Implicit opinion analysis: Extraction and polarity labelling
针对文本中缺少或模糊的观点词，采用深度神经网络和词嵌入方法，在中文酒店评论中提取和标注隐式观点，发现卷积神经网络优于传统模型。
Opinion words are crucial information for sentiment analysis. In some text, however, opinion words are absent or highly ambiguous. The resulting implicit opinions are more difficult to extract and label than explicit ones. In this paper, cutting‐edge machine‐learning approaches – deep neural network and word‐embedding – are adopted for implicit opinion mining at the snippet and clause levels. Hotel reviews written in Chinese are collected and annotated as the experimental data set. Results show the convolutional neural network models not only outperform traditional support vector machine models, but also capture hidden knowledge within the raw text. The strength of word‐embedding is also analyzed.