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Past vocabulary learning techniques identify relevant vocabulary before training, relying on statistical and entropy-based assumptions that largely neglect the role of model training. Empirically, we observe that trained translation models…

计算与语言 · 计算机科学 2025-04-02 Pin-Jie Lin , Ernie Chang , Yangyang Shi , Vikas Chandra

Neural machine translation, a recently proposed approach to machine translation based purely on neural networks, has shown promising results compared to the existing approaches such as phrase-based statistical machine translation. Despite…

计算与语言 · 计算机科学 2015-03-19 Sébastien Jean , Kyunghyun Cho , Roland Memisevic , Yoshua Bengio

The effectiveness of Neural Machine Translation (NMT) models largely depends on the vocabulary used at training; small vocabularies can lead to out-of-vocabulary problems -- large ones, to memory issues. Subword (SW) tokenization has been…

计算与语言 · 计算机科学 2023-03-02 J. Pourmostafa Roshan Sharami , D. Shterionov , P. Spronck

In order to capture rich language phenomena, neural machine translation models have to use a large vocabulary size, which requires high computing time and large memory usage. In this paper, we alleviate this issue by introducing a…

计算与语言 · 计算机科学 2016-08-02 Haitao Mi , Zhiguo Wang , Abe Ittycheriah

Linguistic resources such as part-of-speech (POS) tags have been extensively used in statistical machine translation (SMT) frameworks and have yielded better performances. However, usage of such linguistic annotations in neural machine…

计算与语言 · 计算机科学 2017-08-04 Jan Niehues , Eunah Cho

We cast neural machine translation (NMT) as a classification task in an autoregressive setting and analyze the limitations of both classification and autoregression components. Classifiers are known to perform better with balanced class…

计算与语言 · 计算机科学 2021-04-06 Thamme Gowda , Jonathan May

Classical translation models constrain the space of possible outputs by selecting a subset of translation rules based on the input sentence. Recent work on improving the efficiency of neural translation models adopted a similar strategy by…

计算与语言 · 计算机科学 2016-10-04 Gurvan L'Hostis , David Grangier , Michael Auli

Neural language models are often trained with maximum likelihood estimation (MLE), where the next word is generated conditioned on the ground-truth word tokens. During testing, however, the model is instead conditioned on previously…

Preference learning in Large Language Models (LLMs) has advanced significantly, yet existing methods remain limited by modest performance gains, high computational costs, hyperparameter sensitivity, and insufficient modeling of global…

计算与语言 · 计算机科学 2026-04-03 Liang Zhu , Yuelin Bai , Xiankun Ren , Jiaxi Yang , Lei Zhang , Feiteng Fang , Hamid Alinejad-Rokny , Minghuan Tan , Min Yang

Neural machine translation (NMT), a new approach to machine translation, has achieved promising results comparable to those of traditional approaches such as statistical machine translation (SMT). Despite its recent success, NMT cannot…

计算与语言 · 计算机科学 2017-09-07 Zi Long , Ryuichiro Kimura , Takehito Utsuro , Tomoharu Mitsuhashi , Mikio Yamamoto

The basic concept in Neural Machine Translation (NMT) is to train a large Neural Network that maximizes the translation performance on a given parallel corpus. NMT is then using a simple left-to-right beam-search decoder to generate new…

计算与语言 · 计算机科学 2018-12-19 Markus Freitag , Yaser Al-Onaizan

Transfer learning or multilingual model is essential for low-resource neural machine translation (NMT), but the applicability is limited to cognate languages by sharing their vocabularies. This paper shows effective techniques to transfer a…

计算与语言 · 计算机科学 2019-06-06 Yunsu Kim , Yingbo Gao , Hermann Ney

The necessity of using a fixed-size word vocabulary in order to control the model complexity in state-of-the-art neural machine translation (NMT) systems is an important bottleneck on performance, especially for morphologically rich…

计算与语言 · 计算机科学 2017-08-01 Duygu Ataman , Matteo Negri , Marco Turchi , Marcello Federico

Large Language Models (LLMs) have excelled in various tasks but perform better in high-resource scenarios, which presents challenges in low-resource scenarios. Data scarcity and the inherent difficulty of adapting LLMs to specific tasks…

计算与语言 · 计算机科学 2024-04-02 Yuanhao Zeng , Min Wang , Yihang Wang , Yingxia Shao

Modern language models rely on static vocabularies, fixed before pretraining, in contrast to the adaptive vocabulary acquisition observed in human language learning. To bridge this gap, we introduce vocabulary curriculum learning, an…

计算与语言 · 计算机科学 2025-02-26 Fangyuan Yu

We propose a method to transfer knowledge across neural machine translation (NMT) models by means of a shared dynamic vocabulary. Our approach allows to extend an initial model for a given language pair to cover new languages by adapting…

计算与语言 · 计算机科学 2018-11-06 Surafel M. Lakew , Aliia Erofeeva , Matteo Negri , Marcello Federico , Marco Turchi

We address for the first time unsupervised training for a translation task with hundreds of thousands of vocabulary words. We scale up the expectation-maximization (EM) algorithm to learn a large translation table without any parallel text…

计算与语言 · 计算机科学 2019-01-08 Yunsu Kim , Julian Schamper , Hermann Ney

Machine translation models have discrete vocabularies and commonly use subword segmentation techniques to achieve an 'open vocabulary.' This approach relies on consistent and correct underlying unicode sequences, and makes models…

计算与语言 · 计算机科学 2021-12-13 Elizabeth Salesky , David Etter , Matt Post

Adding linguistic information (syntax or semantics) to neural machine translation (NMT) has mostly focused on using point estimates from pre-trained models. Directly using the capacity of massive pre-trained contextual word embedding models…

计算与语言 · 计算机科学 2021-04-08 Hassan S. Shavarani , Anoop Sarkar

Applying Reinforcement learning (RL) following maximum likelihood estimation (MLE) pre-training is a versatile method for enhancing neural machine translation (NMT) performance. However, recent work has argued that the gains produced by RL…

计算与语言 · 计算机科学 2022-10-07 Asaf Yehudai , Leshem Choshen , Lior Fox , Omri Abend
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