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联合标记特定特征和相关性信息的多标记学习方法

Joint Label-Specific Features and Correlation Information for Multi-Label Learning

  • 摘要: 多标记学习用于解决每个实例与一组分类标记相关联的问题。在多标记学习中,不同的标记可能具有彼此区分的固有特征,并且相关性信息在提升多标记学习算法的性能中显示出较强的优势。本文中,我们提出了一种新颖的多标记学习方法,该方法在学习过程中同时考虑了对标记特定特征和相关性信息的学习。首先,我们基于线性回归模型为每个标记学习一个稀疏的权重参数向量,然后根据相应的权重参数向量提取标记的特定特征。另外,我们直接将标记相关性用于约束标记的输出,而不是标记的对应参数向量上,因为它与标记特定特征的学习相冲突。具体来说,对于任何两个相关标记,其对应的模型应具有相似的输出而不是相似的参数向量。最后,我们还通过稀疏重构来利用了样本间的相关性信息。在12个基准数据集上的实验结果表明我们所提出的方法与现有的方法相比具有更好的性能。我们提出的方法的性能排在第一的情况占66.7%,并且在所有评价指标下的平均排名都是最好的。

     

    Abstract: Multi-label learning deals with the problem where each instance is associated with a set of class labels. In multilabel learning, different labels may have their own inherent characteristics for distinguishing each other, and the correlation information has shown promising strength in improving multi-label learning. In this study, we propose a novel multilabel learning method by simultaneously taking into account both the learning of label-specific features and the correlation information during the learning process. Firstly, we learn a sparse weight parameter vector for each label based on the linear regression model, and the label-specific features can be extracted according to the corresponding weight parameters. Secondly, we constrain label correlations directly on the output of labels, not on the corresponding parameter vectors which conflicts with the label-specific feature learning. Specifically, for any two related labels, their corresponding models should have similar outputs rather than similar parameter vectors. Thirdly, we also exploit the sample correlations through sparse reconstruction. The experimental results on 12 benchmark datasets show that the proposed method performs better than the existing methods. The proposed method ranks in the 1st place at 66.7% case and achieves optimal average rank in terms of all evaluation measures.

     

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