Speaker: Prof. Ohyun Kwon (UCLA)Inviter: Dr. LI WeiVenue: C100, Building 5, Haina Court, Zijingang Campus

Speaker: Prof. ZHANG ZhifeiVenue: Room 210, Building 2, Haina Court, Zijingang Campus

Venue: Room 118, East Building 6, Zijingang Campus

Speaker: Prof. ZHANG Zhou (The University of Sydney)Venue: Room 102, Building 2, Haina Court, Zijingang CampusAbstract: In this talk, we start by describing the history of the study on this Kahler-Ricci flow, usually considered as the easy-sign version. The degenerate setting has been the main interest for the past 2 decades, following Tian’s Program which was later elaborated as Analytic Minimal Model Program in Song-Tian’s works. A board spectrum of techniques have been involved in the progress. We focus on the recent result by Wondo-Z regarding the types of infinite time singularities which is for the case of minimal manifolds), extending earlier works by Yashan Zhang and confirming a conjecture by Tosatti.

Speaker: Dr. ZHAO FangzhuHost: Prof. WANG QingqingVenue: Room 205, Composite Building, School of Medicine, Zijingang Campus

Speaker: Prof. LUO Liqun (Member of the National Academy of Sciences)Venue: atrium on the first floor of Research Building, Liangzhu Laboratory Host:Prof. HU Hailan

Speaker: Prof. Atilla Incecik (University of Strathclyde）Venue: Offline: 126, Administration Building, Zhoushan CampusOnline: Tencent Meeting 753-637-338Abstract: Growth in waterborne transportation and trade will be driven as the world population increases due to demand for food, water, energy and technological products. With massive growth in computational capacity and data storage capabilities, globally accessible networks and cloud infrastructure, availability of smart devises and smart and cheap sensors, a significant increase of digitalization and automation in all waterborne sectors is taking place. This talk will aim at presenting the expected impacts on waterborne transport of increasing population, economic growth, energy demand and supply, climate change, decarbonisation, digitalization and automation and the research in the Department of Naval Architecture, Ocean and Marine Engineering at the University of Strathclyde to address these impacts. The presentation will be concluded by emphasizing the importance of training and upskilling of naval architects, ocean and marine engineers as well as seafarers to meet the challenges summarized above.Profile of speaker: Atilla Incecik is Professor of Offshore Engineering at the University of Strathclyde, Glasgow. During the last sixteen years he served as the Head of Department of Naval Architecture, Ocean and Marine Engineering, and Associate Principal and the Executive Dean of the Faculty of Engineering. Professor Incecik’s research activities include the development of hydrodynamic design and analysis tools and model testing of marine and offshore engineering systems, including marine renewable energy devices. Professor Incecik was the Research Manager of Industrial Doctoral Centre for Offshore Renewable Energy (IDCORE) and is a Chair Professor at Zhejiang University. Professor Incecik is Editor-in-Chief of Ocean Engineering Journal. In 2019 Professor Incecik was awarded an Honorary Doctorate by Chalmers University of Technology in recognition of his research on green shipping and environmental sustainability.

Speaker: Professor Hu Xiaozhe (Tufts University, U.S.A.)Venue: Room 205, Building 2, Haina Court, Zijingang CampusAbstract: Numerical simulation of partial differential equation (PDE) models is essential to understand complex applications in science and engineering. When developing discretization methods for solving these PDEs, it is essential to preserve the physical integrity of the problem to obtain high-fidelity approximations to the solutions. In this talk, we focus on the mimetic finite-difference (MFD) method, where discrete operators “mimic” their continuous counterparts, and physical properties and conservation laws are satisfied exactly on the discrete level. Using Maxwell’s equations as an example, we draw connections between the MFD method and finite-element exterior calculus, which provides a straightforward path to proving well-posedness, deriving error estimates, and developing robust linear solvers for MFD discretizations. We will also discuss MFD discretization for convection-dominated diffusion equations, which have a variety of applications in particle transport, electromagnetics, and magnetohydrodynamics. If time permits, we will briefly mention the generalizations of MFD to fractional PDEs and data-driven scientific machine learning. Contact persons: Prof. LIANG Kewei, Prof. CHENG Xiaoliang

Speaker:  Prof. MENG Hangyang (Shanghai University)Venue: 203, Building 2, Haina Court, Zijingang CampusAbstract: In this talk, we will introduce some algebraic topology methods on studying the poset(=partial ordered set) of some cosets of a finite group. Let G be a finite group and X be a subgroup of G. We investigate the topological properties of poset C_X(G) of cosets Hx in G with X ≤ H < G. We show that C_X(G) is non-contracitble if G is solvable or N_G(X) contains a Sylow 2-subgroup and a Sylow 3-subgroup of G. This result follows J. Shareshian and R. Woodroofe’s work in Adv. Math(2016). We also gives some divisi[1]bility properties of the Euler characteristic of C_X(G) when X is a p-group, which follows K. S. Brown’s classical result in J.Algebra(2000).