Enviaments recents

  • Multisided patches 

    Pla García, Núria; Vigo Anglada, Marc; Cotrina Navau, Josep (2004-06)
    Report de recerca
    Accés obert
    We present a method to construct a patch of parametric surface of degree k + 1 that lls a n-sided hole, with n bigger than 2, and whose boundary coincides with a B-Spline, thus, the resulting patch can be easily connected ...
  • A Distributed and mobile component system based on the ambient calculus 

    Mylonakis Pascual, Nicolás; Orejas Valdés, Fernando (2004-06)
    Report de recerca
    Accés obert
    In this paper we present a new component concept equivalent to a previous one which is more appropiate for distributed applications. After that, we present the notion of component system and define a set of operations of ...
  • Developing competitive HMM PoS taggers using small training corpora 

    Padró Cirera, Montserrat; Padró, Lluís (2004-06)
    Report de recerca
    Accés obert
    This paper presents a study aiming to find out the best strategy to develop a fast and accurate HMM tagger when only a limited amount of training material is available. This is a crucial factor when dealing with languages ...
  • Kernels on structured domains 

    Valentín-Fernández Gallart, Luis (2004-06)
    Report de recerca
    Accés obert
    Kernel-based learning methods are primarily used with real-valued data. Yet many domains are made up of structured objects such as strings, trees or graphs. This work focuses on the design of kernels capable of coping ...
  • Determining the structural events that may violate an integrity constraint 

    Cabot, Jordi; Teniente López, Ernest (2004-07)
    Report de recerca
    Accés obert
    Any implementation of an information system must ensure that an operation is only applied if its execution does not lead to a violation of any of the integrity constraints defined in its conceptual schema. In this ...
  • The AlignmentSet toolkit 

    Lambert, Patrik (2004-06)
    Report de recerca
    Accés obert
    The Lingua-AlignmentSet distribution is a Perl Tools Library (and command-line utilities) to handle an Alignment Set, i.e. a set of sentences aligned at the word (or phrase) level. It provides methods to display the links, ...
  • Algoritmos genéticos en el problema de la solución deseada. Optimización de parámetros 

    Barreiro, E.; Joan Arinyo, Robert; Luzón, M.V. (2004-06)
    Report de recerca
    Accés obert
    En [Luzon01] se demuestra la viabilidad de aplicar un algoritmo genético básico al problema de la búsqueda de la solución deseada en los problemas de resolución de restricciones geométricas. En los experimentos ...
  • Generative topographic mapping as a constrained mixture of student t-distributions: theoretical developments 

    Vellido Alcacena, Alfredo (2004-09)
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    Accés obert
    The Generative Topographic Mapping (GTM: Bishop et al. 1998a), a non-linear latent variable model, was originally defined as constrained mixture of Gaussians. Gaussian mixture models are known to lack robustness in the ...
  • Smaller kernels for hitting set problems of constant arity 

    Nishimura, Naomi; Ragde, Prabhakar; Thilikos Touloupas, Dimitrios (2004-05)
    Report de recerca
    Accés obert
    We demonstrate a kernel of size O(k^2) for 3-HITTING SET when all subsets in the collection to be hit are of size at most three), giving a partial answer to an open question of Niedermeier by improving on the O(k^3) ...
  • Searching spatial sense in the ontological world: discovering spatial objects 

    Morocho Zurita, Villie; Pérez Vidal, Lluís; Saltor Soler, Félix Enrique (2004-05)
    Report de recerca
    Accés obert
    The search of semantic understanding in information systems has led us to take advantage from fields like Natural Language processing from the Artificial Intelligence. This is the case of ontologies which have been used ...

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