Search Results for author: Tianchun Wang

Found 10 papers, 6 papers with code

Protecting Your LLMs with Information Bottleneck

1 code implementation22 Apr 2024 Zichuan Liu, Zefan Wang, Linjie Xu, Jinyu Wang, Lei Song, Tianchun Wang, Chunlin Chen, Wei Cheng, Jiang Bian

The advent of large language models (LLMs) has revolutionized the field of natural language processing, yet they might be attacked to produce harmful content.

Parametric Augmentation for Time Series Contrastive Learning

1 code implementation16 Feb 2024 Xu Zheng, Tianchun Wang, Wei Cheng, Aitian Ma, Haifeng Chen, Mo Sha, Dongsheng Luo

In this study, we address this gap by analyzing time series data augmentation using information theory and summarizing the most commonly adopted augmentations in a unified format.

Contrastive Learning Data Augmentation +2

PAC Learnability under Explanation-Preserving Graph Perturbations

no code implementations7 Feb 2024 Xu Zheng, Farhad Shirani, Tianchun Wang, Shouwei Gao, Wenqian Dong, Wei Cheng, Dongsheng Luo

It is shown that the sample complexity of explanation-assisted learning can be arbitrarily smaller than explanation-agnostic learning.

Data Augmentation

Explaining Time Series via Contrastive and Locally Sparse Perturbations

1 code implementation16 Jan 2024 Zichuan Liu, Yingying Zhang, Tianchun Wang, Zefan Wang, Dongsheng Luo, Mengnan Du, Min Wu, Yi Wang, Chunlin Chen, Lunting Fan, Qingsong Wen

Explaining multivariate time series is a compound challenge, as it requires identifying important locations in the time series and matching complex temporal patterns.

Contrastive Learning counterfactual +1

DyExplainer: Explainable Dynamic Graph Neural Networks

no code implementations25 Oct 2023 Tianchun Wang, Dongsheng Luo, Wei Cheng, Haifeng Chen, Xiang Zhang

Dynamic GNNs, with their ever-evolving graph structures, pose a unique challenge and require additional efforts to effectively capture temporal dependencies and structural relationships.

Contrastive Learning Link Prediction

Towards Robust Fidelity for Evaluating Explainability of Graph Neural Networks

1 code implementation3 Oct 2023 Xu Zheng, Farhad Shirani, Tianchun Wang, Wei Cheng, Zhuomin Chen, Haifeng Chen, Hua Wei, Dongsheng Luo

An explanation function for GNNs takes a pre-trained GNN along with a graph as input, to produce a `sufficient statistic' subgraph with respect to the graph label.

Decision Making

GC-Flow: A Graph-Based Flow Network for Effective Clustering

1 code implementation26 May 2023 Tianchun Wang, Farzaneh Mirzazadeh, Xiang Zhang, Jie Chen

Graph convolutional networks (GCNs) are \emph{discriminative models} that directly model the class posterior $p(y|\mathbf{x})$ for semi-supervised classification of graph data.

Clustering Representation Learning

Personalized Federated Learning via Heterogeneous Modular Networks

1 code implementation26 Oct 2022 Tianchun Wang, Wei Cheng, Dongsheng Luo, Wenchao Yu, Jingchao Ni, Liang Tong, Haifeng Chen, Xiang Zhang

Personalized Federated Learning (PFL) which collaboratively trains a federated model while considering local clients under privacy constraints has attracted much attention.

Personalized Federated Learning

Multi-Relevance Transfer Learning

no code implementations9 Nov 2017 Tianchun Wang

In this paper, we propose a novel and effective approach called Multi-Relevance Transfer Learning (MRTL) for this purpose, which can simultaneously transfer different knowledge from the source and exploits the shared common latent factors between target domains.

Transfer Learning

Deep Air Learning: Interpolation, Prediction, and Feature Analysis of Fine-grained Air Quality

no code implementations2 Nov 2017 Zhongang Qi, Tianchun Wang, Guojie Song, Weisong Hu, Xi Li, Zhongfei, Zhang

The interpolation, prediction, and feature analysis of fine-gained air quality are three important topics in the area of urban air computing.

feature selection

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