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arXiv 2002.01065cs.AIcs.CL
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基于不确定性加权因果图的假新闻检测

Fake News Detection by means of Uncertainty Weighted Causal Graphs

Universidad Autónoma de Madrid(马德里自治大学);Escuela Técnica Superior de Ingeniería ICAI, Universidad Pontificia Comillas(科米利亚斯主教大学ICAI高等工程技术学院)

Eduardo C. Garrido-Merchán, Cristina Puente, Rafael Palacios

摘要:

社会正在经历信息消费的变化,因为社交网络等新的信息渠道让人们分享不一定值得信任的新闻。有时,这些信息来源故意制造虚假新闻,目的可疑,这些信息的消费者将其分享给其他认为信息准确的用户。这种信息的传播是我们社会中的一个问题,因为它会对人们对某些人物、团体或思想的看法产生负面影响。因此,期望设计一种系统,其能够检测信息并将其分类为假的,并且将信息源分类为值得信任或不值得信任。目前的系统实验困难执行此任务,因为它是复杂的设计一个自动程序,可以独立于上下文分类此信息。在这项工作中,我们提出了一种通过基于加权因果图的分类器来检测假新闻的机制。这些图是通过从文本中检索的因果关系构建的特定混合模型,并考虑因果关系的不确定性。我们利用这种表示来使用这个图的概率分布,并基于学习信息和新信息的熵和KL散度构建了一个假新闻分类器。我们认为,假新闻的问题是准确地解决了这个模型,因为它的混合性质之间的象征性和定量方法。我们描述了这种分类器的方法,并添加了经验证据的有用性,我们提出的方法的合成实验和一个真正的实验涉及肺癌的形式。

英文摘要:

Society is experimenting changes in information consumption, as new information channels such as social networks let people share news that do not necessarily be trust worthy. Sometimes, these sources of information produce fake news deliberately with doubtful purposes and the consumers of that information share it to other users thinking that the information is accurate. This transmission of information represents an issue in our society, as can influence negatively the opinion of people about certain figures, groups or ideas. Hence, it is desirable to design a system that is able to detect and classify information as fake and categorize a source of information as trust worthy or not. Current systems experiment difficulties performing this task, as it is complicated to design an automatic procedure that can classify this information independent on the context. In this work, we propose a mechanism to detect fake news through a classifier based on weighted causal graphs. These graphs are specific hybrid models that are built through causal relations retrieved from texts and consider the uncertainty of causal relations. We take advantage of this representation to use the probability distributions of this graph and built a fake news classifier based on the entropy and KL divergence of learned and new information. We believe that the problem of fake news is accurately tackled by this model due to its hybrid nature between a symbolic and quantitative methodology. We describe the methodology of this classifier and add empirical evidence of the usefulness of our proposed approach in the form of synthetic experiments and a real experiment involving lung cancer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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