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Co-training Semi-supervised Learning for Single-Target Regression in Data Streams Using AMRules

Title
Co-training Semi-supervised Learning for Single-Target Regression in Data Streams Using AMRules
Type
Article in International Conference Proceedings Book
Year
2017
Authors
Ricardo Sousa
(Author)
FCUP
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João Gama
(Author)
FEP
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Authenticus ID: P-00M-YHX
Abstract (EN): In a single-target regression context, some important systems based on data streaming produce huge quantities of unlabeled data (without output value), of which label assignment may be impossible, time consuming or expensive. Semi-supervised methods, that include the co-training approach, were proposed to use the input information of the unlabeled examples in the improvement of models and predictions. In the literature, the co-training methods are essentially applied to classification and operate in batch mode. Due to these facts, this work proposes a co-training online algorithm for single-target regression to perform model improvement with unlabeled data. This work is also the first-step for the development of online multi-target regressor that create models for multiple outputs simultaneously. The experimental framework compared the performance of this method, when it rejects unalabeled data and when it uses unlabeled data with different parametrization in the training. The results suggest that the co-training method regressor predicts better when a portion of unlabeled examples is used. However, the prediction improvements are relatively small. © Springer International Publishing AG 2017.
Language: English
Type (Professor's evaluation): Scientific
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