Abstract
Sentiment analysis is a computational analysis of unstructured textual data, used to assess the person's attitude from a piece of text. Aspect-based sentimental analysis defines the relationship among opinion targets of a document and the polarity values corresponding to them. Since aspects are often implicit, it is an extremely challenging task to spot them and calculate their respective polarity. In recent years, several methods, strategies and improvements have been suggested to address these problems at various levels, including corpus or lexicon-based approaches, term frequency and reverse document frequency approaches. These strategies are quite effective when aspects are correlated with predefined groups and may struggle when low-frequency aspects are involved. In terms of accuracy, heuristic approaches are stronger than frequency and lexicon based approaches, however, they consume time due to different combinations of features. This article presents an effective method to analyze the sentiments by integrating three operations: (a) Mining semantic features (b) Transformation of extracted corpus using Word2vec (c) Implementation of CNN for the mining of opinion. The hyperparameters of CNN are tuned with Genetic Algorithm (GA). Experimental results revealed that the proposed technique gave better results than the state-of-the-art techniques with 95.5% accuracy rate, 94.3% precision rate, 91.1% recall and 96.0% f-measure rate.
Highlights
The Natural Language Processing (NLP) always has a great importance in Sentiment Analysis (SA)
SA is a subfield of NLP, could be referred to as opinion mining
An analysis of the results shows that investor sentiment has a greater impact on value stocks
Summary
The Natural Language Processing (NLP) always has a great importance in Sentiment Analysis (SA). Such data is important for organizations to take some serious decisions while unstructured data exist in the shape of a text document, email, pdf file and reviews Mining this data to find people and their views who are interested in a particular item or service is very significant to many stakeholders, including governments and businesses. Design of the methodology is presented in Fig., which shows the training and testing units of the reviews that are passed to the machine learning algorithm, and sentiment analysis is carried out. The working design of the methodology is presented, Showing the training and testing units of the study that are passed to the machine learning algorithm, sentimental analysis is carried out. The order of the paper is as follow Section: 2 include literature review, Section: 3 contains Problem statement, Section: 4 and Section: 5 presents the proposed methodology and proposed techniques, Section: 6 contain experimental design while the study of the results in Section: 7 and eventually Section: 8 concludes the paper
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