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Register a new userCross-lingual Transfer for Text Classification with Dictionary-based Heterogeneous Graph
نقل عبر اللغات لتصنيف النص مع الرسم البياني غير المتجانس القائم في القاموس
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في تصنيف النص عبر اللغات، يطلب من أن البيانات التدريبية الخاصة بمهام المهام في لغات مصدر عالية الموارد متوفرة، حيث تكون المهمة مطابقة لتلك لغة مستهدفة منخفضة الموارد. ومع ذلك، يمكن أن يكون جمع هذه البيانات التدريبية غير ممكنة بسبب تكلفة العلامات وخصائص المهام ومخاوف الخصوصية. تقترح هذه الورقة حل بديل يستخدم فقط تضييق كلمة مهمة من المهام لغات الموارد عالية الموارد وقواميس ثنائية اللغة. أولا، نبني رسم بياني غير متجانس (DHG) من القواميس ثنائية اللغة. هذا يفتح إمكانية استخدام الشبكات العصبية الرسم البيانية للتحويل عبر اللغات. التحدي المتبقي هو عدم تجانس DHG لأنه يتم النظر في لغات متعددة. لمعالجة هذا التحدي، نقترح شبكة عصبية غير متجانسة مقرها القاموس (Dhgnet) التي تعالج بفعالية عدم تجانس DHG بشكل فعال بمقدار تجميعتين، وهي مجامعات على مستوى الكلمة ومستوى اللغة. توضح النتائج التجريبية أن أسلوبنا تفوق النماذج المحددة على الرغم من أنها لا تصل إلى كورسا كبيرة. علاوة على ذلك، يمكن أن يؤدي ذلك بشكل جيد على الرغم من أن القواميس تحتوي على العديد من الترجمات غير الصحيحة. تتيح قوتها لاستخدام مجموعة واسعة من القواميس مثل القاموس المصنوع تلقائيا وقاموس التعيد الجماعي، وهو أمر مناسب لتطبيقات العالم الحقيقي.
In cross-lingual text classification, it is required that task-specific training data in high-resource source languages are available, where the task is identical to that of a low-resource target language. However, collecting such training data can be infeasible because of the labeling cost, task characteristics, and privacy concerns. This paper proposes an alternative solution that uses only task-independent word embeddings of high-resource languages and bilingual dictionaries. First, we construct a dictionary-based heterogeneous graph (DHG) from bilingual dictionaries. This opens the possibility to use graph neural networks for cross-lingual transfer. The remaining challenge is the heterogeneity of DHG because multiple languages are considered. To address this challenge, we propose dictionary-based heterogeneous graph neural network (DHGNet) that effectively handles the heterogeneity of DHG by two-step aggregations, which are word-level and language-level aggregations. Experimental results demonstrate that our method outperforms pretrained models even though it does not access to large corpora. Furthermore, it can perform well even though dictionaries contain many incorrect translations. Its robustness allows the usage of a wider range of dictionaries such as an automatically constructed dictionary and crowdsourced dictionary, which are convenient for real-world applications.
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