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تحديد خطأ للحصول على الترجمة الآلية مع التضمين المتري والاهتمام
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تبين أن تقدير الجودة (QE) للترجمة الآلية تصل إلى دقة عالية نسبيا في التنبؤ بعشرات على مستوى الجملة، والاعتماد على المدينات السياقية المحددة مسبقا وعشرات الجودة المنتجة للإنسان. ومع ذلك، فإن الافتقار إلى التفسيرات إلى جانب القرارات التي اتخذتها النماذج العصبية نهاية إلى نهاية تجعل النتائج يصعب تفسيرها. علاوة على ذلك، فإن مجموعات البيانات المشروحة على مستوى الكلمات نادرة بسبب الجهد الباهظ المطلوب لإجراء هذه المهمة، في حين أنهم قد يوفرون إشارات قابلة للتفسير بالإضافة إلى مخرجات QE على مستوى الجملة. في هذه الورقة، نقترح هندسة QE الجديدة التي تعالج كل من ندرة البيانات على مستوى الكلمة والقيود التفسيرية للنهج الأخيرة. يتم احترام مكونات مستوى الجملة ومستوى الكلمات بشكل مشترك من خلال آلية اهتمام بناء على البيانات الاصطناعية ومجموعة من مقاييس MT المضمنة في مساحة مشتركة. يتم تقييم نهجنا على المهمة المشتركة ESPR4NLP 2021 وتوصل عمليات التقديمات لدينا إلى المركز الأول في جميع أزواج اللغات. تظهر استخراج أوزان الاهتمام المتراكي إلى المدخلات أن مقاييس مختلفة تركز على أجزاء مختلفة من المصدر والنص المستهدف، مما يوفر منورات تدريبية قوية في عملية صنع القرار لنموذج QE.
Quality Estimation (QE) for Machine Translation has been shown to reach relatively high accuracy in predicting sentence-level scores, relying on pretrained contextual embeddings and human-produced quality scores. However, the lack of explanations along with decisions made by end-to-end neural models makes the results difficult to interpret. Furthermore, word-level annotated datasets are rare due to the prohibitive effort required to perform this task, while they could provide interpretable signals in addition to sentence-level QE outputs. In this paper, we propose a novel QE architecture which tackles both the word-level data scarcity and the interpretability limitations of recent approaches. Sentence-level and word-level components are jointly pretrained through an attention mechanism based on synthetic data and a set of MT metrics embedded in a common space. Our approach is evaluated on the Eval4NLP 2021 shared task and our submissions reach the first position in all language pairs. The extraction of metric-to-input attention weights show that different metrics focus on different parts of the source and target text, providing strong rationales in the decision-making process of the QE model.
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