Rui Araújo – Publications

Rui Araújo - Publications 2017

Jérôme Mendes, Luís Osório, and Rui Araújo. Self-tuning pid controllers in pursuit of plug and play capacity. Control Engineering Practice, 69:73--84, December 2017. [ bib | DOI | .pdf ]

Saeid Rastegar, Rui Araújo, and Jérôme Mendes. Online identification of takagi-sugeno fuzzy models based on self-adaptive hierarchical particle swarm optimization algorithm. Applied Mathematical Modelling, 45:606--620, May 2017. [ bib | DOI | .pdf ]

2016

Saeid Rastegar, Rui Araújo, and Jérôme Mendes. A new approach for online t-s fuzzy identification and model predictive control of nonlinear systems. Journal of Vibration and Control, 22(7):1820--1837, April 2016. [ bib | DOI | .pdf ]

Francisco A. A. Souza, Rui Araújo, and Jérôme Mendes. Review of soft sensors methods for regression applications. Chemometrics and Intelligent Laboratory Systems, 152:69--79, March 2016. [ bib | DOI | .pdf ]

Symone G. Soares and Rui Araújo. An adaptive ensemble of on-line extreme learning machines with variable forgetting factor for dynamic system prediction. Neurocomputing, 171:693--707, January 2016. [Symone Soares, and Rui Araújo, “The OEOA Toolbox”; source code]. [ bib | DOI | .pdf ]

André R. de Miranda, Talles M. G. de A. Barbosa, Rui Araújo, and Symone G. S. Alcalá. An on-line extreme learning machine with adaptive architecture for soft sensor design. In Proc. of the The IEEE Sensors 2016 (SENSORS 2016), pages 1--3, Orlando, FL, USA, October 30 - November 2 2016. IEEE. [ bib | DOI | .pdf ]

2015

Leonaldo Silva Gomes, Francisco Alexandre A. Souza, Ricardo Silva Thé Pontes, Tobias R. Fernandes Neto, and Rui Alexandre M. Araújo. Coagulant dosage determination in a water treatment plant using dynamic neural network models. International Journal of Computational Intelligence and Applications, 14(03):1550013--1--1550013--18, September 2015. [ bib | DOI | .pdf ]

Ricardo Maia, Marco Silva, Rui Araújo, and Urbano Nunes. Electrical vehicle modeling: A fuzzy logic model for regenerative braking. Expert Systems with Applications, 42(22):8504--8519, December 2015. [Ricardo Maia, Marco Silva, Rui Araújo, and Urbano Nunes, “The FLmRB Toolbox and Data Sets”, 2015; software, and Nissan Leaf electric vehicle regenerative braking data sets]. [ bib | DOI | .pdf ]

Tiago Matias, Francisco Souza, Rui Araújo, Nuno Gonçalves, and João P. Barreto. On-line sequential extreme learning machine based on recursive partial least squares. Journal of Process Control, 27:15--21, March 2015. [ bib | DOI | .pdf ]

Symone G. Soares and Rui Araújo. A dynamic and on-line ensemble regression for changing environments. Expert Systems with Applications, 42(6):2935--2948, April 2015. [Symone Soares, and Rui Araújo, “The DOER Toolbox”; source code]. [ bib | DOI | .pdf ]

Symone Gomes Soares and Rui Araújo. An on-line weighted ensemble of regressor models to handle concept drifts. Engineering Applications of Artificial Intelligence, 37:392--406, January 2015. [Symone Soares, and Rui Araújo, “The OWE Toolbox”, 2015; Symone Soares, and Rui Araújo, “The Toolbox of Regression Datasets for Concept Drifts”, 2015; source codes and data sets]. [ bib | DOI | .pdf ]

2014

Jérôme Mendes, Rui Araújo, Tiago Matias, Ricardo Seco, and Carlos Belchior. Automatic extraction of the fuzzy control system by a hierarchical genetic algorithm. Engineering Applications of Artificial Intelligence, 29:70--78, March 2014. [ bib | DOI | .pdf ]

Francisco A. A. Souza and Rui Araújo. Mixture of partial least squares experts and application in prediction settings with multiple operating modes. Chemometrics and Intelligent Laboratory Systems, 130:192--202, January 2014. [Francisco A. A. Souza, and Rui Araújo, “The Mix-PLS Toolbox”, 2013; source code; also available here]. [ bib | DOI | .pdf ]

Symone G. Soares and Rui Araújo. Semantic place labeling using a probabilistic decision list of adaboost classifiers. International Journal of Computer Information Systems and Industrial Management Applications (IJCISIMA), 6:548--559, 2014. [ bib | .pdf ]

Oswaldo Ludwig, Urbano Nunes, and Rui Araújo. Eigenvalue decay: a new method for neural network regularization. Neurocomputing, 124:33--42, January 2014. (Matlab code for Support Vector Neural Network is available here.). [ bib | DOI | .pdf ]

Tiago Matias, Francisco Souza, Rui Araújo, and Carlos Henggeler Antunes. Learning of a single-hidden layer feedforward neural network using an optimized extreme learning machine. Neurocomputing, 129:428--436, April 2014. [Tiago Matias, Francisco Souza, and Rui Araújo, “The O-ELM Toolbox”, 2013; source code]. [ bib | DOI | .pdf ]

