Search Results for author: Yu-An Liu

Found 17 papers, 6 papers with code

Multi-granular Adversarial Attacks against Black-box Neural Ranking Models

no code implementations2 Apr 2024 Yu-An Liu, Ruqing Zhang, Jiafeng Guo, Maarten de Rijke, Yixing Fan, Xueqi Cheng

However, limiting perturbations to a single level of granularity may reduce the flexibility of adversarial examples, thereby diminishing the potential threat of the attack.

Adversarial Attack Decision Making +2

Perturbation-Invariant Adversarial Training for Neural Ranking Models: Improving the Effectiveness-Robustness Trade-Off

no code implementations16 Dec 2023 Yu-An Liu, Ruqing Zhang, Mingkun Zhang, Wei Chen, Maarten de Rijke, Jiafeng Guo, Xueqi Cheng

We decompose the robust ranking error into two components, i. e., a natural ranking error for effectiveness evaluation and a boundary ranking error for assessing adversarial robustness.

Adversarial Robustness Information Retrieval

Black-box Adversarial Attacks against Dense Retrieval Models: A Multi-view Contrastive Learning Method

no code implementations19 Aug 2023 Yu-An Liu, Ruqing Zhang, Jiafeng Guo, Maarten de Rijke, Wei Chen, Yixing Fan, Xueqi Cheng

The AREA task is meant to trick DR models into retrieving a target document that is outside the initial set of candidate documents retrieved by the DR model in response to a query.

Adversarial Attack Attribute +2

On the Robustness of Generative Retrieval Models: An Out-of-Distribution Perspective

no code implementations22 Jun 2023 Yu-An Liu, Ruqing Zhang, Jiafeng Guo, Wei Chen, Xueqi Cheng

Recently, we have witnessed generative retrieval increasingly gaining attention in the information retrieval (IR) field, which retrieves documents by directly generating their identifiers.

Information Retrieval Retrieval

Topic-oriented Adversarial Attacks against Black-box Neural Ranking Models

1 code implementation28 Apr 2023 Yu-An Liu, Ruqing Zhang, Jiafeng Guo, Maarten de Rijke, Wei Chen, Yixing Fan, Xueqi Cheng

In this paper, we focus on a more general type of perturbation and introduce the topic-oriented adversarial ranking attack task against NRMs, which aims to find an imperceptible perturbation that can promote a target document in ranking for a group of queries with the same topic.

Information Retrieval Retrieval

Gated Res2Net for Multivariate Time Series Analysis

1 code implementation19 Sep 2020 Chao Yang, Mingxing Jiang, Zhongwen Guo, Yu-An Liu

Through the utilization of gated mechanism, the network can control the process of information sending hence can better capture and utilize the both the temporal information and the correlations between the feature maps.

Time Series Time Series Analysis

Proof of Learning (PoLe): Empowering Machine Learning with Consensus Building on Blockchains

no code implementations29 Jul 2020 Yixiao Lan, Yu-An Liu, Boyang Li

Empirical evaluation shows that SML can detect cheating nodes at small cost to the predictive performance.

BIG-bench Machine Learning valid

MagnifierNet: Towards Semantic Adversary and Fusion for Person Re-identification

1 code implementation25 Feb 2020 Yushi Lan, Yu-An Liu, Maoqing Tian, Xinchi Zhou, Xuesen Zhang, Shuai Yi, Hongsheng Li

Meanwhile, we introduce "Semantic Fusion Branch" to filter out irrelevant noises by selectively fusing semantic region information sequentially.

Person Re-Identification

DermGAN: Synthetic Generation of Clinical Skin Images with Pathology

no code implementations20 Nov 2019 Amirata Ghorbani, Vivek Natarajan, David Coz, Yu-An Liu

Despite the recent success in applying supervised deep learning to medical imaging tasks, the problem of obtaining large and diverse expert-annotated datasets required for the development of high performant models remains particularly challenging.

Data Augmentation

PVNet: Pixel-wise Voting Network for 6DoF Pose Estimation

4 code implementations CVPR 2019 Sida Peng, Yu-An Liu, Qi-Xing Huang, Hujun Bao, Xiaowei Zhou

We further create a Truncation LINEMOD dataset to validate the robustness of our approach against truncation.

Ranked #2 on 6D Pose Estimation using RGB on YCB-Video (Mean AUC metric)

6D Pose Estimation using RGB

VSE-ens: Visual-Semantic Embeddings with Efficient Negative Sampling

no code implementations5 Jan 2018 Guibing Guo, Songlin Zhai, Fajie Yuan, Yu-An Liu, Xingwei Wang

Jointing visual-semantic embeddings (VSE) have become a research hotpot for the task of image annotation, which suffers from the issue of semantic gap, i. e., the gap between images' visual features (low-level) and labels' semantic features (high-level).

Nintendo Super Smash Bros. Melee: An "Untouchable" Agent

no code implementations8 Dec 2017 Ben Parr, Deepak Dilipkumar, Yu-An Liu

Nintendo's Super Smash Bros. Melee fighting game can be emulated on modern hardware allowing us to inspect internal memory states, such as character positions.

DuReader: a Chinese Machine Reading Comprehension Dataset from Real-world Applications

3 code implementations WS 2018 Wei He, Kai Liu, Jing Liu, Yajuan Lyu, Shiqi Zhao, Xinyan Xiao, Yu-An Liu, Yizhong Wang, Hua Wu, Qiaoqiao She, Xuan Liu, Tian Wu, Haifeng Wang

Experiments show that human performance is well above current state-of-the-art baseline systems, leaving plenty of room for the community to make improvements.

Machine Reading Comprehension

Glasgow's Stereo Image Database of Garments

no code implementations28 Nov 2013 Gerardo Aragon-Camarasa, Susanne B. Oehler, Yu-An Liu, Sun Li, Paul Cockshott, J. Paul Siebert

To provide insight into cloth perception and manipulation with an active binocular robotic vision system, we compiled a database of 80 stereo-pair colour images with corresponding horizontal and vertical disparity maps and mask annotations, for 3D garment point cloud rendering has been created and released.

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