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A Machine Learning Approach for Subjectivity Classification Based on Positional and Discourse Features

机译:基于位置和话语特征的机器学习主观分类方法

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In recent years, several machine learning methods have been proposed to detect subjective (opinionated) expressions within on-line documents. This task is important in many Opinion Mining and Sentiment Analysis applications. However, the opinion extraction process is often done with rough content-based features. In this paper, we study the role of structural features to guide sentence-level subjectivity classification. More specifically, we combine classical n-grams features with novel features defined from positional information and from the discourse structure of the sentences. Our experiments show that these new features are beneficial in the classification of subjective sentences.
机译:近年来,已经提出了几种机器学习方法来检测在线文档中的主观(有主意的)表达。在许多意见挖掘和情感分析应用程序中,此任务很重要。但是,意见提取过程通常使用基于内容的粗略功能来完成。在本文中,我们研究了结构特征在指导句子级主观性分类中的作用。更具体地说,我们将经典的n-gram特征与从位置信息和句子的语篇结构定义的新颖特征相结合。我们的实验表明,这些新功能有助于主观句子的分类。

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