تقرير
Learning Easily Updated General Purpose Text Representations with Adaptable Task-Specific Prefixes
العنوان: | Learning Easily Updated General Purpose Text Representations with Adaptable Task-Specific Prefixes |
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المؤلفون: | Huang, Kuan-Hao, Tan, Liang, Hou, Rui, Wang, Sinong, Almahairi, Amjad, Rinott, Ruty |
سنة النشر: | 2023 |
المجموعة: | Computer Science |
مصطلحات موضوعية: | Computer Science - Computation and Language |
الوصف: | Many real-world applications require making multiple predictions from the same text. Fine-tuning a large pre-trained language model for each downstream task causes computational burdens in the inference time due to several times of forward passes. To amortize the computational cost, freezing the language model and building lightweight models for downstream tasks based on fixed text representations are common solutions. Accordingly, how to learn fixed but general text representations that can generalize well to unseen downstream tasks becomes a challenge. Previous works have shown that the generalizability of representations can be improved by fine-tuning the pre-trained language model with some source tasks in a multi-tasking way. In this work, we propose a prefix-based method to learn the fixed text representations with source tasks. We learn a task-specific prefix for each source task independently and combine them to get the final representations. Our experimental results show that prefix-based training performs better than multi-tasking training and can update the text representations at a smaller computational cost than multi-tasking training. Comment: Paper accepted by EMNLP 2023 Findings |
نوع الوثيقة: | Working Paper |
URL الوصول: | http://arxiv.org/abs/2305.13499 |
رقم الأكسشن: | edsarx.2305.13499 |
قاعدة البيانات: | arXiv |
الوصف غير متاح. |