Francisco Souza and Rui Araújo. Online mixture of univariate linear regression models for adaptive soft sensors. IEEE Transactions on Industrial Informatics, 10(2):937--945, May 2014. [Francisco Souza, and Rui Araújo, “The MULRM Toolbox”, 2013; source code]. [ bib | DOI | .pdf ]

Saeid Rastegar, Rui Araújo, Jérôme Mendes, Tiago Matias, and Alireza Emami. Self-adaptive takagi-sugeno model identification methodology for industrial control processes. In Proc. of the The 40th Annual Conference of the IEEE Industrial Electronics Society (IECON 2014), pages 281--287, Dallas, TX, USA, October 29 - November 1 2014. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes, Rui Araújo, Tiago Matias, Ricardo Seco, and Carlos Belchior. Evolutionary learning of a fuzzy controller for industrial processes. In Proc. of the The 40th Annual Conference of the IEEE Industrial Electronics Society (IECON 2014), pages 139--145, Dallas, TX, USA, October 29 - November 1 2014. IEEE. [ bib | DOI | .pdf ]

Tiago Matias, Francisco Souza, Rui Araújo, Saeid Rastegar, and Jérôme Mendes. Adaptive identification and predictive control using an improved on-line sequential extreme learning machine. In Proc. of the The 40th Annual Conference of the IEEE Industrial Electronics Society (IECON 2014), pages 58--64, Dallas, TX, USA, October 29 - November 1 2014. IEEE. [ bib | DOI | .pdf ]

2013

Jérôme Mendes, Rui Araújo, and Francisco Souza. Adaptive fuzzy identification and predictive control for industrial processes. Expert Systems with Applications, 40(17):6964--6975, December 2013. [ bib | DOI | .pdf ]

Francisco A. A. Souza, Rui Araújo, Tiago Matias, and Jérôme Mendes. A multilayer-perceptron based method for variable selection in soft sensor design. Journal of Process Control, 23(10):1371--1378, November 2013. [ bib | DOI | .pdf ]

Symone Soares, Carlos Henggeler Antunes, and Rui Araújo. Comparison of a genetic algorithm and simulated annealing for automatic neural network ensemble development. Neurocomputing, 121:498--511, December 2013. [Boston Housing data set] [Friedman Artificial Domain data set] [both datasets]. [ bib | DOI | .pdf ]

Saeid Rastegar and Rui Araújo. A robust algorithm for a class of optimal control problems subject to regional stability constraints and disturbances. Measurement, 46(6):1773--1780, July 2013. [ bib | DOI | .pdf ]

Morad Danishvar, Ali Mousavi, Pedro Sousa, and Rui Araújo. Event-clustering for real-time data modeling. In Proc. 9th Annual IEEE International Conference on Automation Science and Engineering (CASE 2013), pages 362--367, Madison, WI, USA, August 17-21 2013. IEEE. [ bib | DOI | .pdf ]

Tiago Matias, Rui Araújo, Carlos Henggeler Antunes, and Dulce Gabriel. Genetically optimized extreme learning machine. In Proc. 18th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2013), pages 1--8, Cagliari, Italy, September 10-13 2013. IEEE. [ bib | DOI | .pdf ]

Luís Osório, Jérôme Mendes, Rui Araújo, and Tiago Matias. A comparison of adaptive pid methodologies controlling a dc motor with a varying load. In Proc. 18th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2013), pages 1--8, Cagliari, Italy, September 10-13 2013. IEEE. [ bib | DOI | .pdf ]

Tiago Matias, Dulce Gabriel, Francisco Souza, Rui Araújo, and J.Costa Pereira. Fault detection and replacement of a temperature sensor in a cement rotary kiln. In Proc. 18th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2013), pages 1--8, Cagliari, Italy, September 10-13 2013. IEEE. [ bib | DOI | .pdf ]

Dulce Gabriel, Tiago Matias, J.Costa Pereira, and Rui Araújo. Predicting gas emissions in a cement kiln plant using hard and soft modeling strategies. In Proc. 18th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2013), pages 1--8, Cagliari, Italy, September 10-13 2013. IEEE. [ bib | DOI | .pdf ]

2012

Jérôme Mendes, Francisco Souza, Rui Araújo, and Nuno Gonçalves. Genetic fuzzy system for data-driven soft sensors design. Applied Soft Computing, 12(10):3237--3245, October 2012. [Box-Jenkins gas furnace process data] [Box-Jenkins gas furnace process data, local copy]. [ bib | DOI | .pdf ]

Carlos Alberto Coelho Belchior, Rui Alexandre Matos Araújo, and Jorge Afonso Cardoso Landeck. Dissolved oxygen control of the activated sludge wastewater treatment process using stable adaptive fuzzy control. Computers & Chemical Engineering, 37:152--162, 10 February 2012. [ bib | DOI | .pdf ]

Francisco Souza and Rui Araújo. An online variable selection method using recursive least squares. In Proc. 17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2012), Kraków, Poland, September 17-21 2012. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes, Samuel Pinto, Rui Araújo, and Francisco Souza. Evolutionary fuzzy models for nonlinear identification. In Proc. 17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2012), Kraków, Poland, September 17-21 2012. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes and Rui Araújo. Fuzzy model predictive control for nonlinear processes. In Proc. 17th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2012), Kraków, Poland, September 17-21 2012. IEEE. [ bib | DOI | .pdf ]

