Challenge: Existing approaches to relevance modeling have lacked generalization and accuracy . recent studies have focused on capturing the semantic relationships between queries and items .
Approach: They propose a framework that integrates world knowledge stored in LLMs with specialized domain knowledge represented by user behavior data for promising performance.
Outcome: The proposed framework can handle full-scale search traffics of Alipay with acceptable cost and latency.

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Efficient Integration of External Knowledge to LLM-based World Models via Retrieval-Augmented Generation and Reinforcement Learning (2025.findings-emnlp)

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Challenge: Existing attempts to enhance LLM-based world models through prompting or fine-tuning approaches are either requiring human knowledge or computationally extensive.
Approach: They propose a framework that leverages retrieval-augmented generation to integrate external knowledge to LLM-based world models.
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CPRM: A LLM-based Continual Pre-training Framework for Relevance Modeling in Commercial Search (2025.naacl-industry)

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Challenge: Relevance modeling between queries and items is a key component of commercial search engines.
Approach: They propose a framework for continual pre-training of LLMs to enhance domain knowledge . they employ queries and multi-field item to jointly pre-train for enhancing domain knowledge.
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Leveraging Self-Attention for Input-Dependent Soft Prompting in LLMs (2025.acl-short)

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Challenge: Large language models require fine-tuning, which is computationally expensive and challenging.
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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.
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Dynamic Uncertainty Ranking: Enhancing Retrieval-Augmented In-Context Learning for Long-Tail Knowledge in LLMs (2025.naacl-long)

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Challenge: Prior work has shown that in-context learning (ICL) with retriever augmentation can help LLMs better capture long-tail knowledge, reducing their reliance on pre-trained data.
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Index-Time Prefix Injection for Multi-Tenant Retrieval: Improving Search Relevance Without Model Fine-Tuning (2026.acl-industry)

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Challenge: a single multilingual biencoder handles all retrieval, but these are task-generic and domain-agnostic.
Approach: They propose a training-free method that prepending domain-descriptive prefixes to documents during indexing.
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PepRec: Progressive Enhancement of Prompting for Recommendation (2024.emnlp-main)

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Challenge: Large language models (LLMs) have been gaining in-depth performance in natural language processing domains.
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CuriousLLM: Elevating Multi-Document Question Answering with LLM-Enhanced Knowledge Graph Reasoning (2025.naacl-industry)

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Challenge: Large Language Models (LLMs) have achieved significant success in open-domain question answering, however, they continue to face challenges such as knowledge cutoffs and hallucinations.
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S3Prompt: Instructing the Model with Self-calibration, Self-recall and Self-aggregation to Improve In-context Learning (2024.lrec-main)

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Challenge: Large language models have limitations in practical applications, such as unsupervised generation and recall of in-context examples.
Approach: They propose a self-calibration, self-recall and self-aggregation prompt pipeline to solve these problems.
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ExPerT: Personalizing LLM Responses to Users’ Domain Expertise via Query-Wise Semantic and Keystroke Behavioral Cues (2026.acl-long)

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Challenge: Existing personalization methods relying on static profiles or text-only signals fail to capture query-specific expertise variation.
Approach: They propose a query-wise personalization framework that adapts LLM responses to query domain expertise by combining semantic and behavioral cues.
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