用注意力移植让大模型跨域学表格数据,无需提示词和共享特征。
LATTLE: LLM Attention Transplant for Transfer Learning of Tabular Data Across Disparate Domains
- 通过移植LLM注意力权重实现跨域表格数据迁移。
- 在10组不同数据集上超越12种基线方法,效果显著。
- 适合低资源环境下表格数据的高效迁移学习。
表格数据的迁移学习因领域间特征空间差异大而困难,与图像、文本的同质结构不同。大语言模型(LLMs)虽可提供知识支持,但受限于主观文本提示和上下文学习的计算开销,性能常停滞不前。本文提出一种新型语言到表格的上下文学习方法——LATTLE,利用特定注意力的Transformer权重,实现不同表格数据集间的无缝迁移。该注意力移植机制使迁移学习具备领域无关性,无需表间共享特征、无需提示工程,也无需大规模预训练模型。在10对独立源-目标数据集及12种基线方法上的实验表明,所提方法在传统机器学习模型、先进深度表格架构,以及训练于数千至数十亿样本的模型中均表现更优。跨域注意力迁移为在低资源环境下适配LLM学习非文本表格数据提供了有效方案。LATTLE代码已公开。
原文摘要 · Abstract (English)
Transfer learning on tabular data is challenging due to disparate feature spaces across domains, in contrast to the homogeneous structures of image and text. Large language models (LLMs) offer a knowledge base to improve the limited effectiveness of cross-domain transfer learning for tabular data. However, LLM performance often stagnates due to subjective text prompts and the computational limitations of in-context learning. We present a novel language-to-tabular context-learning method that uses attention-specific transformer weights, enabling seamless transfer learning across disparate tabular data sets. The LLM attention transplant mechanism facilitates a domain-agnostic transfer learning, eliminating the need for shared features between tables, LLM prompt engineering, and large-scale pretrained models. Our experiments using ten pairs of disjoint source-target data sets and 12 baseline methods demonstrate the superiority of the proposed LLM-attention transplant for transfer learning (LATTLE) method over traditional ML models, state-of-the-art deep tabular architectures, and models trained on thousands to billions of tabular samples. The proposed cross-domain attention transfer demonstrates an effective solution for adapting LLMs to learning non-text tabular data in a low-resource environment. The source code of the LATTLE implementation is publicly available.
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