Search Results for author: Xiaojun Chen

Found 49 papers, 8 papers with code

CipherDM: Secure Three-Party Inference for Diffusion Model Sampling

no code implementations9 Sep 2024 Xin Zhao, Xiaojun Chen, Xudong Chen, He Li, Tingyu Fan, Zhendong Zhao

Diffusion Models (DMs) achieve state-of-the-art synthesis results in image generation and have been applied to various fields.

Image Generation

Orthogonal Constrained Minimization with Tensor $\ell_{2,p}$ Regularization for HSI Denoising and Destriping

no code implementations4 Jul 2024 Xiaoxia Liu, Shijie Yu, Jian Lu, Xiaojun Chen

The model of the proposed NLTL2p approach is built based on a new sparsity-enhanced Nonlocal Low-rank Tensor regularization and a tensor $\ell_{2, p}$ norm with $p\in(0, 1)$.

Denoising

Federated Learning with Limited Node Labels

no code implementations18 Jun 2024 Bisheng Tang, Xiaojun Chen, Shaopu Wang, Yuexin Xuan, Zhendong Zhao

In SFL, the local model comprises graph neural networks (GNNs) with a partial graph structure.

Federated Learning Node Classification

Enhancing Noise Robustness of Retrieval-Augmented Language Models with Adaptive Adversarial Training

1 code implementation31 May 2024 Feiteng Fang, Yuelin Bai, Shiwen Ni, Min Yang, Xiaojun Chen, Ruifeng Xu

Prior RAG studies on the robustness of retrieval noises often confine themselves to a limited set of noise types, deviating from real-world retrieval environments and limiting practical applicability.

Hallucination Multi-Task Learning +2

Open-SQL Framework: Enhancing Text-to-SQL on Open-source Large Language Models

no code implementations4 May 2024 Xiaojun Chen, Tianle Wang, Tianhao Qiu, Jianbin Qin, Min Yang

Despite the success of large language models (LLMs) in Text-to-SQL tasks, open-source LLMs encounter challenges in contextual understanding and response coherence.

Few-Shot Learning Text-To-SQL

ROG$_{PL}$: Robust Open-Set Graph Learning via Region-Based Prototype Learning

no code implementations28 Feb 2024 Qin Zhang, Xiaowei Li, Jiexin Lu, Liping Qiu, Shirui Pan, Xiaojun Chen, Junyang Chen

In specific, ROG$_{PL}$ consists of two modules, i. e., denoising via label propagation and open-set prototype learning via regions.

Denoising Graph Learning +2

Unsupervised multiple choices question answering via universal corpus

no code implementations27 Feb 2024 Qin Zhang, Hao Ge, Xiaojun Chen, Meng Fang

Unsupervised question answering is a promising yet challenging task, which alleviates the burden of building large-scale annotated data in a new domain.

Knowledge Graphs Multiple-choice +1

MoZIP: A Multilingual Benchmark to Evaluate Large Language Models in Intellectual Property

1 code implementation26 Feb 2024 Shiwen Ni, Minghuan Tan, Yuelin Bai, Fuqiang Niu, Min Yang, BoWen Zhang, Ruifeng Xu, Xiaojun Chen, Chengming Li, Xiping Hu, Ye Li, Jianping Fan

In this paper, we contribute a new benchmark, the first Multilingual-oriented quiZ on Intellectual Property (MoZIP), for the evaluation of LLMs in the IP domain.

Language Modelling Large Language Model +2

Representation Surgery for Multi-Task Model Merging

1 code implementation5 Feb 2024 Enneng Yang, Li Shen, Zhenyi Wang, Guibing Guo, Xiaojun Chen, Xingwei Wang, DaCheng Tao

That is, there is a significant discrepancy in the representation distribution between the merged and individual models, resulting in poor performance of merged MTL.

Computational Efficiency Multi-Task Learning

Multi-level Cross-modal Alignment for Image Clustering

no code implementations22 Jan 2024 Liping Qiu, Qin Zhang, Xiaojun Chen, Shaotian Cai

Recently, the cross-modal pretraining model has been employed to produce meaningful pseudo-labels to supervise the training of an image clustering model.

