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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：A decomposition of pollution intensity in China's value-added trade
中国 增值贸易 污染强度 分解
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2023/4/24
Based on a multi-regional input-output model, this study explores the temporal changes and driving forces of China's environmental losses relative to its economic gains from international trade with e...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Worse than imagined: Unidentified virtual water flows in China
中国 不明身份 虚拟水流
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2023/4/24
The impact of virtual water flows on regional water scarcity in China had been deeply discussed in previous research. However, these studies only focused on water quantity, the impact of virtual water...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：国民营养与粮食安全研究
国民营养 粮食安全 双重约束
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2023/4/24
国民营养和粮食安全是关系国家经济发展和社会安全稳定的重大基础性和战略性问题。报告聚焦"国民膳食、营养、健康变迁与可持续发展"和"粮食可持续供需格局与保障"两大议题进行研讨,包括国民膳食营养特征和精准化评价与需求、基于营养健康和粮食安全的粮食中长期需求预测、营养健康导向的动物性食物与饲料粮需求、营养目标与资源环境双重约束的粮食供给优化、新技术支撑下粮食绿色控制与系统治理、新时代面向国民营养与粮食安全...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：On Kahler Ricci shrinker surfaces
Kahler Ricci 收缩机 表面
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2023/4/23
We prove that any K?hler Ricci shrinker surface has bounded sectional curvature. Combining this estimate with earlier work by many authors, we provide a complete classification of all K?hler Ricci shr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Probabilistic HIV Recency Classification -- A Logistic Regression without Labeled Individual Level Training Data
概率 HIV新近度分类 个人水平训练数据 逻辑回归
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2023/4/24
Accurate HIV incidence estimation based on individual recent infection status (recent vs long-term infection) is important for monitoring the epidemic, targeting interventions to those at greatest ris...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：基于微分对策理论的航天器"追-逃-防"博弈控制策略研究
微分对策理论 航天器"追-逃-防" 博弈控制
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2023/4/24
微分博弈是研究航天器轨道追逃问题的理论基础，最早应用于具有自主决策能力的双方完全信息追逃博弈的交战场景中。本报告将上述场景拓展为包括追击者、逃避者和防御者（追-逃-防）的三方完全信息博弈制导情形，首先介绍了一种基于微分对策理论的航天器三方博弈相对轨道动力学模型，继而阐述了一种利用极值原理的模型求解方法，并通过数值模拟进一步探讨了航天器"追-逃-防"完全信息博弈问题的最优解决方案。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Bootstrap-based Statistical Analysis for Multi-period Data-driven Inventory Models with Seasonal Demand
自举 统计分析 季节性需求 多周期数据 驱动库存模型
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2023/4/24
We study multi-period inventory control systems in which managers face seasonal demands with unknown distributions and make inventory decisions based on past demand data. It can be shown that a data-d...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Energy stability of exponential time differencing schemes for the nonlocal Cahn-Hilliard equation
非局部 Cahn-Hilliard方程 指数时间 差分方案 能量稳定性
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2023/4/24
In this talk, we consider a class of exponential time differencing (ETD) schemes for solving the nonlocal Cahn-Hilliard equation. We first use the Fourier collocation method to discretize the space do...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Global quasineutral Euler limit for the Vlasov-Poisson-Landau system with rarefaction waves
稀薄波 弗拉索夫-泊松-朗道系统 准中性 欧拉极限
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2023/4/24
The formal limit of the one-dimensional Vlasov-Poisson-Landau (VPL) system in the combined small Knudsen and quasineutral regimes gives the compressible Euler system. In the talk I will present a rece...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Optimal planning of degradation-based maintenance strategy
降级 维护策略 优化规划
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2023/4/24
The optimal planning of condition-based maintenance strategy based on the degradation process is of great concerned in the past few years. A lifetime delayed degradation process with heterogenous degr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Large deviations principle for weighted means of a recursive numerical method for ergodic SDEs
遍历 SDE递归 数值方法 加权均值 大偏差原理
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2023/4/24
For ergodic SDEs, their ergodic limits are usually approximated by the suitable means of numerical methods. To reveal the numerical asymptotic behavior, we study the large deviations principle (LDP) f...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：A Landscape View of Eigenvalues Approximation
特征值近似 景观视图 无序系统
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2023/4/24
Waves of all sorts, including electromagnetic waves, acoustic waves, and mechanical vibrations, play a role in shaping our world. In disordered systems, the transport of waves is hindered, resulting i...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：An Unfitted Interface Penalty Partly DG Finite Element Method for Interface Problems
接口问题 未拟合 有限元法 部分DG惩罚 Nitsche方法
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2023/4/24
An unfitted interface penalty finite element method is proposed for the interface problems, in which Nitsche's method together with the ideas of merging elements and harmonic weighing fluxes are used,...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：对抗性博弈的技术实现
对抗性 博弈 中国科学院数学与系统科学研究院
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2023/4/24
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：对抗性博弈的技术实现。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Non-local operators with low-order singular kernels
低阶 奇异内核 非局部 运算符 正则性估计 二阶椭圆方程
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2023/4/24
The regularity estimates have well-established for second-order elliptic and parabolic equations, as well as for equations with stable-like non-local operators. Whether similar results hold for non-lo...