... topic relevance and opinion generation (Zhang and Ye, 2008). This model led to satis-factory performance, but an intensive computa-tion load was inevitable during retrieval, since for each ... relevant targets for the two topics, and therefore many word pairs ended up the same. As a result, documents belonging to topic 7 and topic 8 could not be differentiated, and they both performed ... topic term and a sentiment word, and it likely expresses a relevant opinion. On the other hand, if a document has links to many word pairs, the document is with many relevant opi-nions, and it...