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Chinese Journal of Management Science ›› 2024, Vol. 32 ›› Issue (6): 140-150.doi: 10.16381/j.cnki.issn1003-207x.2021.1159

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Researchon Multi-class Sentiment Classification Based on BERT and Dynamic Ensemble Selection

Zhongliang Zhang,Qinjun Fei,Yuyu Chen,Xinggang Luo()   

  1. School of Management,Hangzhou Dianzi University,Hangzhou 310018,China
  • Received:2021-06-09 Revised:2021-08-27 Online:2024-06-25 Published:2024-07-03
  • Contact: Xinggang Luo E-mail:xgluo@hdu.edu.cn

Abstract:

To handle semantic deficiency of text feature vector extracted by classic methods and the issue of multi-classsentimentclassification in the text emotion recognition task, a novel multi-class sentiment classification strategy based onBidirectional Encoder Representations from Transformers (BERT) and dynamic ensemble selection (DES) is proposed. First, BERT is used to vectorize the text.Then, the OVO strategy is used to divide the multi-class sentiment classification problem into multiple binary classification sub-problems.Next, the dynamic ensemble selection strategy is developed to construct binary classifier for dealing with each sub-problem.Finally, the final prediction result is obtained based on the aggregation strategy. A public movie review data set is employed to carry out the experimental analysis. The experimental results indicate that(1) the BERT model is helpful in improving the multi-class sentiment classification performancewith respect to these traditional methods, namely TFIDF and Wor2Vec, (2) it is effective to use the DES strategy for dealing with each sub-problem in multi-class sentiment classification, and (3)the performance of the proposed method is also significantlybetter than that of the existing well-known methods for multi-class sentiment analysis.

Key words: text sentiment analysis, BERT, multi-class, dynamic ensemble selection, decomposition strategy

CLC Number: