Zhaohua Li

Phenomenological model for mixed multiphoton absorption in bialkali photocathode and application to ultrafast pulse characterization

2019 · Applied Physics Letters

We propose a phenomenological model composed of concise formulas to describe mixed multiphoton absorption (MPA), revealing its quasi-exponent-function in relation to intensity, complicated spectral features, and polarization dependence, and then demonstrate it perfectly by experiments …

Labels Are Culprits: Defending Gradient Attack on Privacy

2023 · IEEE Internet of Things Journal

Federated learning (FL) is widely studied for local privacy protection, and it involves exchanging model parameters rather than raw data among clients. However, gradient attacks (GAs) make a malicious client or parameter server of FL …