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Register a new userCrosslingual Transfer Learning for Relation and Event Extraction via Word Category and Class Alignments
التعلم تحويل التعلم عن العلاقة واستخراج الأحداث عبر فئة Word ومحاذاة الفصل
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يعاني العمل السابق على علاقة Crosslingual واستخراج الأحداث (REE) من قضية التحيز أحادي الأحادي بسبب تدريب النماذج على بيانات اللغة المصدر فقط. تتمثل نهج التغلب على هذه المسألة في استخدام البيانات غير المستهلكة في اللغة المستهدفة لمساعدة محاذاة تمثيلات crosslingual، أي عن طريق خداع تمييز لغة. ومع ذلك، نظرا لأن هذا النهج غير بشرط على معلومات الفصل، فإن مثال لغوي مستهدف يمكن أن يتماشى بشكل غير صحيح إلى مثال لغة مصدر لفئة مختلفة. لمعالجة هذه المشكلة، نقترح طريقة محاذاة Crosslingual الجديدة التي ترفد معلومات الفئة من مهام REE لتعلم التمثيل. على وجه الخصوص، نقترح تعلم نسختين من ناقلات التمثيل لكل فصل في مهمة ري بناء على أمثلة اللغة أو الهدف المستهدف. سيتم بعد ذلك محاذاة ناقلات التمثيل للفصول المقابلة لتحقيق محاذاة علم الفئة للتمثيلات crosslingual. بالإضافة إلى ذلك، نقترح مواصلة مواءمة مقالات التمثيل لفئات الكلمات العالمية للألوج (أي أجزاء من العلاقات بين الكلام والاعتماد). على هذا النحو، يتم تقديم آلية تصفية جديدة لتسهيل تعلم تمثيلات فئة Word من تمثيلات السياق على نصوص الإدخال بناء على التعلم المشددي. نقوم بإجراء تجارب متشددة واسعة النطاق مع اللغة الإنجليزية والصينية والعربية على مهام ري. توضح النتائج فوائد الطريقة المقترحة التي تقدم بشكل كبير الأداء الحديث في هذه الإعدادات.
Previous work on crosslingual Relation and Event Extraction (REE) suffers from the monolingual bias issue due to the training of models on only the source language data. An approach to overcome this issue is to use unlabeled data in the target language to aid the alignment of crosslingual representations, i.e., via fooling a language discriminator. However, as this approach does not condition on class information, a target language example of a class could be incorrectly aligned to a source language example of a different class. To address this issue, we propose a novel crosslingual alignment method that leverages class information of REE tasks for representation learning. In particular, we propose to learn two versions of representation vectors for each class in an REE task based on either source or target language examples. Representation vectors for corresponding classes will then be aligned to achieve class-aware alignment for crosslingual representations. In addition, we propose to further align representation vectors for language-universal word categories (i.e., parts of speech and dependency relations). As such, a novel filtering mechanism is presented to facilitate the learning of word category representations from contextualized representations on input texts based on adversarial learning. We conduct extensive crosslingual experiments with English, Chinese, and Arabic over REE tasks. The results demonstrate the benefits of the proposed method that significantly advances the state-of-the-art performance in these settings.
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