Improve CNN and LSTM in sentiment analysis for Vietnamese from data preprocessing phase

Abstract

The deep learning method has achieved good results in many application fields, such as image Processing and Computer Vision. Recently, this method has also been used in the field of natural language Processing and has achieved good results too. In this area, an issue of concern is subjective opinion classification, A subjective opinion is an individuals thinking or judgment about a product or a socio-cultural event or issue. Subjective opinions have received attention from many producers and businesses who are interested in exploiting the opinions of the community and scientists.