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Vellido Alcacena, Alfredo

Total activity: 189
Areas of expertise
Unsupervised Machine Learning, Data Visualization, Data Science, Biomedical Applications
h index
21
Professional category
Tenure-track 2 lecturers
Doctoral courses
DOCTOR
Research group
SOCO - Soft Computing
Department
Department of Computer Science
School
Barcelona School of Informatics (FIB)
E-mail
avellidocs.upc.edu
Contact details
UPC directory Open in new window
Orcid
0000-0002-9843-1911 Open in new window
Scopus Author ID
6602481203 Open in new window

Scientific and technological production

1 to 50 of 189 results
 
  • Making nonlinear manifold learning models interpretable: the manifold grand tour

     Lisboa, P.; Martin, J.; Vellido, A.
    Expert systems with applications
    Vol. 42, num. 22, p. 8982-8988
    DOI: 10.1016/j.eswa.2015.07.054
    Date of publication: 2015-12
    Journal article
  • Label noise in subtype discrimination of class C G protein-coupled receptors: A systematic approach to the analysis of classification errors  Open access

     Koenig, C.; Cardenas, M.; Giraldo, J.; Alquezar, R.; Vellido, A.
    BMC bioinformatics
    Vol. 16:314, p. 1-14
    DOI: 10.1186/s12859-015-0731-9
    Date of publication: 2015-09-29
    Journal article
    Access to the full text
  • Visual characterization of misclassified Class C GPCRs through Manifold-based machine learning methods  Open access

     Cárdenas, M.I.; Vellido, A.; König, C.; Alquezar, R.; Giraldo, J.
    Genomics and computational biology
    Vol. 1, num. 1, p. e19-
    DOI: 10.18547/gcb.2015.vol1.iss1.e19
    Date of publication: 2015-09-18
    Journal article
    Access to the full text
  • The extracellular N-terminal domain suffices to discriminate class C G Protein-Coupled Receptor subtypes from n-grams of their sequences  Open access

     König, C.; Alquezar, R.; Vellido, A.; Giraldo, J.
    IEEE International Joint Conference on Neural Networks
    p. 1-7
    DOI: 10.1109/IJCNN.2015.7280613
    Presentation's date: 2015-07-14
    Presentation of work at congresses
    Access to the full text
  • The influence of alignment-free sequence representations on the semi-supervised classification of class C G protein-coupled receptors  Open access

     Cruz, R.; Vellido, A.; Giraldo, J.
    Medical and biological engineering and computing
    Vol. 53, num. 2, p. 137-149
    DOI: 10.1007/s11517-014-1218-y
    Date of publication: 2015-02-01
    Journal article
    Access to the full text
  • A weighted Cramér’s V Index for the assessment of stability in the fuzzy clustering of class C G protein-coupled receptors

     Vellido, A.; Halka, C.; Nebot, M.
    International Work-Conference on Bioinformatics and Biomedical Engineering
    p. 536-547
    DOI: 10.1007/978-3-319-16483-0_52
    Presentation of work at congresses
  • Visualization and Interpretability in Probabilistic Dimensionality Reduction Models  Open access

     Tosi, A.
    Department of Computer Science, Universitat Politècnica de Catalunya
    Theses
  • Reducing the n-gram feature space of class C GPCRs to subtype-discriminating patterns  Open access

     König, C.; Alquezar, R.; Vellido, A.; Giraldo, J.
    Journal of integrative bioinformatics
    Vol. 11, num. 3, p. Paper 254-
    DOI: 10.2390/biecoll-jib-2014-254
    Date of publication: 2014-10-23
    Journal article
    Access to the full text
  • Automated classification of brain tumours from short echo time in vivo MRS data using Gaussian decomposition and Bayesian neural networks

     Arizmendi, C.; Sierra, D.A.; Vellido, A.; Romero, E.
    Expert systems with applications
    Vol. 41, num. 11, p. 5296-5307
    DOI: 10.1016/j.eswa.2014.02.031
    Date of publication: 2014-09
    Journal article
  • Finding class C GPCR subtype-discriminating n-grams through feature selection  Open access

