Semi-Supervised Learning Based Ensemble Classifier for Stream Data
XU Wen-Hua 1, QIN Zheng 1, 2, CHANG Yang 2
1.Department of Computer Science and Technology,School of Information Science and Technology,Tsinghua University,Beijing 100084 2.School of Software,School of Information Science and Technology,Tsinghua University,Beijing 100084
Abstract：Stream data classification algorithms are mainly based on supervised learning strategy, and they need massive labeled data for training. These approaches are unpractical due to the high cost of acquiring labeled data in a real streaming environment. A semi-supervised learning based ensemble classifier (SEClass) is presented for stream data classification. SEClass utilizes both a small number of labeled data and a great number of unlabeled data to train an ensemble classifier, and unlabeled instances are classified using the majority voting strategy. The experimental results show that the accuracy of SEClass is 5.33% higher in average than that of the state-of-the-art supervised method using the same number of labeled data for training. And SEClass is suitable for high-dimensional high-speed massive stream data classification.
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2012, Vol. 25 
