学术报告
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14
2024-09
Diffusion Models Respond the Duty Call from Causal Discovery题目:Diffusion Models Respond the Duty Call from Causal Discovery 报告人:王如心 副研究员(中国科学院深圳先进技术研究院) 摘要:Learning a faithful directed acyclic graph from observed data is a promising but challenging problem. Recent work formulate the pro...
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13
2024-09
多重假设检验和错误发现率控制题目:多重假设检验和错误发现率控制 报告人:李高荣 教授(北京师范大学统计学院) 摘要:随着现代科学技术的快速发展,大数据分析变得越来越重要,其中多重假设检验问题已经成为统计学研究的重要课题之一。本报告主要介绍多重假设检验和错误发现率(FDR)控制的一些思想、方法和理论,其中重点介绍最近发展起来的两个重要的多重假设检验方法:knockoff方法和镜像统计量方法。这两种方法无需计算p值而在近年来受到广泛关注, 成为当今统计学和机器学习最热点的研究领域。 ...
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13
2024-09
A rigidity result for ancient Ricci flows题目:A rigidity result for ancient Ricci flows 报告人:张旗 (美加州大学Riverside) 摘要:Using the sharp log Sobolev functional (log entropy), we prove a qualitatively sharp rigidity result for ancient Ricci flows without sign condition on the cur...
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10
2024-09
Variational estimation for multidimensional graded response model题目:Variational estimation for multidimensional graded response model 报告人:徐平峰 教授(东北师范大学前沿交叉研究院) 摘要:Likert-type items with ordinal responses are frequently utilized in tests to assess multiple latent traits. The multidimensional grad...
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10
2024-09
线性码的一个新的上界和部分权重码字的消去 -
07
2024-09
二阶椭圆非线性偏微分方程有限元离散系统的迭代两网格法题目:二阶椭圆非线性偏微分方程有限元离散系统的迭代两网格法 报告人:钟柳强 教授(华南师范大学) 摘要:首先,针对拟线性椭圆问题的协调有限元离散系统,设计和分析了相应的迭代两网格法; 其次, 针对拟线性椭圆问题的内罚间断有限元离散系统,证明了有限元解的存在唯一性和先验误差估计,并设计和分析了一种迭代两网格算法, 值得注意的是, 该算法的有效性依赖于迭代算法初值的选取, 为此需构造了一个相应的辅助变分问题. 最后, 针对强非线性椭圆问题的协调有限...
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02
2024-09
PDEs for neural assemblies; analysis, simulations and behavior but it could also be on tumor growthDistinguished Lecture Series in Mathematics 系列数学前沿学术讲座 报告题目:PDEs for neural assemblies; analysis, simulations and behavior but it could also be on tumor growth 报告人:Prof. Benoit Perthame(Laboratoire J.-L. Lions, Sorb...
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31
2024-08
Long time existence for surface waves Boussinesq systems题目:Long time existence for surface waves Boussinesq systems 报告人:徐丽 教授(北京航空航天大学) 摘要:We prove long time existence results for the solutions of Boussinesq system modeling the propagation of long, weakly nonlinear water waves. ...
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31
2024-08
A priori estimate for the water waves in a corner domain题目:A priori estimate for the water waves in a corner domain 报告人: 明梅 教授 (云南大学) 摘要:We prove a weighted a priori energy estimate for the two dimensional water-waves problem with contact points in the absence of gravity and sur...
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23
2024-08
Toric Einstein 4-manifolds with nonnegative sectional curvature题目:Toric Einstein 4-manifolds with nonnegative sectional curvature 报告人:刘天约(北京大学) 摘要:We study some interesting curvature properties of Einstein 4 manifolds in the presence of symmetry. In particular we show that the only ...