Search Results for author: Xiaofeng Xu

Found 8 papers, 2 papers with code

Constructing Canonical Feynman Integrals with Intersection Theory

no code implementations7 Aug 2020 Jiaqi Chen, Xuhang Jiang, Xiaofeng Xu, Li Lin Yang

Canonical Feynman integrals are of great interest in the study of scattering amplitudes at the multi-loop level.

High Energy Physics - Theory High Energy Physics - Phenomenology

Odd-even layer-number effect and layer-dependent magnetic phase diagrams in MnBi2Te4

1 code implementation12 Jun 2020 Shiqi Yang, Xiaolong Xu, Yaozheng Zhu, Ruirui Niu, Chunqiang Xu, Yuxuan Peng, Xing Cheng, Xionghui Jia, Xiaofeng Xu, Jianming Lu, Yu Ye

However, the layer-dependent magnetism of MnBi2Te4, which is fundamental and crucial for further exploration of quantum phenomena in this system, remains elusive.

Materials Science

PGLP: Customizable and Rigorous Location Privacy through Policy Graph

3 code implementations4 May 2020 Yang Cao, Yonghui Xiao, Shun Takagi, Li Xiong, Masatoshi Yoshikawa, Yilin Shen, Jinfei Liu, Hongxia Jin, Xiaofeng Xu

Third, we design a private location trace release framework that pipelines the detection of location exposure, policy graph repair, and private trajectory release with customizable and rigorous location privacy.

Cryptography and Security Computers and Society

Improving Generalization via Attribute Selection on Out-of-the-box Data

no code implementations26 Jul 2019 Xiaofeng Xu, Ivor W. Tsang, Chuancai Liu

Unfortunately, previous attribute selection methods are conducted based on the seen data, and their selected attributes have poor generalization capability to the unseen data, which is unavailable in the training stage of ZSL tasks.

Attribute Zero-Shot Learning

Learning Image-Specific Attributes by Hyperbolic Neighborhood Graph Propagation

no code implementations20 May 2019 Xiaofeng Xu, Ivor W. Tsang, Xiaofeng Cao, Ruiheng Zhang, Chuancai Liu

In most of existing attribute-based research, class-specific attributes (CSA), which are class-level annotations, are usually adopted due to its low annotation cost for each class instead of each individual image.

Attribute

Target-Independent Active Learning via Distribution-Splitting

no code implementations28 Sep 2018 Xiaofeng Cao, Ivor W. Tsang, Xiaofeng Xu, Guandong Xu

By discovering the connections between hypothesis and input distribution, we map the volume of version space into the number density and propose a target-independent distribution-splitting strategy with the following advantages: 1) provide theoretical guarantees on reducing label complexity and error rate as volume-splitting; 2) break the curse of initial hypothesis; 3) provide model guidance for a target-independent AL algorithm in real AL tasks.

Active Learning

Complementary Attributes: A New Clue to Zero-Shot Learning

no code implementations17 Apr 2018 Xiaofeng Xu, Ivor W. Tsang, Chuancai Liu

Extensive experiments on five ZSL benchmark datasets and the large-scale ImageNet dataset demonstrate that the proposed complementary attributes and rank aggregation can significantly and robustly improve existing ZSL methods and achieve the state-of-the-art performance.

Attribute Style Generalization +1

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