In this talk we will talk about more mathematical and fundational aspects of quantization in general, focusing on its difficulties instead of great achievements. Especially, we will talk about the second kind of divergence in quantum field theory, as a motivation to organically integrate the soitonic contribution into QFT as a whole, and the quantization at the presence of a kink. Recall that renormalization is crucial in obtaining finite order-by-order contributions in formal perturbation theory. However, the matching of renormalization schemes between different topological sectors was for a long time not well defined hence lead to ambiguity. In this talk we will also try to answer the question: If a vacuum sector Hamiltonian is regularized by an energy cutoff, how is the one-kink sector Hamiltonian regularized?

Using the Kreuzer-Skarke database of 4-dimensional reflexive polytopes, we systematically constructed a new database of orientifold Calabi-Yau threefolds up to h^{1,1}(X) =12. Our approach involved a non-trivial Z_2 involution, with both divisor exchanging and multi-reflections, acting on the Calabi-Yau manifolds. Each of such proper involutions will result in an orientifold Calabi-Yau manifolds and 320,386,067 of them was constructed. We developed a novel algorithm that significantly reduces the complexity of determining the fixed locus under the involutions, followed by the locations of different types of O-planes. It shows that under the proper involutions one end up with majority the O3/O7-planes system and most of them will further admit a naive Type IIB string vacua. Additionally, a new type of free action was determined. We also computed the smoothness and the splitting of Hodge numbers for these orientifold Calabi-Yau threefolds. Finally, We use the machine learning technique to search the polytope which can result in an orientifold Calabi-Yau hypersurface and the“naive type IIB string vacua”.

孟祥柱博士将从“搏战旷世巨灾，铸就伟大精神”“意识形态安全，文化自信自强”、“弘扬中国精神，砥砺奋进前行”三部分出发，带领各位师生进行一场别开生面的思考，以不同时代的视角更加深刻地理解灾难中的民族精神，体会文化自信对推动社会发展的重要作用。

本讲座从国际二语习得研究发展的对比分析、错误分析、中介语发展及近期英语国际通用语研究四个发展阶段入手，系统分析二语习得研究发展历程及其对世界外语教学和二语习得实践活动的深刻影响，并重点讨论以下问题：1. 二语习得研究的学科性；2. 二语习得研究发展阶段；3. 二语习得研究代表性团体；4. 二语习得研究方法；5. 二语习得研究若干趋势；6. 二语习得认识方法论与理论创新。

课程思政作为新兴的教学理念已成为当今大学英语教学改革与创新的核心议题。基于文献梳理，本研究结合大学英语课程思政内涵和社会文化理论中的情感体验(perezhivanie)概念，尝试设计大学英语课程思政教学有效性调研问卷。随后，依据活动理论框架，提出开展大学英语课程思政教学有效性及其影响因素的理论框架，并进一步结合定性和定量研究方法勾勒出实证研究的路径框架。本研究可以为探索调研课程思政有效性的实证研究提供新思路和新方法。

如何消除心理紧张，如何用肢体语言控场，如何发挥语言的魅力，如何进行精彩的表达，如何增强沟通交流的能力，如何进行表达与沟通的自我训练。

泛化性视角下的学习与反学习

感受百年学府的历史脉动是成为西南交大教师、确立“交大认同”的首要一步。上好一门课应当是青年教师站稳讲台的关键一步。领会教育强国内涵要义、践行教育家精神则是成为“大先生”的成功一步。