欧宝体育平台_G1(欢迎您)

欧宝体育平台

“学术讲座”课程报告报名、名单公示通知(2018级,更新12.15、12.16、12.17讲座)

来源:欧宝体育平台 发布时间:2021-07-06   8081


23. Activation discovery with FDR control: Application to fMRI data

/2021/1214/c38073a2451347/page.htm

时间:12月17日(周五)09:00-10:00

地点:腾讯会议ID:615 465 700

参加名单:12月17日0900_1000-线上.xls


22. 12月第三周讲座

(1)On analogues of modular units for the moduli stack of Drinfeld shtukas

/2021/1210/c38073a2450258/page.htm

时间:12月15日(周三)15:00-16:00

地点:ZOOM会议ID:970 2662 9834(密码:499643)

链接:https://zoom.us/j/97026629834?pwd=eml5aklsSzI5NzJnODZtTG9Kajl6QT09

参加名单:12月15日1500_1600-线上.xls

(2)The Neyman-Pearson lemma for convex expectations

(<北京大学数量经济与数理金融教育部重点实验室>学术报告)

报告人:Shaolin Ji(Shandong University)

嵇少林,现为山东大学金融研究院教授、博士生导师,师从彭实戈院士。1999年至今在山东大学工作。研究领域为金融数学、金融经济学、随机优化和非线性期望理论。近年来,嵇少林在《Review of financial studies》, 《Operations research》,《Probability theory and the related fields》和《SIAM Control and Optimization》等杂志上发表了一系列的成果。对金融市场中的学习理论、资本资产定价、随机优化问题和非线性期望理论进行了系统的研究。

时间:12月16日(周四)14:00-15:00

地点:腾讯会议ID:347 351 716(密码:123456)

链接:https://meeting.tencent.com/dm/Vfd96CjsIs63

摘要:We study the Neyman-Pearson theory for convex expectations or equivalent convex risk measures on L^{∞}(μ). Without assuming that the level sets of penalty functions are weakly compact, a fixed representative pair (P^{∗},Q^{∗}) is found by a new method different from the convex duality method. Then we show that the optimal tests are just the classical Neyman-Pearson tests between the representative probabilities P^{∗} and Q^{∗}. Finally, we apply our results to a shortfall risk minimizing problem in an incomplete financial market.  (With Chuanfeng Sun).

参加名单:12月16日1400_1500-线上.xls


21. 12月第二周讲座

(1)Collapsing Geometry of Hyperkaehler Four-Manifolds

报告人:Ruobing Zhang(Princeton University)

Ruobing Zhang is currently an assistant professor at Princeton University. He obtained his Ph.D. at Princeton University in 2016 under the supervision of Alice Chang and Paul Yang. His research focuses on differential geometry and geometric analysis.

时间:12月8日(周三)09:00-10:00

地点:ZOOM会议ID:841 8772 1220(密码:430726)

链接:https://us02web.zoom.us/j/84187721220?pwd=b0h3V0RLZnVmSWRCS0ErcDJkNFYrUT09

摘要:This talk focuses on the recent resolution of the following three well-known conjectures in the study of Ricci-flat four manifolds (joint with Song Sun).

(1) Any volume collapsed limit of unit-diameter hyperkaehler metrics on the K3 manifold is isometric to one of the following: the quotient of a flat 3D torus by an involution, a singular special Kaehler metric on the topological 2-sphere, or the unit interval.

(2) Any complete non-compact hyperkaehler 4-manifold with quadratically integrable curvature, namely gravitational instanton, must have one of the following asymptotic model geometries: ALE, ALF, ALG, ALH, ALG* and ALH*.

(3) Any gravitational instanton can be compactified to an open dense subset of certain compact algebraic surface.

With the above classification results, we obtain a rather complete picture of the collapsing geometry of hyperkaehler four manifolds, i.e., classifications of Gromov-Hausdorff limit geometries, tangent cones, singularity formations, as well as all the rescaling bubbles.

