学术报告
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A Two-Stage Optimal Subsampling Estimation for Missing Data Problems with Lar...题 目:A Two-Stage Optimal Subsampling Estimation for Missing Data Problems with Large-Scale Data报告人:王启华 研究员 (中国科学院)地点:腾讯会议室时间:2022年11月6日(周日) 20:00-21:30摘要:Subsampling is useful to downsize data volumes and speed up calculations for large-scale data and is well studied with completely observed data. In the presence of missing data, computation is more challe...王启华 研究员 (中国科学院)腾讯会议室2022年11月6日(周日) 20:00-21:30
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Some Problems in Integral and Convex Geometry题目:Some Problems in Integral and Convex Geometry报告人:周家足 教授(西南大学)地点:宁静楼115室时间:2022年10月19日 15:30-1630Abstract: We will address on some known problems that include the isoperimteric problem and the Minkowski problem in integral and convex geometry. Some recent works on these problems, especially solved by Chinese geometers, will be introduced .欢迎广大师生参加周家足 教授(西南大学)宁静楼115室2022年10月19日 15:30-16:30
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Penetrating Sporadic Return Predictability题目:Penetrating Sporadic Return Predictability报告人:涂云东 教授 (北京大学)地点:腾讯会议室时间:2022年10月13日 13:30-15:30摘要:Return predictability has been one of the central research questions in finance for many decades. This paper proposes a predictive regression with multiple structural changes to capture the sporadic predictive ability of potential predictors for the return series...涂云东 教授 (北京大学)腾讯会议室2022年10月13日 13:30-15:30
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Compressible Navier-Stokes Equations: Well-Posedness and Asymptotic Analysis题目:Compressible Navier-Stokes Equations: Well-Posedness and Asymptotic Analysis报告人:何凌冰 教授 (清华大学)地点:腾讯会议室时间:2022年10月13日(星期四) 14:00-16:00摘要:In these three lectures, we will talk about recent progress on the well-posedness and asymptotic analysis for the compressible Navier-Stokes equations in the whole space. After a quick survey of the equations, we will...何凌冰 教授 (清华大学)腾讯会议室2022年10月13日(星期四) 14:00-16:00
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新冠早期四级响应和目前动态清零的数学模型及其风险评估题目:新冠早期四级响应和目前动态清零的数学模型及其风险评估报告人:林支桂 教授(扬州大学)地点:腾讯会议 ID 529 120 244 密码:123456时间:2022年9月13日(星期二)下午19:00—20:00摘要:本报告拓展经典的SEAIR和时滞IJR传染病模型, 研究新冠病毒防控的两种模式。首先以新的加权网络模型为主线, 以四级应急响应防控措施为核心, 重点引入离散的扩散算子和对流算子刻画城市内和城市间的传播, 研究在公共卫生应急分级响...林支桂 教授(扬州大学)腾讯会议室2022年9月13日(星期二)19:00—20:00
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Actor-Critic Reinforcement Learning in Continuous Time and Space题目:Actor-Critic Reinforcement Learning in Continuous Time and Space报告人:贾颜玮 博士(哥伦比亚大学)地点:zoom线上会议 会议ID:86710704222, 密码:413890时间:2022年9月7日 21:30-22:30摘要:We study the actor-critic (AC) algorithms for reinforcement learning (RL) in continuous time and space under the regularized exploratory formulation developed by Wang et al. (2020). The first part of the...贾颜玮 博士(哥伦比亚大学)Zoom会议室2022年9月7日 21:30-22:30
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Inviscid limit of incompressible Navier-Stokes equationsDetermining the behavior of viscous flows at small viscosity is one of the most fundamental problems in fluid mechanics. In this talk, we focus on the incompressible flow and study the vanishing viscosity limit of incompressible Navier-Stokes equations. It mainly involves the following contents:陶涛 副教授 (山东大学)腾讯会议室2022年7月26-29日(星期二-星期五) 15:00-16:00
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Extremal metrics on toric manifolds and homogeneous toric bundlesAn example of Apostolovet al. indicates that the condition of K-stability may not be correct one for general polarized manifolds. Szekelyhidi modified definition of K-stability by filtration and stated a variant of the Yau-Tian-Donaldson conjecture. We will talk about our proof of this variant of YTD conjecture for toric manifolds and homogeneous toric bundles. This is jointed with Li An-Min and Lian Zhao.盛利 教授(四川大学)腾讯会议室2022年7月4日(星期一) 10:10-11:10