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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于临界理论的复杂制造系统风险传播预警和控制
临界理论 复杂制造 系统风险 传播预警 控制
2023/5/5
复杂制造系统在生产过程中存在诸多的内外部风险。作为一个对初始条件极为敏感的混沌系统，即便是微小的风险，随着生产制造过程的推进，这些风险也会不断被传递、累计、放大，最终将极大拖延生产进度，或者是系统制造生产稳定性下降，严重时甚至造成整个复杂制造系统生产的混乱和中断。通过针对典型的复杂制造系统仿真数据，引入神经网络学习机制，建模系统风险因子与模型；基于熵理论和临界慢化理论完成复杂制造系统临界态物理指标...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：ANALYSIS AND APPROXIMATION OF FLUIDS UNDER SINGULAR FORCING
奇异强迫体 分析 近似 牛顿流体
2023/5/5
Motivated by applications, like modeling of thin structures immersed in a fluid, we develop a well posedness theory for Newtonian and some non-Newtonian fluids under singular forcing in Lipschitz doma...
第一届全国能源转化储存与CCUS渗流会议暨湖北省第四届渗流力学前沿论坛于2022年11月26日以在线直播的形式成功召开。会议由中国力学学会流体力学专业委员会渗流力学专业组、湖北省岩石力学与工程学会主办，中国科学院武汉岩土力学研究所、中国科学院力学研究所、MDPI和中国岩石力学与工程学会低碳能源岩石力学与工程专业委员会承办，中国石油勘探开发研究院、中盐盐穴综合利用股份有限公司、湖北省力学学会协办。
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...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Hidden structures behinds the compressible Navier-Stokes equations and its applications to the corresponding models
可压缩 纳维-斯托克斯方程 隐藏结构 相应模型应用
2023/5/6
In this talk, we will review the past developments on the solutions of the compressible Navier-Stokes equations and reveal the three hidden structures which linked the weak solution to the strong one....
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：可压缩Navier-Stokes方程Riemann解的稳定性
可压缩 Navier-Stokes方程 Riemann解 稳定性
2023/5/6
可压缩Navier-Stokes方程描述可压缩粘性流体运动的力学规律，是流体力学中的基本方程。如果忽略粘性效应，可压缩Navier-Stokes方程即为无粘的可压缩Euler方程。可压缩Euler方程描述理想流体的运动，是典型的双曲守恒律方程组，其主要特点是：无论初值多么光滑和多么小，解都可能会爆破，形成间断（激波）。如果考虑可压缩Euler方程的Riemann问题，其解具有三种基本波：激波、稀疏...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Existence of phase transition for percolation using the Gaussian Free Field
高斯自由 伯努利渗透 相变存在
2023/5/8
In this talk, we prove that Bernoulli percolation on graph undergoes a non-trivial phase transition if the graph has bounded degrees and random walk on the graph has a heat kernel with rapid decay. Th...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：From Marc Yor to Brownian loop-soups
马克约尔 布朗循环汤 loop-soups
2023/5/8
We will survey aspects of Brownian loop-soups, which provide a higher-dimensional incarnation of some ideas present Marc Yor's works.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The Application of Continuous Adjoint Method for Shape Optimization in Navier-Stokes Flow
连续伴随法 纳维-斯托克斯流 形状优化
2023/5/8
In this work, the shape optimization problem of a solid immersed in the incompressible fluid governed by Navier-Stokes equations is considered. Based on the continuous adjoint method, the shape gradie...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Nonlinear structural stability and linear dynamic instability of transonic steady-states to a hydrodynamic model for semiconductors
跨音速稳态 非线性结构稳定性 线性动态不稳定性 半导体 流体动力学模型
2023/5/8
For unipolar hydrodynamic model of semiconductor device represented by Euler-Poisson equations, when the doping profile is supersonic, the existence of steady transonic shock solutions and C^\infty-sm...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The long wave approximation of the Green-Naghdi equations with the Coriolis effect
格林-纳格迪方程 长波近似 科里奥利效应
2023/5/8
This talk study the long wave asymptotic behavior of Green-Naghdi equations, which could be used to describe the propagation of long-crested shallow-water waves in the equatorial ocean regions with th...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Diffusion limit of the compressible Euler-P1 approximation model arising from radiation hydrodynamics
辐射流体动力学 可压缩欧拉 近似模型 扩散极限
2023/5/8
We first show the nonequilibrium-diffusion limit of the compressible Euler-P1 approximation model arising in radiation hydrodynamics as the Mach number tends to zero when the initial data is well-prep...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Stability and instability of a generic non--conservative compressible two--fluid model
通用非保守 可压缩 双流体模型 稳定性 不稳定性
2023/5/8
We are concerned with stability and instability of the steady state (1,0, 1, 0) for a generic non–conservative compressible two–fluid model in R^3. Under the assumption that the initial fraction densi...
第十二届全国流体力学学术会议在西北工业大学隆重召开（图）
流体力学 西北工业大学 中国力学学会
2023/11/9
2022年11月19日，第十二届全国流体力学学术会议采用线上/线下混合模式召开，线下会场设在西北工业大学翱翔国际会议中心。会议由中国力学学会流体力学专业委员会主办，西北工业大学极端力学研究院、航空学院、翼型叶栅空气动力学国家重点实验室、飞行器复杂流动与控制“111”引智基地、中国力学学会青年工作委员会承办，会议得到国家自然科学基金委的资助。本次会议邀请到李家春、郑晓静、陈十一、邓小刚、何国威、陆夕...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Stochastic Navier-Stokes equations via convex integration
凸积分 随机 纳维-斯托克斯方程
2023/5/8
In this talk I will talk about our recent work on the three dimensional stochastic Navier-Stokes equations via convex integration method. First we establish non-uniqueness in law, existence and non-un...