In this paper, we assess the impact of using thesaurus-based query expansion methods, at the Information Retrieval (IR) stage of a Question Answering (QA) system. We focus on expanding queries for questions regarding actions and events, where verbs have particularly important roles. Two different thesaurus are used: the OpenOffice thesaurus and an automatically generated verb thesaurus. The per...

this research aims to compare the capabilities of a thesaurus and an ontology for representation of domain knowledge. this is the first to focus on the construction of an ontology in library and information science (lis), in the domain of indexing and in persian language. the research also develops the methodology of ontology construction by implementing domain analysis methodology. the present...

New linguistic formations in the media’s description and evaluation of protest events Belarus (“belmaidan”) on 09.08.2020 are considered as a thesaurus. The study is based descriptions sociolinguistic historical context Belarusian realities, provisions reference theory (which manifests itself only speech represents not reality itself, but its image) thesaurus system knowledge about world, prese...

This paper describe our method in automatic-adhoc task of TREC-7. We propose a method to improve the performance of information retrieval system by expanded the query using 3 di ferent types of thesaurus. The expansion terms are taken from handcrafted thesaurus (WordNet), co-occurrence-based automatically constructed thesaurus, and syntactically predicate-argument based automatically constructe...

The multilingual European Thesaurus on International Relations and Area Studies (European Thesaurus) is a special subject thesaurus for the field of international affairs. It is intended for use in libraries and documentation centres of academic institutions and international organizations. The European Thesaurus was established in a collaborative project involving a number of leading European ...

This paper proposes an innovative approach to improve the classification performance of Persian texts. The proposed method uses a thesaurus as a helpful knowledge to obtain more representative word-frequencies in the corpus. Two types of word relationships are considered in our used thesaurus. This is the first attempt to use a Persian thesaurus in the field of Persian information retrieval. Ex...

NCI Thesaurus entries reference corresponding nodes in the UMLS Semantic Network (SN). Adapting a process previously used to refine relationship definitions in the UMLS Metathesaurus, we used these Thesaurus-to-Network references to analyze alignment of the Thesaurus with the OBO Relations Ontology and at the same time validate and improve Thesaurus structure. Given this experience, we offer su...

This paper describes new thesaurus construction method in which class-based, small size thesauruses are constructed and merged as a whole based on domain classification system. This method has advantages in that 1) taxonomy construction complexity is reduced, 2) each classbased thesaurus can be reused in other domain thesaurus, and 3) term distribution per classes in target domain is easily ide...

the purpose of the present study is to explore the impact of new coming terms on the structure of the recent editions thesauri compared to the previous ones. the case of this research is the 14th and 13th editions of eric thesaurus. the findings' indicate that the new terms affect the structure of thesaurus in terms of omission, change, or addition of the terms interrelations. but the high...