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تمتد صياغة نماذج اللغة المدربة مسبقا
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يتعين على نماذج اللغة المدربة مسبقا (PRLM) لإدارة وحدات الإدخال بعناية عند التدريب على نص كبير جدا مع مفردات تتكون من ملايين الكلمات. أظهرت الأعمال السابقة أن دمج معلومات المسيح على مستوى الأمان بشأن الكلمات المتتالية في التدريب المسبق يمكن أن تحسن أداء PRLMS. ومع ذلك، بالنظر إلى أن أدلة المسكنات المستفادة مقدمة وإثباتها في التدريب المسبق، فإن الطرق السابقة تستغرق وقتا طويلا ونقص المرونة. لتخفيف الإزعاج، تقدم هذه الورقة طريقة رواية تمتد دقيقة لضبط PRLMS، مما يسهل إعداد SPES يتم تحديده على تكيفه بواسطة مهام معينة من المصب أثناء مرحلة الضبط الجميلة. بالتفصيل، سيتم تجزئة أي جمل تتم معالجتها من قبل PRLM في تمديدات متعددة وفقا لقاموس ما قبل العينات. ثم سيتم إرسال معلومات التجزئة من خلال وحدة CNN الهرمية مع مخرجات التمثيل من PRLM وتولد في نهاية المطاف تمثيلا محسن. تشير التجارب على معيار الغراء إلى أن طريقة ضبط الدقيقة المقترحة تعزز بشكل كبير PRLM، وفي الوقت نفسه، تقدم المزيد من المرونة بطريقة فعالة.
Pre-trained language models (PrLM) have to carefully manage input units when training on a very large text with a vocabulary consisting of millions of words. Previous works have shown that incorporating span-level information over consecutive words in pre-training could further improve the performance of PrLMs. However, given that span-level clues are introduced and fixed in pre-training, previous methods are time-consuming and lack of flexibility. To alleviate the inconvenience, this paper presents a novel span fine-tuning method for PrLMs, which facilitates the span setting to be adaptively determined by specific downstream tasks during the fine-tuning phase. In detail, any sentences processed by the PrLM will be segmented into multiple spans according to a pre-sampled dictionary. Then the segmentation information will be sent through a hierarchical CNN module together with the representation outputs of the PrLM and ultimately generate a span-enhanced representation. Experiments on GLUE benchmark show that the proposed span fine-tuning method significantly enhances the PrLM, and at the same time, offer more flexibility in an efficient way.
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