参加名单:12月8日0900_1000-线上.xls

(2)A spectral accurate solver for the elastic scattering problems based on spherical harmonics

报告人:赖俊(浙江大学)

赖俊,南京大学数学系本科,美国密西根州立大学应用数学博士毕业,曾任纽约大学柯朗数学研究所博士后及讲师,目前任欧宝体育平台“百人计划”研究员,主要研究声波,电磁波及弹性波方程的散射与反散射问题,在数学知名杂志ACHA,SISC,Math Comp,Inverse Problems等发表文章多篇,主持国家面上项目一项,并参与基金委重大研究计划,基金委创新群体等研究,曾入选中组部高层次青年人才计划,获十一届全国反问题年会“优秀青年学术奖”。

时间:12月9日(周四)10:00-12:00

地点:腾讯会议ID:921 659 018(密码:1234)

链接:https://meeting.tencent.com/dm/B2dat2VcjZG0

摘要:The scattering problems for elastic waves have recently received ever increasing attention in both the engineering and mathematical communities for their important applications in geophysics and seismology. In this talk we mainly discuss a spectral accurate solver for elastic scattering problems in three dimensions. In particular, we formulate the elastic problem by boundary integral equations. Through the Helmholtz decomposition, we split the elastic wave field into the compressional wave and shear wave. We apply the rotated vector spherical harmonics as the basis to discretize the coupled boundary integral equation. The well-posedness of the coupled system, as well as its applications to the multi-particle elastic scattering will also be discussed.

参加名单:12月9日1000_1200-线上.xls


20. 12月第一周讲座

(1)A snapshot of serrano's conjecture

报告人:刘海东(中山大学,Sun Yat-sen University)

时间:12月1日(周三)16:00-17:00

地点:腾讯会议ID:790 778 401(密码:428474)

摘要:Strictly nef divisors sit between nef divisors and ample divisors. A natural question is how far are strictly nef divisors from being ample. In this area, Serrano's conjecture predicts that after twisting by the canonical divisor a little bit, the adjoint strictly nef divisor should be ample. In this talk, I will survey some recent progress on this conjecture. (Part of my works is jointed with Roberto Svaldi, part is jointed with Shin-ichi Matsumura.)

参加名单:12月1日1600_1700-线上.xls

(2)Least squares model averaging and its extensions

/2021/1129/c38073a2446505/page.htm

时间:12月2日(周四)14:00

地点:腾讯会议ID:307 424 966

参加名单:12月2日1400_1500-线上(least).xls

(3)Spatial signs and ranks based high-dimensional change point detection via random integration

报告人:张伟平 教授(中国科学技术大学)

时间:12月2日(周四)14:00-15:30

地点:腾讯会议ID:556 2454 9135

摘要:Detecting change points is an important task in time series analysis to identify an abrupt and significant change in the data generating process. Most of the existing methods for change point detection are based on Hotelling's T2 type statistics, which are unreliable in high-dimensional situations due to the requirement for the consistent estimation of the covariance matrix. This paper proposed a novel nonparametric method to overcome this issue by using spatial signs and ranks random integration idea, which is tailored to high-dimensional change point detection problems. This random integration-based method is a unified framework that includes and extends many existing methods and can effectively handle high-dimensional non-normal data. In addition, we developed a generalized computationally efficient algorithm to calculate the rejection thresholds and an effective post-signal diagnostic procedure to identify the potential directions. Finally, numerical studies together with real data examples demonstrated that the proposed method can identify the change point efficiently.

参加名单:12月2日1400_1530-线上(spatial).xls


19. 11月第四周讲座

(1)Softplus INGARCH Model

/2021/1116/c38073a2442236/page.htm

时间:11月19日(周五)09:00

地点:腾讯会议ID:788 902 078

参加名单:11月19日0900_1000-线上.xls

(2)On efficient dimension reduction with respect to the interaction between two response variables

报告人:骆威,2014年毕业于美国宾夕法尼亚州立大学,之后任职于美国Baruch College,于2018年加入浙江大学。骆威的研究方向包括充分降维和因果推断,在Annals of Statistics, Biometrika, JRSSB等统计国际学术期刊上发表(含接收)了多篇论文。

