Hessian-Regularized Co-Training for Social Activity Recognition

	Hessian-Regularized Co-Training for Social Activity Recognition
	Liu Weifeng; Li Yang; Lin Xu; Tao Dacheng; Wang Yanjiang
刊名	PLOS ONE
	2014
英文摘要	Co-training is a major multi-view learning paradigm that alternately trains two classifiers on two distinct views and maximizes the mutual agreement on the two-view unlabeled data. Traditional co-training algorithms usually train a learner on each view separately and then force the learners to be consistent across views. Although many co-trainings have been developed, it is quite possible that a learner will receive erroneous labels for unlabeled data when the other learner has only mediocre accuracy. This usually happens in the first rounds of co-training, when there are only a few labeled examples. As a result, co-training algorithms often have unstable performance. In this paper, Hessian-regularized co-training is proposed to overcome these limitations. Specifically, each Hessian is obtained from a particular view of examples; Hessian regularization is then integrated into the learner training process of each view by penalizing the regression function along the potential manifold. Hessian can properly exploit the local structure of the underlying data manifold. Hessian regularization significantly boosts the generalizability of a classifier, especially when there are a small number of labeled examples and a large number of unlabeled examples. To evaluate the proposed method, extensive experiments were conducted on the unstructured social activity attribute (USAA) dataset for social activity recognition. Our results demonstrate that the proposed method outperforms baseline methods, including the traditional co-training and LapCo algorithms.
收录类别	SCI
原文出处	http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0108474
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/5425]
专题	深圳先进技术研究院_集成所
作者单位	PLOS ONE
推荐引用方式 GB/T 7714	Liu Weifeng,Li Yang,Lin Xu,et al. Hessian-Regularized Co-Training for Social Activity Recognition[J]. PLOS ONE,2014.
APA	Liu Weifeng,Li Yang,Lin Xu,Tao Dacheng,&Wang Yanjiang.(2014).Hessian-Regularized Co-Training for Social Activity Recognition.PLOS ONE.
MLA	Liu Weifeng,et al."Hessian-Regularized Co-Training for Social Activity Recognition".PLOS ONE (2014).