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Register a new userUnsupervised Relation Extraction: A Variational Autoencoder Approach
استخراج العلاقات غير المدعومة: نهج اختلاف السيارات
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استخراج العلاقات غير المدعومة من قبل أزواج كيان التجمع التي لها نفس العلاقات في النص. تقوم بعض الأساليب المتنوعة (VAE) المتنوعة (VAE) بتدريب نموذج استخراج العلاقة كترفيه يولد تصنيفات العلاقة. يتم تدريب وحدة فك الترميز جنبا إلى جنب مع التشفير لإعادة بناء إدخال التشفير بناء على تصنيفات العلاقة التي يتم إنشاؤها المشن. هذه التصنيفات هي متغير كامن حتى يطلب منهم اتباع توزيع مسبق محدد مسبقا يؤدي إلى تدريب غير مستقر. نقترح تقنية استخراج العلاقات التي تعتمد عليها VAE تقوم بتغيير هذا القيد باستخدام التصنيفات كمتغير متوسط بدلا من متغير كامن. على وجه التحديد، تكون التصنيفات مشروطة بإدخال الجملة، في حين أن المتغير الكامن مشروط على كل من التصنيفات وإدخال الجملة. يتيح ذلك نموذجنا لتوصيل وحدة فك الترميز مع التشفير دون وضع قيود على توزيع التصنيف؛ الذي يحسن استقرار التدريب. يتم تقييم نهجنا على بيانات DataSet NYT وتفوق الطرق الحديثة.
Unsupervised relation extraction works by clustering entity pairs that have the same relations in the text. Some existing variational autoencoder (VAE)-based approaches train the relation extraction model as an encoder that generates relation classifications. A decoder is trained along with the encoder to reconstruct the encoder input based on the encoder-generated relation classifications. These classifications are a latent variable so they are required to follow a pre-defined prior distribution which results in unstable training. We propose a VAE-based unsupervised relation extraction technique that overcomes this limitation by using the classifications as an intermediate variable instead of a latent variable. Specifically, classifications are conditioned on sentence input, while the latent variable is conditioned on both the classifications and the sentence input. This allows our model to connect the decoder with the encoder without putting restrictions on the classification distribution; which improves training stability. Our approach is evaluated on the NYT dataset and outperforms state-of-the-art methods.
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