时间:11月25日(周四)14:00-15:30

地点:腾讯会议ID:925 141 454https://meeting.tencent.com/dm/i2FXK5QrLwgz

摘要:In this talk, we propose the novel theory and methodologies for dimension reduction with respect to the interaction between two response variables, which is a new research problem that has wide applications in missing data analysis, causal inference, and graphical models, etc. We formulate the parameters of interest to be the locally and the globally efficient dimension reduction subspaces, and justify the generality of the corresponding low-dimensional assumption. We then construct estimating equations that characterize these parameters, using which we develop a generic family of consistent, model-free, and easily implementable dimension reduction methods called the dual inverse regression methods. We also build the theory regarding the existence of the globally efficient dimension reduction subspace, and provide a handy way to check this in practice. The proposed work differs fundamentally from the literature of sufficient dimension reduction in terms of the research interest, the assumption adopted, the estimation methods, and the corresponding applications, and it potentially creates a new paradigm of dimension reduction research. Its usefulness is illustrated by simulation studies and a real data example at the end.

参加名单:11月25日1400_1530-线上.xls

(3)Quantile difference estimation with censoring indicators missing at random

/2021/1118/c38073a2442904/page.htm

时间:11月25日(周四)16:00

地点:工商楼200-9

参加名单:11月25日1600_1700-线下.xls


18. 11月第三周讲座

(1)生物医学数据发掘的融合方法

/2021/1110/c38073a2440309/page.htm

时间:11月12日(周五)15:00

地点:腾讯会议ID:623 287 888(密码:310027)

参加名单:11月12日1500_1600-线上.xls

(2)Sample-wise Combined Missing Effect Models with Penalization

/2021/1105/c38073a2438963/page.htm

时间:11月15日(周一)14:00

地点:腾讯会议ID:559 530 381

参加名单:11月15日1400_1500-线上.xlsx


17. 概率统计学术报告(20211111)

题目:Credit Risk Propagation in Structural-Form Models

/2021/1104/c38073a2438852/page.htm

时间:11月11日(周四)10:00-11:00

地点:工商楼200-9

参加名单:11月11日1000_1100-线下.xls


16. Geometric inequalities inspired by algebraic geometry

报告人:Jian Xiao(Tsinghua University)

时间:11月3日(周三)16:00-17:00

地点:腾讯会议ID:184 722 527(密码:825882)

摘要:Geometric inequalities reveal relation between different geometric invariants, such as volume, surface area, width, diameter, etc. By the correspondences between convexity and positivity, such as mixed volumes of convex bodies and intersection numbers of divisors, we present a series of new geometric inequalities inspired by positivity results in algebraic and analytic geometry.

参加名单:11月3日1600_1700-线上.xls


15. 浙江大学概率统计学术报告

(1)Auto-reservoir neural network for multistep-ahead prediction

/2021/1022/c38073a2433417/page.htm

时间:10月27日(周三)14:00-15:00

参加名单:10月27日1400_1500-线上.xlsx

(2)大数据时代下基于人工智能算法的药物相关预测研究

/2021/1022/c38073a2433446/page.htm

时间:10月27日(周三)10:00-11:00

地点:腾讯会议ID:657 471 697(线上)

参加名单:10月27日1000_1100-线上.xlsx


14. 海量数据驱动场景及其数据科学方法

报告人:李丰 副教授(中央财经大学)

时间:10月24日(周日)16:00-17:00

地点:Online(Tecent Meeting)

腾讯会议ID:804 4124 3260

摘要: 随着海量数据的涌现,全新的商业管理和决策场景依赖灵活高效的数据科学方法。只有熟练运用针对复杂数据的数据科学工具,才以满足海量实时数据快速响应需求。特别的,在分布式存储和计算的新常态下,依赖分布式平台上的实时数据科学方法可以提供最佳商业决策。这对人才能力有了前所未有的挑战。如何快速在数据浪潮中迅速学习并自我提升将会成为将来的关键。本报告通过介绍海量数据驱动场景及其数据科学方法,为将来志在数据驱动的新兴领域的同学知识储备和能力提升提供一些启发。

