计算机科学 ›› 2025, Vol. 52 ›› Issue (7): 218-225.doi: 10.11896/jsjkx.240500124
郑诚, 杨楠
ZHENG Cheng, YANG Nan
摘要： 方面级情感分析的目标是识别句子中特定方面词的情感极性。近年来,许多工作都是利用句法依赖关系和自注意力机制分别获得句法知识和语义知识,并通过图卷积网络融合这两种信息更新节点的表示。然而句法依赖关系和自注意力机制都不是特定用于情感分析的工具,不能直接有效地捕获方面词的情感表达,而这一点正是方面级情感分析的关键之处。为了更准确地识别方面词的情感表达,构造了融合句法、语义和情感知识的网络。具体来说,利用句法依赖树中的句法知识构建句法图,并将外部情感知识库信息融合在句法图中。同时,采用自注意力机制获得句子中各单词的语义知识,并通过方面感知注意力机制使语义图关注与方面词相关的信息。此外,采用双向消息传播机制同时学习这两个图中的信息并更新节点表示。在3个基准数据集上的实验结果验证了所提模型的有效性。
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