Speaker: Prof. Jonathan L. Sessler (The University of Texas at Austin)Inviter: Prof. LI Hao (Zhejiang University)Venue: C100, Building 5, Haina Court, Zijingang Campus

Speaker: Prof. HAN Xiaolong (California State University, Northridge)Venue: 102, Building 2, Haina Court, Zijingang CampusAbstract: The harmonics on a compact Riemannian manifold are the mathematical functions which describe the natural modes of oscillation. They are described by the eigenfunctions of the Laplacian, whose behaviors are heavily influenced by the global geometry of the manifold. In this talk, we discuss this relation in the study of global harmonic analysis, through two symmetric spaces: compact hyperbolic surfaces (constant negative curvature) and spheres (constant positive curvature). We explain how Laplacian eigenfunctions behave, both similarly and differently, on these two geometries.Contact person: Prof. XI Yakun (yakunxi@zju.edu.cn)

Venue: 210, Building 2, Haina Court, Zijingang CampusSpeaker: Professor Faouzi Triki (University Grenoble Alpes)Abstract: The talk is related to the inverse problem of reconstructing the diffusion and absorption coefficients of the diffusion equation from internal data in photo-acoustic imaging. I will show that the problem is Hölder stable in subregions close to the boundary where the internal information is available. The Hölder exponent converges to a positive constant independent of the subregion as the subregion contracts towards the boundary. I will also present several numerical tests that illustrate the theoretical results. 

Lecturer: Prof. Christopher W. JonesInviter: Prof. Bingfeng ShiVenue: C100, Building 5, Haina Court, Zijingang Campus

Lecturer: Prof. Erick M. CarreiraInviter:Prof. Bingfeng ShiVenue: C100, Building 5, Haina Court, Zijingang Campus

Venue: Lecture Hall, Institute For Advanced Study in Mathematics, Zijingang CampusSpeaker: Prof. Zhang Lei, National University of SingaporeAbstract: In this talk, we introduce a notion of arithmetic wavefront sets for admissible representations of classical groups over local fields of characteristic 0. Conjecturally, via local Langlands correspondence, this arithmetic wavefronts coincide with the classical wavefront sets in sense of Harish-Chandra characters. Hence this conjecture proposes an algorithm to explicate the wavefront sets of representations in generic L- packets, by computing local symplectic root numbers. In particular, we verify the analogue conjectures over finite fields. This is a joint project with Dihua Jiang (The University of Minnesota), Dongwen Liu (Zhejiang University), Zhicheng Wang (Soochow University).

Speaker: Prof. Katharina Kohse-HöinghausHost: Prof. Huang Qunxing, the Vice Dean of College of Energy EngineeringVenue: Lecture Hall 117, Shaoke Hall, Yuquan CampusAbstract: Carbon neutral strategies pose new challenges to combustion technology and combustion chemistry. This lecture will focus on the latest international experimental research and modelling advances in renewable fuels and low-carbon combustion, and discuss the role that combustion can play in achieving carbon neutrality.

Speaker: Dr. Yang Shiyu, an Assistant Professor of Management at the Texas A&M International UniversityVenue: 723, Building A, School of ManagementAbstract: Watching movies is among the most popular entertainment and cultural activities. As Hollywood calls for increasing representation of racial minority actors, how do viewers react when a movie sequel adds racial minority actors to the main cast? On the one hand, such sequels may receive better ratings if viewers appreciate racially inclusive casting for its moral appeal (the fairness perspective for diversity) and novel elements (the value-in-diversity perspective). On the other hand, consumer discrimination research suggests that if viewers harbor bias against racial minorities, sequels that increase racial minority actors may receive worse ratings. Analyzing a novel dataset of 435 movies nested in 173 series released from 1998 to 2021, we find that increasing racial minority actors in the main cast hurts movie ratings on Rotten Tomatoes and IMDb. We also rule out two alternative explanations: (a) viewers dislike cast change per se; (b) the added racial minority actors have lower credentials. Text analysis of 312,457 movie reviews shows that the negative effect of racial minority increase on movie ratings is mediated by toxic language in movie reviews. Importantly, the negative effect of racial minority increase is mitigated by the Black Lives Matter movement, and this bias mitigation effect exists for both Black and non-Black minority actors, indicating the power of social movements in fostering equity and inclusion.Speaker's profile: Dr. Yang is an Assistant Professor of Management at the Texas A&M International University. She received her Ph.D. in Business Administration from the University of Illinois Urbana-Champaign. She earned a master’s degree in Management, a bachelor’s degree in Economics, and a bachelor’s degree in Psychology from Peking University. Her current research investigates how social movements and social structures can eliminate social disparity and lead to meaningful changes in public responses to inclusion initiatives. Dr. Yang’s works have been published in major social science journals and under review in leading business and psychology journals.

Speaker: Prof. Luc Janss, Aarhus University, DenmarkHost:Prof. Pan Yuchun, Zhejiang UniversityVenue: E222, College of Animal SciencesContact person: Zhang Zhe (18818212609)