Clustering cross-modal alignment +1

MedShapeNet -- A Large-Scale Dataset of 3D Medical Shapes for Computer Vision

1 code implementation30 Aug 2023 Jianning Li, Zongwei Zhou, Jiancheng Yang, Antonio Pepe, Christina Gsaxner, Gijs Luijten, Chongyu Qu, Tiezheng Zhang, Xiaoxi Chen, Wenxuan Li, Marek Wodzinski, Paul Friedrich, Kangxian Xie, Yuan Jin, Narmada Ambigapathy, Enrico Nasca, Naida Solak, Gian Marco Melito, Viet Duc Vu, Afaque R. Memon, Christopher Schlachta, Sandrine de Ribaupierre, Rajnikant Patel, Roy Eagleson, Xiaojun Chen, Heinrich Mächler, Jan Stefan Kirschke, Ezequiel de la Rosa, Patrick Ferdinand Christ, Hongwei Bran Li, David G. Ellis, Michele R. Aizenberg, Sergios Gatidis, Thomas Küstner, Nadya Shusharina, Nicholas Heller, Vincent Andrearczyk, Adrien Depeursinge, Mathieu Hatt, Anjany Sekuboyina, Maximilian Löffler, Hans Liebl, Reuben Dorent, Tom Vercauteren, Jonathan Shapey, Aaron Kujawa, Stefan Cornelissen, Patrick Langenhuizen, Achraf Ben-Hamadou, Ahmed Rekik, Sergi Pujades, Edmond Boyer, Federico Bolelli, Costantino Grana, Luca Lumetti, Hamidreza Salehi, Jun Ma, Yao Zhang, Ramtin Gharleghi, Susann Beier, Arcot Sowmya, Eduardo A. Garza-Villarreal, Thania Balducci, Diego Angeles-Valdez, Roberto Souza, Leticia Rittner, Richard Frayne, Yuanfeng Ji, Vincenzo Ferrari, Soumick Chatterjee, Florian Dubost, Stefanie Schreiber, Hendrik Mattern, Oliver Speck, Daniel Haehn, Christoph John, Andreas Nürnberger, João Pedrosa, Carlos Ferreira, Guilherme Aresta, António Cunha, Aurélio Campilho, Yannick Suter, Jose Garcia, Alain Lalande, Vicky Vandenbossche, Aline Van Oevelen, Kate Duquesne, Hamza Mekhzoum, Jef Vandemeulebroucke, Emmanuel Audenaert, Claudia Krebs, Timo Van Leeuwen, Evie Vereecke, Hauke Heidemeyer, Rainer Röhrig, Frank Hölzle, Vahid Badeli, Kathrin Krieger, Matthias Gunzer, Jianxu Chen, Timo van Meegdenburg, Amin Dada, Miriam Balzer, Jana Fragemann, Frederic Jonske, Moritz Rempe, Stanislav Malorodov, Fin H. Bahnsen, Constantin Seibold, Alexander Jaus, Zdravko Marinov, Paul F. Jaeger, Rainer Stiefelhagen, Ana Sofia Santos, Mariana Lindo, André Ferreira, Victor Alves, Michael Kamp, Amr Abourayya, Felix Nensa, Fabian Hörst, Alexander Brehmer, Lukas Heine, Yannik Hanusrichter, Martin Weßling, Marcel Dudda, Lars E. Podleska, Matthias A. Fink, Julius Keyl, Konstantinos Tserpes, Moon-Sung Kim, Shireen Elhabian, Hans Lamecker, Dženan Zukić, Beatriz Paniagua, Christian Wachinger, Martin Urschler, Luc Duong, Jakob Wasserthal, Peter F. Hoyer, Oliver Basu, Thomas Maal, Max J. H. Witjes, Gregor Schiele, Ti-chiun Chang, Seyed-Ahmad Ahmadi, Ping Luo, Bjoern Menze, Mauricio Reyes, Thomas M. Deserno, Christos Davatzikos, Behrus Puladi, Pascal Fua, Alan L. Yuille, Jens Kleesiek, Jan Egger

For the medical domain, we present a large collection of anatomical shapes (e. g., bones, organs, vessels) and 3D models of surgical instrument, called MedShapeNet, created to facilitate the translation of data-driven vision algorithms to medical applications and to adapt SOTA vision algorithms to medical problems.

Anatomy Mixed Reality

Practical and General Backdoor Attacks against Vertical Federated Learning

no code implementations19 Jun 2023 Yuexin Xuan, Xiaojun Chen, Zhendong Zhao, Bisheng Tang, Ye Dong

The main challenge of this attack is to allow an attacker without access to the data labels, to perform an effective attack.

Vertical Federated Learning

Semantic-Enhanced Image Clustering

no code implementations21 Aug 2022 Shaotian Cai, Liping Qiu, Xiaojun Chen, Qin Zhang, Longteng Chen

In this paper, we propose to investigate the task of image clustering with the help of a visual-language pre-training model.

