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With the exponential growth of telecommunications business scale, customer complaint responsibility determination has become a key link in the compliance management of communication operators. Traditional methods face challenges such as semantic decoupling difficulties and low efficiency of knowledge reuse when dealing with complex complaints and unstructured historical cases. This study, based on the existing business process and large language model technology, proposes a linked retrieval enhanced generation framework. Through hierarchical semantic decoupling and dynamic retrieval of historical knowledge, it achieves the precision and efficiency of complaint responsibility determination. The framework proposes a two-level complaint point splitting mechanism:The first level uses a hybrid semantic parsing to strip off compound demands, and the second level extracts core complaint points from the first-level complaint list through large model prompt technology, while dynamically processing historical documents to adapt to the second-level complaint matching, completing the structural transformation of the database. Finally, experiments based on 423 actual complaint data from a provincial operator show that compared with several traditional retrieval augmented generation(RAG)models,this method improves the retrieval accuracy by 18.87% and the retrieval recall rate by 14.13% . This research provides an efficient and reusable technical path for intelligent responsibility determination under a strong regulatory background and has important practical significance.
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随着电信业务规模的指数级增长,客户投诉判责成为通信运营商合规管理的关键环节。传统方法在处理复杂型投诉和非结构化历史案例时面临语义解耦困难、知识复用效率低等挑战。该研究面向现有业务流程基于大语言模型技术,提出一种链接式检索增强生成框架,通过层次化语义解耦与历史知识动态检索机制,实现投诉判责的精准化和高效化。该框架提出2级投诉点拆分机制:1级采用混合式语义解析剥离复合诉求,2级通过大模型提示技术从1级投诉列表中提取核心投诉点,同时动态处理历史文档适配2级投诉匹配,完成数据库的结构化改造。最后,基于某省级运营商423份实际投诉数据的实验表明,对比几种传统检索增强生成(RAG)模型,该方法在检索准确率方面提升18.87%,在检索召回率方面提升14.13%。该研究为强监管背景下的智能判责提供了高效的可复用的技术路径,具有重要的实践意义。
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| 评估方案 | Precision@5 | Recall@5 | Top覆盖 | HitRate |
|---|
| 混合检索 | 0.7735 | 0.8301 | — | — |
| RAG_lora_1.4B | 0.6528 | 0.7600 | 2.5660 | 0.3805 |
| RAG_lora_7B | 0.9038 | 0.9315 | 1.6350 | 0.4659 |
| RAG_纯大模型_7B | 0.8815 | 0.9023 | 1.8868 | 0.5120 |
| RAG_BERT_72B | 0.8867 | 0.9286 | 1.5283 | 0.5377 |
| RAG_纯大模型_72B | 0.9245 | 0.9619 | 1.8868 | 0.4783 |
| AutoRAG | 0.9433 | 0.9577 | 1.5472 | 0.4173 |
| InstructRAG | 0.9275 | 0.9296 | 1.6226 | 0.4101 |
| Linked-RAG | 0.9622 | 0.9714 | 1.3774 | 0.5214 |
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5种方案在电信投诉判责任务中的核心指标表现
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| 评估方案 | Precision@5 | Recall@5 | Top覆盖 | HitRate |
|---|
| 混合检索 | 0.7735 | 0.8301 | — | — |
| RAG_lora_1.4B | 0.6528 | 0.7600 | 2.5660 | 0.3805 |
| RAG_lora_7B | 0.9038 | 0.9315 | 1.6350 | 0.4659 |
| RAG_纯大模型_7B | 0.8815 | 0.9023 | 1.8868 | 0.5120 |
| RAG_BERT_72B | 0.8867 | 0.9286 | 1.5283 | 0.5377 |
| RAG_纯大模型_72B | 0.9245 | 0.9619 | 1.8868 | 0.4783 |
| AutoRAG | 0.9433 | 0.9577 | 1.5472 | 0.4173 |
| InstructRAG | 0.9275 | 0.9296 | 1.6226 | 0.4101 |
| Linked-RAG | 0.9622 | 0.9714 | 1.3774 | 0.5214 |
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| 模型 | Linked-RAG | AutoRAG | InstructRAG | RAG_lora_7B |
|---|
| Linked-RAG | 1.0000 | 0.8983 | 0.7653 | 0.6566 |
| AutoRAG | 0.8983 | 1.0000 | 0.6821 | 0.5726 |
| InstructRAG | 0.7653 | 0.6821 | 1.0000 | 0.4656 |
| RAG_lora_7B | 0.6566 | 0.5726 | 0.4656 | 1.0000 |
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4种RAG的Kappa一致性分析结果
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| 模型 | Linked-RAG | AutoRAG | InstructRAG | RAG_lora_7B |
|---|
| Linked-RAG | 1.0000 | 0.8983 | 0.7653 | 0.6566 |
| AutoRAG | 0.8983 | 1.0000 | 0.6821 | 0.5726 |
| InstructRAG | 0.7653 | 0.6821 | 1.0000 | 0.4656 |
| RAG_lora_7B | 0.6566 | 0.5726 | 0.4656 | 1.0000 |
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| 消融实验 | Recall@5 | 前3正确率 | 判责逻辑数量 |
|---|
| 完整模型 | 0.9622 | 0.5472 | 3.2075 |
| Abl-1(无2级检索) | 0.8301 | — | — |
| Abl-2(无BERT) | — | 0.4528 | — |
| Abl-3(静态匹配) | — | — | 6.6038 |
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展示消融实验对核心指标的影响
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| 消融实验 | Recall@5 | 前3正确率 | 判责逻辑数量 |
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| 完整模型 | 0.9622 | 0.5472 | 3.2075 |
| Abl-1(无2级检索) | 0.8301 | — | — |
| Abl-2(无BERT) | — | 0.4528 | — |
| Abl-3(静态匹配) | — | — | 6.6038 |
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