An Improved Cross-Domain Sentiment Analysis Based on a Semi-Supervised Convolutional Neural Network

An Improved Cross-Domain Sentiment Analysis Based on a Semi-Supervised Convolutional Neural Network

Lap-Kei Lee (Hong Kong Metropolitan University, Hong Kong), Kwok Tai Chui (Hong Kong Metropolitan University, Hong Kong), Jingjing Wang (Hong Kong Metropolitan University, Hong Kong), Yin-Chun Fung (Hong Kong Metropolitan University, Hong Kong) and Zhanhui Tan (Hong Kong Metropolitan University, Hong Kong)
DOI: 10.4018/978-1-7998-8413-2.ch007
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Abstract

The dependence on Internet in our daily life is ever-growing, which provides opportunity to discover valuable and subjective information using advanced techniques such as natural language processing and artificial intelligence. In this chapter, the research focus is a convolutional neural network for three-class (positive, neutral, and negative) cross-domain sentiment analysis. The model is enhanced in two-fold. First, a similarity label method facilitates the management between the source and target domains to generate more labelled data. Second, term frequency-inverse document frequency (TF-IDF) and latent semantic indexing (LSI) are employed to compute the similarity between source and target domains. Performance evaluation is conducted using three datasets, beauty reviews, toys reviews, and phone reviews. The proposed method enhances the accuracy by 4.3-7.6% and reduces the training time by 50%. The limitations of the research work have been discussed, which serve as the rationales of future research directions.
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1. Introduction

Internet has become one of the most important tools in our daily life, with the ever-increasing penetration rate. It exceeded 60% this year according to Statista (Statista, 2021). The use of Internet relies more heavily on smartphones compared with computers attributable to the mobility and weight. During pandemic (COVID-19), we have witnessed the escalation of the penetration rate of internet for leisure and online shopping to maintain social-distancing and prevent the outbreak of the pandemic (Chang, & Meyerhoefer, 2021). More and more users begin to use online services, whom tend to read and share review comments on products. Before adding the items into shopping bag, it is often for one to consider the following criteria (i) review comments from other buyers; (ii) reputation of sellers; and (iii) price and quality. Particularly, the review comments contain complex and valuable information which can be effectively analysed via natural language processing (NLP) and artificial intelligence (AI). The research topic is known as sentiment analysis.

The contents can be generally categorized into 3-class, positive, neutral, and negative. In addition, multiple sources, as cross domains could be considered to enhance the analysis. In this chapter, the formulation tackles with 3-class cross-domain sentiment analysis.

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