Clustering Image Clustering +1

PrUE: Distilling Knowledge from Sparse Teacher Networks

1 code implementation3 Jul 2022 Shaopu Wang, Xiaojun Chen, Mengzhen Kou, Jinqiao Shi

Besides, our method allows researchers to distill knowledge from deeper networks to improve students further.

Knowledge Distillation

Identifying Electrocardiogram Abnormalities Using a Handcrafted-Rule-Enhanced Neural Network

1 code implementation16 Jun 2022 Yuexin Bian, Jintai Chen, Xiaojun Chen, Xiaoxian Yang, Danny Z. Chen, Jian Wu

Automatic ECG classification methods, especially the deep learning based ones, have been proposed to detect cardiac abnormalities using ECG records, showing good potential to improve clinical diagnosis and help early prevention of cardiovascular diseases.

Clinical Knowledge ECG Classification

CLTS+: A New Chinese Long Text Summarization Dataset with Abstractive Summaries

no code implementations9 Jun 2022 Xiaojun Liu, Shunan Zang, Chuang Zhang, Xiaojun Chen, Yangyang Ding

In order to solve this problem, we paraphrase the reference summaries in CLTS, the Chinese Long Text Summarization dataset, correct errors of factual inconsistencies, and propose the first Chinese Long Text Summarization dataset with a high level of abstractiveness, CLTS+, which contains more than 180K article-summary pairs and is available online.

Text Summarization

Deep Unsupervised Hashing with Latent Semantic Components

no code implementations17 Mar 2022 Qinghong Lin, Xiaojun Chen, Qin Zhang, Shaotian Cai, Wenzhe Zhao, Hongfa Wang

Firstly, DSCH constructs a semantic component structure by uncovering the fine-grained semantics components of images with a Gaussian Mixture Modal~(GMM), where an image is represented as a mixture of multiple components, and the semantics co-occurrence are exploited.

Common Sense Reasoning Image Retrieval +1

DEFEAT: Deep Hidden Feature Backdoor Attacks by Imperceptible Perturbation and Latent Representation Constraints

no code implementations CVPR 2022 Zhendong Zhao, Xiaojun Chen, Yuexin Xuan, Ye Dong, Dakui Wang, Kaitai Liang

Backdoor attack is a type of serious security threat to deep learning models. An adversary can provide users with a model trained on poisoned data to manipulate prediction behavior in test stage using a backdoor.

Backdoor Attack

Deep Self-Adaptive Hashing for Image Retrieval

no code implementations16 Aug 2021 Qinghong Lin, Xiaojun Chen, Qin Zhang, Shangxuan Tian, Yudong Chen

Secondly, we measure the priorities of data pairs with PIC and assign adaptive weights to them, which is relies on the assumption that more dissimilar data pairs contain more discriminative information for hash learning.

Deep Hashing Image Retrieval

A Riemannian smoothing steepest descent method for non-Lipschitz optimization on submanifolds

no code implementations9 Apr 2021 Chao Zhang, Xiaojun Chen, Shiqian Ma

In this paper, we propose a Riemannian smoothing steepest descent method to minimize a nonconvex and non-Lipschitz function on submanifolds.

Pure Characteristics Demand Models and Distributionally Robust Mathematical Programs with Stochastic Complementarity Constraints

no code implementations9 Feb 2021 Jie Jiang, Xiaojun Chen

We formulate pure characteristics demand models under uncertainties of probability distributions as distributionally robust mathematical programs with stochastic complementarity constraints (DRMP-SCC).

Optimization and Control 90C15, 90C33, 90C26

A Distributed Training Algorithm of Generative Adversarial Networks with Quantized Gradients

no code implementations26 Oct 2020 Xiaojun Chen, Shu Yang, Li Shen, Xuanrong Pang

In this paper, we propose a {distributed GANs training algorithm with quantized gradient, dubbed DQGAN,} which is the first distributed training method with quantized gradient for GANs.

A weakly supervised registration-based framework for prostate segmentation via the combination of statistical shape model and CNN

no code implementations23 Jul 2020 Chunxia Qin, Xiaojun Chen, Jocelyne Troccaz

To address this problem, we proposed a weakly supervised registration-based framework for the precise prostate segmentation, by combining convolutional neural network (CNN) with statistical shape model (SSM).

Lesion Detection Segmentation

Improving Abstractive Text Summarization with History Aggregation

no code implementations24 Dec 2019 Pengcheng Liao, Chuang Zhang, Xiaojun Chen, Xiaofei Zhou

Recent neural sequence to sequence models have provided feasible solutions for abstractive summarization.

