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 20 of 25 for “"Question-answering systems"”.
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Improving Question Answering Systems with Retrieval Augmented Generation
… neural retriever component, in a domain-specific question answering (QA) task. Empirically, we study how RAG helps LLMs in knowledge-intensive situations and explore design decisions in building a RAG pipeline. Our findings underscore the benefits of RAG in the studied situation by showing that …
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Loss and Reward Functions for Generative Question Answering Systems
… we extended our approach to automatic evaluation systems for QA. In particular, we designed SQuAre (Sentence-level QUestion AnsweRing Evaluation), an innovative reference-based metric that utilizes multiple positive and negative references for evaluating QA systems. As described in our paper, …
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Augmenting Multi-modal Question Answering Systems with Retrieval Methods
The quest to develop artificial intelligence systems capable of handling intricate tasks has propelled the prominence of deep learning, particularly since 2016, when neural network models emerged as the mainstream approach. With applications ranging from recommender systems to speech recognition, …
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Enhancing the verifiability of large language model based medical question answering systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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A question to query LLM as a pipeline replacement in knowledge graph question answering systems
Knowledge Graph Question Answering (KGQA) pipelines commonly depend on separate entity and relation predictors before querying the graph, which introduces engineering complexity and costly inference passes over large vocabularies. This thesis presents a drop-in replacement for those modules: a …
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An systematic evaluation on leading large language models and their factuality investigation as question answering systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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An systematic evaluation on leading large language models and their factuality investigation as question answering systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Prism : an answer projection system
… the best attributes of traditional and Web-based question answering systems. Traditional question answering systems retrieve answers with pinpoint accuracy but limited coverage, using a small and reliable data source, while Web-based systems retrieve answers with broad coverage but limited …
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Coreference resolution on entities and events for hospital discharge summaries
… quality monitoring and medical- assist question answering systems. This thesis studies coreference resolution, an information extraction (IE) subtask that links together specific mentions to each entity. Coreference resolution enables us to find changes in the state of entities and makes …
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Answering definitional questions before they are asked
Most question answering systems narrow down their search space by issuing a boolean IR query on a keyword indexed corpus. This technique often proves futile for definitional questions, because they only contain one keyword or name. Thus, an IR search for only that term is likely to produce many …
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Information Retrieval with Dense and Sparse Representations
… 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 in dense retrieval, or rely on exact lexical …
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Data Augmentation with Seq2Seq Models
… issue that complicates the training process of question answering systems: syntactically diverse but semantically equivalent sentences can have significant disparities in predicted output probabilities. We propose a method for generating an augmented paraphrase corpus for the visual question …
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Building a Trustworthy Question Answering System for Covid-19 Tracking
… this problem, in this Thesis, we propose a question answering system that can be interacted with using simple natural language-based sentences. While building this system, we investigate qualified public data resources and from the data content they are providing, and we collect a set of …
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SAL : a Self-Aware Learning system
… side, I argue that SAL can inform production question answering systems research. SAL can answer multi-step questions that are grounded in the world by extracting operational knowledge from pre-trained word embeddings. As an example, SAL knows how to use the action associated with \grab [the] …
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Syntax-based Concept Extraction For Question Answering
<p>Question answering (QA) stands squarely along the path from document retrieval to text understanding. As an area of research interest, it serves as a proving ground where strategies for document processing, knowledge representation, question analysis, and answer extraction may be evaluated in …
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A framework for evaluating semi-structured hierarchical data using language models
… in applying them to tasks such as extractive question answering over semi-structured hierarchical data represented in markup languages. The conventional practice of linearising markup to plain text involves removing structural information that is integral to interpretation, and existing …
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Models and Application of Question Retrieval for Natural Language Processing
This thesis investigates the role of question understanding in Question Answering systems, developing methods that exploit question semantic equivalence at progressively larger scales: from individual question pairs, through equivalence clusters, to entire datasets. The first part addresses …
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