We optimize the collocations of relevant aspect words and phrases in the GPU framework in two ways: Word to phrase: Intuitively, if an aspect word is assigned to a topic then that topic should represent that aspect and to all other phrases in that aspect's phrase set (i.e., phrases containing that aspect) should belong to the same topic.
when an aspect word is assigned to a topic then each phrase in its aspect set is promoted with a small count in that topic.