报告人信息:李丰博士现任中央财经大学统计与数学学院副院长、副教授。博士毕业于瑞典斯德哥尔摩大学,研究领域包括贝叶斯统计学,预测方法,大数据分布式学习等。曾获瑞典皇家统计学会Cramér奖,主持和参与多项国家自然科学基金项目。李丰博士最新研究成果发表在统计期刊Journal of Computational and Graphical Statistics,Journal of Business and Economic Statistics,经济与管理学期刊International Journal of Forecasting等,同时著有Bayesian Modeling of Conditional Densities,《大数据分布式计算与案例》和《统计计算》。李丰博士在世界贝叶斯大会,国际预测大会等作过邀请报告。

参加名单:10月24日1600_1700-线上.xlsx


13. The inverse Gauss curvature flow and Orlicz Minkiwski problem

报告人:赵培标 教授(南京理工大学)

时间:10月23日(周六)10:00-11:00

地点:Online(Tecent Meeting)

腾讯会议ID:284 297 954

摘要:In this note, we investigate a inverse gauss curvature flow, and obtain the long-time existence and convergence of this flow. As an application, we derive the existence of non-even smooth solution to the Orlicz-Minkowski problem.

参与名单:10月23日1000_1100-线上.xlsx


12. Identification and estimation of nonignorable missing outcome mean without identifying the full data distribution

报告人:李伟(中国人民大学统计学院)

时间:10月20日(周三)10:30-12:00

地点:Online(Tecent Meeting)

腾讯会议ID:979 3153 9451

摘要:We consider the problem of making inference about the population outcome mean of an outcome variable subject to nonignorable missingness. By leveraging a so-called shadow variable for the outcome, we propose a novel condition that ensures nonparametric identification of the outcome mean, although the full data distribution is not identified. The identifying condition requires the existence of a function as a solution to a representer equation that connects the shadow variable to the outcome mean. Under this condition, we use sieves to nonparametrically solve the representer equation and propose an estimator which avoids modeling the propensity score or the outcome regression. We establish the asymptotic properties of the proposed estimator. We also show that the estimator is locally efficient and attains the semiparametric efficiency bound for the shadow variable model under certain regularity conditions. We illustrate the proposed approach via simulations and a real data application on home pricing. The paper is available at http://arxiv.org/abs/2110.05776.

报告人信息:李伟,中国人民大学统计学院,生物统计与流行病学系讲师,北京大学欧宝体育平台博士。主要研究领域为因果推断、缺失数据、高维统计等。目前已在包括Biometrika, Journal of Econometrics, Biometrics等国际著名统计期刊上发表多篇学术论文。主持一项国家自然科学青年基金项目,参与完成多项国家自然科学基金面上项目。

参加名单:10月20日1030_1200-线上.xlsx


11. Distinguished Colloquium——Orbit Method: From Matrices to Unitary Representations

报告人:Chen-Bo Zhu (National University of Singapore)

时间:10月15日(周五)09:00-10:00

地点:Online(Zoom Meeting)

Zoom ID:819-3008-5234(密码:983788)

会议链接:https://zoom.us/j/81930085234?pwd=UDZ6bC9jRERGak1PMTdzbURUcDdidz09

摘要:The talk is intended as a leisurely introduction to one of the fundamental tasks of representation theory: the construction of irreducible unitary representations. I will first discuss two major sources of unitary representations of Lie groups, one from Symplectic Geometry (Kirillov theory) and another from Number Theory (Langlands philosophy).  I will then introduce a constructive method called theta lifting which has been fruitful for representations of classical groups and discuss some recent applications of this method to unitary representation theory.

报告人信息:Chen-Bo Zhu is a professor of mathematics at the National University of Singapore (NUS), having first joined NUS in 1991. He received his BSc from Zhejiang University, China in 1984, and his PhD from Yale University, USA in 1990. His research interests are in representation theory of Lie groups. Together with his collaborators, he has contributed to the branching problem of smooth representations, the theory of local theta correspondence, and recently his focus has been on unitary representation theory. He is a fellow of the Singapore National Academy of Science.

