Search Results for author: Zitai Wang

Found 7 papers, 7 papers with code

ADA-GAD: Anomaly-Denoised Autoencoders for Graph Anomaly Detection

1 code implementation22 Dec 2023 Junwei He, Qianqian Xu, Yangbangyan Jiang, Zitai Wang, Qingming Huang

We pretrain graph autoencoders on these augmented graphs at multiple levels, which enables the graph autoencoders to capture normal patterns.

Fraud Detection Graph Anomaly Detection

A Unified Generalization Analysis of Re-Weighting and Logit-Adjustment for Imbalanced Learning

1 code implementation NeurIPS 2023 Zitai Wang, Qianqian Xu, Zhiyong Yang, Yuan He, Xiaochun Cao, Qingming Huang

However, existing generalization analysis of such losses is still coarse-grained and fragmented, failing to explain some empirical results.

When Measures are Unreliable: Imperceptible Adversarial Perturbations toward Top-$k$ Multi-Label Learning

1 code implementation27 Jul 2023 Yuchen Sun, Qianqian Xu, Zitai Wang, Qingming Huang

However, existing adversarial attacks toward multi-label learning only pursue the traditional visual imperceptibility but ignore the new perceptible problem coming from measures such as Precision@$k$ and mAP@$k$.

Adversarial Attack Multi-Label Learning

OpenAUC: Towards AUC-Oriented Open-Set Recognition

1 code implementation22 Oct 2022 Zitai Wang, Qianqian Xu, Zhiyong Yang, Yuan He, Xiaochun Cao, Qingming Huang

In this paper, a systematic analysis reveals that most existing metrics are essentially inconsistent with the aforementioned goal of OSR: (1) For metrics extended from close-set classification, such as Open-set F-score, Youden's index, and Normalized Accuracy, a poor open-set prediction can escape from a low performance score with a superior close-set prediction.

Novelty Detection Open Set Learning

Optimizing Partial Area Under the Top-k Curve: Theory and Practice

1 code implementation3 Sep 2022 Zitai Wang, Qianqian Xu, Zhiyong Yang, Yuan He, Xiaochun Cao, Qingming Huang

Finally, the experimental results on four benchmark datasets validate the effectiveness of our proposed framework.

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