Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"dense retrieval"”.
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Information Retrieval with Dense and Sparse Representations
Information retrieval, at the core of numerous applications such as search engines and open-domain question-answering systems, relies on effective textual representation and semantic matching. However, current approaches can lose nuanced lexical detail information due to an information bottleneck …
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Multimodal learning and language models for enhanced knowledge representations
… hypergraphs. The second contribution tackles dense retrieval in environments with limited labeled data by developing a novel weakly supervised semantic distillation framework. Leveraging the rich semantic understanding embedded in large language models along with negative sampling strategies, …
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Augmenting Multi-modal Question Answering Systems with Retrieval Methods
… models. This thesis explores the integration of retrieval-augmented generation (RAG) into multi-modal question answering (QA) systems as a solution to these challenges. By leveraging external knowledge sources, RAG enhances model accuracy and access to domain-specific information. The research …
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Models and Application of Question Retrieval for Natural Language Processing
… datasets. The first part addresses question retrieval at scale. We introduce QUADRo, a retrieval framework operating over millions of question-answer pairs, and the Question Ranking Corpus (QRC), a large-scale resource with answer-aware annotations and challenging hard negatives. We …