Abstractive Text Summarization Decoder

Sparse Solutions of a Class of Constrained Optimization Problems

no code implementations1 Jul 2019 Lei Yang, Xiaojun Chen, Shuhuang Xiang

Specifically, without any condition on the matrix $A$, we provide upper bounds in cardinality and infinity norm for the optimal solutions, and show that all optimal solutions must be on the boundary of the feasible set when $0<p<1$.

Denoising

Triple Trustworthiness Measurement for Knowledge Graph

1 code implementation25 Sep 2018 Shengbin Jia, Yang Xiang, Xiaojun Chen

The Knowledge graph (KG) uses the triples to describe the facts in the real world.

Vertebral body segmentation with GrowCut: Initial experience, workflow and practical application

no code implementations13 Nov 2017 Jan Egger, Christopher Nimsky, Xiaojun Chen

In this contribution, we used the GrowCut segmentation algorithm publicly available in three-dimensional Slicer for three-dimensional segmentation of vertebral bodies.

Segmentation

A Self-Balanced Min-Cut Algorithm for Image Clustering

no code implementations ICCV 2017 Xiaojun Chen, Joshua Zhexue Haung, Feiping Nie, Renjie Chen, Qingyao Wu

In the new method, a self-balanced min-cut model is proposed in which the Exclusive Lasso is implicitly introduced as a balance regularizer in order to produce balanced partition.

Clustering Content-Based Image Retrieval +2

Identifying and Tracking Sentiments and Topics from Social Media Texts during Natural Disasters

no code implementations EMNLP 2017 Min Yang, Jincheng Mei, Heng Ji, Wei Zhao, Zhou Zhao, Xiaojun Chen

We study the problem of identifying the topics and sentiments and tracking their shifts from social media texts in different geographical regions during emergencies and disasters.

Topic Models

Computer-aided position planning of miniplates to treat facial bone defects

no code implementations17 Aug 2017 Jan Egger, Jürgen Wallner, Markus Gall, Xiaojun Chen, Katja Schwenzer-Zimmerer, Knut Reinbacher, Dieter Schmalstieg

In this contribution, a software system for computer-aided position planning of miniplates to treat facial bone defects is proposed.

Anatomy Position

Computer-aided implant design for the restoration of cranial defects

no code implementations23 Jun 2017 Xiaojun Chen, Lu Xu, Xing Li, Jan Egger

Patient-specific cranial implants are important and necessary in the surgery of cranial defect restoration.

A Non-monotone Alternating Updating Method for A Class of Matrix Factorization Problems

no code implementations18 May 2017 Lei Yang, Ting Kei Pong, Xiaojun Chen

Finally, we conduct some numerical experiments using real datasets to compare our method with some existing efficient methods for non-negative matrix factorization and matrix completion.

Matrix Completion

Interactive Outlining of Pancreatic Cancer Liver Metastases in Ultrasound Images

no code implementations18 Apr 2017 Jan Egger, Dieter Schmalstieg, Xiaojun Chen, Wolfram G. Zoller, Alexander Hann

In this contribution, we present the results of an interactive segmentation approach for liver metastases in US acquisitions.

Interactive Segmentation Segmentation

A semi-automatic computer-aided method for surgical template design

no code implementations4 Feb 2016 Xiaojun Chen, Lu Xu, Yue Yang, Jan Egger

Then, the offset surface of the inner surface is obtained through contouring the distance field of the inner surface, and segmented to generate the outer surface.

Segmentation

Linear Convergence of Proximal Gradient Algorithm with Extrapolation for a Class of Nonconvex Nonsmooth Minimization Problems

1 code implementation31 Dec 2015 Bo Wen, Xiaojun Chen, Ting Kei Pong

In this paper, we study the proximal gradient algorithm with extrapolation for minimizing the sum of a Lipschitz differentiable function and a proper closed convex function.

Generalized Conjugate Gradient Methods for $\ell_1$ Regularized Convex Quadratic Programming with Finite Convergence

no code implementations24 Nov 2015 Zhaosong Lu, Xiaojun Chen

In this paper we propose some generalized CG (GCG) methods for solving the $\ell_1$-regularized (possibly not strongly) convex QP that terminate at an optimal solution in a finite number of iterations.

Penalty methods for a class of non-Lipschitz optimization problems

no code implementations9 Sep 2014 Xiaojun Chen, Zhaosong Lu, Ting Kei Pong

We consider a class of constrained optimization problems with a possibly nonconvex non-Lipschitz objective and a convex feasible set being the intersection of a polyhedron and a possibly degenerate ellipsoid.

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