Search Results for author: Shangzhe Li

Found 6 papers, 5 papers with code

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

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

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

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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