title: Econo-ESA in semantic text similarity.
abstract: Explicit semantic analysis (ESA) utilizes an immense Wikipedia index matrix in its interpreter part. This part of the analysis multiplies a large matrix by a term vector to produce a high-dimensional concept vector. A similarity measurement between two texts is performed between two concept vectors with numerous dimensions. The cost is expensive in both interpretation and similarity measurement steps. This paper proposes an economic scheme of ESA, named econo-ESA. We investigate two aspects of this proposal: dimensional reduction and experiments with various data. We use eight recycling test collections in semantic text similarity. The experimental results show that both the dimensional reduction and test collection characteristics can influence the results. They also show that an appropriate concept reduction of econo-ESA can decrease the cost with minor differences in the results from the original ESA.
authors.affiliation: State Polytechnics of Malang, Soekarno Hatta 9, Malang, Indonesia ; Kumamoto University, 2-39-1 Kurokami, Chuo-Ku, Kumamoto, 860-8555 Japan.
authors.forename: Faisal
authors.initials: F
authors.lastname: Rahutomo
authors.affiliation: Kumamoto University, 2-39-1 Kurokami, Chuo-Ku, Kumamoto, 860-8555 Japan.
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Aritsugi
keywords: ESA; GVSM; Semantic text similarity