Symone G. Soares, Carlos H. Antunes, and Rui Araújo. A genetic algorithm for designing neural network ensembles. In Proc. Genetic and Evolutionary Computation Conference (GECCO 2012), a recombination of the 21st International Conference on Genetic Algorithms (ICGA), and the 17th Annual Genetic Programming Conference (GP), pages 681--688, Philadelphia, USA, July 07-11 2012. ACM. [Boston Housing data set] [Friedman Artificial Domain data set] [both datasets]. [ bib | DOI | .pdf ]

2011

S. G. Soares, T. B. Takáo, A. F. da Rocha, R. A. de M. Araújo, and T. M. G. de A. Barbosa. Building distributed soft sensors. International Journal of Computer Information Systems and Industrial Management Applications (IJCISIMA), 3:202--209, 2011. [ bib | .pdf ]

Jérôme Mendes, Rui Araújo, Pedro Sousa, Filipe Apóstolo, and Luís Alves. An architecture for adaptive fuzzy control in industrial environments. Computers in Industry, 62(3):364--373, April 2011. [ bib | DOI | .pdf ]

O. Ludwig, C. Premebida, U. Nunes, and R. Araújo. Evaluation of boosting-svm and srm-svm cascade classifiers in laser and vision-based pedestrian detection. In Proc. 14th International IEEE Conference on Intelligent Transportation Systems (ITSC 2011), pages 1--8, Washington DC, USA, October 5-7 2011. IEEE. [ bib | DOI | .pdf ]

Symone Soares, Rui Araújo, Pedro Sousa, and Francisco Souza. Design and application of soft sensor using ensemble methods. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--8, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Francisco Souza, Tiago Matias, and Rui Araújo. Co-evolutionary genetic multilayer perceptron for feature selection and model design. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--7, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Francisco Souza and Rui Araújo. Variable and time-lag selection using empirical data. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--8, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes, Nuno Sousa, and Rui Araújo. Adaptive predictive control with recurrent fuzzy neural network for industrial processes. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--8, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes, Ricardo Seco, and Rui Araújo. Automatic extraction of the fuzzy control system for industrial processes. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--8, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes and Rui Araújo. Stable indirect adaptive predictive fuzzy control for industrial processes. In Proc. 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2011), pages 1--8, Toulouse, France, September 5-9 2011. IEEE. [ bib | DOI | .pdf ]

Ricardo Maia, Marco Silva, Rui Araújo, and Urbano Nunes. Electric vehicle simulator for energy consumption studies in electrical mobility systems. In Proc. IEEE Forum on Integrated and Sustainable Transportation System (FISTS 2011), pages 228--233, Vienna, Austria, June 29 - July 1 2011. IEEE. [ bib | DOI | .pdf ]

2010

Aníbal T. de Almeida, Carlos Patrão, Paula Fonseca, Rui Araújo, and Urbano Nunes, editors. SELINA - Standby and Off-Mode Energy Losses In New Appliances Measured in Shops. Institute of Systems and Robotics - University of Coimbra (ISR-UC), November 2010. Book ISBN: 978-972-8822-21-7. [ bib ]

Symone Gomes Soares, Adson Ferreira da Rocha, Talles Marcelo G. de A. Barbosa, and Rui Alexandre de Matos Araújo. Embedding a neural network into wsn furniture. In Proc. 10th IEEE International Conference on Hybrid Systems (HIS 2010), pages 219--222, Atlanta, USA, August 23-25 2010. IEEE. [ bib | DOI | .pdf ]

Francisco Souza, Rui Araújo, Symone Soares, and Jérôme Mendes. Variable selection based on mutual information for soft sensors applications. In Proc. 9th Portuguese Conference on Automatic Control (CONTROLO 2010), Coimbra, Portugal, September 8-10 2010. [ bib | .pdf ]

Jérôme Mendes, Rui Araújo, Pedro Sousa, Filipe Apóstolo, and Luís Alves. Fuzzy control architecture for industrial systems. In Proc. 9th Portuguese Conference on Automatic Control (CONTROLO 2010), Coimbra, Portugal, September 8-10 2010. [ bib | .pdf ]

Jérôme Mendes and Rui Araújo. Adaptive fuzzy model-based predictive control: a lyapunov approach. In Proc. 9th Portuguese Conference on Automatic Control (CONTROLO 2010), Coimbra, Portugal, September 8-10 2010. [ bib | .pdf ]

Carlos Alberto Belchior, Rui Araújo, and Jorge Landeck. Adaptive fuzzy control of the dissolved oxygen concentration in an activated sludge process. In Proc. 15th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2010), Bilbao, Spain, September 13-16 2010. IEEE. [ bib | DOI | .pdf ]

Francisco Souza, Pedro Santos, and Rui Araújo. Variable and delay selection using neural networks and mutual information for data-driven soft sensors. In Proc. 15th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2010), Bilbao, Spain, September 13-16 2010. IEEE. [ bib | DOI | .pdf ]

Jérôme Mendes, Rui Araújo, and Francisco Souza. Adaptive fuzzy generalized predictive control based on discrete-time t-s fuzzy model. In Proc. 15th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2010), Bilbao, Spain, September 13-16 2010. IEEE. [ bib | DOI | .pdf ]

Symone Soares and Rui Araújo. Design and application of soft sensor in industrial processes using small datasets, November 22-28 2010. National Science and Technology Week, Faculdade de Ciências e Tecnologia, Universidade de Coimbra. [ bib | .pdf ]