     König, C.; Alquezar, R.; Vellido, A.; Giraldo, J.
    International Conference on Practical Applications of Computational Biology & Bioinformatics
    p. 89-96
    DOI: 10.1007/978-3-319-07581-5_11
    Presentation's date: 2014-06-05
    Presentation of work at congresses
    Access to the full text
  • A MAP approach for convex non-negative matrix factorization in the diagnosis of brain tumors

     Vilamala, A.; Belanche, Ll.; Vellido, A.
    International Workshop on Pattern Recognition in Neuroimaging
    p. 6858550-1-6858550-4
    DOI: 10.1109/PRNI.2014.6858550
    Presentation's date: 2014-06
    Presentation of work at congresses
  • Visual interpretation of class C GPCR subtype overlapping from the nonlinear mapping of transformed primary sequences

     Cárdenas, M.I.; Vellido, A.; Giraldo, J.
    IEEE-EMBS International Conferences on Biomedical and Health Informatics
    p. 764-767
    DOI: 10.1109/BHI.2014.6864476
    Presentation's date: 2014-06-01
    Presentation of work at congresses
  • Sepsis mortality prediction with the Quotient Basis Kernel

     Ribas, V.; Vellido, A.; Romero, E.; Ruiz-Rodríguez, Juan C.
    Artificial intelligence in medicine
    Vol. 61, num. 1, p. 45-52
    DOI: 10.1016/j.artmed.2014.03.004
    Date of publication: 2014-05-01
    Journal article
  • Continuous blood pressure assessment from a photoplethysmographic signal with Deep Belief Networks

     Ribas, V.; Wojdel, A.Anna Wojdel; Sáez de Tejada, A.; Ruiz-Rodríguez, Juan C.; Ruiz, A.; Nadal, M.; Romero, E.; Vellido, A.
    Experimental Biology
    Presentation's date: 2014-04-28
    Presentation of work at congresses
  • Misclassification of class C G-protein-coupled receptors as a label noise problem  Open access

     König, C.; Vellido, A.; Alquezar, R.; Giraldo, J.
    European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning
    p. 695-700
    Presentation's date: 2014-04-25
    Presentation of work at congresses
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  • Exploration of Customer Churn Routes Using Machine Learning Probabilistic Models  Open access

    Department of Computer Science, Universitat Politècnica de Catalunya
    Theses
  • Exploratory visualization of misclassified GPCRs from their transformed unaligned sequences using manifold learning techniques  Open access

     Cárdenas, M.I.; Vellido, A.; König, C.; Alquezar, R.; Giraldo, J.
    International Work-Conference on Bioinformatics and Biomedical Engineering
    p. 623-630
    Presentation's date: 2014-04
    Presentation of work at congresses
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  • Manifold learning visualization of metabotropic glutamate receptors  Open access

     Cárdenas, M.I.; Vellido, A.; Giraldo, J.
    International Conference of the Catalan Association for Artificial Intelligence
    p. 269-272
    DOI: 10.3233/978-1-61499-452-7-269
    Presentation of work at congresses
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  • Probability ridges and distortion flows: Visualizing multivariate time series using a variational Bayesian manifold learning method  Open access

     Tosi, A.; Olier, I.; Vellido, A.
    Workshop on Self-Organizing Maps
    p. 55-64
    DOI: 10.1007/978-3-319-07695-9_5
    Presentation's date: 2014
    Presentation of work at congresses
    Access to the full text
  • Local metric and graph based distance for probabilistic dimensionality reduction

     Tosi, A.; Vellido, A.
    International Conference on Pattern Recognition
    Presentation of work at congresses
  • Metrics for probabilistic geometries

     Tosi, A.; Hauberg, S.; Vellido, A.; Lawrence, N.
    Conference on Uncertainty in Artificial Intelligence
    p. 800-808
    Presentation's date: 2014
    Presentation of work at congresses
  • Probabilistic geometries as a tool for interpretability in dimensionality reduction models

