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Showing 1 to 3 of 3 for “"lexical matching"”.
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Application and Evaluation of Unified Medical Language System Resources to Facilitate Patient Information Acquisition through Enhanced Vocabulary Coverage
… the Unified Medical Language System (UMLS). Two lexical matching techniques for identifying SNOMED concepts contained in free-text were evaluated, 1) lexical matching using SNOMED version 3.3 terms alone and 2) Metathesaurus-enhanced lexical matching. Metathesaurus-enhanced lexical matching …
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Soft matching for question answering
I identify weaknesses in exact matching of syntactic and semantic features in current question answering (QA) systems. Such hard matching may fare poorly given variations in natural language texts. To combat such problems, I develop two soft matching schemes. I implement both soft matching schemes …
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Information Retrieval with Dense and Sparse Representations
… on effective textual representation and semantic matching. However, current approaches can lose nuanced lexical detail information due to an information bottleneck in dense retrieval, or rely on exact lexical matching and thus overlook the broader contextual relevance when using sparse retrieval. …