Search for dissertations about: "Aristides Gionis"

Found 3 swedish dissertations containing the words Aristides Gionis.

  2. 1. Diversified Retrieval of Spatial Data with Context

    Author : Georgios Kalamatianos; Georgios J Fakas; Aristides Gionis; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Proportionality; Diversity; Keyword Search; Spatial Data; Ranking; Computer Science; Datavetenskap;

    Abstract : The abundance and ubiquity of spatial datasets necessitates their effective and efficient retrieval. For instance, on the web, there are datasets with GIS objects or POIs (e.g. Spatialhadoop datasets), datasets with geo-tagged photographs (e. READ MORE

  4. 2. Modelling and Analysis of Probabilistic Networks

    Author : Amin Kaveh; Matteo Magnani; Christian Rohner; Aristides Gionis; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Probabilistic Networks; Local Measures; Modelling; Clustering; Computer Science; Datavetenskap;

    Abstract : As empirical data collection and inference is often an imperfect process, and many systems can be represented as networks, it is important to develop modelling and analysis methods for imperfect network data. The main focus of this dissertation is the probabilistic network model G = (V, E, p) in which each edge is associated with an independent existence probability. READ MORE

  5. 3. Optimization beyond a single submodular function : Submodular optimization for ranking, decision trees and diversity

    Author : Guangyi Zhang; Aristides Gionis; Danupon Na Nongkai; Parinya Chalermsook; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Submodular optimization; Approximation algorithms; Ranking; Decision trees; Diversity; Datalogi; Computer Science;

    Abstract : Submodular functions characterize mathematically the ubiquitous ``diminishing-returns'’ property. They are widely used to describe core subjects in numerous applications, including economic utility, redundancy in information, spread of influence in social networks, and more. READ MORE