Journal of Computer Applications ›› 2026, Vol. 46 ›› Issue (6): 1756-1766.DOI: 10.11772/j.issn.1001-9081.2025060744

• Artificial intelligence • Previous Articles    

Social bot detection framework fusing multi-scale wavelet enhancement and self-supervised learning

Yu CHEN1, Shuaikang QI1(), Liwei XU2(), Haotian ZHU1   

  1. 1.College of Computer and Control Engineering,Northeast Forestry University,Harbin Heilongjiang 150040,China
    2.School of Management Science and Engineering,Dongbei University of Finance and Economics,Dalin Liaoning 116025,China
  • Received:2025-07-08 Revised:2025-09-10 Accepted:2025-09-18 Online:2025-10-16 Published:2026-06-10
  • Contact: Shuaikang QI, Liwei XU
  • About author:CHEN Yu, born in 1975, Ph. D., associate professor. His research interests include machine learning, natural language processing, computational biology, image processing.
    ZHU Haotian, born in 1999, M. S. candidate. His research interests include social network detection.
    First author contact:QI Shuaikang, born in 1996, M. S. candidate. His research interests include social network.
    XU Liwei, born in 1989, Ph. D., associate professor. Her research interests include human-computer interaction, machine learning.
  • Supported by:
    National Natural Science Foundation of China(72301060);Liaoning Provincial Social Security Research Project(LNSHAQ2025B016);Basic Research Project of Educational Department of Liaoning Province(JYTMS20230666)

融合多尺度小波增强与自监督学习的社交机器人检测框架

陈宇1, 戚帅康1(), 许莉薇2(), 朱浩天1   

  1. 1.东北林业大学 计算机与控制工程学院,哈尔滨 150040
    2.东北财经大学 管理科学与工程学院,辽宁 大连 116025
  • 通讯作者: 戚帅康,许莉薇
  • 作者简介:陈宇(1975—),男,黑龙江哈尔滨人,副教授,博士,CCF会员,主要研究方向:机器学习、自然语言处理、计算生物学、图像处理
    朱浩天(1999—),男,山东滕州人,硕士研究生,主要研究方向:社交网络检测。
    第一联系人:戚帅康(1996—),男,河南驻马店人,硕士研究生,主要研究方向:社交网络
    许莉薇(1989—),女,辽宁大连人,副教授,博士,主要研究方向:人机交互、机器学习
  • 基金资助:
    国家自然科学基金资助项目(72301060);辽宁省社会安全研究项目(LNSHAQ2025B016);辽宁省教育厅基础科研项目(JYTMS20230666)

Abstract:

To address the limitations of the existing social bot detection methods in multimodal feature modeling, disguised behavior recognition, and generalization under weakly supervised scenarios, a social bot detection framework fusing multi-scale wavelet enhancement and self-supervised learning, named W2A-BotNet (Wavelet-to-Attention Bot Network), was proposed. In the framework, a unified three-channel representation of textual semantics, user attributes, and social relations was constructed to alleviate modality conflicts; a Multi-scale Attention Wavelet Neural Operator Block (MAWNOBlock) was designed to perform time-frequency decomposition of behavioral sequences, thereby capturing both periodic patterns and abrupt anomalies; a multi-source collaborative fusion mechanism was introduced to achieve dynamic semantic alignment through cross-modal interactions and gating; a self-supervised pretraining based on follower count distribution was incorporated to enhance feature representation under limited labeled data. Experimental results show that the accuracy of the W2A-BotNet is improved by 0.35, 4.86, and 2.21 percentage points respectively compared to the suboptimal methods on Cresci-15, Cresci-17, and TwiBot-20 datasets, respectively. It can be seen that W2A-BotNet enhances the identification of bot accounts on social platforms effectively and provides a generalized detection framework for social network security governance.

Key words: social bot detection, self-supervised learning, wavelet transformation, user representation learning, machine learning, neural network

摘要:

针对现有社交机器人检测方法多模态特征建模不足、伪装行为难以识别及弱监督场景下泛化性欠缺的问题,提出一种融合多尺度小波增强与自监督学习的社交机器人检测框架——W2A-BotNet (Wavelet-to-Attention Bot Network)。该框架对文本语义、用户属性和社交关系构建统一的三通道表示,以缓解模态冲突;设计多尺度注意力小波神经算子模块(MAWNOBlock)对行为序列进行时频分解,捕捉周期规律与突发异常;提出多源协同融合机制,通过跨模态交互与门控实现动态语义对齐;引入基于粉丝数分布的自监督预训练,在少量标注数据的条件下加强特征表征。实验结果表明,W2A-BotNet的准确率在Cresci-15、Cresci-17与TwiBot-20数据集上相较于次优方法分别提高了0.35、4.86和2.21个百分点。可见,W2A-BotNet可有效提升社交平台上对机器人账户的识别能力,为社交网络的安全治理提供了可推广的检测框架。

关键词: 社交机器人检测, 自监督学习, 小波变换, 用户表示学习, 机器学习, 神经网络

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