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(to be completed)

 


ThinkMind // International Journal On Advances in Networks and Services, volume 6, numbers 3 and 4, 2013 // View article netser_v6_n34_2013_11


Efficient and Accurate Label Propagation on Dynamic Graphs and Label Sets

Authors:
Michele Covell
Shumeet Baluja

Keywords: graph propagation, large-scale labeling, incremental connection-graph changes, stabilized bi-conjugate gradient descent, Gaussian elimination, topic discovery, web domains

Abstract:
Many web-based application areas must infer label distributions starting from a small set of sparse, noisy labels. Previous work has shown that graph-based propagation can be very effective at finding the best label distribution across nodes, starting from partial information and a weighted-connection graph. In their work on video recommendations, Baluja et al. showed high-quality results using Adsorption, a normalized propagation process. An important step in the original formulation of Adsorption was re-normalization of the label vectors associated with each node, between every propagation step. That interleaved normalization forced computation of all label distributions, in synchrony, in order to allow the normalization to be correctly determined. Interleaved normalization also prevented use of standard linear-algebra methods, like stabilized bi-conjugate gradient descent (BiCGStab) and Gaussian elimination. We show how to replace the interleaved normalization with a single pre-normalization, done once before the main propagation process starts, allowing use of selective label computation (label slicing) as well as large-matrix-solution methods. As a result, much larger graphs and label sets can be handled than in the original formulation and more accurate solutions can be found in fewer propagation steps. We further extend that work to handle graphs that change and expand over time. We report results from using pre-normalized Adsorption in topic labeling for web domains, using label slicing and BiCGStab. We also report results from using incremental updates on changing co-author network data. Finally, we discuss two options for handling mixed-sign (positive and negative) graphs and labels.

Pages: 246 to 259

Copyright: Copyright (c) to authors, 2013. Used with permission.

Publication date: December 31, 2013

Published in: journal

ISSN: 1942-2644

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