Abstract
The incompleteness of data samples in data streams always affects the performance of learning model. In order to learn data streams with missing values from features and a large amount of unlabeled data, this paper proposes a semi-supervised ensemble algorithm based on evolving fuzzy systems (EFS) named OSSEFS. Aiming at missing values, a fuzzy rule based online imputation strategy is designed to improve the data feature integrity. Aiming at unlabeled data, a new ensemble fuzzy system architecture is proposed to fully utilize both labeled and unlabeled data implicit information to predict data labels accurately. In addition, an online rule parameters optimization strategy is proposed to achieve adaptive adjustment of rule distribution. Thanks to the above strategies, OSSEFS can perform well in data environments containing missing values and unlabeled data. Comparative experimental results on multiple datasets show that OSSEFS outperforms the classical semi-supervised regression algorithms.
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