Retrieval device, terminal and retrieval method

Abstract

The invention discloses a retrieval device, a terminal and a retrieval method. The retrieval device comprises an acquiring unit, a screening unit and a retrieval result confirming unit, wherein the acquiring unit is used for receiving an input retrieval item and acquiring documents which comprise the retrieval item, the screening unit is used for counting a predicted weight value of each document, screening a preset number of primary documents from the documents with the retrieval item according to the predicted weight values, and the retrieval result confirming unit is used for reading position data of the retrieval item in each primary document, calculating a position relevancy according to the position data, and using the primary document of which the position relevancy satisfies the preset condition as a retrieval result. The retrieval device, the terminal and the retrieval method predicate the intermediate retrieval result according to the document characteristics and only read the position data and calculate the position relevancy of the part with good predicated result, and accordingly the position data reading amount and calculating amount are greatly reduced, and the retrieval speed is improved.

Description

technical field [0001] The present invention relates to the technical field of retrieval, in particular to a retrieval device, a terminal with the retrieval device and a retrieval method. Background technique [0002] In the full-text retrieval system, the index program scans the original document, divides the content of the document into words, creates an index item for each term (Term), indicates the number and position of the term in the document, and creates an inverted index. Index files, and then you can use the inverted index to provide fast full-text search. [0003] During the retrieval process, the search request submitted by the user may be a term in the index library. At this time, it is only necessary to find the term in the inverted index according to the search term, and then read the list of documents containing the term. , and where that term occurs in each document in the list (if desired). Such retrieval does not require too much calculation and can retu...

AI Technical Summary

Problems solved by technology

[0007] Although related technologies use data pointers to improve retrieval performance, a large number of calculations are still required in the phrase retrieval process

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