activity
20202026
most citedProbabilistic Margins for Instance Reweighting in Adversarial Training

20 citations · 76 across the 17 of their papers we have counts for

collaborators

18 papers

cs.CL2026

Encoding Context into LLM Weights: What Makes It Context?

Yue Wang, Qizhou Wang, Feng Liu +3

Longer contexts allow large language models (LLMs) to condition their predictions on more information, but inference costs grow prohibitively with context length. An emerging alter…

cs.LG2025

Reinforcement Learning with Verifiable yet Noisy Rewards under Imperfect Verifiers

Xin-Qiang Cai, Wei Wang, Feng Liu +3

Reinforcement Learning with Verifiable Rewards (RLVR) replaces costly human labeling with automated verifiers. To reduce verifier hacking, many RLVR systems binarize rewards to $\{…

cs.CV2024

Mind the Gap Between Prototypes and Images in Cross-domain Finetuning

Hongduan Tian, Feng Liu, Zhanke Zhou +3

In cross-domain few-shot classification (CFC), recent works mainly focus on adapting a simple transformation head on top of a frozen pre-trained backbone with few labeled data to p…

cs.LG2024

Optimal Kernel Choice for Score Function-based Causal Discovery

Wenjie Wang, Biwei Huang, Feng Liu +4

Score-based methods have demonstrated their effectiveness in discovering causal relationships by scoring different causal structures based on their goodness of fit to the data. Rec…

cs.CV2024

Improving Accuracy-robustness Trade-off via Pixel Reweighted Adversarial Training

Jiacheng Zhang, Feng Liu, Dawei Zhou +2

Adversarial training (AT) trains models using adversarial examples (AEs), which are natural images modified with specific perturbations to mislead the model. These perturbations ar…

cs.LG2024

MOKD: Cross-domain Finetuning for Few-shot Classification via Maximizing Optimized Kernel Dependence

Hongduan Tian, Feng Liu, Tongliang Liu +3

In cross-domain few-shot classification, \emph{nearest centroid classifier} (NCC) aims to learn representations to construct a metric space where few-shot classification can be per…

cs.LG2023

Diversity-enhancing Generative Network for Few-shot Hypothesis Adaptation

Ruijiang Dong, Feng Liu, Haoang Chi +5

Generating unlabeled data has been recently shown to help address the few-shot hypothesis adaptation (FHA) problem, where we aim to train a classifier for the target domain with a…

cs.SD2023

CoverHunter: Cover Song Identification with Refined Attention and Alignments

Feng Liu, Deyi Tuo, Yinan Xu +1

Abstract: Cover song identification (CSI) focuses on finding the same music with different versions in reference anchors given a query track. In this paper, we propose a novel syst…

cs.LG2023★ 4 cited

Detecting Adversarial Data by Probing Multiple Perturbations Using Expected Perturbation Score

Shuhai Zhang, Feng Liu, Jiahao Yang +4

Adversarial detection aims to determine whether a given sample is an adversarial one based on the discrepancy between natural and adversarial distributions. Unfortunately, estimati…

cs.CV2023★ 2 cited

Attacking Perceptual Similarity Metrics

Abhijay Ghildyal, Feng Liu

Perceptual similarity metrics have progressively become more correlated with human judgments on perceptual similarity; however, despite recent advances, the addition of an impercep…

cs.LG2023★ 4 cited

Enhancing Adversarial Contrastive Learning via Adversarial Invariant Regularization

Xilie Xu, Jingfeng Zhang, Feng Liu +2

Adversarial contrastive learning (ACL) is a technique that enhances standard contrastive learning (SCL) by incorporating adversarial data to learn a robust representation that can…

cs.LG2023★ 7 cited

Efficient Adversarial Contrastive Learning via Robustness-Aware Coreset Selection

Xilie Xu, Jingfeng Zhang, Feng Liu +2

Adversarial contrastive learning (ACL) does not require expensive data annotations but outputs a robust representation that withstands adversarial attacks and also generalizes to a…

cs.LG2022★ 5 cited

Watermarking for Out-of-distribution Detection

Qizhou Wang, Feng Liu, Yonggang Zhang +4

Out-of-distribution (OOD) detection aims to identify OOD data based on representations extracted from well-trained deep models. However, existing methods largely ignore the reprogr…

cs.LG2022

Adversarial Attack and Defense for Non-Parametric Two-Sample Tests

Xilie Xu, Jingfeng Zhang, Feng Liu +2

Non-parametric two-sample tests (TSTs) that judge whether two sets of samples are drawn from the same distribution, have been widely used in the analysis of critical data. People t…

cs.LG2021★ 20 cited

Probabilistic Margins for Instance Reweighting in Adversarial Training

Qizhou Wang, Feng Liu, Bo Han +5

Reweighting adversarial data during training has been recently shown to improve adversarial robustness, where data closer to the current decision boundaries are regarded as more cr…

cs.LG2021★ 2 cited

TOHAN: A One-step Approach towards Few-shot Hypothesis Adaptation

Haoang Chi, Feng Liu, Wenjing Yang +5

In few-shot domain adaptation (FDA), classifiers for the target domain are trained with accessible labeled data in the source domain (SD) and few labeled data in the target domain…

cs.LG2021★ 16 cited

Meta Discovery: Learning to Discover Novel Classes given Very Limited Data

Haoang Chi, Feng Liu, Bo Han +6

In novel class discovery (NCD), we are given labeled data from seen classes and unlabeled data from unseen classes, and we train clustering models for the unseen classes. However,…

cs.LG2020★ 16 cited

Maximum Mean Discrepancy Test is Aware of Adversarial Attacks

Ruize Gao, Feng Liu, Jingfeng Zhang +4

The maximum mean discrepancy (MMD) test could in principle detect any distributional discrepancy between two datasets. However, it has been shown that the MMD test is unaware of ad…