     Tosi, A.; Vellido, A.
    Neural Information Processing Systems Conference
    Presentation of work at congresses
  • A novel semi-supervised methodology for extracting tumor type-specific MRS sources in human brain data

     Ortega, S.; Ruiz, H.; Vellido, A.; Olier, I.; Romero, E.; Julia, M.; Martin, J.; Jarman, I.; Arus, C.; Lisboa, P.
    PLoS one
    Vol. 8, num. 12, p. e83773-1-e83773-14
    DOI: 10.1371/journal.pone.0083773
    Date of publication: 2013-12-23
    Journal article
  • Discriminant convex non-negative matrix factorization for the classification of human brain tumours

     Vilamala, A.; Lisboa, P.; Ortega, S.; Vellido, A.
    Pattern recognition letters
    Vol. 34, num. 14, p. 1734-1747
    DOI: 10.1016/j.patrec.2013.05.023
    Date of publication: 2013-10-15
    Journal article
  • Cartogram-based data visualization using the growing hierarchical SOM

     Martin, A.; Vellido, A.
    Congrés Internacional de l’Associació Catalana d'Intel·ligència Artificial
    p. 249-252
    DOI: 10.3233/978-1-61499-320-9-249
    Presentation's date: 2013-10
    Presentation of work at congresses
  • SVM-based classification of class C GPCRs from alignment-free physicochemical transformations of their sequences  Open access

     König, C.; Cruz, R.; Alquezar, R.; Vellido, A.
    International Conference on Image Analysis and Processing
    p. 336-343
    DOI: 10.1007/978-3-642-41190-8_36
    Presentation's date: 2013-09-09
    Presentation of work at congresses
    Access to the full text
  • Cartogram visualization for nonlinear manifold learning models

     Vellido, A.; Garcia, D.; Nebot, M.
    Data mining and knowledge discovery
    Vol. 27, num. 1, p. 22-54
    DOI: 10.1007/s10618-012-0294-6
    Date of publication: 2013-07-01
    Journal article
  • Robust cartogram visualization of outliers in manifold learning  Open access

     Tosi, A.; Vellido, A.
    European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning
    p. 555-560
    Presentation's date: 2013-04-24
    Presentation of work at congresses
    Access to the full text
  • A Quotient Basis Kernel for the prediction of mortality in severe sepsis patients  Open access

     Ribas, V.; Romero, E.; Ruiz-Rodríguez, Juan C.; Vellido, A.
    European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning
    p. 379-384
    Presentation's date: 2013-04-24
    Presentation of work at congresses
    Access to the full text
  • Advances in semi-supervised alignment-free classification of G protein-coupled receptors  Open access

     Vellido, A.; Cruz, R.; Giraldo, J.
    International Work-Conference on Bioinformatics and Biomedical Engineering
    p. 759-766
    Presentation's date: 2013-03
    Presentation of work at congresses
    Access to the full text
  • Telecommunications customers churn monitoring using flow maps and cartogram visualization

     Garcia, D.; Nebot, M.; Vellido, A.
    International Conference on Computer Graphics Theory and Applications and International Conference on Information Visualization Theory and Applications
    p. 451-460
    Presentation's date: 2013-02
    Presentation of work at congresses
  • On the Intelligent Management of Sepsis in the Intensive Care Unit  Open access

    Department of Computer Science, Universitat Politècnica de Catalunya
    Theses
  • Visualizing pay-per-view television customers churn using cartograms and flow maps

     García, D.; Nebot, M.; Vellido, A.
    European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning
    p. 567-572
    Presentation of work at congresses
  • Convex non-negative matrix factorization for brain tumor delimitation from MRSI data  Open access

     Ortega, S.; Lisboa, P.; Vellido, A.; Simoes, R.V.; Pumarola, M.; Julià, M.; Arús, C.
    PLoS one
    Vol. 7, num. 10
    DOI: 10.1371/journal.pone.0047824
    Date of publication: 2012-10-23
    Journal article
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  • Unsupervised tumour area delimitation in glioblastoma multiforme using non-negative matrix factorisation of MRSI grids

