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22
2025/09
Neural combinatorial optimization for practical vehicle routing problems: Advances and challenges
Neural combinatorial optimization (NCO) has emerged as a promising paradigm for solving combinatorial optimization problems by leveraging the power of deep learning, which offers a data-driven, and adaptive approach that learns from problem instances and demonstrates strong generalization capabilities for effectively handling a wide range of problem instances. This talk focuses on the applications of NCO in solving practical vehicle routing problems (VRPs), which are fundamental in logistics and transportation. Several representative NCO models for VRPs will be reviewed firstly. I will then highlight how we developed NCO models to address VRPs with complex real-world constraints, such as time-dependent travel speeds and uncertain parking availability, which are challenging for traditional techniques. The results of performance comparisons between our NCO models and several benchmark models will be presented. Finally, significant challenges in applying NCO to practical VRPs will be discussed.
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22
2025/09
中国北方风沙活动的近期变化
中国北方风沙活动的近期变化
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22
2025/09
补偿机制延缓了全球粉尘释放的变化趋势
补偿机制延缓了全球粉尘释放的变化趋势
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22
2025/09
自然与人为变暖背景下中国北方沙漠风沙活动的时空分异特征
自然与人为变暖背景下中国北方沙漠风沙活动的时空分异特征
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19
2025/09
高层次社科基金的申报与写作（周末专家足球即时比分_365体育直播￥球探网行）
高层次社科基金项目的申报是一个系统性工程，也是对研究者学术积累、思维深度和综合能力的全面检验。本讲座将结合近几年新闻传播学立项项目，分析探讨高层次社科基金的申报与写作技巧。
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21
2025/09
Covering systems and periodic arithmetical maps
If the ring Z of integers is the union of finitely many residue classes a1(mod n1), . . . , ak(mod nk), then the system A = {as(mod ns)}k s=1 is called a cover of Z or a covering system. There are many problems and results on this topic initiated by Paul Erd ?os. In this talk we give a survey of covering systems and covers of groups by left cosets, and also introduce the algebraic theory of periodic arithmetical maps motivated by the speaker’s research on covering systems. The talk is related to number theory, combinatorics, algebraic structures and special functions.
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18
2025/09
Geometric properties of solutions to elliptic PDE’s in Gauss space and Related Brunn-Minkowski type inequalities
It is well known that several variational functionals verify Brunn- Minkowski type inequalities, such as: Torsional rigidity; First Dirichlet eigenvalue of the Laplace; p-Capacity... And their solutions of the corresponding boundary value problem (PDE's+boundary conditions), satisfy specific concavity properties. In this talk, I will present my recent work about the first Dirichlet eigenvalue problem to the weighted p-Laplace operator in Florence. (a joint work with Andrea Colesanti and Paolo Salani).
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17
2025/09
Chromatic profile of C_{2k+1}-free graphs
Erd?s and Simonovits asked the following question: For an integer r ≥ 2 and a family of non-bipartite graphs ?, what is the tight bound of α such that any ?-free n-vertex graph with minimum degree at least αn has chromatic number at most r? We answer this question for ? = {C_(2k+1)}, r ≥ 2 and k ≥ 3r + 4. This is a joint work with Yan Zilong and Yuan Xiaoli.
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19
2025/09
简谈当代马克思主义与科学和民主的发展规律
在一定的历史背景下考察科学与民主的关系，我们不难得出科学是民主之母的结论。由于中外科学史发展的路径不同，科学与民主的历史发展形态及特点也不同。
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17
2025/09
学习贯彻习近平法治思想，推动新时代法学教育高质量发展
一、我国法学教育的成就与问题二、新时代法学教育的使命和任务三、法学教育高质量发展的路径分析
