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arXiv 2304.08239cs.LGcs.CV
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RF-GNN:用于社交机器人检测的随机森林增强图神经网络

RF-GNN: Random Forest Boosted Graph Neural Network for Social Bot Detection

PLA Strategy Support Force Information Engineering University(中国人民解放军战略支援部队信息工程大学)

Shuhao Shi, Kai Qiao, Jie Yang, Baojie Song, Jian Chen, Bin Yan

AI总结:

本文提出RF-GNN方法,以图神经网络为基分类器构建随机森林,结合集成学习与GNN优势,通过子图采样、特征选择、边丢弃及FCN对齐聚合提升社交机器人检测的准确性和鲁棒性。

摘要:

社交媒体上大量机器人的存在导致了不利影响。尽管随机森林算法被广泛应用于机器人检测,并能显著提升弱分类器的性能,但它无法利用账户之间的交互关系。本文提出了一种用于社交机器人检测的随机森林增强图神经网络,称为RF-GNN,该方法采用图神经网络(GNN)作为基分类器来构建随机森林,有效结合了集成学习与GNN的优势,以提高模型的准确性和鲁棒性。具体而言,通过节点采样、特征选择和边丢弃构建不同的子图作为不同的训练集。然后,使用各种子图训练GNN基分类器,剩余特征用于训练全连接神经网络(FCN)。在每个分支中,GNN和FCN的输出被对齐。最后,聚合所有分支的输出以产生最终结果。此外,RF-GNN兼容多种广泛使用的用于节点分类的GNN。大量实验结果表明,所提出的方法相比其他最先进的方法获得了更好的性能。

英文摘要:

The presence of a large number of bots on social media leads to adverse effects. Although Random forest algorithm is widely used in bot detection and can significantly enhance the performance of weak classifiers, it cannot utilize the interaction between accounts. This paper proposes a Random Forest boosted Graph Neural Network for social bot detection, called RF-GNN, which employs graph neural networks (GNNs) as the base classifiers to construct a random forest, effectively combining the advantages of ensemble learning and GNNs to improve the accuracy and robustness of the model. Specifically, different subgraphs are constructed as different training sets through node sampling, feature selection, and edge dropout. Then, GNN base classifiers are trained using various subgraphs, and the remaining features are used for training Fully Connected Netural Network (FCN). The outputs of GNN and FCN are aligned in each branch. Finally, the outputs of all branches are aggregated to produce the final result. Moreover, RF-GNN is compatible with various widely-used GNNs for node classification. Extensive experimental results demonstrate that the proposed method obtains better performance than other state-of-the-art methods.

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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