基于深度学习的隐性评价对象识别方法

Implicit Evaluation Object Recognition Method Based on Deep Learning

在线评论文本具有口语化的特点,其评价词缺少对应的评价对象,影响了细粒度情感分析的效果。为此,提出一种利用深度学习自动识别评价对象的方法。设计研究领域的文本序列标注规范,在对评论语料分词后,进行评价词与评价对象的命名实体标注,得到单词序列、词性序列和标注序列。将单词序列、词性序列转为神经网络语言模型的词向量,并用循环神经网络进行训练,采用条件随机场(CRF)输出评价对象标签,得到缺失的评价对象。实验结果表明,与单一CRF模型相比,BiLSTM+CRF模型和BiGRU+CRF模型的识别效果较好,BiGRU+CRF模型的 F 1值最高可达0.84。

Online review text has the characteristics of colloquialism,and its evaluation words lack corresponding evaluation objects,which affects the effect of fine-grained sentiment analysis.Therefore,a method of automatic identification of evaluation objects based on deep learning is proposed.The specification of text sequence annotation in the research field is designed,the Named Entity Recognition (NER) of the evaluation word,as well as the evaluation object after the comment word segmentation is annotated,and the word sequence,the word part sequence and the tagging sequence are achieved.Transfer the word sequence and the word part sequence to the word vectors of the neural network language model,and train them with Recurrent Neural Network (RNN).Conditional Random Field(CRF) is used to output the tag of the evaluation object,and the evaluation object is achieved as well.Experimental results show that compared with single CRF model,BiLSTM+CRF model and BiGRU+CRF model have better recognition effects and the F 1 value of BiGRU+CRF model can reach up to 0.84.