Friday, April 8th 2016. The work will be presented at PPGEE's room 2418-A, School of Engineering, UFMG. The work was advised by Prof. Felipe Campelo

The thesis committee will be composed of the three ORCS Labs professors, as well as by Profs. Jaime Ramirez and Frederico Guimarães (Dept. Electrical Engineering, UFMG), Prof. Elizabeth Wanner (Dept. Computing, CEFET-MG), and Prof. Rodrigo Cardoso (Dept. Mathematics, CEFET-MG). All ORCS Lab graduate and undergraduate students are invited to the presentation.

ExpDE version 0.1 lauched

The first release version of R package ExpDE, a standardised modular implementation of Differential Evolution for the experimental investigation of operators, was released today. The package was also submitted to CRAN. This package is the result of work by Prof. Felipe Campelo and his M.Sc. student Moisés Botelho. Some initial results generated with this package were accepted for publication at this year's GECCO conference.


Update (2016-03-26): The package is now also available on CRAN: https://cran.r-project.org/web/packages/ExpDE/.

3 papers accepted for presentation @GECCO'2016

Very good Sunday news: we just got the message that three of our works (out of three submitted - 100% efficiency!!!) were accepted for presentation in the Genetic and Evolutionary Computation Conference (GECCO) 2016, to be held in Denver/CO in the coming July. Considering the high threshold of the GECCO conferences, this high rate of acceptance is quite encouraging!

The accepted manuscripts were:

Congratulations to all students involved in these papers. Keep up the great work!

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Paper Accepted: IET Generation, Transmission and Distribution Journal

We are proud to announce that the manuscript:

Multicriteria Transformer Asset Management with Maintenance and Planning Perspectives

co-written by Felipe Campelo, Lucas Batista, Ricardo Takahashi, Henrique Diniz and Eduardo Carrano has been accepted for publication in the prestigious IET Generation, Transmission and Distribution (IF: 1.353). This paper is the result of a very fruitful R&D cooperation with Brazilian energy juggernaut CEMIG.

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  1. Eric's M.Sc. presentation
  2. ORCS Lab Alumni
  3. George's Qualification Exam
  4. DEMO "toolbox" available