Finding representative objects using link analysis ranking

  • Authors:
  • Panagiotis Papapetrou;Tatiana Chistiakova;Jaakko Hollmén;Vana Kalogeraki;Dimitrios Gunopulos

  • Affiliations:
  • Aalto University, Finland;Aalto University, Finland;Aalto University, Finland;Athens University of Economics and Business, Athens, Greece;University of Athens, Athens, Greece

  • Venue:
  • Proceedings of the 5th International Conference on PErvasive Technologies Related to Assistive Environments
  • Year:
  • 2012

Quantified Score

Hi-index 0.00

Visualization

Abstract

Link analysis ranking methods are widely used for summarizing the connectivity structure of large networks. We explore a weighted version of two common link analysis ranking algorithms, PageRank and HITS, and study their applicability to assistive environment data. Based on these methods, we propose a novel approach for identifying representative objects in large datasets, given their similarity matrix. The novelty of our approach is that it takes into account both the pair-wise similarities between the objects, as well as the origin and "evolution path" of these similarities within the dataset. The key step of our method is to define a complete graph, where each object is represented by a node and each edge in the graph is given a weight equal to the pairwise similarity value of the two adjacent nodes. Nodes with high ranking scores correspond to representative objects. Our experimental evaluation was performed on three data domains: american sign language, sensor data, and medical data.