Learning Multiple Related Tasks Using Latent Independent Component Analysis

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Learning Multiple Related Tasks Using Latent Independent Component Analysis (2005)

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by Jian Zhang , Jian Zhangý , Yiming Yang , Zoubin Ghahramani , Yiming Yangý

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53 - 5 self

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@MISC{Zhang05learningmultiple,
    author = {Jian Zhang and Jian Zhangý and Yiming Yang and Zoubin Ghahramani and Yiming Yangý},
    title = {Learning Multiple Related Tasks Using Latent Independent Component Analysis},
    year = {2005}
}

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Abstract

We propose a probabilistic model based on Independent Component Analysis for learning multiple related tasks. In our model the task parameters are assumed to be generated from independent sources which account for the relatedness of the tasks. We use Laplace distributions to model hidden sources which makes it possible to identify the hidden, independent components instead of just modeling correlations. Furthermore, our model enjoys a sparsity property which makes it both parsimonious and robust. We also propose efficient algorithms for both empirical Bayes method and point estimation. Our experimental results on two multi-label text classification data sets show that the proposed approach is promising.

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