Zihan Zhang
7 papers in the PaperMetrix corpus
Papers by this author
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A New Metric on Symmetric Group and Application to Block Permutation Codes.
2021 · arXiv (Cornell University)
Permutation codes have received a great attention due to various applications. For different applications, one needs permutation codes under different metrics. The generalized Cayley metric was introduced by Chee and Vu [4] and this metric …
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Model-Free Reinforcement Learning: from Clipped Pseudo-Regret to Sample\n Complexity
2020 · arXiv (Cornell University)
In this paper we consider the problem of learning an $\\epsilon$-optimal\npolicy for a discounted Markov Decision Process (MDP). Given an MDP with $S$\nstates, $A$ actions, the discount factor $\\gamma \\in (0,1)$, and an\napproximation threshold $\\epsilon …
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Enhancing Adjoint Optimization-Based Photonic Inverse Design with Explainable Machine Learning
2022 · ACS Photonics
A fundamental challenge in the design of photonic devices, and electromagnetic structures more generally, is the optimization of their overall architecture to achieve a desired response. To this end, topology or shape optimizers based on …
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Automatic Generation of Adversarial Readable Chinese Texts
2022 · IEEE Transactions on Dependable and Secure Computing
Natural language processing (NLP) models are known vulnerable to adversarial examples, similar to image processing models. Studying adversarial texts is an essential step to improve the robustness of NLP models. However, existing studies mainly focus …
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HD-Eval: Aligning Large Language Model Evaluators Through Hierarchical Criteria Decomposition
2024
Yuxuan Liu, Tianchi Yang, Shaohan Huang, Zihan Zhang, Haizhen Huang, Furu Wei, Weiwei Deng, Feng Sun, Qi Zhang. Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers). 2024.
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Identity Deepfake Threats to Biometric Authentication Systems: Public and Expert Perspectives
2025 · arXiv (Cornell University)
Generative AI (Gen-AI) deepfakes pose a rapidly evolving threat to biometric authentication, yet a significant gap exists between expert understanding of these risks and public perception. This disconnection creates critical vulnerabilities in systems trusted by …
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PromptBERT: Improving BERT Sentence Embeddings with Prompts
2022
Ting Jiang, Jian Jiao, Shaohan Huang, Zihan Zhang, Deqing Wang, Fuzhen Zhuang, Furu Wei, Haizhen Huang, Denvy Deng, Qi Zhang. Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing. 2022.