对比阿拉伯语隐式观点识别中本地知识图谱与跨语言知识图谱的优劣。
Language-Specific versus Cross-Lingual Knowledge Graphs for Implicit Aspect Identification in Arabic: A Comparative Study of Reasoning and Adaptation Strategies

- 用本地阿拉伯语知识图谱替代英文跨语言图谱,提升隐式观点识别效果。
- 任务微调使大模型在显式提取上准确率从不足0.13提升至0.76。
- 对形态丰富的阿拉伯语而言,任务适配比模型规模更重要。
阿拉伯语方面级情感分析需识别明示和隐示观点,后者常依赖辅助知识源(如知识图谱)将情感线索关联至观点类别。对于低资源语言,研究者面临选择:使用成熟英语知识图谱通过多语言嵌入复用,或构建小型本地阿拉伯语知识图谱。本文在统一混合流程中对两种策略进行受控对比,评估三个阿拉伯语基准(M-ABSA、SemEval-2016 Arabic、HAAD)。进一步比较生成提取器的两种适配策略:零样本提示与80亿参数大模型的任务微调。结果表明,本地阿拉伯语知识图谱(策略2)在M-ABSA上比跨语言英语知识图谱(策略1)提升+0.199 micro-F1,SemEval-2016上提升+0.251,精度与召回均更高。任务微调使显式提取micro-F1从≤0.13(零样本)提升至M-ABSA和SemEval-2016上的0.66–0.76(HAAD为0.45),证实任务适配在形态丰富的语言中起决定性作用。
原文摘要 · Abstract (English)
Aspect-based sentiment analysis (ABSA) in Arabic must recover both explicitly stated aspects and implicit aspects that are never named in the text. Implicit identification typically relies on an auxiliary knowledge source (e.g., a knowledge graph (KG)) linking opinion cues to aspect categories, but for a lower-resource language the practitioner faces a design choice: reuse a mature English KG through multilingual embeddings, or build a smaller native Arabic KG. This paper reports a controlled comparison of the two strategies within a single hybrid pipeline, evaluated on three Arabic benchmarks (M-ABSA, SemEval-2016 Arabic, and HAAD). We further compare two adaptation strategies for the generative extractor that feeds the KG -- zero-shot prompting versus task-specific fine-tuning of an 8B-parameter large language model (LLM). The native Arabic KG (Strategy 2) outperforms the cross-lingual English KG (Strategy 1) by +0.199 micro-F1 on M-ABSA and +0.251 on SemEval-2016, gaining on both precision and recall. Task-specific fine-tuning raises explicit-extraction micro-F1 from <= 0.13 (zero-shot) to 0.66-0.76 on M-ABSA and SemEval-2016 (0.45 on the smaller HAAD), confirming that task adaptation, rather than model scale, is decisive in a morphologically rich language.
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