CUED Publications database

Safe semi-supervised learning of sum-product networks

Trapp, M and Madl, T and Peharz, R and Pernkopf, F and Trappl, R (2017) Safe semi-supervised learning of sum-product networks. Uncertainty in Artificial Intelligence - Proceedings of the 33rd Conference, UAI 2017.

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In several domains obtaining class annotations is expensive while at the same time unlabelled data are abundant. While most semi-supervised approaches enforce restrictive assumptions on the data distribution, recent work has managed to learn semi-supervised models in a nonrestrictive regime. However, so far such approaches have only been proposed for linear models. In this work, we introduce semisupervised parameter learning for Sum-Product Networks (SPNs). SPNs are deep probabilistic models admitting inference in linear time in number of network edges. Our approach has several advantages, as it (1) allows generative and discriminative semi-supervised learning, (2) guarantees that adding unlabelled data can increase, but not degrade, the performance (safe), and (3) is computationally efficient and does not enforce restrictive assumptions on the data distribution. We show on a variety of data sets that safe semi-supervised learning with SPNs is competitive compared to state-of-theart and can lead to a better generative and discriminative objective value than a purely supervised approach.

Item Type: Article
Uncontrolled Keywords: stat.ML stat.ML cs.LG
Divisions: Div F > Computational and Biological Learning
Depositing User: Cron Job
Date Deposited: 18 Oct 2017 20:08
Last Modified: 10 Dec 2020 07:27