Search Results for author: Zhen Wu

Found 17 papers, 11 papers with code

Learning from Adjective-Noun Pairs: A Knowledge-enhanced Framework for Target-Oriented Multimodal Sentiment Classification

1 code implementation COLING 2022 Fei Zhao, Zhen Wu, Siyu Long, Xinyu Dai, ShuJian Huang, Jiajun Chen

Target-oriented multimodal sentiment classification (TMSC) is a new subtask of aspect-based sentiment analysis, which aims to determine the sentiment polarity of the opinion target mentioned in a (sentence, image) pair.

Aspect-Based Sentiment Analysis

Towards Multi-label Unknown Intent Detection

1 code implementation COLING 2022 Yawen Ouyang, Zhen Wu, Xinyu Dai, ShuJian Huang, Jiajun Chen

In this paper, we propose a more desirable task, multi-label unknown intent detection, to detect whether the utterance contains the unknown intent, in which each utterance may contain multiple intents.

Intent Detection

Label-Driven Denoising Framework for Multi-Label Few-Shot Aspect Category Detection

1 code implementation9 Oct 2022 Fei Zhao, Yuchen Shen, Zhen Wu, Xinyu Dai

Multi-Label Few-Shot Aspect Category Detection (FS-ACD) is a new sub-task of aspect-based sentiment analysis, which aims to detect aspect categories accurately with limited training instances.

Aspect-Based Sentiment Analysis Aspect Category Detection +1

Margin Calibration for Long-Tailed Visual Recognition

no code implementations14 Dec 2021 Yidong Wang, BoWen Zhang, Wenxin Hou, Zhen Wu, Jindong Wang, Takahiro Shinozaki

The long-tailed class distribution in visual recognition tasks poses great challenges for neural networks on how to handle the biased predictions between head and tail classes, i. e., the model tends to classify tail classes as head classes.

Opinion Transmission Network for Jointly Improving Aspect-oriented Opinion Words Extraction and Sentiment Classification

no code implementations1 Nov 2020 Chengcan Ying, Zhen Wu, Xinyu Dai, ShuJian Huang, Jiajun Chen

In this paper, we propose a novel joint model, Opinion Transmission Network (OTN), to exploit the potential bridge between ALSC and AOWE to achieve the goal of facilitating them simultaneously.

Aspect-Based Sentiment Analysis General Classification

Transformer-based Multi-Aspect Modeling for Multi-Aspect Multi-Sentiment Analysis

no code implementations1 Nov 2020 Zhen Wu, Chengcan Ying, Xinyu Dai, ShuJian Huang, Jiajun Chen

To facilitate the research of ABSA, NLPCC 2020 Shared Task 2 releases a new large-scale Multi-Aspect Multi-Sentiment (MAMS) dataset.

Aspect-Based Sentiment Analysis

Attention Transfer Network for Aspect-level Sentiment Classification

1 code implementation COLING 2020 Fei Zhao, Zhen Wu, Xinyu Dai

In neural network-based methods for ASC, most works employ the attention mechanism to capture the corresponding sentiment words of the opinion target, then aggregate them as evidence to infer the sentiment of the target.

Classification General Classification +1

Grid Tagging Scheme for Aspect-oriented Fine-grained Opinion Extraction

3 code implementations Findings of the Association for Computational Linguistics 2020 Zhen Wu, Chengcan Ying, Fei Zhao, Zhifang Fan, Xinyu Dai, Rui Xia

To validate the feasibility and compatibility of GTS, we implement three different GTS models respectively based on CNN, BiLSTM, and BERT, and conduct experiments on the aspect-oriented opinion pair extraction and opinion triplet extraction datasets.

Aspect-Sentiment-Opinion Triplet Extraction Aspect Sentiment Triplet Extraction

Dynamic Programming Principle for Backward Doubly Stochastic Recursive Optimal Control Problem and Sobolev Weak Solution of The Stochastic Hamilton-Bellman Equation

no code implementations12 Aug 2020 Yunhong Li, Anis. Matoussi, Lifeng Wei, Zhen Wu

In this paper, we study backward doubly stochastic recursive optimal control problem where the cost function is described by the solution of a backward doubly stochastic differential equation.

Probability Optimization and Control

Latent Opinions Transfer Network for Target-Oriented Opinion Words Extraction

1 code implementation7 Jan 2020 Zhen Wu, Fei Zhao, Xin-yu Dai, Shu-Jian Huang, Jia-Jun Chen

In this paper, we propose a novel model to transfer these opinions knowledge from resource-rich review sentiment classification datasets to low-resource task TOWE.

Aspect-oriented Opinion Extraction General Classification +1

Target-oriented Opinion Words Extraction with Target-fused Neural Sequence Labeling

1 code implementation NAACL 2019 Zhifang Fan, Zhen Wu, Xin-yu Dai, Shu-Jian Huang, Jia-Jun Chen

In this paper, we propose a novel sequence labeling subtask for ABSA named TOWE (Target-oriented Opinion Words Extraction), which aims at extracting the corresponding opinion words for a given opinion target.

Aspect-oriented Opinion Extraction target-oriented opinion words extraction

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