SentiVec: Learning Sentiment-Context Vector via Kernel Optimization Function for Sentiment Analysis

Deep learning-based sentiment analysis (SA) methods have drawn more attention in recent years, which calls for more precise word embedding methods. This article proposes SentiVec, a kernel optimization function system for sentiment word embedding, which is based on two phases. The first phase is a supervised learning method, and the second phase consists of two unsupervised updating models, object-word-to-surrounding-words reward model (O2SR) and context-to-object-word reward model (C2OR). SentiVec is aimed at: 1) integrating the statistical information and sentiment orientation into sentiment word vectors and 2) propagating and updating the semantic information to all the word representations in a corpus. Extensive experimental results show that the optimal sentiment vectors successfully extract the features in terms of semantic and sentiment information, which makes it outperform the baseline methods on word similarity, word analogy, and SA tasks.