     Ortega, S.; Lisboa, P.; Vellido, A.; Simoes, R.V.; Pumarola, M.; Julià, M.; Arús, C.
    Annual Scientific Meeting of the European Society for Magnetic Resonance in Medicine and Biology
    p. 303-
    DOI: 10.1007/s10334-012-0323-x
    Presentation's date: 2012-10-06
    Presentation of work at congresses
  • Robust discrimination of glioblastomas from metastatic brain tumors on the basis of single-voxel 1H MRS

     Vellido, A.; Romero, E.; Julià, M.; Majós, C.; Moreno, À.; Pujol, J.; Arús, C.
    NMR in biomedicine
    Vol. 25, num. 6, p. 819-828
    DOI: 10.1002/nbm.1797
    Date of publication: 2012-06
    Journal article
  • Kernel generative topographic mapping of protein sequences

     Cárdenas, M.I.; Vellido, A.; Olier, I.; Rovira, X.; Giraldo, J.
    Date of publication: 2012-06
    Book chapter
    Image
  • Intelligent management of sepsis in the intensive care unit

     Ribas, V.; Ruiz-Rodríguez, Juan C.; Vellido, A.
    Date of publication: 2012-06
    Book chapter
    Image
  • Preprocessing MRS information for classification of human brain tumours

     Arizmendi, C.; Vellido, A.; Romero, E.
    Date of publication: 2012-06
    Book chapter
    Image
  • Classification of human brain tumours from MRS data using Discrete Wavelet Transform and Bayesian Neural Networks

     Arizmendi, C.; Vellido, A.; Romero, E.
    Expert systems with applications
    Vol. 39, num. 5, p. 5223-5232
    DOI: 10.1016/j.eswa.2011.11.017
    Date of publication: 2012-04
    Journal article
  • Making machine learning models interpretable

     Vellido, A.; Martin, J.; Lisboa, P.
    European Symposium on Artificial Neural Networks
    p. 163-172
    Presentation's date: 2012-04
    Presentation of work at congresses
  • Cartogram representation of the batch-SOM magnification factor

     Tosi, A.; Vellido, A.
    European Symposium on Artificial Neural Networks
    p. 203-208
    Presentation's date: 2012-04
    Presentation of work at congresses
  • Non-negative matrix factorisation methods for the spectral decomposition of MRS data from human brain tumours

     Ortega, S.; Lisboa, P.; Vellido, A.; Julià, M.; Arús, C.
    BMC bioinformatics
    Vol. 13, num. 38, p. 1-20
    DOI: 10.1186/1471-2105-13-38
    Date of publication: 2012-03-08
    Journal article
  • Complementing kernel-based visualization of protein sequences with their phylogenetic tree

     Cárdenas, M.I.; Vellido, A.; Olier, I.; Rovira, X.; Giraldo, J.
    DOI: 10.1007/978-3-642-35686-5_8
    Date of publication: 2012
    Book chapter
    Image
  • On the use of graphical models to study ICU outcome prediction in septic patients treated with statins

     Ribas, V.; Caballero López, J.; Sáez de Tejada, A.; Ruiz-Rodríguez, Juan C.; Ruiz Sanmartín, A.; Rello, J.; Vellido, A.
    DOI: 10.1007/978-3-642-35686-5_8
    Date of publication: 2012
    Book chapter
    Image
  • Discovering hidden pathways in bioinformatics

     Lisboa, P.; Jarman, I.; Etchells, T.A.; Chambers, S.J.; Bacciu, D.; Whittaker, J.; Garibaldi, J.M.; Ortega, S.; Vellido, A.; Ellis, I.O.
    DOI: 10.1007/978-3-642-35686-5_8
    Date of publication: 2012
    Book chapter
    Image
  • Classifying malignant brain tumours from 1H-MRS data using Breadth Ensemble Learning  Open access

     Vilamala, A.; Belanche, Ll.; Vellido, A.
    International Conference on Neural Networks
    p. 1-8
    DOI: 10.1109/IJCNN.2012.6252756
    Presentation's date: 2012
    Presentation of work at congresses
    Access to the full text