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Register a new userSeed Words Based Data Selection for Language Model Adaptation
كلمات البذور تستند إلى اختيار البيانات للتكيف نموذج اللغة
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نحن نتطلع إلى مشكلة تخصيص نموذج اللغة في التطبيقات التي يحتاجها مكون ASR إلى إدارة المصطلحات الخاصة بالمجال؛ على الرغم من أن تقنية التعرف على الكلام الحالية من أحدث توفر نتائج ممتازة للمجالات العامة، فإن التكيف مع القواميس أو المعانلات المتخصصة لا تزال مسألة مفتوحة. في هذا العمل، نقدم نهجا لتحسين الجمل تلقائيا، من كوربوس النص، والتي تطابق، كلاهما دلالة ومورفولوجية، مسرد المصطلحات (الكلمات أو الكلمات المركبة) المقدمة من قبل المستخدم. الهدف النهائي هو التكيف بسرعة نموذج اللغة لنظام ASR الهجين مع كمية محدودة من البيانات النصية داخل المجال من أجل التعامل بنجاح مع المجال اللغوي في متناول اليد؛ يتم توسيع مفردات النموذج الأساسي ومصممة خصيصا، مما يقلل من معدل OOV الناتج. يتم تقديم استراتيجيات اختيار البيانات القائمة على البذور المورفولوجية الضحلة والتوجيه الدلالي عبر Word2VEC ومناقشتها؛ يتكون الإعداد التجريبي في سيناريو تفسير في وقت واحد، حيث تم تصميم ASRS في ثلاث لغات للتعرف على شروط DomainSpecific (I.E. DENTITY). تظهر النتائج باستخدام مقاييس مختلفة (معدل OOV، WER، الدقة والتذكر) فعالية التقنيات المقترحة.
We address the problem of language model customization in applications where the ASR component needs to manage domain-specific terminology; although current state-of-the-art speech recognition technology provides excellent results for generic domains, the adaptation to specialized dictionaries or glossaries is still an open issue. In this work we present an approach for automatically selecting sentences, from a text corpus, that match, both semantically and morphologically, a glossary of terms (words or composite words) furnished by the user. The final goal is to rapidly adapt the language model of an hybrid ASR system with a limited amount of in-domain text data in order to successfully cope with the linguistic domain at hand; the vocabulary of the baseline model is expanded and tailored, reducing the resulting OOV rate. Data selection strategies based on shallow morphological seeds and semantic similarity via word2vec are introduced and discussed; the experimental setting consists in a simultaneous interpreting scenario, where ASRs in three languages are designed to recognize the domainspecific terms (i.e. dentistry). Results using different metrics (OOV rate, WER, precision and recall) show the effectiveness of the proposed techniques.
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Transformers that are pre-trained on multilingual corpora, such as, mBERT and XLM-RoBERTa, have achieved impressive cross-lingual transfer capabilities. In the zero-shot transfer setting, only English training data is used, and the fine-tuned model i
s evaluated on another target language. While this works surprisingly well, substantial variance has been observed in target language performance between different fine-tuning runs, and in the zero-shot setup, no target-language development data is available to select among multiple fine-tuned models. Prior work has relied on English dev data to select among models that are fine-tuned with different learning rates, number of steps and other hyperparameters, often resulting in suboptimal choices. In this paper, we show that it is possible to select consistently better models when small amounts of annotated data are available in auxiliary pivot languages. We propose a machine learning approach to model selection that uses the fine-tuned model's own internal representations to predict its cross-lingual capabilities. In extensive experiments we find that this method consistently selects better models than English validation data across twenty five languages (including eight low-resource languages), and often achieves results that are comparable to model selection using target language development data.
Weakly-supervised text classification aims to induce text classifiers from only a few user-provided seed words. The vast majority of previous work assumes high-quality seed words are given. However, the expert-annotated seed words are sometimes non-t
rivial to come up with. Furthermore, in the weakly-supervised learning setting, we do not have any labeled document to measure the seed words' efficacy, making the seed word selection process a walk in the dark''. In this work, we remove the need for expert-curated seed words by first mining (noisy) candidate seed words associated with the category names. We then train interim models with individual candidate seed words. Lastly, we estimate the interim models' error rate in an unsupervised manner. The seed words that yield the lowest estimated error rates are added to the final seed word set. A comprehensive evaluation of six binary classification tasks on four popular datasets demonstrates that the proposed method outperforms a baseline using only category name seed words and obtained comparable performance as a counterpart using expert-annotated seed words.
This paper considers the unsupervised domain adaptation problem for neural machine translation (NMT), where we assume the access to only monolingual text in either the source or target language in the new domain. We propose a cross-lingual data selec
tion method to extract in-domain sentences in the missing language side from a large generic monolingual corpus. Our proposed method trains an adaptive layer on top of multilingual BERT by contrastive learning to align the representation between the source and target language. This then enables the transferability of the domain classifier between the languages in a zero-shot manner. Once the in-domain data is detected by the classifier, the NMT model is then adapted to the new domain by jointly learning translation and domain discrimination tasks. We evaluate our cross-lingual data selection method on NMT across five diverse domains in three language pairs, as well as a real-world scenario of translation for COVID-19. The results show that our proposed method outperforms other selection baselines up to +1.5 BLEU score.
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This paper describes the model built for the SIGTYP 2021 Shared Task aimed at identifying 18 typologically different languages from speech recordings. Mel-frequency cepstral coefficients derived from audio files are transformed into spectrograms, whi
ch are then fed into a ResNet-50-based CNN architecture. The final model achieved validation and test accuracies of 0.73 and 0.53, respectively.
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