AN IMPROVED GRU BASED ON RECURRENT ATTENTION UNIT AND SELF- ATTENTION TECHNIQUE FOR TEXT SENTIMENT ANALYSIS

In text sentiment analysis, a crucial challenge is that conventional word vectors fail to capture lexical ambiguity. The Gated Recurrent Unit (GRU), an advanced variant of RNN, is extensively utilized in natural language processing tasks such as information filtering, sentiment analysis, machine translation, and speech recognition. GRU can retain sequential information, but it lacks the ability to focus on the most relevant features of a sequence. Therefore, this paper introduces a novel text sentiment analysis-based RNN approach, a Recurrent Attention Unit (RAU), which incorporates an attention gate directly within the traditional GRU cell. This addition enhances GRU’s capacity to retain long-term information and selectively concentrates on critical elements in sequential data. Furthermore, this study integrates an improved Self-Attention technique (SA) with RA-GRU known as SA+RA-GRU. The improved self-attention technique is executed to reallocate the weights of deep text sequences. While attention techniques have recently become a significant innovation in deep learning, their precise impact on sentiment analysis has yet to be fully evaluated. The experimental findings show that the proposed approach SA+RA-GRU attains an accuracy of 92.17%, and 82.38% on the IMDB, and MR datasets, and outperformed traditional approaches. Moreover, the SA+RA-GRU model demonstrates excellent generalization and robust performance.