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Guimin Chen

5 accepted papers

2021

Aspect-based Sentiment Analysis with Type-aware Graph Convolutional Networks and Layer Ensemble

NAACL 2021long

It is popular that neural graph-based models are applied in existing aspect-based sentiment analysis (ABSA) studies for utilizing word relations through dependency parses to facilitate the task with better semantic guidance for analyzing context and aspect words. However, most of these studies only…

2021

Dependency-driven Relation Extraction with Attentive Graph Convolutional Networks

ACL 2021long

Syntactic information, especially dependency trees, has been widely used by existing studies to improve relation extraction with better semantic guidance for analyzing the context information associated with the given entities. However, most existing studies suffer from the noise in the dependency t…

2021

Improving Arabic Diacritization with Regularized Decoding and Adversarial Training

ACL 2021short

Arabic diacritization is a fundamental task for Arabic language processing. Previous studies have demonstrated that automatically generated knowledge can be helpful to this task. However, these studies regard the auto-generated knowledge instances as gold references, which limits their effectiveness…

2021

Improving Federated Learning for Aspect-based Sentiment Analysis via Topic Memories

EMNLP 2021main

Aspect-based sentiment analysis (ABSA) predicts the sentiment polarity towards a particular aspect term in a sentence, which is an important task in real-world applications. To perform ABSA, the trained model is required to have a good understanding of the contextual information, especially the part…

2020

Joint Aspect Extraction and Sentiment Analysis with Directional Graph Convolutional Networks

COLING 2020main

End-to-end aspect-based sentiment analysis (EASA) consists of two sub-tasks: the first extracts the aspect terms in a sentence and the second predicts the sentiment polarities for such terms. For EASA, compared to pipeline and multi-task approaches, joint aspect extraction and sentiment analysis pro…