基于方面-词性感知的方面级情感分析

doi:10.19678/j.issn.1000-3428.0067204

摘要/Abstract

摘要：

方面级情感分析是自然语言处理的研究热点之一，其任务目的是预测句子中给定方面的情感极性。目前已有研究大多忽略了方面词和特定词性单词在过滤情感极性相关上下文语义信息和理解上下文语法信息中的作用。为此，提出一种基于方面-词性感知的图卷积网络ASP_POSGCN。采用双向长短期记忆网络建模上下文和词性信息，经由门控机制筛选方面词相关上下文语义信息，再使用词性信息隐藏层状态进一步过滤；同时设计方面-词性感知矩阵算法，根据不同词性单词对方面词情感极性的贡献重构句子原始依存关系以获取重构依存句法图，将原始依存句法图和重构依存句法图应用于双通道图卷积网络和多图感知机制；最后，使用过滤后的上下文语义信息与双通道图卷积网络的输出计算注意力得到最终分类表示。实验结果表明，该模型在Twitter、Laptop14、Restaurant14和Restaurant16 4个公开数据集上的准确率分别为74.57%、79.15%、83.84%、91.23%，F1值分别为72.59%、75.76%、77.00%、77.11%，与传统方面级情感分析基准模型相比均有提升，有助于方面级的情感极性分类。

关键词: 方面级情感分析, 图卷积网络, 门控机制, 词性信息, 多图感知机制

Abstract:

Aspect-Based Sentiment Analysis(ABSA) is a research focal point in natural language processing, whose task is to predict the emotional polarity of a given aspect in a sentence. Currently, most studies have overlooked the role of aspect words and specific Part-Of-Speech(POS) words in filtering contextual semantic information related to emotional polarity and understanding contextual grammatical information. Accordingly, a Graph Convolutional Network(GCN) based on aspect POS perception, ASP_POSGCN, is proposed. It adopts a bidirectional Long Short-Term Memory(LSTM) network to model context and POS information, filtering contextual semantic information related to aspect words through a gate mechanism, and further filtering using the state of the POS information hiding layer. Simultaneously, it designs an aspect POS perception matrix algorithm to reconstruct the original dependency relationship of sentences based on the contribution of different POS words to the emotional polarity of aspect words, to obtain the reconstructed dependency syntax graph. The original and reconstructed dependency syntax graphs are applied to the dual-channel GCN and multi-graph perception mechanism. Finally, it uses the filtered contextual semantic information and the output of the dual channel GCN, and attention is calculated to obtain the final classification representation. The experimental results demonstrate that the accuracy of the model on four public datasets, Twitter, Laptop14, Restaurant14 and Restaurant16, is 74.57%, 79.15%, 83.84%, and 91.23%, and the F1 values are 72.59%, 75.76%, 77.00%, and 77.11%, respectively. Compared with the traditional ABSA benchmark model, it has improved and is beneficial to sentiment polarity classification in aspects.

Key words: Aspect-Based Sentiment Analysis(ABSA), Graph Convolution Network(GCN), gate mechanism, Part-Of-Speech(POS) information, multi-graph perception mechanism

夏卫欢, 廖列法, 张守信, 张燕琴. 基于方面-词性感知的方面级情感分析[J]. 计算机工程, 2024, 50(3): 68-77.

Weihuan XIA, Liefa LIAO, Shouxin ZHANG, Yanqin ZHANG. Aspect-Based Sentiment Analysis Based on Aspect-Part-Of-Speech Perception[J]. Computer Engineering, 2024, 50(3): 68-77.

http://www.ecice06.com/CN/Y2024/V50/I3/68

图/表 18

图1 ASP_POSGCN模型结构

Fig.1 Structure of ASP_POSGCN model

图2 长短期记忆网络结构

Fig.2 Structure of long short-term network

图3 双向长短期记忆网络结构

Fig.3 Structure of bi-directional long short-term network

图4 原始依存句法树

Fig.4 Primitive dependency syntax tree

图5 依存句法树重构

Fig.5 Reconstruction of dependency syntax tree

图6 消融模型与准确率的关系

Fig.6 The relationship between ablation models and accuracy

图7 消融模型与F1值的关系

Fig.7 The relationship between ablation models and F1 value

图8 特征相关系数

$ {\alpha } $

与准确率的关系

Fig.8 The relationship between characteristic correlation coefficient

$ {\alpha } $

and accuracy

图9 特征相关系数

$ {\alpha } $

与F1值的关系

Fig.9 The relationship between characteristic correlation coefficient

$ {\alpha } $

and F1 value

图10 词性嵌入维度与准确率的关系

Fig.10 The relationship between the embedding dimension of part-of-speech and accuracy

图11 词性嵌入维度与F1值的关系

Fig.11 The relationship between the embedding dimension of part-of-speech and F1 value

图12 GCN层数与准确率的关系

Fig.12 The relationship between GCN layers and accuracy

图13 GCN层数与F1值的关系

Fig.13 The relationship between GCN layers and F1 value

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