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林野-城市交界域（wildland urban interface,以下简称WUI）是指城市区域与野生植被区域的交界地带。WUI中的人-火关系十分复杂。一方面，野火直接威胁到WUI内居民的生命和财产安全，其产生的有毒气体和PM2.5则会对健康造成长期影响；另一方面，人类通过增加引燃物、及时扑灭小型野火等多种方式塑造野火动态。WUI区域标示了野火能直接威胁人类社会的地区，了解WUI的分布与变化对评估...
高性能纤维在空间碎片撞击、冲击防护等高应变率场景有广泛的应用需求。碳纳米管具有轻质、高强、高模、高导电、高导热等优异特性，被认为是新一代高性能纤维的理想组装基元之一。受限于纤维组装结构的问题，碳纳米管纤维的强度仍远低于其理想强度，具有巨大的提升空间。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Global large strong solutions to the 2D radially symmetric compressible Navier-Stokes equations on bounded domain
有界域 二维径向对称 可压缩Navier-Stokes方程 全局大强解
2023/12/11
In this talk, I will present our recent result the 2D radially symmetric compressible Navier-Stokes equations with density-dependent viscosity. Under the condition of beta>1, we prove the global exist...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Well-balanced positivity-preserving high-order discontinuous Galerkin methods for Euler equations with gravitation
引力 欧拉方程 高阶间断 Galerkin方法
2023/11/29
We develop high order discontinuous Galerkin (DG) methods with Lax-Friedrich fluxes for Euler equations under gravitational fields. Such problems may yield steady-state solutions and the density and p...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Compressible fluid limit for the Landau equation
Landau方程 可压缩 流体极限
2023/11/29
We are concerned with the compressible Euler limit for smooth solutions to the Landau equation with Coulomb potentials in the whole space. Specifically, over any finite time interval where the full co...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Geometric regularity criteria and inviscid limit of incompressible Navier--Stokes Equations under Navier boundary condition
Navier边界条件 不可压缩 Navier-Stokes方程 几何正则性准则 无粘极限
2023/11/29
We report our recent works on the analysis of 3D incompressible Navier--Stokes Equations subject to the Navier slip boundary condition, i.e., tangential components of the stress exerted by the normal ...
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：Blowup of smooth solutions for compressible Navier-Stokes equations
可压缩 Navier-Stokes方程 光滑解 爆破
2023/11/15
In this talk，we discuss the finite time blow up phenomena of smooth solutions to the compressible Navier-Stokes system when the initial data contain vacuums. It is proved that any classical solutions ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Linear reciprocal transformations of bihamiltonian integrable hierarchies
双哈密尔顿 可积层次 线性互易变换 流体力学
2023/11/13
For an integrable hierarchy which possesses a bihamiltonian structure with semisimple hydrodynamic limit, we prove that the linear reciprocal transformation with respect to any of its symmetry transfo...
2024年8月4日，中国科大纳米科学技术学院（以下简称纳米学院）2020级硕士研究生高亮在国际学术刊物《科学》上以第一作者发表了题为“Intrinsically elastic polymer ferroelectric by precise slight cross-linking”的研究论文。中国科大为该成果参与完成单位。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Cartan-Helgason theorem for quaternionic symmetric pairs
四元数 对称对 Cartan-Helgason定理
2023/11/7
we present a joint work with Clemens Weiske and Genkai Zhang (Sweden). It shows a branching law for compact symmetric pairs K\subset G of quaternionic type. Precisely to say, K is a product of a simpl...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Prandtl Boundary Layer in An Infinitely Long Convergent Channel
无穷长 收敛通道 Prandtl边界层
2023/11/7
This talk is about the large Reynold number limits and asymptotic behaviors of solutions to the 2D steady Navier-Stokes equations in an infinitely long convergent channel. We will show that for a gene...
中国科学院北京纳米能源与系统研究所【Energy & Environmental Science】基于超材料结构的三维手性摩擦纳米发电机网络（图）
材料结构 三维手性摩擦 纳米发电机 网络
2024/3/27
当前气候问题逐渐成为世界面临的主要挑战之一，加快发展清洁能源对实现可持续发展具有重要意义，也是全球各国的共识。作为海洋中的主要可再生清洁能源储备之一，波浪能具有分布广泛、储量巨大的特点。开发利用波浪能是优化全球能源结构和实现碳中和的重要途径之一，然而，其在技术上也面临着极大的挑战。摩擦纳米发电机（triboelectric nanogenerator，TENG）为波浪能收集及其它海洋蓝色能源开发提...
