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Browsing by Subject "Expert systems"

Now showing items 1-8 of 8

    • Application of Fuzzy Cognitive Maps to water demand prediction 

      Papageorgiou E.I., Poczeta K., Laspidou C. (2015)
      This article is focused on the issue of learning of Fuzzy Cognitive Maps designed to model and predict time series. The multi-step supervised-learning based-on-gradient methods as well as population-based learning, with ...

    • Creation of a remote sensing unmanned aerial system (UAS) for precision agriculture and related mapping applications 

      Stefanakis, D.; Hatzopoulos, J. N.; Margaris, N. S.; Danalatos, N. G. (2013)
      Our goal is to create a fully autonomous airborne remote sensing platform, for the production of various vegetation indices to determine growth, development, yield crop and provide considerable information in real time and ...

    • A free terrain model for trajectory k-anonymity 

      Gkoulalas-Divanis, A.; Verykios, V. S. (2008)
      This paper introduces a privacy model for location based services that utilizes collected movement data to identify parts of the user trajectories, where user privacy is at an elevated risk. To protect the privacy of the ...

    • Grid-file: Towards to a flash efficient multi-dimensional index 

      Fevgas A., Bozanis P. (2015)
      Spatial indexes are of great importance for multidimensional query processing. Traditional data structures have been optimized for magnetic disks in the storage layer. In the recent years flash solid disks are widely ...

    • Management of uncomplicated urinary tract infections using fuzzy cognitive maps 

      Papageorgiou, E. I.; Papadimitriou, C.; Karkanis, S. (2009)
      Urinary Tract Infection (UTI) is a bacterial infection that affects any part of the urinary tract. It can be classified as uncomplicated (patients with urinary tracts that are normal from both structural and functional ...

    • Positional data organization and compression in web inverted indexes 

      Akritidis, L.; Bozanis, P. (2012)
      To sustain the tremendous workloads they suffer on a daily basis, Web search engines employ highly compressed data structures known as inverted indexes. Previous works demonstrated that organizing the inverted lists of the ...

    • The problem of knowledge elicitation from the expert's point of view 

      Vrettaros, J.; Leros, A.; Hrissagis-Chrysagis, K.; Drigas, A. (2010)
      This chapter describes the development of an expert system by a knowledge engineer with pedagogical expertise. Specifically, the problem of knowledge elicitation from the expert's point of view is thoroughly presented as ...

    • The xbr+-tree: An efficient access method for points 

      Roumelis G., Vassilakopoulos M., Loukopoulos T., Corral A., Manolopoulos Y. (2015)
      Spatial indexes, such as those based on Quadtree, are important in spatial databases for efficient execution of queries involving spatial constraints. In this paper, we present improvements of the xBR-tree (a member of the ...