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Exact(10)
In the case of large document collections, the resulting number of matching documents can far exceed the number a human user could possibly sift through.
Boolean queries just retrieve a set of matching documents, but commonly we wish to have an effective method to order (or ''rank") the returned results.
Additionally, it is worth noting that the fetchdoc command can be used to return either all matching documents (not always desirable) or just the first match.
Document-document similarity values are calculated as dot products between pairs of rows in matrix D. BM25, also called Okapi BM25, is a ranking function that is widely used by search engines to rank matching documents according to their relevance to a query [34], [35].
Okapi is a probabilistic function that ranks the matching documents to a given query based on their relevance.
The fastest query was 'lysine', which completed in 0.28 s but only had seven matching documents in the database.
Similar(50)
The search process will look for the matched documents and return results to the user.
Traditional search engines have no inherent understanding of what a user wants but matches documents to queries based on presence or lack of presence of search terms.
The information the books contained, including details about meetings between C.I.A. informants and undercover agents, as well as their real names and phone numbers, matched documents that Mr. Lee had written while at the C.I.A., according to court documents.
After buying the house for $2.3 million, Ratner stripped out nearly every inch of the walls, pipes and wiring so the finishes could be recast to match documents dating from its construction in 1929.
In this case, query-document matching is performed, and all matched documents are retrieved and listed according to the ranking algorithm.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com