Jérôme Mendes and Rui Araújo. Adaptive fuzzy generalized predictive control based on discrete-time t-s fuzzy model for industrial processes, November 22-28 2010. National Science and Technology Week, Faculdade de Ciências e Tecnologia, Universidade de Coimbra. [ bib | .pdf ]

Filipe Apóstolo, Pedro Sousa, and Rui Araújo. Milling control cru 2 - intelligent control instalation. Technical Report (performed in the framework of the SInCACI R&D project de I&D in partnership between FCTUC and Acontrol), Research, Development, and Innovation Division (Acontrol), Coimbra, October 2010. (in Portuguese). [ bib ]

2009

Oswaldo Ludwig Junior, Urbano Nunes, Rui Araújo, Leizer Schnitman, and Herman Augusto Lepikson. Applications of information theory, genetic algorithms, and neural models to predict oil flow. Communications in Nonlinear Science and Numerical Simulation, 14(7):2870--2885, July 2009. [ bib | DOI | .pdf ]

Rui Cortesão, Brian Zenowich, Rui Araújo, and William Townsend. Robotic comanipulation with active impedance control. In Proc. ASME/AFM 2009 World Conference on Innovative Virtual Reality (WINVR 2009), pages 129--135, Chalon-sur-Saône, France, February 25-26 2009. ASME. [ bib | DOI | .pdf ]

Luís Alves, Pedro Sousa, and Rui Araújo. Industrial field bus interchange products: Solutions and market. Technical Report SInCACI 03, Departamento de Engenharia Electrotécnica e de Computadores, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, September 2009. [ bib ]

Francisco Souza and Rui Araújo. Soft sensors - overview and state of art. Technical Report SInCACI 02, Departamento de Engenharia Electrotécnica e de Computadores, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, September 2009. [ bib ]

Jérôme Mendes and Rui Araújo. Intelligent systems and applications. Technical Report SInCACI 01, Departamento de Engenharia Electrotécnica e de Computadores, Faculdade de Ciências e Tecnologia, Universidade de Coimbra, Coimbra, September 2009. [ bib ]

2008

Rui Araújo, Urbano Nunes, Luciano Oliveira, Pedro Sousa, and Paulo Peixoto. Support vector machines and features for environment perception in mobile robotics. In Lakhmi C. Jain, Mika Sato-Ilic, Maria Virvou, George A. Tsihrintzis, Valentina Emilia Balas, and Canicious Abeynayake, editors, Computational Intelligence Paradigms: Innovative Applications, volume SCI 137 of Studies in Computational Intelligence, pages 219--250. Springer-Verlag, Berlin Heidelberg, Germany, 2008. [ bib | DOI | .pdf ]

Oswaldo Ludwig Junior, Urbano Nunes, Rui Araújo, Leizer Schnitman, and Herman Augusto Lepikson. Applications of entropy and neural models to predict oil flow. In Proc. 2nd Conference on Nonlinear Science and Complexity (NSC 2008), pages 719--725, Vila Real, Portugal, July 21-23 2008. [ bib | .pdf ]

Oswaldo Ludwig Junior Urbano Nunes and Rui Araújo. Comparison study of redundant sensor fusion in autonomous vehicle navigation. In Proc. 8th Portuguese Conference on Automatic Control (CONTROLO 2008), pages 719--725, Vila Real, Portugal, July 21-23 2008. [ bib | .pdf ]

Jorge Almeida and Rui Araújo. Tracking multiple moving objects in a dynamic environment for autonomous navigation. In Proc. 10th IEEE Int. Workshop on Advanced Motion Control (AMC 2008), pages 21--26, Trento, Italy, March 26-28 2008. IEEE. [ bib | DOI | .pdf ]

2007

Pedro Sousa, Rui Araújo, Urbano Nunes, Luís Alves, and Ana C. Lopes. Real-time architecture for mobile assistant robots. In Proc. IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2007), pages 965--972, Patras, Greece, September 25-28 2007. IEEE. [ bib | DOI | .pdf ]

Pedro Sousa, Rui Araújo, and Urbano Nunes. Real-time labeling of places using support vector machines. In Proc. IEEE International Symposium on Industrial Electronics (ISIE 2007), pages 2022--2027, Vigo, Spain, June 4-7 2007. IEEE. [ bib | DOI | .pdf ]

2006

Rui Araújo. Prune-able fuzzy art neural architecture for robot map learning and navigation in dynamic environments. IEEE Transactions On Neural Networks, 17(5):1235--1249, September 2006. (Experiment movies are available here). [ bib | DOI | .pdf ]

Jorge Costa, Filipe Dias, and Rui Araújo. Simultaneous localization and map building by integrating a cache of features. In Proc. 11th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2006), pages 1036--1043, Prague, Czech Republic, September 20-22 2006. IEEE. [ bib | DOI | .pdf ]

2005

António Almeida, Jorge Almeida, and Rui Araújo. Real-time tracking of multiple moving objects using particle filters and probabilistic data association. AUTOMATIKA: Journal for Control, Measurement, Electronics, Computing and Communications, 46(1-2):39--48, 2005. (Article resulting from the selection for publication of the conference ISIE 2005 article. Selection performed by the Program Committee). [ bib | .pdf ]

Jorge Almeida, António Almeida, and Rui Araújo. Real-time tracking using particle filters and sample-based joint probabilistic data association filters. Robótica: Automação, Controlo, Instrumentação, 60(3rd Quarter):10--16, 2005. (Article resulting from the selection of the Robótica conference article. Selection performed by the Scientific Committee.). [ bib | .pdf ]

