Relaxing Orthogonality Assumption in Conceptual Text Document Similarity
Xiangru Wang, Seyednaser Nourashrafeddin, Evangelos Milios · 2016
By reflecting the degree of proximity or remoteness of documents, similarity measure plays the key role in text analytics. Traditional measures, e.g. cosine similarity, assume that documents are represented in an orthogonal space formed by words as dimensions.