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arXiv 2102.11090cs.CLcs.AI
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Transformers中的位置信息:综述

Position Information in Transformers: An Overview

Center for Information and Language Processing (CIS), LMU Munich(慕尼黑大学语言与信息处理中心(CIS))

Philipp Dufter, Martin Schmitt, Hinrich Schütze

摘要:

Transformers可以说是最近自然语言处理研究中的主要主力。根据定义,Transformer相对于输入的重新排序是不变的。然而,语言本质上是连续的,词序对话语的语义和句法至关重要。在这篇文章中,我们提供了一个概述和理论比较现有的方法,将位置信息到Transformer模型。本调查的目的是(1)展示Transformer中的位置信息是一个充满活力和广泛的研究领域;(2)通过提供一个统一的符号和系统化的不同方法沿着重要的模型维度,使读者能够比较现有的方法;(3)指出在选择位置编码时应该考虑应用程序的哪些特征;(4)为今后的研究提供动力。

英文摘要:

Transformers are arguably the main workhorse in recent Natural Language Processing research. By definition a Transformer is invariant with respect to reordering of the input. However, language is inherently sequential and word order is essential to the semantics and syntax of an utterance. In this article, we provide an overview and theoretical comparison of existing methods to incorporate position information into Transformer models. The objectives of this survey are to (1) showcase that position information in Transformer is a vibrant and extensive research area; (2) enable the reader to compare existing methods by providing a unified notation and systematization of different approaches along important model dimensions; (3) indicate what characteristics of an application should be taken into account when selecting a position encoding; (4) provide stimuli for future research.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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