Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userLow-resource Taxonomy Enrichment with Pretrained Language Models
تخصيص تصنيف التصنيف المنخفض مع نماذج اللغة المحددة مسبقا
474
0 0
0.0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
التصنيفات هي تمثيل رمزي للعلاقات الهرمية بين المصطلحات أو الكيانات. في حين أن التصنيفات مفيدة في تطبيقات واسعة، فإن تحديثها أو الحفاظ عليها يدويا كثيفة العمالة وصعبة الحجم في الممارسة العملية. تفشل الأساليب الإشرافية التقليدية لهذه المهمة التخصيب هذه في العثور على والدي الأمثل للمصطلحات الجديدة في إعدادات الموارد المنخفضة حيث تتوفر تصنيفات صغيرة فقط بسبب التجاوز عن العلاقات الهرمية في التصنيفات. لمعالجة مشكلة تخصيب التصنيف المنخفض للموارد، نقترح Musubu، وهو إطار فعال لإثراء التصنيف في إعدادات الموارد المنخفضة مع نماذج اللغة المحددة مسبقا (LMS) كقواعد المعرفة للتعويض عن نقص المعلومات. يستفيد Musubu مصنف قائم على LM لتحديد ما إذا كان أزواج المصطلح المدبأ أو عدم وجود علاقات هرمية. يستخدم Musubu أيضا أنماطا هارا لتوليد استفسارات للاستفادة من المعرفة الضمنية من LM بكفاءة من أجل التنبؤ الأكثر دقة. إننا نوضح تجريبيا فعالية طريقتنا في تجارب واسعة النطاق بشأن التصنيفات من كل من مهمة Semeval ومجموعات بيانات التجزئة العالمية الحقيقية.
Taxonomies are symbolic representations of hierarchical relationships between terms or entities. While taxonomies are useful in broad applications, manually updating or maintaining them is labor-intensive and difficult to scale in practice. Conventional supervised methods for this enrichment task fail to find optimal parents of new terms in low-resource settings where only small taxonomies are available because of overfitting to hierarchical relationships in the taxonomies. To tackle the problem of low-resource taxonomy enrichment, we propose Musubu, an efficient framework for taxonomy enrichment in low-resource settings with pretrained language models (LMs) as knowledge bases to compensate for the shortage of information. Musubu leverages an LM-based classifier to determine whether or not inputted term pairs have hierarchical relationships. Musubu also utilizes Hearst patterns to generate queries to leverage implicit knowledge from the LM efficiently for more accurate prediction. We empirically demonstrate the effectiveness of our method in extensive experiments on taxonomies from both a SemEval task and real-world retailer datasets.
References used
https://aclanthology.org/
rate research
Read More
To obtain high-quality sentence embeddings from pretrained language models (PLMs), they must either be augmented with additional pretraining objectives or finetuned on a large set of labeled text pairs. While the latter approach typically outperforms
the former, it requires great human effort to generate suitable datasets of sufficient size. In this paper, we show how PLMs can be leveraged to obtain high-quality sentence embeddings without the need for labeled data, finetuning or modifications to the pretraining objective: We utilize the generative abilities of large and high-performing PLMs to generate entire datasets of labeled text pairs from scratch, which we then use for finetuning much smaller and more efficient models. Our fully unsupervised approach outperforms strong baselines on several semantic textual similarity datasets.
Paraphrase generation has benefited extensively from recent progress in the designing of training objectives and model architectures. However, previous explorations have largely focused on supervised methods, which require a large amount of labeled d
ata that is costly to collect. To address this drawback, we adopt a transfer learning approach and propose a training pipeline that enables pre-trained language models to generate high-quality paraphrases in an unsupervised setting. Our recipe consists of task-adaptation, self-supervision, and a novel decoding algorithm named Dynamic Blocking (DB). To enforce a surface form dissimilar from the input, whenever the language model emits a token contained in the source sequence, DB prevents the model from outputting the subsequent source token for the next generation step. We show with automatic and human evaluations that our approach achieves state-of-the-art performance on both the Quora Question Pair (QQP) and the ParaNMT datasets and is robust to domain shift between the two datasets of distinct distributions. We also demonstrate that our model transfers to paraphrasing in other languages without any additional finetuning.
In this paper we present a system that exploits different pre-trained Language Models for assigning domain labels to WordNet synsets without any kind of supervision. Furthermore, the system is not restricted to use a particular set of domain labels.
We exploit the knowledge encoded within different off-the-shelf pre-trained Language Models and task formulations to infer the domain label of a particular WordNet definition. The proposed zero-shot system achieves a new state-of-the-art on the English dataset used in the evaluation.
Large-scale language models (LMs) pretrained on massive corpora of text, such as GPT-2, are powerful open-domain text generators. However, as our systematic examination reveals, it is still challenging for such models to generate coherent long passag
es of text (e.g., 1000 tokens), especially when the models are fine-tuned to the target domain on a small corpus. Previous planning-then-generation methods also fall short of producing such long text in various domains. To overcome the limitations, we propose a simple but effective method of generating text in a progressive manner, inspired by generating images from low to high resolution. Our method first produces domain-specific content keywords and then progressively refines them into complete passages in multiple stages. The simple design allows our approach to take advantage of pretrained LMs at each stage and effectively adapt to any target domain given only a small set of examples. We conduct a comprehensive empirical study with a broad set of evaluation metrics, and show that our approach significantly improves upon the fine-tuned large LMs and various planning-then-generation methods in terms of quality and sample efficiency. Human evaluation also validates that our model generations are more coherent.
Existing work on probing of pretrained language models (LMs) has predominantly focused on sentence-level syntactic tasks. In this paper, we introduce document-level discourse probing to evaluate the ability of pretrained LMs to capture document-level
relations. We experiment with 7 pretrained LMs, 4 languages, and 7 discourse probing tasks, and find BART to be overall the best model at capturing discourse --- but only in its encoder, with BERT performing surprisingly well as the baseline model. Across the different models, there are substantial differences in which layers best capture discourse information, and large disparities between models.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
