Challenge: Existing studies show that LLMs face challenges in effectively using retrieved information . authors propose a method that considers LLM as "Information Refiner"
Approach: They propose a method that considers LLMs as "Information Refiners" they propose INFO-RAG, which is low-cost and general across various tasks .
Outcome: The proposed method improves performance of LLaMA2 by 9.39% relative points . it is low-cost and general across various tasks, and is robust and in-context learning is possible .

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Challenge: Retrieval-augmented generation (RAG) enhances large language models by integrating external knowledge retrieved at inference time.
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Fine-Tuning or Retrieval? Comparing Knowledge Injection in LLMs (2024.emnlp-main)

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Challenge: Large language models (LLMs) encapsulate a vast amount of factual information within their pre-trained weights.
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Open-RAG: Enhanced Retrieval Augmented Reasoning with Open-Source Large Language Models (2024.findings-emnlp)

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Challenge: Existing methods to integrate Large Language Models with external knowledge suffer from limited reasoning capabilities, especially when using open-source LLMs.
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Enhancing Retrieval-Augmented Generation: A Study of Best Practices (2025.coling-main)

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Challenge: Retrieval-augmented generation systems have shown remarkable advancements by integrating retrieval mechanisms into language models, enhancing their ability to produce more accurate and contextually relevant responses.
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M-RAG: Reinforcing Large Language Model Performance through Retrieval-Augmented Generation with Multiple Partitions (2024.acl-long)

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Challenge: Existing methods for retrieving relevant memories from an external database are coarse-grained and can cause noise and focus on crucial memories.
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Systematic Knowledge Injection into Large Language Models via Diverse Augmentation for Domain-Specific RAG (2025.findings-naacl)

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Challenge: Retrieval-Augmented Generation (RAG) enhances response relevance by incorporating retrieved domain knowledge in the context, retrieval errors can still lead to hallucinations and incorrect answers.
Approach: They propose a framework that augments the learning process by context augmentation and knowledge paraphrasing by incorporating retrieved domain knowledge into the context.
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RAG-Studio: Towards In-Domain Adaptation of Retrieval Augmented Generation Through Self-Alignment (2024.findings-emnlp)

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Challenge: Existing RAG systems that use pre-trained LLMs and retrievers often fail in specialized domains and applications.
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R2AG: Incorporating Retrieval Information into Retrieval Augmented Generation (2024.findings-emnlp)

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Challenge: Existing approaches to augment large language models with external documents are lacking in the semantic gap between LLMs and retrievers due to differences in their training objectives and architectures.
Approach: They propose to integrate R2AG into R2etrieval augmented generation framework by using a R2-Former to capture retrieval information.
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Retrieval-Augmented Machine Translation with Unstructured Knowledge (2025.findings-emnlp)

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Challenge: Retrieval-augmented generation (RAG) is a new approach to enhance large language models (LLMs).
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LLM-Generated Text May Harm Your Retrieval! A Robust Detection Strategy for Retrieval-Augmented Generation (2026.acl-long)

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Challenge: Retrieval-augmented generation (RAG) improves accuracy and timeliness of large language models, but external corpora may become contaminated with LLM-generated texts.
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