学术报告
数学科学学院
报告题目：
A fourth order parabolic curvature flow for the isoperimetric problem
报告人：
James McCoy (University of Newcastle)
报告时间：
2024年11月18日 15:00-16:00
报告地点：
Management Building, Room 1308
报告摘要：
We consider closed, embedded, planar curves evolving by a fourth order curvature flow under which the enclosed area is nondecreasing while the length is nonincreasing. We show that initial curves of sufficiently small oscillation of curvature converge exponentially in the $C^\infty$-topology to circles. Consequently this flow may be used to prove the isoperimetric inequality for such curves that, in particular, need not be convex nor starshaped. This is joint work with Yong Wei and Glen Wheeler.
报告题目：
Local well-posedness for the periodic Boltzmann equation with constant collision kernel
报告人：
Basakoglu Engin (上海科技大学)
报告时间：
11月20日16:00-17:00
报告地点：
五教5407
报告摘要：
The Boltzmann equation is of fundamental importance in the kinetic theory of gases and plas- mas. It describes the behavior of a dilute gas of identical particles in a specific scaling limit. From the well-posedness point of view, the equation has recently taken much attraction from Chen- Denlinger-Pavlovic, Chen-Holmer, and Chen-Shen-Zhang. In their recent series of papers, with or without the Wigner transform, they established the well-posedness for the Boltzmann equation in the Euclidean spaces using the methods from nonlinear dispersive PDEs. In this talk, we consider the 2D periodic Boltzmann equation with constant collision kernel. We essentially discuss a new Strichartz estimate to go through the proof of LWP for the Boltzmann equation and this is a first LWP result in the periodic case below d/2, which is the energy method threshold.
报告题目：
Berkovich spaces
报告人：
Charles FAVRE，CNRS & École Polytechnique（法国国家科学研究中心、巴黎综合理工大学）
报告时间：
11月20日 16:00-17:00
报告地点：
第五教学楼5107教室
报告摘要：
I will introduce the notion of Berkovich spaces and explain how they arise naturally in dynamics.
生命科学与医学部
管理学院
人文与社会科学学院
合肥微尺度物质科学国家研究中心
报告题目：
Precision measurements on molecular hydrogen in search for new physics
报告人：
Prof. Wim Ubachs（Vrije Universiteit Amsterdam, The Netherlands）
报告时间：
2024-11-18 15:30:00
报告地点：
物质科研B楼B1502
报告摘要：
Modern laser spectroscopic and metrology methods, involving atomic clocks and frequency comb lasers, allow for ever more refined and accurate determination of the quantum level structure of the smallest molecules, the hydrogen molecule, the hydrogen molecular ion, and its isotopologues. At the same time advanced quantum calculations, including non-adiabatic, relativistic and QED-effects on these small systems have become possible at a high level of accuracy. A comparison between experiment and theory for the benchmark dissociation energy reveals that both are in agreement at the sub-MHz level. This result can be interpreted as a test of QED in molecules, but also constraints on possible 5th forces or higher dimensions can be deduced. The abundancy and observation of H2 in quasar radiation can be used for deducing possible variations of the proton-electron mass ratio, a phenomenon that surpasses known physics. Currently the focus of research is shifting to the measurement of vibrational transitions in hydrogen; in view of the long lifetimes of those quantum states, that opens up a new avenue for precision metrology on molecules and the search for new physics.
报告人简介：
Wim Ubachs got his PhD degree in 1986 in Nijmegen University on “High resolution spectroscopy on diatomic hydrides”. Since 1988 he affiliated with Vrije Universiteit Amsterdam, as Lecturer, Senior Lecturer and Full professor. From 2000-2010 he became the director of the Laser Centre at VUA, and 2010-2014 the head of the Physics Department. At VUA he was involved in different aspect of laser spectroscopy, building narrowband lasers for XUV spectroscopy, harmonic generation and frequency comb lasers, studying perturbations in molecular spectra, spectroscopy for atmospheric and astrophysics, but mostly working on the hydrogen molecule.
精彩活动
“心梗救治日”心血管健康科普及义诊活动
活动简介：
为全面贯彻落实党的二十大精神、学校第十三次党代会精神，推动服务学校“潜心立德树人、执着攻关创新”根本任务落到实处，中国科学技术大学医院联合中国科大附一院专家于2024年11月20日“心梗救治日”当天，开展主题为“心梗拨打120，胸痛中心快救命”的蜗壳健康课“心血管健康科普进校园”及义诊活动。
此次活动旨在提高我校师生员工对心梗的认知、心脏健康的关注度，促进心血管病特别是心梗的预防和治疗。
活动地点：
东校区理化大楼西三报告厅
活动时间：
2024年11月20日 14:30—16:00
活动内容：
一、科普讲座：（一）提倡健康的生活方式，构筑防治急性心肌梗死的"三道防线"；（二）早识别、早就医，减少急性心梗的救治延误；（三）构建"三方协同"的救治体系，提高急性心梗的救治疗效
二、心肺复苏等急救技能培训
三、大型专家义诊等活动
学术活动月| 神奇实验室在哪里
活动介绍：
微尺度？同步辐射？这些高端的名字是什么意思？火灾科学具体又包括哪些？校园里林立的科研大楼里每天又在发生着什么？又有多少神奇的事物在其中诞生呢？你是否抱有好奇、想要一探究竟？
快来加入我们！学术活动月第一期实验室走访，这次，我们将去到：
国家同步辐射实验室
火灾科学国家重点实验室
微尺度物质科学国家研究中心
与我们一起走进科学的宫殿，感受科研发现的魅力吧!
报名时间：
截止至11月21日17:00
活动时间：
11月24日 9:30—14:40
活动地点：
中国科大东、西校区
面向对象：
全体科大本科生、硕博研究生
常年招生，欢迎联系：
中国科学技术大学EMBA中心
中国科大国金院专业学位招生与品牌中心（4号楼203、201室）
0551-63492103/63492306/63492305
或点击文末“阅读原文”进入预报名链接
