Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userBidirectional Hierarchical Attention Networks based on Document-level Context for Emotion Cause Extraction
شبكات الاهتمام التسلسل الهرمي ثنائي الاتجاه استنادا إلى سياق مستوى الوثيقة لاستخراج السبب العاطفي
245
0 0
0.0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
يهدف استخراج العاطفة (ECE) إلى استخراج الأسباب وراء المشاعر المعينة في النص. تم نشر بعض الأعمال المتعلقة بمهمة اللجنة الاقتصادية لأوروبا وجذب الكثير من الاهتمام في السنوات الأخيرة. ومع ذلك، فإن هذه الطرق تهمل قضايا رئيسيتين: 1) دفع عدد قليل من الانتباه لتأثير معلومات السياق على مستوى المستند على اللجنة الاقتصادية لأوروبا، و 2) عدم وجود استكشاف كاف لكيفية استخدام بند العاطفة المشروح بفعالية. بالنسبة للقضية الأولى، نقترح شبكة انتباه هرمية ثنائية الاتجاه (BHA) المقابلة للمرشح المحدد يسبب البحث عن سياق مستوى المستند في المستند بطريقة منظمة وديناميكية. بالنسبة للقضية الثانية، نقوم بتصميم وحدة تصفية عاطفية (EF) لكل طبقة من شبكة انتباه الرسوم البيانية، والتي تحسب درجة البوابة بناء على جملة العاطفة لتصفية المعلومات غير ذات الصلة. الجمع بين BHA و EF، يمكن ل EF-BHA أن يكتسب ديناميكيا المعلومات السياقية من اتجاهين وفلاتر المعلومات غير ذات صلة. توضح النتائج التجريبية أن EF-BHA يحقق العروض التنافسية على مجموعة بيانات عامة بلغات مختلفة (الصينية والإنجليزية). علاوة على ذلك، نحدد تأثير السياق على استخراج السبب العاطفي وتوفير تصور التفاعلات بين المرشح يسبب البنود والسياقات.
Emotion cause extraction (ECE) aims to extract the causes behind the certain emotion in text. Some works related to the ECE task have been published and attracted lots of attention in recent years. However, these methods neglect two major issues: 1) pay few attentions to the effect of document-level context information on ECE, and 2) lack of sufficient exploration for how to effectively use the annotated emotion clause. For the first issue, we propose a bidirectional hierarchical attention network (BHA) corresponding to the specified candidate cause clause to capture the document-level context in a structured and dynamic manner. For the second issue, we design an emotional filtering module (EF) for each layer of the graph attention network, which calculates a gate score based on the emotion clause to filter the irrelevant information. Combining the BHA and EF, the EF-BHA can dynamically aggregate the contextual information from two directions and filters irrelevant information. The experimental results demonstrate that EF-BHA achieves the competitive performances on two public datasets in different languages (Chinese and English). Moreover, we quantify the effect of context on emotion cause extraction and provide the visualization of the interactions between candidate cause clauses and contexts.
References used
https://aclanthology.org/
rate research
Read More
We propose a structured extension to bidirectional-context conditional language generation, or infilling,'' inspired by Frame Semantic theory. Guidance is provided through one of two approaches: (1) model fine-tuning, conditioning directly on observe
d symbolic frames, and (2) a novel extension to disjunctive lexically constrained decoding that leverages frame semantic lexical units. Automatic and human evaluations confirm that frame-guided generation allows for explicit manipulation of intended infill semantics, with minimal loss in distinguishability from human-generated text. Our methods flexibly apply to a variety of use scenarios, and we provide an interactive web demo.
Rumor detection on social media puts pre-trained language models (LMs), such as BERT, and auxiliary features, such as comments, into use. However, on the one hand, rumor detection datasets in Chinese companies with comments are rare; on the other han
d, intensive interaction of attention on Transformer-based models like BERT may hinder performance improvement. To alleviate these problems, we build a new Chinese microblog dataset named Weibo20 by collecting posts and associated comments from Sina Weibo and propose a new ensemble named STANKER (Stacking neTwork bAsed-on atteNtion-masKed BERT). STANKER adopts two level-grained attention-masked BERT (LGAM-BERT) models as base encoders. Unlike the original BERT, our new LGAM-BERT model takes comments as important auxiliary features and masks co-attention between posts and comments on lower-layers. Experiments on Weibo20 and three existing social media datasets showed that STANKER outperformed all compared models, especially beating the old state-of-the-art on Weibo dataset.
Document-level event extraction is critical to various natural language processing tasks for providing structured information. Existing approaches by sequential modeling neglect the complex logic structures for long texts. In this paper, we leverage
the entity interactions and sentence interactions within long documents and transform each document into an undirected unweighted graph by exploiting the relationship between sentences. We introduce the Sentence Community to represent each event as a subgraph. Furthermore, our framework SCDEE maintains the ability to extract multiple events by sentence community detection using graph attention networks and alleviate the role overlapping issue by predicting arguments in terms of roles. Experiments demonstrate that our framework achieves competitive results over state-of-the-art methods on the large-scale document-level event extraction dataset.
Document-level relation extraction aims to identify relations between entities in a whole document. Prior efforts to capture long-range dependencies have relied heavily on implicitly powerful representations learned through (graph) neural networks, w
hich makes the model less transparent. To tackle this challenge, in this paper, we propose LogiRE, a novel probabilistic model for document-level relation extraction by learning logic rules. LogiRE treats logic rules as latent variables and consists of two modules: a rule generator and a relation extractor. The rule generator is to generate logic rules potentially contributing to final predictions, and the relation extractor outputs final predictions based on the generated logic rules. Those two modules can be efficiently optimized with the expectation-maximization (EM) algorithm. By introducing logic rules into neural networks, LogiRE can explicitly capture long-range dependencies as well as enjoy better interpretation. Empirical results show that significantly outperforms several strong baselines in terms of relation performance and logical consistency. Our code is available at https://github.com/rudongyu/LogiRE.
Extracting relations across large text spans has been relatively underexplored in NLP, but it is particularly important for high-value domains such as biomedicine, where obtaining high recall of the latest findings is crucial for practical applicatio
ns. Compared to conventional information extraction confined to short text spans, document-level relation extraction faces additional challenges in both inference and learning. Given longer text spans, state-of-the-art neural architectures are less effective and task-specific self-supervision such as distant supervision becomes very noisy. In this paper, we propose decomposing document-level relation extraction into relation detection and argument resolution, taking inspiration from Davidsonian semantics. This enables us to incorporate explicit discourse modeling and leverage modular self-supervision for each sub-problem, which is less noise-prone and can be further refined end-to-end via variational EM. We conduct a thorough evaluation in biomedical machine reading for precision oncology, where cross-paragraph relation mentions are prevalent. Our method outperforms prior state of the art, such as multi-scale learning and graph neural networks, by over 20 absolute F1 points. The gain is particularly pronounced among the most challenging relation instances whose arguments never co-occur in a paragraph.
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
