A Conditional Random Field (CRF) Based Machine Learning Framework for Product Review Mining

• Main Author: Ming, Yue
• Format: Others
• Published: North Dakota State University 2019
• Subjects: conditional random fields; machine learning; natural language processing; opinion mining; text mining
• Online Access: https://hdl.handle.net/10365/29406

The task of opinion mining from product reviews has been achieved by employing rule-based approaches or generative learning models such as hidden Markov models (HMMs). This paper introduced a discriminative model using linear-chain Conditional Random Fields (CRFs) that can naturally incorporate arbitrary, non-independent features of the input without conditional independence among the features or distributional assumptions of inputs. The framework firstly performs part-of-speech (POS) tagging tasks over each word in sentences of review text. The performance is evaluated based on three criteria: precision, recall and F-score. The result shows that this approach is effective for this type of natural language processing (NLP) tasks. Then the framework extracts the keywords associated with each product feature and summarizes into concise lists that are simple and intuitive for people to read.