关键词: 虚假评论检测, 预训练模型, 情感分析, 联合训练, Center Loss

Abstract: Product review information is an important basis for users’ online decision-making. However, driven by profit, businesses often hire professional writers to write a large number of fake reviews to mislead users and achieve the purpose of packaging themselves and denigrating competitors, resulting in unfair business competition and extremely poor user experience. In response to this phenomenon, we improved the existing spam review recognition methods through Pre-training Models, and proposed a joint pre-training learning method that can simultaneously integrate the semantic and sentimental information of product reviews. In view of the powerful semantic representation capabilities of the pre-trained model, we apply two pre-trained encoders to extract the semantic and emotional features of reviews in the joint learning framework. We integrate the two types of features through joint pre-training learning method. Apart from that, we add the Center Loss function to optimize the model. We have conducted several verification experiments on multiple public data sets and multiple different tasks. The experiments show that our proposed joint model has achieved the best results and has a stronger generalization in both fake review detection and sentiment analysis tasks.

Key words: fake review detection, pre-training model, sentiment analysis, joint learning framework, Center Loss