Search Results for author: Junran Wu

Found 11 papers, 8 papers with code

Do LLMs Understand Visual Anomalies? Uncovering LLM Capabilities in Zero-shot Anomaly Detection

no code implementations15 Apr 2024 Jiaqi Zhu, Shaofeng Cai, Fang Deng, Junran Wu

However, existing approaches depend on static anomaly prompts that are prone to cross-semantic ambiguity, and prioritize global image-level representations over crucial local pixel-level image-to-text alignment that is necessary for accurate anomaly localization.

Anomaly Detection Language Modelling +2

HILL: Hierarchy-aware Information Lossless Contrastive Learning for Hierarchical Text Classification

1 code implementation26 Mar 2024 He Zhu, Junran Wu, Ruomei Liu, Yue Hou, Ze Yuan, Shangzhe Li, YiCheng Pan, Ke Xu

Existing self-supervised methods in natural language processing (NLP), especially hierarchical text classification (HTC), mainly focus on self-supervised contrastive learning, extremely relying on human-designed augmentation rules to generate contrastive samples, which can potentially corrupt or distort the original information.

Contrastive Learning Document Embedding +2

The Impact of Customer Online Satisfaction on Stock Returns: Evidence from the E-commerce Reviews in China

no code implementations21 Jun 2023 Zhi Su, Danni Wu, Zhenkun Zhou, Junran Wu, Libo Yin

This paper investigates the significance of consumer opinions in relation to value in China's A-share market.

HiTIN: Hierarchy-aware Tree Isomorphism Network for Hierarchical Text Classification

1 code implementation24 May 2023 He Zhu, Chong Zhang, JunJie Huang, Junran Wu, Ke Xu

Hierarchical text classification (HTC) is a challenging subtask of multi-label classification as the labels form a complex hierarchical structure.

Multi-Label Classification text-classification +1

SEGA: Structural Entropy Guided Anchor View for Graph Contrastive Learning

1 code implementation8 May 2023 Junran Wu, Xueyuan Chen, Bowen Shi, Shangzhe Li, Ke Xu

In contrastive learning, the choice of ``view'' controls the information that the representation captures and influences the performance of the model.

Contrastive Learning Graph Classification +1

3D-QueryIS: A Query-based Framework for 3D Instance Segmentation

no code implementations17 Nov 2022 Jiaheng Liu, Tong He, Honghui Yang, Rui Su, Jiayi Tian, Junran Wu, Hongcheng Guo, Ke Xu, Wanli Ouyang

Previous top-performing methods for 3D instance segmentation often maintain inter-task dependencies and the tendency towards a lack of robustness.

3D Instance Segmentation Segmentation +1

Structural Entropy Guided Graph Hierarchical Pooling

1 code implementation26 Jun 2022 Junran Wu, Xueyuan Chen, Ke Xu, Shangzhe Li

In addition to SEP, we further design two classification models, SEP-G and SEP-N for graph classification and node classification, respectively.

Graph Classification Node Classification

A Simple yet Effective Method for Graph Classification

1 code implementation6 Jun 2022 Junran Wu, Shangzhe Li, Jianhao Li, YiCheng Pan, Ke Xu

Inspired by structural entropy on graphs, we transform the data sample from graphs to coding trees, which is a simpler but essential structure for graph data.

Graph Classification

Hierarchical information matters: Text classification via tree based graph neural network

2 code implementations COLING 2022 Chong Zhang, He Zhu, Xingyu Peng, Junran Wu, Ke Xu

Inspired by the structural entropy, we construct the coding tree of the graph by minimizing the structural entropy and propose HINT, which aims to make full use of the hierarchical information contained in the text for the task of text classification.

Dependency Parsing text-classification +1

Structural Optimization Makes Graph Classification Simpler and Better

1 code implementation5 Sep 2021 Junran Wu, Jianhao Li, YiCheng Pan, Ke Xu

We then present an implementation of the scheme in a tree kernel and a convolutional network to perform graph classification.

Graph Classification

Price graphs: Utilizing the structural information of financial time series for stock prediction

1 code implementation4 Jun 2021 Junran Wu, Ke Xu, Xueyuan Chen, Shangzhe Li, Jichang Zhao

Then, structural information, referring to associations among temporal points and the node weights, is extracted from the mapped graphs to resolve the problems regarding long-range dependencies and the chaotic property.

Stock Prediction Time Series +1

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