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Zizhen Wang

5 accepted papers

2024

LG-GNN: Local-Global Adaptive Graph Neural Network for Modeling Both Homophily and Heterophily

IJCAI 2024poster

Most Graph Neural Networks (GNNs) are based on the homophily assumption, where nodes with the same labels or similar features tend to be connected to each other. However, real-world graphs often do not adhere to this homophily assumption. Currently, most researches aggregate multi-hop neighbor infor…

Cited by 6SourcePDFScholar
2022

A Re-Balancing Strategy for Class-Imbalanced Classification Based on Instance Difficulty

CVPR 2022poster

Real-world data often exhibits class-imbalanced distributions, where a few classes (a.k.a. majority classes) occupy most instances and lots of classes (a.k.a. minority classes) have few instances. Neural classification models usually perform poorly on minority classes when training on such imbalance…

Cited by 44PDFScholar
2022

DialogUSR: Complex Dialogue Utterance Splitting and Reformulation for Multiple Intent Detection

EMNLP 2022finding

While interacting with chatbots, users may elicit multiple intents in a single dialogue utterance. Instead of training a dedicated multi-intent detection model, we propose DialogUSR, a dialogue utterance splitting and reformulation task that first splits multi-intent user query into several single-i…

2022

The Past Mistake is the Future Wisdom: Error-driven Contrastive Probability Optimization for Chinese Spell Checking

ACL 2022findings

Chinese Spell Checking (CSC) aims to detect and correct Chinese spelling errors, which are mainly caused by the phonological or visual similarity. Recently, pre-trained language models (PLMs) promote the progress of CSC task. However, there exists a gap between the learned knowledge of PLMs and the…