报告人:刘冲 (副教授) 陈杰虎 史隽彬 谭懿平 蔚京娟

报告地点：文津楼3425

报告时间：2024年1月10日下午2:30

主办单位：永利yl23411

报告一：New Rigorous Solutions Providing Insights into an Old Instability First Discovered Back in the 1960s

摘要：An old instability known as modulation instability first discovered back in 1960s is a central process in modern nonlinear science. While the development of advanced computational techniques has led to great progress in the numerical modeling of instabilities, rigorous analytic descriptions are far less common. Now, new rigorous solutions of vector nonlinear fields shine light on such an old instability. They are super-regular breathers in Manakov equations which has direct applications in optics and fluid dynamics. Here, we show how to construct such exact solutions by eigenvalue analysis and by finding the link G(ω) =γ∆Vg. In particular, we will highlight the role of the relation G(ω) =γ∆Vg in revealing the nature of the super-regular breathers in both the scalar and vector nonlinear systems.

报告人简介：刘冲，西北大学理论物理团队成员，入选陕西省“特支”计划、陕西省青年科技新星。主要研究方向包括可积系统理论及其实验实现。近年来，在精确描述两类调制不稳定性动力学方面建立了一般理论框架，并在PRL、CPL(Express Letter)、Physica D等学术期刊上发表多篇论文。

报告二：Open Set Few-Shot Remote Sensing Scene Classification Based on a Multiorder Graph Convolutional Network and Domain Adaptation

摘要：A method named the multiorder graph convolutional network (MGCN) is proposed for open set few-shot scene classification in remote sensing. MGCN employs feature dispersion degree weighting domain adaptation and multiorder graph convolution to diminish the dispersion degree among node features. Experimental results underscore the effectiveness of this approach in solving the classification challenge.

报告人简介：陈杰虎，永利yl23411博士生，入学时间为2019年9月，导师汪西莉。

报告三：延迟的公钥可搜索加密

摘要：一种时间维度搜索权限控制方法现有公钥可搜索加密存在数据提前泄露的风险，本报告将介绍延迟的公钥可搜索加密，支持时间维度搜索权限管控，保障数据不被提前泄露。

报告人简介：史隽彬，永利yl23411博士生，入学时间为2020年9月，导师禹勇。

报告四：随机波动对大脑中HIV-1感染的影响及其最优控制策略

摘要：In this talk, we focus on the complex dynamics of a stochastic HIV-1 infection model with cART in the brain involving two infected states, namely, productively infected state and latent infected state.

报告人：谭懿平，永利yl23411博士生，入学时间2021年9月，导师姚若侠。

报告五：基于区块链去中心化的密封逆向拍卖

摘要：本文提出了一个基于区块链的去中心化密封逆向拍卖系统，解决了电子拍卖中的隐私泄露和公平性问题。

报告人简介：蔚京娟，永利yl23411博士生，入学时间为2022年9月，导师李顺东。