Concept-Based Information Retrieval Using Explicit Semantic Analysis
نویسندگان
چکیده
منابع مشابه
Cross-language Information Retrieval with Explicit Semantic Analysis
We have participated on the monolingual and bilingual CLEF Ad-Hoc Retrieval Tasks, using a novel extension of the by now well-known Explicit Semantic Analysis (ESA) approach. We call this extension Cross-Language Explicit Semantic Analysis (CL-ESA) as it allows to apply ESA in a cross-lingual information retrieval setting. In essence, ESA represents documents as vectors in the space of Wikipedi...
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previous Information retrieval (IR) systems based on keywords to retrieve and index documents. They may return inaccurate results when different keywords are employed to illustrate the same concept in the documents and in the queries presented by Users. In Concept-based retrieval methods have tried to tackle these troubles by using concept-based comparison between documents and queries. Therefo...
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Concept-based access to information promises important benefits over keyword-based access. One of these benefits is the ability to take advantage of semantic relationships among concepts in finding relevant documents. Another benefit is the elimination of irrelevant documents by identifying conceptual mismatches. Concepts are mental structures. Words and phrases are the linguistic representativ...
متن کاملSemantic relations in concept-based cross-language medical information retrieval
We explore and evaluate the usefulness of semantic annotation, particularly semantic relations, in cross-language information retrieval in the medical domain. As the baseline for automatic semantic annotation we use UMLS, which specifies semantic relations between medical concepts. We developed two methods to improve the accuracy and yield of relations in CLIR: a method for relation filtering a...
متن کاملConcept Based Information Retrieval
Accounting for textual variation in the documents and queries processed by information retrieval systems is considered essential for achieving good retrieval. Recent research has called into question several ofthe techniques used to support this endeavor This paper reports on experiments with a concept based information retrieval system which relies on a program called MetaMap to accountfor tex...
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ژورنال
عنوان ژورنال: ACM Transactions on Information Systems
سال: 2011
ISSN: 1046-8188,1558-2868
DOI: 10.1145/1961209.1961211