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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Covariant Riesz transform on differential forms for $p\in (1,2]$
$pin （1，2]$ 微分形式 协变里斯变换
2023/4/28
In this talk, I will introduce the recent results on $L^p$-boundedness of covariant Riesz transform on differential forms on a class of non-compact weighted Riemannian manifolds for $p\in (1,2]$ witho...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Contact discontinuities in finitely long nozzles
有限长喷嘴 接触 不连续性 可压缩欧拉流
2023/5/4
There can be contact discontinuities in the nozzle for the compressible Euler flow. In this talk, we will talk about the cases of the subsonic-supersonic and supersonic-supersonic contact discontinuit...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Stokes phenomenon and isomonodromy deformation equations: Explicit solution to the Riemann-Hilbert problem and integrability of the isomonodromy equation
斯托克斯现象 等单向变形方程 黎曼-希尔伯特问题 显式解 单场方程 可积性
2023/5/6
Stokes phenomenon states that the asymptotic behavior of functions can differ in different regions of the complex plane, and that these differences can be described in a quantitative way. These quanti...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Stokes phenomenon and isomonodromy deformation equations: An introduction
斯托克斯现象 等单向变形方程 斯托克斯矩阵
2023/5/6
Stokes phenomenon states that the asymptotic behavior of functions can differ in different regions of the complex plane, and that these differences can be described in a quantitative way. These quanti...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：First-order methods for convex optimization and monotone inclusions under local Lipschitz conditions
局部利普希茨条件 凸优化 单调夹杂物 一阶方法
2023/5/6
In this talk, we first consider convex optimization whose smooth components have a locally Lipschitz continuous gradient and propose a first-order method for finding an epsilon-KKT solution. We then c...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Strong approximation and integral quadratic forms over affine curves
仿射曲线 强近似 积分二次形式
2023/5/9
Let $k$ be a field of characteristic 0 and let $C$ be the a smooth affine curve over $k$. We will first discuss applications of strong approximation to the theory of integral quadratic forms over $C$....
Last year, MIT researchers announced that they had built “liquid” neural networks, inspired by the brains of small species: a class of flexible, robust machine learning models that learn on the job an...
张海涛，工学博士，副教授，硕士生导师，CCF会员。主要研究方向大数据分析、网络与信息安全、智能信息处理。多年来一直从事计算机专业教学与科研工作，主持并参加的部级、省级科研项目有二十余项，通过部级、省级鉴定十余项，通过省市级专家验收十余项，并获得黑龙江省科学技术进步一等奖1项，黑龙江省科学技术进步三等奖2项，黑龙江省高校科学技术成果一等奖1项。参与国家自然科学基金重大研究计划项目3项，863项目2项...
杨悦，1980年11月生人，博士，副教授，硕士生导师，CCF会员。2003年毕业于哈尔滨工程大学计算机科学与技术专业获学士学位，2008年11月于哈尔滨工程大学计算机应用技术专业获得博士学位。2006年7月入职哈尔滨工程大学计算机科学与技术学院，历任助教、讲师、副教授，自入职以来一直从事计算机学科的教学与科研工作。目前的主要研究方向为大数据分析与处理、数据挖掘方法、社会网络分析、异质信息网络分析、...
Conference "Integrable Systems and Their Applications", Sept. 12-16, 2022
Conference Integrable Systems Applications
2022/9/14
The purpose of the conference is to establish international contacts for the subsequent involvement of world experts in cooperation with Russian scientists in the field of geometry and topology, dynam...
增广拉格朗日方法可以近似求解最小约束违背凸优化问题
拉格朗日方法 近似求解 最小约束 违背凸优化问题
2023/1/5
There are many important practical optimization problems whose feasible regions are not known to be nonempty or not, and optimizers of the objective function with the least constraint violation prefer...
国家天元数学西北中心于2022年6月21日至29日成功举办“孤立子和可积系统前沿理论讲习班”第三期活动。本期活动的主题是“Riemann-Hilbert方法与可积系统整体解的存在性”，活动邀请复旦大学范恩贵教授做主讲人，进行了连续七次的系列课程，详细讲授了Riemann-Hilbert方法在证明导数薛定谔方程整体解存在性中的深刻应用，阐述了可积系统理论在非线性偏微分方程适定性理论中取得的最新进展。...