Topic-based Vector Space Model.
The Topic-based Vector Space Model (TVSM) is a vector-based approach for document
comparison. In contrast to the classical VSM the approach proposed by the
TVSM does not assume independence between terms by being flexible in definition of
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term similarities. The main difference of TVSM as compared to VSM is the operational
vector space. TVSM represents documents as vectors in a k dimensional space
R which has only positive axis intercepts [11, 36].