Microblog query expansion method based on multiple layers
A query expansion, multi-level technology, applied in the field of Internet information search, can solve problems such as damage to the accuracy of retrieval results, reduce retrieval efficiency, query drift, etc., to alleviate the mismatch problem, reduce query drift, and refine query expansion. Effect
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[0020] See attached figure 1 In the present invention, the original Weibo query term is extracted from the corresponding corpus PRF layer and the external source web layer as the candidate query expansion term, and the candidate query expansion term and the original Weibo query term are used as the tag set to the PRF layer Labeled documents, use Labeled LDA to perform semantic modeling on the labeled PRF documents, and then map candidate query expansion words and original Weibo query words from different sources to a unified semantic layer, and dig out their potential semantics, and based on The semantic similarity between them filters out candidate expansion words that have nothing to do with the meaning of the original Weibo query words, and add them as query expansion words to the original Weibo query words to form new Weibo query words, and use the expanded new Weibo query The query results can be more in line with the user’s real information needs. The specific expansion o...
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