ReMemNN: A novel memory neural network for powerful interaction in aspect-based sentiment analysis

摘要

Deep neural networks have been employed to analyze the sentiment of text sequences and achieved significant effect. However, these models still face the issues of weakness of pre-trained word embeddings and weak interaction between the specific aspect and the context in attention mechanism. The pre-trained word embeddings lack the specific semantic information from the context. The weak interaction results in poor attention weights and produces limited aspect dependent sentiment representation in aspect-based sentiment analysis (ABSA). In this paper, we propose a novel end-to-end memory neural network, termed Recurrent Memory Neural Network (ReMemNN), to mitigate the above-mentioned problems. In ReMemNN, to tackle weakness of pre-trained word embeddings, a specially module named embedding adjustment learning module is designed to transfer the pre-trained word embeddings into adjustment word embeddings. To tackle weak interaction in attention mechanism, a multielement attention mechanism is designed to generate powerful attention weights and more precise aspect dependent sentiment representation. Besides, an explicit memory module is designed to store these different representations and generate hidden states and representations. Extensive experimental results on all datasets show that ReMemNN outperforms typical baselines and achieve the state-of-the-art performance. Besides, these experimental results also demonstrate that ReMemNN is language-independent and dataset type-independent. (C) 2020 Elsevier B.V. All rights reserved.