A Two-Stage Boundary-Enhanced contrastive learning approach for nested named entity recognition

Y Liu, K Zhang, R Tong, C Cai, D Chen, X Wu - Expert Systems with …, 2025 - Elsevier
Abstract In Natural Language Processing (NLP), entities often contain other entities.
However, most current Named Entity Recognition (NER) methods can only recognize flat …

Difinet: Boundary-aware semantic differentiation and filtration network for nested named entity recognition

Y Cai, Q Liu, Y Gan, R Lin, C Li, X Liu… - Proceedings of the …, 2024 - aclanthology.org
Abstract Nested Named Entity Recognition (Nested NER) entails identifying and classifying
entity spans within the text, including the detection of named entities that are embedded …

[PDF][PDF] Nested named entity recognition using multilayer BERT-based model

H Rehana, B Bansal, NB Çam, J Zheng, Y He… - CLEF Working …, 2024 - ceur-ws.org
In natural language processing, named entity recognition (NER) is a crucial task involving
finding and categorizing text entities. The biomedical domain presents substantial hurdles …

[HTML][HTML] Span-prototype graph based on graph attention network for nested named entity recognition

J Mu, J Ouyang, Y Yao, Z Ren - Electronics, 2023 - mdpi.com
Named entity recognition, a fundamental task in natural language processing, faces
challenges related to the sequence labeling framework widely used when dealing with …

[PDF][PDF] Advances in Named Entity Recognition: Exploring State-Of-The-Art Methods

SM Hashim, KM Karaoglan - Proc. Int. Halich Congr …, 2024 - researchgate.net
ABSTRACT Named Entity Recognition (NER) is all about deciphering and categorizing
named entities in open-domain text. Recently, it has been grabbing considerable interest …

Bi-directional context-aware network for the nested named entity recognition

Y Li, N Liao, H Yan, Y Zhang, X Wang - Scientific Reports, 2024 - nature.com
The Span-based model can effectively capture the complex entity structure in the text, thus
becoming the mainstream model for nested named entity recognition (Nested NER) tasks …

[PDF][PDF] Chinese Event Trigger Recommendation Model for High-Accuracy Applications

J Duan, X Zhang - Preprints, 2024 - preprints.org
Event detection provides a crucial foundation for intelligent text analysis and supports
numerous downstream applications. However, existing detection models often fail to meet …