Jorge Almeida, António Almeida, and Rui Araújo. Real-time tracking using particle filters and sample-based joint probabilistic data association filters. In Proc. of the 5th National Robotics Festival (ROBÓTICA 2005), pages 1--8, Coimbra, Portugal, April 29 2005. [ bib | .pdf ]

Jorge Almeida, António Almeida, and Rui Araújo. Tracking multiple moving objects for mobile robotics navigation. In Proc. 11th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA 2005), pages 203--210, Catania, Italy, September 19-22 2005. IEEE. (Received one of the two Best Paper Awards of the conference: the Fumio Harashima Best Paper Award em Emerging Technology). [ bib | DOI | .pdf ]

António Surrécio, Urbano Nunes, and Rui Araújo. Fusion of odometry with magnetic sensors using kalman filters and augmented system models for mobile robot navigation. In Proc. IEEE International Symposium on Industrial Electronics (ISIE 2005), pages 1551--1556, Dubrovnik, Croatia, June 20-23 2005. IEEE. [ bib | DOI | .pdf ]

António Almeida, Jorge Almeida, and Rui Araújo. Real-time tracking of moving objects using particle filters. In Proc. IEEE International Symposium on Industrial Electronics (ISIE 2005), pages 1327--1332, Dubrovnik, Croatia, June 20-23 2005. IEEE. [ bib | DOI | .pdf ]

2003

Urbano Nunes, José Alberto Fonseca, Luís Almeida, Rui Araújo, and Rodrigo Maia. Using distributed systems in real-time control of autonomous vehicles. ROBOTICA, 21(3):271--281, May-June 2003. [ bib | DOI | .pdf ]

Sérgio Santos, José Eduardo Faria, Fernando Soares, Rui Araújo, and Urbano Nunes. Tracking of multi-obstacles with laser range data for autonomous vehicles. In Proc. of the 3rd National Robotics Festival (ROBÓTICA 2003), pages 59--65, Lisboa, Portugal, May 9 2003. [ bib | .pdf ]

Rui Araújo, Gonçalo Gouveia, and Nuno Santos. Learning self-organizing maps for navigation in dynamic worlds. In Proc. IEEE International Conference on Robotics and Automation (ICRA 2003), pages 1312--1317, Taipei, Taiwan, September 14-19 2003. IEEE. [ bib | DOI | .pdf ]

2002

Rui Araújo and Urbano Nunes. Adaptive-resolution map building approach for robot navigation in dynamic environments. Machine Intelligence & Robotic Control (MIROC), 4(2):61--70, June 2002. [ bib | .pdf ]

Rui Araújo, Urbano Nunes, J.Luís Cruz, and Aníbal T. de Almeida. Self teaching and exploratory task-learning methods in unknown environments and applications in robotic skills. In Cornelius T. Leondes, editor, Expert Systems, volume 6 of International Series in Engineering, Technology and Applied Science, pages 1897--1923. Academic Press, San Diego, CA, USA, 2002. [ bib | .pdf ]

Rui Araújo, Gonçalo Gouveia, and Nuno Santos. Mobile robot localization using a fuzzy art world model. In Proc. IEEE 28th International Conference on Industrial Electronics, Control and Instrumentation (IECON 2002), pages 2409--2414, Sevilla, Spain, November 5-8 2002. IEEE. [ bib | DOI | .pdf ]

Rui Araújo, Gonçalo Gouveia, and Aníbal T. de Almeida. Learning variable-resolution maps for navigation in dynamic worlds. In Proc. IEEE 28th International Conference on Industrial Electronics, Control and Instrumentation (IECON 2002), pages 2403--2408, Sevilla, Spain, November 5-8 2002. IEEE. [ bib | DOI | .pdf ]

2001

Gabriel Pires, Urbano Nunes, Rui Araújo, and João Coimbra. Development of the robchair assistive navigation system. Robótica: Automação, Controlo, Instrumentação, 43(2nd Quarter):25--43, 2001. [ bib | .pdf ]

Rui Araújo, David Lourenço, and Aníbal T. de Almeida. Learning multiresolution maps in dynamic worlds. In Proc. IEEE International Conference on Advanced Robotics (ICAR2001), pages 425--430, Budapest, Hungary, August 22-25 2001. IEEE. [ bib | .pdf ]

Rui Araújo, David Lourenço, and Gil Ferreira. Integrating laser and infrared sensors for learning dynamic self-organizing world maps. In Proc. IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI2001), pages 293--298, Baden-Baden, Germany, August 20-22 2001. IEEE. [ bib | DOI | .pdf ]

2000

Urbano Nunes, Rui Araújo, and Lino Marques. Towards intelligent machines: Theories, technologies and experiments. Journal of Systems Analysis, Modelling and Simulation, 38(2):157--173, August 2000. [ bib | .pdf ]

Rui Araújo and Aníbal T. de Almeida. Learning both a world model and navigation paths in an unknown environment. International Journal of Intelligent Automation and Soft Computing, 6(2):159--170, 2000. [ bib | .pdf ]

1999

Rui Araújo and Aníbal T. de Almeida. Learning sensor-based navigation of a real mobile robot in unknown worlds. IEEE Transactions On Systems, Man, and Cybernetics--Part B: Cybernetics, 29-B(2):164--178, April 1999. [ bib | DOI | .pdf ]

