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• W4308654829 abstract "Entity-based ranking is a popular research area in document ranking as knowledge graphs can introduce additional evidence for ranking systems. In most entity-based ranking framework, the original query is transformed into a set of entities and candidate documents are ranked according to their relevance to the entity set. However, mistakes can easily occur during the transformation process, which introduce noise to the ranking system. This paper represents an expansion-based ranking framework, which expand the original query with high-quality candidate entities to mitigate the impact of transformation mistakes and enrich the semantics of the query in the meanwhile. Compared with existing query expansion methods, our expansion method is lightweight as it reduces much computational burden and requests little extra information. However, the core concerns of the users might be covered up after query expansion. To alleviate this dilemma, a core concern capturing method is pro-posed, wherein the attention weight of each inter-entity relation is measured to capture the core entity pairs in the expanded query. Experiments on the S2-CS dataset demonstrate the effectiveness of our lightweight query expansion method and the superiority of our core concern capturing method. Compared with a classical retrieval model, our method provides 11% improvements in terms of NDCG@15." @default.
• W4308654829 created "2022-11-13" @default.
• W4308654829 creator A5016156647 @default.
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• W4308654829 date "2022-09-23" @default.
• W4308654829 modified "2023-09-24" @default.
• W4308654829 title "An Expansion-based Document Ranking Framework Incorporated with Core Concern Capturing" @default.
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• W4308654829 doi "https://doi.org/10.1109/icoias56028.2022.9931242" @default.
• W4308654829 hasPublicationYear "2022" @default.
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