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15
2026/04
冰与火之歌: 银河系中电离氢区与恒星形成的相互作用
大质量恒星形成于温度仅为数十开尔文的极冷分子云中，而其诞生后会释放强烈的紫外辐射，电离周围母体分子气体，从而形成温度约为一万开尔文的电离氢（H II）区。这一反馈过程对周围环境的结构演化及后续恒星形成具有深远影响。本报告将重点介绍我们基于ALMA等大型射电望远镜观测所取得的研究进展，聚焦电离氢区与其周围致密分子气体之间的相互作用，以及该过程在不同演化阶段大质量恒星形成中的作用。我们的研究表明，电离氢区反馈具有显著的复杂性，其影响强烈依赖于局部物理条件，难以简单地以“促进”或“抑制”来概括其在大质量恒星形成中的角色。
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16
2026/04
和声的风格与实践
本次讲座介绍了和声分为调性和声、调式和声与后调性音高组织三类，通过实例分析梳理从中世纪直至20世纪和声发展思维与技法变迁的历史脉络。并通过中西对比提出"动态和谐论"，指出和声的"良好"标准并非永恒真理，而是随历史与文化变迁的审美建构。
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16
2026/04
AI赋能音乐教育：从创作、练评到课堂——未来教师的核心能力
在人工智能技术迅猛发展的当下，音乐教育领域正经历深刻变革。本次讲座旨在探讨AI如何深度融入音乐教育的创作、练习评价及课堂教学环节，剖析未来音乐教师所需掌握的核心能力，助力教师适应技术变革，提升教学质量，推动音乐教育创新发展。
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16
2026/04
城市绿地文娱与健康服务评估
在快速城市化与高密度人居环境背景下，城市绿地（UGS）提供的游憩（文娱）与健康服务对提升居民福祉至关重要。本报告围绕“绿地景观格局—文娱服务—健康效应”的主线，综合运用多尺度空间分析、问卷调查与数理统计模型，对城市绿地文娱服务及其健康效益进行了系统性评估。在游憩行为机制与供需空间评估方面，研究首先揭示了影响绿地游憩的多维因素，在此基础上，构建了多尺度的游憩服务供需匹配评估模型，并在广州、巴黎及京津冀城市群等不同尺度开展实证。在绿地暴露的健康效应与作用路径方面，研究深入探讨了绿地缓解压力、促进心理健康的机制与系列调节因子，揭示了“What UGS feature is beneficial”, “Who gains benefits” 和“Where is more beneficial”，为城市绿地规划与健康城市建设提供科学支撑。
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14
2026/04
The Weisfeiler-Leman dimension of graphs, old and new results
Abstract: In the present talk, we first give several equivalent definitions of the Weisfeiler-Leman dimension of a graph. Then, we briefly survey some known results on this invariant and its connection to the Graph Isomorphism Problem. In the main part of the talk, we discuss recently obtained results and mention some open problems.
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14
2026/04
Divisible design graphs derived from collections of affine designs
A divisible design graph is a finite regular graph whose vertex set can be partitioned into classes of equal size, in such a way that the number of common neighbors of two distinct vertices depends only on whether they belong to the same or different classes.In this talk, we present techniques for generating new infinite families of divisible design graphs derived from collections of affine designs. These collections are arranged according to either the Cayley table of a left quasigroup or based on the incidence matrix of a symmetric $2$-design. Several of the resulting graphs exhibit parameter sets that were previously unknown.
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13
2026/04
Eigenvalues of graphs embedded on surfaces
Minors play an important role in graph theory. The famous Archdeacon-Huneke-Robertson-Seymour theorem states that for every closed compact surface, there exists a finite list of graphs such that a graph G is embeddable on this surface if and only if it does not contain any of these graphs as a minor.In this talk, we give a survey on extremal eigenvalues of graphs embedded on surfaces.
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13
2026/04
On the maximal index of unbalanced signed graphs with a prescribed number of edges
In 1985, Brualdi and Hoffman posed the problem of finding the maximal index of graphs with a prescribed number of edges and Rowlinson solved the above problem in 1988. In this talk, we consider the version of signed graphs for Brualdi and Hoffman’s problem and determine the maximal index among unbalanced signed graphs with a prescribed number of edges.
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17
2026/04
“大外真知讲坛”第33讲 外语学科介入区域国别研究的路径———以时空体为例
本讲座将结合近两年的国家社科基金项目的最新动态，并以巴赫金的时空体概念为例，解读区域国别学的研究定位、特点和方向，并从外语学科的研究领域阐述介入区域国别研究的路径，以互鉴性的思路构建外语学科的跨学科研究范式。
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15
2026/04
文苑大讲堂2026年第7讲： 语言艺术的魅力
围绕“语言艺术的魅力”这一主题，深入阐释语言之于思想表达、精神塑造和文化传承的重要意义。