1998

Rui Araújo and Aníbal T. de Almeida. Reducing motion inaccuracies on a mobile robot. Journal of Intelligent and Robotic Systems, 21(3):197--219, March 1998. [ bib | DOI | .pdf ]

Rui Araújo, Urbano Nunes, and Lino Marques. Towards intelligent machines: Theory, technology, and experiments. In Spyros G. Tzafestas, editor, Trends in System Analysis and Control: Methods & Applications (`[Proc. of] IMACS/IFAC/IEEE Third European Robotics, Intelligent Systems & Control Conference (EURISCON'98)'), volume SCI 137, pages 3--14, and Abstracts Book, p. 27. IMACS/IFAC/IEEE, Athens, Greece, 1998. [ bib | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Connectionist reinforcement learning of robot control skills. In Daniel Dubois, editor, Computing Antecipatory Systems: CASYS -- First International Conference, volume 437 of AIP Conference Proceedings, pages 364--373 (and Abstract Book, pp. III.10--III.12; Liege, Belgium, August 11--15, 1997). AIP - The American Institute of Physics, Woodbury, New York, 1998. [ bib | DOI | .pdf ]

Rui Araújo and A.T. de Almeida. Exploration-based path-learning by a mobile robot on an unknown world. In Alicia Casals and Aníbal T. de Almeida, editors, Experimental Robotics V: The Fifth International Symposium, Barcelona, Catalonia, June 15-18, 1997, volume 232 of Lecture Notes in Control and Information Sciences, pages 647--658. Springer-Verlag, London, England, 1998. (Also appears at the Prep. Fifth International Symposium On Experimental Robotics (ISER'97), pp. 551-562, Barcelona, Spain, June 15-18, 1997). [ bib | DOI | .pdf ]

Gabriel Pires, Rui Araújo, and Urbano Nunes. Fuzzy-based navigation system of a powered wheelchair. In Proc. Fifteenth National Conference On Artificial Intelligence (AAAI-98), Integrating Artificial Intelligence and Assistive Technology Workshop, pages 55--60, Madison, Wiscosin, USA, July 26-30 1998. [ bib | .pdf ]

Rui Araújo, , and Aníbal T. de Almeida. Building geometric certainty maps with application to the navigation of a mobile robot. In Proc. IEEE 24th International Conference Industrial Electronics, Control and Instrumentation (IECON'98), pages 1186--1191, Aachen, Germany, August 31 - September 4 1998. IEEE. [ bib | DOI | .pdf ]

Gabriel Pires, Rui Araújo, Urbano Nunes, and Aníbal T. de Almeida. Robchair: A powered wheelchair using a behaviour-based navigation. In Proc. IEEE International Workshop on Advanced Motion Control (AMC'98), pages 536--541, Coimbra, Portugal, June 29-July 1 1998. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and Aníbal T. de Almeida. Integrating a geometric-primitive map into a multiresolution motion planning approach. In Proc. IEEE International Workshop on Advanced Motion Control (AMC'98), pages 629--634, Coimbra, Portugal, June 29-July 1 1998. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and Aníbal T. de Almeida. Fuzzy art based approach for real-time map building. In Proc. IEEE International Workshop on Advanced Motion Control (AMC'98), pages 623--628, Coimbra, Portugal, June 29-July 1 1998. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and Aníbal T. de Almeida. Map building using fuzzy art, and learning to navigate a mobile robot on an unknown world. In Proc. IEEE International Conference on Robotics and Automation (ICRA'98), pages 293--298, Leuven, Belgium, May 16-21 1998. IEEE. [ bib | DOI | .pdf ]

1997

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Self-learning of robot control skills. In Achim Sydow, editor, 15th IMACS World Congress 1997 on Scientific Computation, Modelling and Applied Mathematics (IMACS-WC'97), volume 5 of Systems Engineering, pages pp. 281--286 (and Abstracts Book, p. 589). W&T - Wissenschaft & Technik Verlag, Berlin, Germany, August 24-29 1997. [ bib | .pdf ]

R. Cortesão, U. Nunes, R. Araújo, and A.T. de Almeida. Modelling and communicating in teleoperation environments. In Achim Sydow, editor, 15th IMACS World Congress 1997 on Scientific Computation, Modelling and Applied Mathematics (IMACS-WC'97), volume 5 of Systems Engineering, pages 293--298 (Abstracts Book, p. 591). W&T - Wissenschaft & Technik Verlag, Berlin, Germany, August 24-29 1997. [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. Mobile robot motion-planning with learning. In Achim Sydow, editor, 15th IMACS World Congress 1997 on Scientific Computation, Modelling and Applied Mathematics (IMACS-WC'97), volume 5 of Systems Engineering, pages 331--336 (and Abstracts Book, p. 597). W&T - Wissenschaft & Technik Verlag, Berlin, Germany, August 24-29 1997. [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. Exploration of an unknown environment by a mobile robot. In Luis M.Camarinha Matos, editor, Re-engineering for Sustainable Industrial Production, pages 141--150. Chapman & Hall, London, England, 1997. (Proc. OE/IFIP/IEEE International Conference on Integrated and Sustainable Industrial Production, Lisbon, Portugal, May 14-16 1997). [ bib | .pdf ]

