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28

2017-12

H(div)-conforming HDG methods for the Brinkman equations

报告人：Guosheng Fu (Brown University)时间：2018年1月3日上午10：50-11：50地点：逸夫工商楼200-9报告厅摘要：We present new parameter-free superconvergent H(div)-conforming HDG methods for the Brinkman equations on both simplicial and rectangular meshes using a velocity gradient-velocity-pressure formulation. We obtain an optimal L2-error estimate for the velocity in both the Stokes...

28

2017-12

H(div)-conforming HDG methods for the Brinkman equations

28

2017-12

Positivity-preserving and symmetry-preserving conservative Lagrangian schemes for compressible Euler equations in 2D cylindrical coordinates

报告人：成娟（北京应用物理与计算数学研究所）时间：2018年1月3日上午9：45-10：45地点：逸夫工商楼200-9 报告厅摘要：There are two typical frameworks to describe the motion of fluid flow, that is, the Eulerian framework and the Lagrangian framework. In the Eulerian formulation the mesh is fixed in space, which makes these methods very suitable for flows with large deformations. O...

28

2017-12

Positivity-preserving and symmetry-preserving conservative Lagrangian schemes for compressible Euler equations in 2D cylindrical coordinates

26

2017-12

On Jantzen filtration of Weyl and Verma modules

12月27日下午 14:15--15:15，中科院数学所方明副研究员将在浙大玉泉校区工商楼四楼报告厅做如下学术报告：题目：On Jantzen filtration of Weyl and Verma modules 摘要：In this talk, I will discuss some connections between Jantzen filtration of Weyl and Verma modules, and also a comparison for Jantzen filtration of Weyl modules of different weights. 欢迎大家参加！

19

2017-12

（12月25日)Min-cost Bipartite Perfect Matching with Delays

报告题目: Min-cost Bipartite Perfect Matching with Delays报告人：王�弋博士（瑞士苏黎世联邦理工学院）时间: 12月25日下午4:00-5:00地点：玉泉校区工商楼2楼报告厅（200-9）摘要：The problem of min-cost matching with delays is an online problem defined on an underlying n-point metric space as follows. An adversary presents real-time requests online at points of the metric space, and ...

18

2017-12

(12月28日)席南华院士关于“数学的意义”的学术讲座

题目：数学的意义演讲人：席南华院士(中科院数学与系统科学研究院)演讲人介绍：席南华，1963年出生，湖南省衡阳市人，著名数学家，中国科学院院士。1988年获博士学位。主要从事代数群与量子群的表示理论研究，是国际上这一领域有重要影响的学者。现任中国科学院数学与系统科学研究院院长、研究员、博士生导师，曾任中国科学院大学副校长及中国数学会副理事长。曾获中科院青年科学家奖一等奖，晨兴数学银奖，陈省身数学奖，国家自然...

15

2017-12

(12月18日）Signal Separation based on Synchrosqueezing Transforms

时间：12月18日16：00 地点：工商楼200-9 题目：Signal Separation based on Synchrosqueezing Transforms 报告人：Qingtang Jiang, University of Missouri-St. Louis 摘要：Recently the synchrosqueezing transform (SST) has been developed for signal separation and a sharp time-frequency representation of a non-stationary signal by assigning the scale variable of the signal’s continuous wavelet transform to ...

14

2017-12

(12月19号)Sparse coding: Models, algorithms and applications

Sspeaker：Prof.Ji Hui(National University of Singapore)Title: Sparse coding: Models, algorithms and applicationsAbstract: In recent years, sparse coding has been widely used in many applications ranging from image processing to pattern recognition. The basic concept of sparse coding is to learn an over-complete dictionary from data over which the data can be spa...

12

2017-12

(12月28日）Holder estimates for homotopy operators on strictly pseudoconvex domains with C^2 boundary

Title: Holder estimates for homotopy operators on strictly pseudoconvex domains with C^2 boundarySpeaker: Professor Xianghong Gong (University of Wisconsin-Madison)Abstract: We derive a new homotopy formula for a strictly pseudoconvex domain of C^2 boundary in the complex Euclidean spaces for the d-bar operator. We obtain estimates for th...

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