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Contrastive learning has recently achieved compelling performance in unsupervised sentence representation. As an essential element, data augmentation protocols, however, have not been well explored. The pioneering work SimCSE resorting to a…

计算与语言 · 计算机科学 2024-06-17 Dongsheng Zhu , Zhenyu Mao , Jinghui Lu , Rui Zhao , Fei Tan

Data imputation has been extensively explored to solve the missing data problem. The dramatically increasing volume of incomplete data makes the imputation models computationally infeasible in many real-life applications. In this paper, we…

机器学习 · 计算机科学 2022-01-11 Yangyang Wu , Jun Wang , Xiaoye Miao , Wenjia Wang , Jianwei Yin

Self-supervised learning (SSL) speech models generate meaningful representations of given clips and achieve incredible performance across various downstream tasks. Model extraction attack (MEA) often refers to an adversary stealing the…

声音 · 计算机科学 2023-10-10 Tsu-Yuan Hsu , Chen-An Li , Tung-Yu Wu , Hung-yi Lee

With the wide applications of deep neural network models in various computer vision tasks, more and more works study the model vulnerability to adversarial examples. For data-free black box attack scenario, existing methods are inspired by…

计算机视觉与模式识别 · 计算机科学 2022-04-05 Wenxuan Wang , Xuelin Qian , Yanwei Fu , Xiangyang Xue

Adversarial attacks on stochastic bandits have traditionally relied on some unrealistic assumptions, such as per-round reward manipulation and unbounded perturbations, limiting their relevance to real-world systems. We propose a more…

机器学习 · 计算机科学 2026-05-08 Qirun Zeng , Eric He , Richard Hoffmann , Xuchuang Wang , Jinhang Zuo

The artificial intelligence (AI) world is running out of real data for training increasingly large generative models, resulting in accelerating pressure to train on synthetic data. Unfortunately, training new generative models with…

机器学习 · 计算机科学 2024-08-30 Sina Alemohammad , Ahmed Imtiaz Humayun , Shruti Agarwal , John Collomosse , Richard Baraniuk

Machine learning models have been shown to leak information violating the privacy of their training set. We focus on membership inference attacks on machine learning models which aim to determine whether a data point was used to train the…

密码学与安全 · 计算机科学 2020-09-02 Shadi Rahimian , Tribhuvanesh Orekondy , Mario Fritz

Recent studies have revealed that grammatical error correction methods in the sequence-to-sequence paradigm are vulnerable to adversarial attack, and simply utilizing adversarial examples in the pre-training or post-training process can…

计算与语言 · 计算机科学 2023-10-24 Zecheng Tang , Kaifeng Qi , Juntao Li , Min Zhang

The increasing demand for domain-specific and human-aligned Large Language Models (LLMs) has led to the widespread adoption of Supervised Fine-Tuning (SFT) techniques. SFT datasets often comprise valuable instruction-response pairs, making…

密码学与安全 · 计算机科学 2025-06-24 Zongjie Li , Daoyuan Wu , Shuai Wang , Zhendong Su

Discrete adversarial attacks are symbolic perturbations to a language input that preserve the output label but lead to a prediction error. While such attacks have been extensively explored for the purpose of evaluating model robustness,…

机器学习 · 计算机科学 2021-11-02 Maor Ivgi , Jonathan Berant

Among adversarial attacks against sequential recommender systems, model extraction attacks represent a method to attack sequential recommendation models without prior knowledge. Existing research has primarily concentrated on the…

机器学习 · 计算机科学 2026-03-04 Hui Zhang , Fu Liu

Mixture-of-Experts (MoE) has emerged as a prominent architecture for scaling model size while maintaining computational efficiency. In MoE, each token in the input sequence activates a different subset of experts determined by a routing…

计算与语言 · 计算机科学 2024-11-05 Chufan Shi , Cheng Yang , Xinyu Zhu , Jiahao Wang , Taiqiang Wu , Siheng Li , Deng Cai , Yujiu Yang , Yu Meng

Automatic feature engineering is an effective approach for improving predictive performance in tabular learning. However, expand-and-reduce methods, such as OpenFE, become increasingly computationally expensive as the input dimensionality…

机器学习 · 统计学 2026-05-01 Minhee Park , Seongyeon Son , Yonghyun Lee , Eunchan Kim

Current multi-task adversarial text attacks rely on abundant access to shared internal features and numerous queries, often limited to a single task type. As a result, these attacks are less effective against practical scenarios involving…

密码学与安全 · 计算机科学 2025-08-15 Wenqiang Wang , Yan Xiao , Hao Lin , Yangshijie Zhang , Xiaochun Cao

Model-free knockoffs is a recently proposed technique for identifying covariates that is likely to have an effect on a response variable. The method is an efficient method to control the false discovery rate in hypothesis tests for separate…

统计方法学 · 统计学 2019-03-29 Lars Holden , Kristoffer Hellton

Machine Learning as a Service (MLaaS) is often provided as a pay-per-query, black-box system to clients. Such a black-box approach not only hinders open replication, validation, and interpretation of model results, but also makes it harder…

密码学与安全 · 计算机科学 2024-09-18 Jonathan Rosenthal , Shanchao Liang , Kevin Zhang , Lin Tan

The vulnerability of deep neural networks to adversarial examples has motivated an increasing number of defense strategies for promoting model robustness. However, the progress is usually hampered by insufficient robustness evaluations. As…

机器学习 · 计算机科学 2021-10-19 Xiao Yang , Yinpeng Dong , Wenzhao Xiang , Tianyu Pang , Hang Su , Jun Zhu

Integrating model-free and model-based approaches in reinforcement learning has the potential to achieve the high performance of model-free algorithms with low sample complexity. However, this is difficult because an imperfect dynamics…

机器学习 · 计算机科学 2019-06-10 Jacob Buckman , Danijar Hafner , George Tucker , Eugene Brevdo , Honglak Lee

Evidence on the effectiveness of Man-At-The-End (MATE) software protections, such as code obfuscation, has mainly come from limited empirical research. Recently, however, an automatable method was proposed to obtain statistical models of…

密码学与安全 · 计算机科学 2026-05-18 Alessandro Sanna , Waldo Verstraete , Leonardo Regano , Davide Maiorca , Bjorn De Sutter

Model Extraction attacks exploit the target model's prediction API to create a surrogate model in order to steal or reconnoiter the functionality of the target model in the black-box setting. Several recent studies have shown that a…

机器学习 · 计算机科学 2022-02-25 Amir Mahdi Sadeghzadeh , Amir Mohammad Sobhanian , Faezeh Dehghan , Rasool Jalili