Table 1. Listing of text-based similarity approaches and locations where the similarity calculations were performed.
Similarity approach | Data source | |
MeSH terms | Title/abstract words | |
tf-idf cosine | tf-idf MeSH (Indiana U.) | tf-idf TA (Indiana U.) |
Latent semantic analysis | LSA MeSH (Indiana U.) | LSA TA (Indiana U.) |
Topic modeling | Topics TA (UC Irvine) | |
Self-organizing map | SOM MeSH (SDSU/Indiana U.) | |
Poisson-based | BM25 MeSH (Collexis) | BM25 TA (Collexis) PMRA (UC Irvine/SciTech) |