Membros > Colaboradores

Rui Valadas

Morada Institucional

Instituto Superior Técnico (IST)
Av. Rovisco Pais 1
1049-001 LISBOA


Telefone: | Email: rui.valadas@tecnico.ulisboa.pt

Posição

Professor Catedrático, Instituto Superior Técnico, Universidade de Lisboa

Área

Estatística e Processos Estocásticos


Publicações

Artigos em Revistas Internacionais

Oliveira, M. Rosário; Vilela, M. ; Pacheco, António; Valadas, Rui; Salvador, P.  (2018) Extracting Information from Interval Data Using Symbolic Principal Component Analysis. Austrian Journal of Statistics, (in press).
Pascoal, C.; Oliveira, M. Rosário; Pacheco, António; Valadas, Rui (2017) Theoretical evaluation of feature selection methods based on mutual information. Neurocomputing: 226, 168-181.
Nogueira, A.; Salvador, P.; Valadas, Rui; Pacheco, António (2011) Markovian modelling of Internet traffic. Lecture Notes in Computer Science: 5233, 98-124.
Nogueira, Antonio; Salvador, Paulo; Valadas, Rui; Pacheco, António (2010) Modeling Self-Similar Traffic Over Multiple Time Scales Based on Hierarchical Markovian and L-System Models. Computer Communications: 33, S3-S10.
Oliveira, M. Rosário; Pacheco, António; Pascoal, C.; Valadas, Rui; Salvador, P. (2009) On the dependencies between Internet flow characteristics. Lecture Notes in Computer Science: 5464, 68-80.
Oliveira, M. Rosário; Valadas, Rui; Pacheco, António; Salvador, P. (2007) Cluster analysis of Internet users based on hourly traffic utilization. IEICE Transactions on Communications: E90-B(7), 1594-1607.
Salvador, P.; Nogueira, A.; Valadas, Rui; Pacheco, António (2004) Multi-time-scale traffic modeling using Markovian and L-systems models. Lecture Notes in Computer Science: 3262, 297-306.
Salvador, P..; Pacheco, António; Valadas, Rui (2004) Modeling IP traffic: joint characterization of packet arrivals and packet arrivals using BMAPs. Computer Networks: 44(3), 335-352.
Nogueira, A.; Salvador, P.; Valadas, Rui; Pacheco, António (2004) Fitting self-similar traffic by a superposition of MMPPs modeling the distribution at multiple time scales. IEICE Transactions on Communications: E87-B(3), 678-688.
Nogueira, A.; Salvador, P.; Valadas, Rui; Pacheco, António (2003) Modeling network traffic with multifractal behavior. Telecommunication Systems: 24(2), 339-362.
Nogueira, A.; Salvador, P.; Valadas, Rui; Pacheco, António (2003) Modeling self-similar traffic through Markov modulated Poisson processes over multiple time scales. Lecture Notes in Computer Science: 2720, 550-560.
Salvador, P.; Valadas, Rui; Pacheco, António (2003) Multiscale fitting procedure using Markov modulated Poisson processes. Telecommunication Systems: 23(1), 123-148.

Artigos ou Capítulos em Livros Editados

Pascoal, C.; Oliveira, M. Rosário; Pacheco, António; Valadas, Rui (2010) Detection of Outliers Using Robust Principal Component Analysis: a Simulation Study. Advances in Intelligent and Soft Computing: 77 , 499-507.

Comunicações em Actas de Conferência

Oliveira, M. Rosário; Vilela, M. ; Pacheco, António; Valadas, Rui; Salvador, P. (2016) Extracting Information from Interval Data Using Symbolic Principal Component Analysis. Computer Science Analysis and Modeling. Theoretical and Applied Stochastics. Proceedings of the XI International Conference on Computer Data Analysis & Modeling (CDAM-2016), Minsk, September 6-10, 45-52.
Oliveira, M. Rosário; João Neves ; Valadas, Rui; Paulo Salvador  (2015) Do we need a perfect ground-truth for benchmarking Internet traffic classifiers?. 2015 Proceedings IEEE INFOCOM, 2452–2460.
Sara Faria Leal ; Oliveira, M. Rosário; Valadas, Rui (2015) Anomaly detection of Internet traffic using robust feature selection based on kernel density estimation. European Conference on Networks and Communications (EuCNC’2015), 482–486.
Oliveira, M. Rosário; Valadas, Rui; Pietrzyk, M.; Collange, D. (2014) Stability of Flow Features for the Identification of Internet Applications. Proceedings of 16th International Telecommunications Network Strategy and Planning Symposium (Networks), September 17-19, Funchal, Portugal, 1 - 6 .
Pascoal, C.; Oliveira, M. Rosário; Valadas, Rui; Filzmoser, P.; Salvador, P.; Pacheco, António (2012) Robust feature selection and robust PCA for internet traffic anomaly detection. Proceedings of IEEE, INFOCOM : 25-30 March, Orlando, FL, 1755–1763.
Oliveira, M. Rosário; Sertório, L.; Valadas, Rui; Pacheco, António (2006) Decomposition of network flows with applications to cluster analysis of Internet access traffic.. Procs. Second Conference on Next Generation Internet Networks – Traffic Engineering: Valencia, Spain, April 3-5.
Nogueira, A. Nogueira; Oliveira, M. Rosário; Salvador, P. ; Valadas, Rui; Pacheco, António (2005) Using Neural Networks to Classify Internet Users. In Procs. AICT/SAPIR/ELETE 2005, 183-188.
Nogueira, A.; Oliveira, M. Rosário; Salvador, P.; Valadas, Rui; Pacheco, António (2005) Classification of Internet users using Discriminant Analysis and Neural Networks. In Procs. of the First Conference on Next Generation Internet Networks - Traffic Engineering: Rome, April 18-20.
Nogueira, A. ; Salvador, P.; Valadas, Rui; Pacheco, António (2003) A hierarchical approach based on MMPPs for modeling self-similar traffic over multiple time scales. Procs. Int. Working Conference on Performance Modeling and Evaluation of Heterogeneuous Networks - HET-NETs, Ilkley, West Yorkshire: UK, July 21-23, 1: 37/1-37/13.
Oliveira, M. Rosário; Valadas, Rui; Pacheco, António; Salvador, P. (2003) Cluster analysis of internet users based on hourly traffic utilization. Procs. Int. Working Conference on Performance Modeling and Evaluation of Heterogeneuous Networks - HET-NETs, Ilkley, West Yorkshire, UK: July 21-23, 1: 56/1-56/14.
Nogueira, A.; Salvador, P. ; Valadas, Rui; Pacheco, António (2003) Markovian approach for modeling IP traffic behavior on several time scales. In Procs. Conference on Performance and Control of Next-Generation Communications Networks, Orlando, Florida: September 9-10, 29-40.