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الترجمة الآلية العصبية دون embeddings
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تعمل العديد من نماذج NLP على تسلسل الرموز الرموز الفرعية التي تنتجها قواعد التزخم المصنوعة يدويا وخوارزميات التعريفي للكلمة الفرعية.بديل عالمي بسيط هو تمثيل كل نص محوسب كسلسلة من البايتات عبر UTF-8، وضبط الحاجة إلى طبقة تضمين نظرا لأن هناك عدد أقل من أنواع الرمز المميز (256) من الأبعاد.من المستغرب، استبدال طبقة التضمين في كل مكان بتمثيلات ساخنة لكل بايت لا تؤذي الأداء؛تظهر التجارب في الترجمة الآلية بايت إلى بايت من الإنجليزية إلى 10 لغات مختلفة تحسنا ثابتا في بلو، ومستوى الطابع المتنافس وحتى نماذج مستوى الكلمات الفرعية القياسية.يكشف التحقيق الأعمق أن مزيج من نماذج تضمينه مع ترميز مفاتيح المدخلات بمبالغ الرمز إلى التسرب الرمزي، والذي يفيد نماذج بايت إلى بايت بشكل خاص.
Many NLP models operate over sequences of subword tokens produced by hand-crafted tokenization rules and heuristic subword induction algorithms. A simple universal alternative is to represent every computerized text as a sequence of bytes via UTF-8, obviating the need for an embedding layer since there are fewer token types (256) than dimensions. Surprisingly, replacing the ubiquitous embedding layer with one-hot representations of each byte does not hurt performance; experiments on byte-to-byte machine translation from English to 10 different languages show a consistent improvement in BLEU, rivaling character-level and even standard subword-level models. A deeper investigation reveals that the combination of embeddingless models with decoder-input dropout amounts to token dropout, which benefits byte-to-byte models in particular.
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