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Long-tailed data is still a big challenge for deep neural networks, even though they have achieved great success on balanced data. We observe that vanilla training on long-tailed data with cross-entropy loss makes the instance-rich head…

计算机视觉与模式识别 · 计算机科学 2023-05-22 Mengke Li , Yiu-ming Cheung , Yang Lu

Detecting vulnerabilities in source code is a critical task for software security assurance. Graph Neural Network (GNN) machine learning can be a promising approach by modeling source code as graphs. Early approaches treated code elements…

密码学与安全 · 计算机科学 2025-02-25 Yu Luo , Weifeng Xu , Dianxiang Xu

Automatically locating vulnerable statements in source code is crucial to assure software security and alleviate developers' debugging efforts. This becomes even more important in today's software ecosystem, where vulnerable code can flow…

软件工程 · 计算机科学 2022-01-14 Yangruibo Ding , Sahil Suneja , Yunhui Zheng , Jim Laredo , Alessandro Morari , Gail Kaiser , Baishakhi Ray

Automated detection of software vulnerabilities is a fundamental problem in software security. Existing program analysis techniques either suffer from high false positives or false negatives. Recent progress in Deep Learning (DL) has…

软件工程 · 计算机科学 2020-09-16 Saikat Chakraborty , Rahul Krishna , Yangruibo Ding , Baishakhi Ray

Long-tailed classification poses a challenge due to its heavy imbalance in class probabilities and tail-sensitivity risks with asymmetric misprediction costs. Recent attempts have used re-balancing loss and ensemble methods, but they are…

机器学习 · 计算机科学 2023-03-22 Bolian Li , Ruqi Zhang

Malware represents a significant security concern in today's digital landscape, as it can destroy or disable operating systems, steal sensitive user information, and occupy valuable disk space. However, current malware detection methods,…

密码学与安全 · 计算机科学 2023-12-21 Chenzhong Yin , Hantang Zhang , Mingxi Cheng , Xiongye Xiao , Xinghe Chen , Xin Ren , Paul Bogdan

Graph Neural Networks (GNNs) have achieved promising results in tasks such as node classification and graph classification. However, recent studies reveal that GNNs are vulnerable to backdoor attacks, posing a significant threat to their…

机器学习 · 计算机科学 2025-03-13 Zhiwei Zhang , Minhua Lin , Junjie Xu , Zongyu Wu , Enyan Dai , Suhang Wang

In few-shot learning, typically, the loss function which is applied at test time is the one we are ultimately interested in minimising, such as the mean-squared-error loss for a regression problem. However, given that we have few samples at…

机器学习 · 计算机科学 2019-12-02 Leo Feng , Luisa Zintgraf , Bei Peng , Shimon Whiteson

Ensuring robust performance on long-tail examples is an important problem for many real-world applications of machine learning, such as autonomous driving. This work focuses on the problem of identifying rare examples within a corpus of…

计算机视觉与模式识别 · 计算机科学 2024-09-25 Mao Ye , Gregory P. Meyer , Zaiwei Zhang , Dennis Park , Siva Karthik Mustikovela , Yuning Chai , Eric M Wolff

Though many deep learning-based models have made great progress in vulnerability detection, we have no good understanding of these models, which limits the further advancement of model capability, understanding of the mechanism of model…

软件工程 · 计算机科学 2024-08-15 Chao Ni , Liyu Shen , Xiaodan Xu , Xin Yin , Shaohua Wang

This paper considers learning deep features from long-tailed data. We observe that in the deep feature space, the head classes and the tail classes present different distribution patterns. The head classes have a relatively large spatial…

计算机视觉与模式识别 · 计算机科学 2020-04-14 Jialun Liu , Yifan Sun , Chuchu Han , Zhaopeng Dou , Wenhui Li

Identifying potentially vulnerable locations in a code base is critical as a pre-step for effective vulnerability assessment; i.e., it can greatly help security experts put their time and effort to where it is needed most. Metric-based and…

软件工程 · 计算机科学 2020-01-22 Xiaoning Du , Bihuan Chen , Yuekang Li , Jianmin Guo , Yaqin Zhou , Yang Liu , Yu Jiang

Significant effort has been recently devoted to modeling visual relations. This has mostly addressed the design of architectures, typically by adding parameters and increasing model complexity. However, visual relation learning is a…

计算机视觉与模式识别 · 计算机科学 2021-08-24 Alakh Desai , Tz-Ying Wu , Subarna Tripathi , Nuno Vasconcelos

Malicious software, or malware, presents a continuously evolving challenge in computer security. These embedded snippets of code in the form of malicious files or hidden within legitimate files cause a major risk to systems with their…

人工智能 · 计算机科学 2018-06-29 Rakshit Agrawal , Jack W. Stokes , Mady Marinescu , Karthik Selvaraj

Graph representation learning (GRL) models have succeeded in many scenarios. Real-world graphs have imbalanced distribution, such as node labels and degrees, which leaves a critical challenge to GRL. Imbalanced inputs can lead to imbalanced…

机器学习 · 计算机科学 2024-09-10 Xiaorui Qi , Yanlong Wen , Xiaojie Yuan

Long-tail class incremental learning (LT CIL) remains highly challenging because the scarcity of samples in tail classes not only hampers their learning but also exacerbates catastrophic forgetting under continuously evolving and imbalanced…

人工智能 · 计算机科学 2026-03-24 Xi Wang , Xu Yang , Donghao Sun , Cheng Deng

Identification of critical nodes is a prominent topic in the study of complex networks. Numerous methods have been proposed, yet most exhibit inherent limitations. Traditional approaches primarily analyze specific structural features of the…

社会与信息网络 · 计算机科学 2024-06-25 Hao Wang , Ting Luo , Shuang-ping Yang , Ming Jing , Jian Wang , Na Zhao

The fine-tuning paradigm in addressing long-tail learning tasks has sparked significant interest since the emergence of foundation models. Nonetheless, how fine-tuning impacts performance in long-tail learning was not explicitly quantified.…

计算机视觉与模式识别 · 计算机科学 2024-06-04 Jiang-Xin Shi , Tong Wei , Zhi Zhou , Jie-Jing Shao , Xin-Yan Han , Yu-Feng Li

Deep learning vulnerability detection has shown promising results in recent years. However, an important challenge that still blocks it from being very useful in practice is that the model is not robust under perturbation and it cannot…

软件工程 · 计算机科学 2024-01-17 Md Mahbubur Rahman , Ira Ceka , Chengzhi Mao , Saikat Chakraborty , Baishakhi Ray , Wei Le

Software vulnerabilities in source code pose serious cybersecurity risks, prompting a shift from traditional detection methods (e.g., static analysis, rule-based matching) to AI-driven approaches. This study presents a systematic review of…

软件工程 · 计算机科学 2025-06-13 Samiha Shimmi , Hamed Okhravi , Mona Rahimi