Pre-trained Models for Natural Language Processing: A Survey
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Abstract (arXiv)
Recently, the emergence of pre-trained models (PTMs) has brought natural language processing (NLP) to a new era. In this survey, we provide a comprehensive review of PTMs for NLP. We first briefly introduce language representation learning and its research progress. Then we systematically categorize existing PTMs based on a taxonomy with four perspectives. Next, we describe how to adapt the knowledge of PTMs to the downstream tasks. Finally, we outline some potential directions of PTMs for future research. This survey is purposed to be a hands-on guide for understanding, using, and developing PTMs for various NLP tasks.
Key facts. Cited by 504 papers in the map (data through 7 Oct 2026). First posted on arXiv 18 Mar 2020.
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Citing papers per year: 2021: 82; 2022: 128; 2023: 139; 2024: 88; 2025: 44; 2026: 23.
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