Recent Submissions

  • Transport analytics approaches to the dynamic origin-destination estimation problem 

    Ros Roca, Xavier; Montero Mercadé, Lídia; Barceló Bugeda, Jaime; Noëkel, Klaus; Gentile, Guido (2020-10)
    External research report
    Restricted access - author's decision
    Dynamic traffic models require dynamic inputs, and one of the main inputs are the Dynamic Origin-Destinations (OD) matrices describing the variability over time of the trip patterns across the network. The Dynamic OD Matrix ...
  • An approach to monitoring changes in deductive databases 

    Urpí Tubella, Antoni (1991-09)
    External research report
    Open Access
    We propose a method to monitor changes in deductive databases. The method augments a database with a set of transition and events rules, which explicity define the insertions, deletions and modifications induced by a ...
  • Bases de datos interoperables: la problemática del acceso integrado 

    Castellanos Vázquez Gil, M. Guadalupe; García Solaco, Manuel Alberto; Saltor, Félix; Urpí Tubella, Antoni (1989)
    External research report
    Open Access
    La búsqueda de mecanismos que permitan alcanzar la interoperabilidad de sistemas de información heterogéneos a través del intercambio de datos de manera cooperativa y respetando siempre la autonomía de los participantes ...
  • D'ingres a postgres: evolució de la implementació d'un SGBD relacional 

    Urpí Tubella, Antoni (1988)
    External research report
    Open Access
    This work describes the implementation of INGRES, one of the first relational data base management systems. The initial release of INGRES, created in Berkeley around 1976, developed to the actual POSTGRES. We study in ...