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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Some new algorithm developments on highly stiff stable schemes and on a SAV based approach for optimization problems
高刚性稳定方案 基于SAV 优化方法 新算法发展
2023/11/29
In the first part, I shall present a new way to construct highly stiff stable schemes. Traditional time discretization schemes are usually based on Taylor expansions at $t_{n+\beta}$ with $\beta\in [0...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：On the construction of solutions to some inviscid free boundary problems
无粘 自由边界 解构造
2023/11/15
We will present our recent results on the local well-posedness of free boundary problems for some inviscid fluids. In particular, for each problem the solution is constructed as the vanishing viscosit...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars： On the construction of solutions to some inviscid free boundary problems
无粘 自由边界 问题解 构造
2023/12/11
We will present our recent results on the local well-posedness of free boundary problems for some inviscid fluids. In particular, for each problem the solution is constructed as the vanishing viscosit...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Unit commitment problems and their compact and simple models, algorithms, and applications
Unit commitment problems 机组组合 电力系统优化
2023/4/14
机组组合(UC)作为电力系统优化运行的基本问题之一，其模型的质量严重影响着求解器的求解效率，如何建立高质量的UC问题模型则成为近年研究的热点。为此，我们从大规模电力系统UC问题的模型、算法和应用方面展开研究，主要内容包括：针对单机组组合(1UC)问题，基于Facet、凸包以及动态规划相关理论，研究全新的1UC问题统一建模框架，给出1UC问题一系列适用于不同场景、不同算法的高质量模型；基于滑动窗口、...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Quantum Algorithms for High-Dimensional Sampling Problems
高维采样 量子算法 高维抽样问题
2023/4/14
High-dimensional sampling problems are ubiquitous in statistics, operations research, machine learning, etc. In this talk, I will introduce quantum algorithms for two important problems in high-dimens...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Deep neural network approximation to inverse conductivity problems for elliptic equations
椭圆方程 反电导率 深度神经网络
2023/4/14
The focus of this talk is on the numerical methods used to identify parameters in partial differential equations. Typically, an optimization approach is used to solve this class of inverse problems, w...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Fast and accurate solvers for the three dimensional elastic scattering problems
三维弹性 散射 求解器 弹性波
2023/4/26
The scattering problems for elastic waves have recently received ever increasing attentions in both the engineering and mathematical communities for their important applications in geophysics and seis...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Introduction to Peridynamics model and a POD-based fast algorithm for the nonlocal unsteady problems
近场动力学模型 POD 非局部 非定常问题 快速算法
2023/5/6
A brief introduction to Peridynamics model and a fast algorithm for the nonlocal unsteady problems is given in this talk. The POD algorithm can be employed in the numerical simulation of nonlocal diff...
Today, the Harvard University Data Science Initiative announced the AWS Impact Computing Project at the HDSI, a collaboration with Amazon Web Services (AWS) aimed at reimagining data science to identi...
首都师范大学X射线CT技术研发团队在国际著名期刊《Inverse problems》发表论文（图）
首都师范大学 X射线 CT技术 Inverse problems 成像理论 印制电路板 太阳能板
2019/3/1
近日，以首都师范大学数学科学学院、北京成像理论与技术高精尖创新中心徐金秋、赵云松、李宏伟、张朋署名的研究论文“An Image Reconstruction Model Regularized by Edge-preserving Diffusion and Smoothing for Limited-angle Computed Tomography”（DOI：10.1088/1361-6420...
HACKING SPATIAL DATA: AN EXAMPLE OF AGGREGATION PROBLEMS
Spatial aggregation Spatial data science Hacking spatial data Spatial autocorrelation
2018/11/8
Many applications using spatially aggregated data tend to treat the spatial units as given. For example, in the United States, analyses using the social and economic data often rely on the existing an...
Many problems in mechanics involve deformable domains with moving boundaries. Examples include fluid-structure interaction, free surface flows, flows over soft tissues and textiles, flows involving ac...
IUTAM Symposium on Recent advances in moving boundary problems in mechanics
Deformation domain Move the border Solid coupling Free surface flow , the structure resonance
2017/12/13
Many problems in mechanics involve deformable domains with moving boundaries. Examples include fluid-structure interaction, free surface flows, flows over soft tissues and textiles, flows involving ac...
三亚国际数学论坛：Modeling,Analysis,Simulations and Applications of Inter-Facial Dynamics and FSI Problems
三亚国际数学论坛 Modeling Analysis Simulations Applications Inter-Facial Dynamics and FSI Problems
2017/11/24
The focus of the workshop will be on mathematical modeling and analysis of interface dynamics problems, and fluid interaction problems, the theory and analysis of the related partial differential equa...
Study Shows How Rough Microparticles Can Cause Big Problems（图）
Rough Microparticles Big Problem
2017/10/26
To assess the role of particle roughness in the rheological phenomena of concentrated colloidal suspensions we develop model colloids with varying surface roughness length scales up to 10% of the part...