R. Cortesão, R. Araújo, U. Nunes, and A.T. de Almeida. Building a teleoperation environment. In A.E. Ruano and P.J. Fleming, editors, Algorithms and Architectures for Real-Time Control 1997: A Proceedings volume from the IFAC Workshop, Vilamoura, Portugal, 9-11 April 1997, pages 173--178. Pergamon - Elsevier Science, Oxford, England, 1997. (Also appears at Preprints 4th IFAC Workshop on Algorithms and Architectures for Real-Time Control (AARTC'97), pp. 199-204, Vilamoura, Portugal, April 9-11, 1997). [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. Minimising the effects of control-space quantization on mobile robot motion. In A.E. Ruano and P.J. Fleming, editors, Algorithms and Architectures for Real-Time Control 1997: A Proceedings volume from the IFAC Workshop, Vilamoura, Portugal, 9-11 April 1997, pages 209--214. Pergamon - Elsevier Science, Oxford, England, 1997. (Also appears at Preprints 4th IFAC Workshop on Algorithms and Architectures for Real-Time Control (AARTC'97), pp. 411-416, Vilamoura, Portugal, April 9-11, 1997). [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. Mobile robot path learning on an unknown environment. In A.E. Ruano and P.J. Fleming, editors, Algorithms and Architectures for Real-Time Control 1997: A Proceedings volume from the IFAC Workshop, Vilamoura, Portugal, 9-11 April 1997, pages 185--190. Pergamon - Elsevier Science, Oxford, England, 1997. (Also appears at Preprints 4th IFAC Workshop on Algorithms and Architectures for Real-Time Control (AARTC'97), pp. 211-216, Vilamoura, Portugal, April 9-11, 1997). [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. Reducing motion innacuracies due to actuation-system quantisation-errors on a mobile robot. In Proc. IEEE International Conference on Intelligent Engineering Systems (INES'97), pages 339--344, Budapest, Hungary, September 15-17 1997. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and A.T. de Almeida. Mobile robot path-learning to separate goals on an unknown world. In Proc. IEEE International Conference on Intelligent Engineering Systems (INES'97), pages 265--270, Budapest, Hungary, September 15-17 1997. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and Aníbal T. de Almeida. Sensor-based learning of environment model and path planning with a nomad 200 mobile robot. In Proc. IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS'97), pages 539--544, Grenoble, France, September 8-13 1997. IEEE. [ bib | DOI | .pdf ]

Rui Araújo and A.T. de Almeida. Reducing position errors arising from control-space quantisation on a mobile robot. In Proc. IEEE International Symposium on Industrial Electronics (ISIE'97), pages 785--790, Guimarães, Portugal, July 7-11 1997. [ bib | DOI | .pdf ]

Rui Araújo and A.T. de Almeida. Path planning-by-learning with a nomad 200 mobile robot. In Proc. IEEE International Symposium on Industrial Electronics (ISIE'97), pages 779--784, Guimarães, Portugal, July 7-11 1997. [ bib | DOI | .pdf ]

Rui Araújo and A.T. de Almeida. Decreasing the effects of actuation-system quantisation-errors on a khepera mobile robot. In Proc. 5as Jornadas Hispano-Lusas de Ingeniería Eléctrica (JHLIE'97), pages 1705--1712, Salamanca, Spain, July 3-5 1997. [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. World exploration and path learning with a khepera mobile robot. In Proc. 5as Jornadas Hispano-Lusas de Ingeniería Eléctrica (JHLIE'97), pages 1713--1720, Salamanca, Spain, July 3-5 1997. [ bib | .pdf ]

Rui Araújo and A.T. de Almeida. World learning and simultaneous path planning with a mobile robot. In Proc. 9th Portuguese Conference on Pattern Recognition (RecPad'97), pages 51--58, Coimbra, Portugal, March 20-21 1997. [ bib | .pdf ]

1996

Rui Araújo, Urbano Nunes, and A.T. de Almeida. 3d surface-tracking with a robot manipulator. Journal of Intelligent and Robotic Systems, 15(4):401--417, April 1996. [ bib | DOI | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. A fuzzy learning robot force controller. In François Pierrot Mohammad Jamshidi, Madjid Fathi, editor, Soft Computing with Industrial Applications: Recent Trends in Research and Development, volume 5 of Proceedings of the World Automation Congress, pages 19--24. TSI Press, Albuquerque, NM, USA, 1996. (Conference article Proc. World Automation Conference (WAC'96), International Symposium on Intelligent Automation and Control (ISIAC'96), pp. 19-24, Montepellier, France, 27-30 May, 1996). [ bib | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Application of a reinforcement learning fuzzy control system in robotics. In Proc. The 5th UK Mechatronics Forum International Conference (mecatronics'96), with The 3rd International Conference on Mechatronics and Machine Vision in Practice (M2Vip'96), pages 2--39--2--44, Guimarães, Portugal, September 18-20 1996. [ bib | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Robot learning of a contour-tracking operation. In Proc. IMACS/IEEE Multiconference on Computacional Engineering in Systems Applications (CESA'96), Symposium on Robotics and Cybernetics, pages 688--693, Lille, France, July 9-12 1996. [ bib | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Fuzzy-based reinforcement learning force of a robot control skill. In Proc. IEEE International Symposium on Industrial Electronics (ISIE'96), pages 453--458, Warsaw, Poland, June 17-20 1996. [ bib | DOI | .pdf ]