参加名单:10月15日0900_1000-线上.xlsx


10. Period Relations of Standard L-functions of Symplectic Type

报告人:田昉旸 博士(欧宝体育平台)

时间:9月24日(周五)10:30-11:30

地点:玉泉校区工商楼200-9(限额20人)

摘要:A classical result of Euler says that the value of the Riemann-Zeta function at a positive even integer $2k$ is a rational multiple of $\pi^{2k}$. In the 1970s, a successive pioneering work of G. Shimura revealed the relation of different critical values of $L$-function that are attached to modular forms of $\mathrm{GL}_2$. This type of result, conjectured by D. Blasius for general linear groups, is called period relation of a certain automorphic $L$-function, which is closely related to a celebrated conjecture of P. Deligne.
    In this talk, I will discuss my work joint with Dihua Jiang and Binyong Sun on the period relation for the twisted standard L-function $L(s, \Pi\otimes\chi)$, where $\Pi$ is an irreducible cuspidal automorphic representation of $GL_{2n}(\mathbb{A})$ which is regular algebraic and of symplectic type.  Along this talk, I will also discuss the key ingredient of this project - the existence of uniform cohomological test vector, which provides the most precise information on the archimedean local integrals.

参加名单:9月24日1030_1130讲座-线下.xlsx


9. Asymptotics for the matrix-valued Keller-Rubinstein-Sternberg problem

报告人:王伟 研究员(浙江大学)

时间:9月15日(周三)14:30-15:30

地点:腾讯会议

腾讯会议ID:116 386 443(密码:0915)

报告摘要:We will talk about the asymptotical behaviour of a matrix-valued Allen-Cahn equation when a small parameter tends to zero. Precisely, we show that the limit system is a two-phases flow system: the phase interface evolves according to the mean curvature flow; in two bulk phase regions, the solution obeys the harmonic map heat flow into two different manifolds; on the interface, the phase matrices in two sides satisfy a novel mixed boundary condition.

The proof follows the roadmap developed by de Mottoni-Schatzman and Alikakos-Bates-Chen: we first construct an approximate solution solving the regularized system up to arbitrary small terms, and then we prove a spectral lower bound for the linearized operator around it, and finally we estimate the difference between the true solution and the approximate solution. The main difficulties come from the inherent (partially minimal pairing) property of this problem.

This is joint work with Mingwen Fei, Fanghua Lin and Zhifei Zhang.

参加名单:9月15日1430_1530-线上.xlsx


8. Social Proximity and Bank Lending

报告人:杨晓光,中国科学院数学与系统科学研究院研究员,中国科学院系统科学研究所副所长,中国系统工程学会理事长,欧亚系统科学研究会副理事长,曾获复旦管理学杰出贡献奖、中国青年科技奖、茅以升青年科技奖等奖项。

时间:9月14日(周二)10:00-11:00

地点:腾讯会议

腾讯会议ID:112 930 838(密码:200433)

报告摘要:Using a proprietary data set, we explore the role of social proximity in bank lending. We uncover evidence of a significant social proximity effect on private information acquisition. Local loan officers have better information to identify higher-quality borrowers through improved screening. This advantage is greater when firms have higher information asymmetry and lower ratings. Results suggest that sociocultural resources drive locals' informational advantages and improve their lending performance.

参加名单:9月14日1000_1100-线上.xlsx


7. Nesterov加速与高精度微分方程

报告人:史斌,中国科学院数学与系统科学研究院副研究员,入选中科院百人计划

时间:9月10日(周五)16:00-17:00

地点:腾讯会议

腾讯会议ID:242 107 980

链接:https://meeting.tencent.com/dm/0rZ8JAI8p0qL?rs=25

报告摘要:连续的常微分方程是用来学习以梯度为基础的优化算法。现存的连续极限的常微分方程无法区分强凸函数情况下的Nesterov加速算法和Polayk重球法,在这里,我们引进物理学中简化复杂微分方程的连续逼近的思想,采用一阶逼近所生成常微分方程,成为高精度微分方程。我将展示:(1)这些高精度的微分方程提供一个一般性的Lyapunov框架来分析连续时间和离散时间的收敛性。这些高精度微分方程拥有着更精确的替代,不仅可以区分强凸函数的Nesterov加速算法和Polyak重球法,更是可以发现特殊的一项“梯度矫正项”存在于强凸函数下的Nesterov加速算法中,而不存在于Polyak重球法中,从本质上区别了这两个算法。(2)对于一般凸函数意义下的Nesterov加速算法,通过这个高精度常微分方程框架,我们发现了其梯度模的平方自身就有O(1/k^3)的收敛速度。(3)同时对于alpha>3时,更一般的Nesterov加速算法,通过我们的高精度微分方程框架,我们可以获得更进一步的结果,猜测其梯度模的平方可能有O(1/k^3)的收敛速度。

