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arXiv 2402.08401cs.LGcs.AIcs.SI
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LOSS-GAT:用于假新闻检测的标签传播与单类半监督图注意力网络

LOSS-GAT: Label Propagation and One-Class Semi-Supervised Graph Attention Network for Fake News Detection

Amirkabir University of Technology (Tehran Polytechnic)(阿米尔卡比尔理工大学(德黑兰理工大学))

Batool Lakzaei, Mostafa Haghir Chehreghani, Alireza Bagheri

AI总结:

本文提出了一种用于假新闻检测的半监督单类图注意力网络 LOSS-GAT,通过两步标签传播和结构增强技术,在仅使用少量标注假新闻的情况下,性能显著提升甚至超越二分类标注模型。

摘要:

在社交网络广泛普及的时代,假新闻的快速传播已成为一种重大威胁,对人们生活的各个方面造成了有害后果。机器学习和深度学习方法已被广泛用于识别假新闻。然而,识别假新闻的一个重大挑战是标注新闻数据集的可用性有限。因此,仅使用来自目标类别少量标注数据的单类学习(OCL)方法,可能是解决这一挑战的合适途径。另一方面,将数据表示为图能够获取多样化的内容和结构信息,并且图上的标签传播方法在预测节点标签方面非常有效。在本文中,我们采用基于图的模型进行数据表示,并引入了一种用于假新闻检测的半监督单类方法,称为 LOSS-GAT。首先,我们采用两步标签传播算法,利用图神经网络(GNN)作为初始分类器,将新闻分为两组:目标类(假新闻)和非目标类(真实新闻)。随后,我们使用结构增强技术来优化图结构。最后,我们使用一种通过聚合函数在节点局部邻域内引入随机性的 GNN 来预测所有未标注数据的最终标签。我们在五个常见数据集上评估了所提出的方法,并将结果与一组基线模型进行了比较,包括 OCL 模型和二分类标注模型。结果表明,LOSS-GAT 取得了超过 10% 的显著提升,且其优势在于仅使用有限的标注假新闻数据。值得注意的是,LOSS-GAT 的表现甚至优于二分类标注模型。

英文摘要:

In the era of widespread social networks, the rapid dissemination of fake news has emerged as a significant threat, inflicting detrimental consequences across various dimensions of people's lives. Machine learning and deep learning approaches have been extensively employed for identifying fake news. However, a significant challenge in identifying fake news is the limited availability of labeled news datasets. Therefore, the One-Class Learning (OCL) approach, utilizing only a small set of labeled data from the interest class, can be a suitable approach to address this challenge. On the other hand, representing data as a graph enables access to diverse content and structural information, and label propagation methods on graphs can be effective in predicting node labels. In this paper, we adopt a graph-based model for data representation and introduce a semi-supervised and one-class approach for fake news detection, called LOSS-GAT. Initially, we employ a two-step label propagation algorithm, utilizing Graph Neural Networks (GNNs) as an initial classifier to categorize news into two groups: interest (fake) and non-interest (real). Subsequently, we enhance the graph structure using structural augmentation techniques. Ultimately, we predict the final labels for all unlabeled data using a GNN that induces randomness within the local neighborhood of nodes through the aggregation function. We evaluate our proposed method on five common datasets and compare the results against a set of baseline models, including both OCL and binary labeled models. The results demonstrate that LOSS-GAT achieves a notable improvement, surpassing 10%, with the advantage of utilizing only a limited set of labeled fake news. Noteworthy, LOSS-GAT even outperforms binary labeled models.

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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