1995

Urbano Nunes, Rui Araújo, and A.T. de Almeida. Adaptive control of a robot manipulator: An experimental study. In Proc. 3rd International Symposium on Intelligent Robotic Systems (SIRS'95), pages 221--230, Pisa, Italy, July 10-14 1995. [ bib | .pdf ]

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Alignment with surfaces using a puma 560 robot. In Proc. 5th Jornadas Nacionais de Projecto, Planeamento e Produção Assistidos por Computador, pages 113--120, Guimarães, Portugal, 30 May - 1 June 1995. [ bib | .pdf ]

1994

Rui Araújo, Urbano Nunes, and A.T. de Almeida. Robot 3d force-based surface-tracking. In Proc. IEEE 20th International Conference on Industrial Electronics, Control and Instrumentation (IECON'94), pages 788--793, Bologna, Italy, September 5-9 1994. IEEE. [ bib | DOI | .pdf ]

1993

Pedro Faia, Urbano Nunes, Rui Araújo, and A.T. de Almeida. Arquitectura hierárquica para controlo de uma célula multisensorial. In Actas das 4as Jornadas Nacionais de Projecto, Planeamento e Produção Assistidos por Computador, pages 329--336, Ordem dos Engenheiros, Lisboa, Portugal, 17-19 de Maio 1993. [ bib | .pdf ]

Urbano Nunes, Rui Araújo, Pedro Faia, and A.T. de Almeida. Controlo de movimentos finos de um braço de robot puma 560. In Actas das 4as Jornadas Nacionais de Projecto, Planeamento e Produção Assistidos por Computador, pages 321--328, Ordem dos Engenheiros, Lisboa, Portugal, 17-19 de Maio 1993. [ bib | .pdf ]

Pedro Faia, Urbano Nunes, Rui Araújo, and A.T. de Almeida. Distributed architecture for control and sensor integration of a robotic cell. In Actas das 3as Jornadas Hispano-Lusas de Ingenieria Electrica, pages 1713--1722, Barcelona, Spain, September 23-25 1993. (in Portuguese). [ bib | .pdf ]

Urbano Nunes, Rui Araújo, and A.T. de Almeida. Application of an adaptive self-tuning method in task-space position manipulator control. In Actas das 3as Jornadas Hispano-Lusas de Ingenieria Electrica, pages 1723--1733, Barcelona, Spain, September 23-25 1993. [ bib | .pdf ]

Urbano Nunes, Rui Araújo, and A.T. de Almeida. Robust indirect adaptive-control method for task-space hybrid control of a puma 560. In Proc. IASTED International Conference Robotics and Manufacturing, pages 164--167, Oxford, England, September 23-25 1993. IASTED. [ bib | .pdf ]

Urbano Nunes, Rui Araújo, and A.T. de Almeida. Application of a robust indirect adaptive-control method in task-space hybrid manipulator control. In Proc. IEEE 19th International Conference Industrial Electronics, Control and Instrumentation (IECON'93), pages 1842--1847, Lahaina, Maui, Hawaii, USA, November 15-19 1993. IEEE. [ bib | DOI | .pdf ]

1992

Urbano Nunes, Pedro Faia, Rui Araújo, Daniel Castro, and A.T. de Almeida. On the integration of robot end-effector sensors: Control and modelling issues. In Proc. IEEE International Workshop on Emerging Technologies and Factory Automation (ETFA'92), pages 451--457, Melbourne, Australia, August 12-14 1992. IEEE. [ bib | DOI | .pdf ]

Urbano Nunes, Pedro Faia, Rui Araújo, and A.T. de Almeida. Hierarchical architecture for multisensor robot cell operation. In Proc. IEEE International Symposium on Intelligent Control (ISIC'92), pages 416--422, Glasgow, Scotland, August 11-13 1992. IEEE. [ bib | DOI | .pdf ]

1991

Urbano Nunes, A.T.Almeida, Pedro Faia, and Rui Araújo. Integrating force, tactile and proximity sensing for a flexible robotic system through a modular design. In S.G. Tzafesta, editor, Engineering Systems with Intelligence -- Concepts, Tools and Applications, pages 247--255. Kluwer Academic Publishers, The Netherlands, 1991. (Conference article: The European Robotics and International Systems Conference (EURISCON'91), Greece, June 1991.). [ bib | DOI | .pdf ]

Urbano Nunes, Pedro Faia, Rui Araújo, and A.T. Almeida. Integration of proximity information on a robotic assembly cell. In Proc. Portuguese Conference on Pattern Recognition (RecPad'91), Aveiro, Portugal, 1991. (in Portuguese). [ bib | .pdf ]

U.Nunes, P.Faia, R.Araújo, and A.T.Almeida. Development and control issues in contact and proximity sensing for a robotic system. In Proc. IEEE International Workshop on Intelligent Robots and Systems (IROS'91), pages 1357--1362, Osaka, Japan, November 3-5 1991. IEEE. [ bib | DOI | .pdf ]

Urbano Nunes, Joaquim Delgado, Rui Araújo, and A.T. de Almeida. Evaluation of the state of the art and the current trends in the use of tactile sensors in robotic manipulation, March 1991. ESPRIT 5673 Exploratory Action, Systems and Automation Laboratory, Electrical Engineering Department, University of Coimbra. [ bib | .pdf ]

1989

Rui Araújo. Tactile sensors, November 1989. Technical Report (in Portuguese). Departament of Electrical Engineering, Faculty of Sciences and Technology, University of Coimbra. [ bib | .pdf ]