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On power law distributions in large-scale taxonomies
Abstract : In many of the large-scale physical and social complex systems phenomena fat-tailed distributions occur, for which different generating mechanisms have been proposed. In this paper, we study models of generating power law distributions in the evolution of large-scale taxonomies such as Open Directory Project, which consist of websites assigned to one of tens of thousands of categories. The categories in such taxonomies are arranged in tree or DAG structured configurations having parent-child relations among them. We first quantitatively analyse the formation process of such taxonomies, which leads to power law distribution as the stationary distributions. In the context of designing classifiers for large-scale taxonomies, which automatically assign unseen documents to leaf-level categories, we highlight how the fat-tailed nature of these distributions can be leveraged to analytically study the space complexity of such clas-sifiers. Empirical evaluation of the space complexity on publicly available datasets demonstrates the applicability of our approach.
Keywords :
Large-scale taxonomies
Power law distributions
Cited literature [32 references]
https://hal.archives-ouvertes.fr/hal-01120164
Contributor : Massih-Reza Amini Connect in order to contact the contributor
Submitted on : Tuesday, February 24, 2015 - 9:48:41 PM
Last modification on : Thursday, October 21, 2021 - 3:48:32 AM
Long-term archiving on: : Wednesday, May 27, 2015 - 10:52:27 AM
Contributor : Massih-Reza Amini Connect in order to contact the contributor
Submitted on : Tuesday, February 24, 2015 - 9:48:41 PM
Last modification on : Thursday, October 21, 2021 - 3:48:32 AM
Long-term archiving on: : Wednesday, May 27, 2015 - 10:52:27 AM
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