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06
2025/07
新世纪以来中国城市职能特征及演变
新世纪以来中国城市职能特征及演变
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11
2025/07
肠道菌源酶:代谢性疾病干预的新路径
肠道菌源酶:代谢性疾病干预的新路径
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04
2025/07
Bourgain techniques for low regularity error estimates
Standard time-stepping techniques require a regularity constraint on the initial data $u_0$ for dispersive equations. We introduce a class of low regularity integrators for problems where certain constraints are not satisfied. Moreover, when the regularity is critically low ($u_0\in H^s$ with $s\leq d/2$), the classical stability argument based on Sobolev spaces does not hold. We have developed a discrete Bourgain framework that overcomes this problem. In this talk, I will use several different dispersive models to summarize how these techniques are applied.
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04
2025/07
Explicit K-symplectic methods for nonseparable non-canonical Hamiltonian systems
We propose efficient numerical methods for nonseparable non-canonical Hamiltonian systems which are explicit, K-symplectic in the extended phase space with long time energy conservation properties. They are based on extending the original phase space to several copies of the phase space and imposing a mechanical restraint on the copies of the phase space. Explicit K-symplectic methods are constructed for two non-canonical Hamiltonian systems. Numerical tests show that the proposed methods exhibit good numerical performance in preserving the phase orbit and the energy of the system over long time, whereas higher order Runge–Kutta methods do not preserve these properties. Numerical tests also show that the K-symplectic methods exhibit better efficiency than that of the same order implicit symplectic, explicit and implicit symplectic methods for the original nonseparable non-canonical systems.
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03
2025/07
河北师范大学地理大数据计算与资源规划研究实验室2025年青年博士学术交流会
8:30 基于深度学习的多源遥感数据融合应用关键技术研究楚博策 中国电子科技集团公司第五十四研究所9:00 生态环境脆弱区植被覆盖时空演变及生态响应研究张敏 中国地震灾害防御中心9:30 北京市平原乡镇“三生”功能耦合协调与国土空间优化研究王文卉 北京工业大学10:00 戈壁粉尘释放模型的构建、验证与应用梁林昊 中国科学院大学
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28
2025/06
数学科学学院人才招聘暨青年学者论坛
19:00 谢贻林（南方科技大学）申请岗位：博士后19:20 S. Sankar（佩里亚大学） 申请岗位：博士后19:40 Mubarak Muhammad（波尔图大学） 申请岗位：博士后20:00 Reila Zheng（多伦多大学） 申请岗位：博士后
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27
2025/06
谈谈雷锋精神的时代价值和意义
结合习近平总书记“我将无我、不负人民”之精髓谈谈雷锋精神的时代价值和意义。
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27
2025/06
Some results on half-arc-transitive bi-Cayley graphs
A graph is half-arc-transitive if its full automorphism group acts transitively on its vertex set and edge set, but not arc set. A graph is said to be a bi-Cayley graph over a group H if it admits H as a semiregular automorphism group with two vertex-orbits. In this talk, I will introduce some results about half-arc-transitive bi-Cayley graphs.
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29
2025/06
“大思政”育人体系的构建
“大思政”育人体系的构建。
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25
2025/06
索洛维约夫的聚合性观念
“索洛维约夫的聚合性概念”是理解19世纪末俄罗斯哲学与社会思想的重要切入点之一。弗拉基米尔·索洛维约夫在其哲学体系中，将“聚合性”视为克服人类分裂状态、实现整体和谐的核心原则。该概念不仅体现为人与上帝的合一，更扩展到社会层面的各个领域，强调人、社会与宇宙秩序的有机统一。
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