Search Results for author: Shengjie Zhang

Found 5 papers, 2 papers with code

Erasing Self-Supervised Learning Backdoor by Cluster Activation Masking

1 code implementation13 Dec 2023 Shengsheng Qian, Yifei Wang, Dizhan Xue, Shengjie Zhang, Huaiwen Zhang, Changsheng Xu

After obtaining the threat model trained on the poisoned dataset, our method can precisely detect poisonous samples based on the assumption that masking the backdoor trigger can effectively change the activation of a downstream clustering model.

backdoor defense Self-Supervised Learning

HiFi-Syn: Hierarchical Granularity Discrimination for High-Fidelity Synthesis of MR Images with Structure Preservation

no code implementations21 Nov 2023 Ziqi Yu, Botao Zhao, Shengjie Zhang, Xiang Chen, Jianfeng Feng, Tingying Peng, Xiao-Yong Zhang

To address these issues, we introduce hierarchical granularity discrimination, which exploits various levels of semantic information present in medical images.

Translation

Extrinsic Factors Affecting the Accuracy of Biomedical NER

no code implementations29 May 2023 Zhiyi Li, Shengjie Zhang, Yujie Song, Jungyeul Park

Biomedical named entity recognition (NER) is a critial task that aims to identify structured information in clinical text, which is often replete with complex, technical terms and a high degree of variability.

Data Augmentation named-entity-recognition +2

MouseGAN++: Unsupervised Disentanglement and Contrastive Representation for Multiple MRI Modalities Synthesis and Structural Segmentation of Mouse Brain

no code implementations4 Dec 2022 Ziqi Yu, Xiaoyang Han, Shengjie Zhang, Jianfeng Feng, Tingying Peng, Xiao-Yong Zhang

Our results demonstrate that MouseGAN++, as a simultaneous image synthesis and segmentation method, can be used to fuse cross-modality information in an unpaired manner and yield more robust performance in the absence of multimodal data.

Disentanglement Image Generation +1

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