参加名单:9月10日1600_1700-线上.xlsx


6. The Unconditional Uniqueness for the Energy-critical and Supercritical NLS

报告人:陈旭文(Department of Mathematics, University of Rochester)

时间:7月12日 10:00-11:00

地点:工商楼200-9

链接:/2021/0707/c38073a2403799/page.htm

报告摘要:We prove the unconditional uniqueness for the R^d/T^d cubic/quintic energy-critical and supercritical NLS.

参加名单:7月12日1000_1130-线下.xlsx


5. 吴文俊数学重点实验室组合图论系列讲座3

题目:Basis-finding algorithm for decoding fountain codes for DNA storage

报告人:Xuan He, Southwest Jiaotong University, China

时间:7月10日 16:30-17:30

地点:Online(Tecent Voov meeting)

腾讯会议ID:630 503 561

链接:https://meeting.tencent.com/s/lRJQ8tW5hNBl

报告摘要:Due to its extremely high storage density, longevity, and low maintaining cost, DNA storage becomes a promising candidate for archiving massive data in the future. Up to now, the DNA fountain scheme achieves the highest net information density (1.57bits/nt). However, it adopts a decoding algorithm for fountain codes, which can only work for correct received symbols and is thus not efficient enough for the DNA storage scenario where some received symbols may have undetected errors. This motivates us to propose a basis-finding algorithm (BFA). The BFA is the only known efficient hard-decision decoding algorithm for fountain codes for the general scenario where there exist some erroneous received symbols. This report gives a brief review of the DNA storage, DNA fountain scheme, and BFA.

参加名单:7月10日1630_1730-线上.xlsx


4. 吴文俊数学重点实验室组合图论系列讲座2

题目:Improved Coding over Sets for DNA-Based Data Storage

报告人:Hengjia Wei, Ben-Gurion University, Israel

时间:7月10日 15:30-16:30

地点:Online(Tecent Voov meeting)

腾讯会议ID:630 503 561

链接:https://meeting.tencent.com/s/lRJQ8tW5hNBl

报告摘要:In this talk, we look at error-correcting codes over sets, which have applications to DNA-based data storage. The DNA-storage channel receives a set of sequences, and produces a corrupted version of the set, including sequence loss, symbol substitution, and symbol insertion/deletion. We study two parameter regimes. New bounds on code parameters are provided, which improve upon known bounds. New codes are constructed, at times matching the bounds up to lower-order terms or small constant factors.

参加名单:7月10日1530_1630-线上.xlsx


3. 吴文俊数学重点实验室组合图论系列讲座1

题目:Non-overlapping codes

报告人:Qi Wang, Southern University of Science and Technology, China

时间:7月10日 14:30-15:30

地点:Online(Tecent Voov meeting)

腾讯会议ID:630 503 561

链接:https://meeting.tencent.com/s/lRJQ8tW5hNBl

报告摘要:Non-overlapping codes have been investigated for decades, and have recently found important applications in DNA storage systems. In this talk, I will first survey important results on non-overlapping codes, and then talk about some recent new results.

参加名单:7月10日1430_1530-线上.xlsx


2. Profinite completion and surface mapping classes

报告人:Yi Liu (Beijing International Center for Mathematical Research, Peking University)

时间:6月24日 15:00-16:30

地点:Lecture Hall, Institute for Advanced Study in Mathematics, No.7 teaching building

参加名单:6月24日1500_1630-线下.xlsx


1. 数学及其交叉学科前沿论坛第一期

题目:高超声速发动机物理基础和数学问题

报告人:姜宗林

时间:6月18日 14:00-16:00

地点:紫金港数学高等研究院一楼报告厅

参加名单:6月18日1400_1600-线下.xlsx


Copyright © 2020 欧宝体育平台    版权所有

    浙ICP备05074421号

技术支持: 创高软件     管理登录

    您是第 1325792 位访问者