中国科大学位与研究生教育
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主讲教师:李落清 人气:24 更新时间: 2019年10月23日
Abstract:Inthistalkwewillintroducealearningtheoryapproachtothetopicofestimatingtransferfunctionsinsystemidentification.Afrequencydomainidentificationproblemisformulatedasanatomicnormregularizationschemeinarandomdesignframeworkoflearningtheory.Suchaformulationmakesitpossibletoobtainsparsityandprovidefinitesampleestimatesforlearningthetransferfunctioninalearningtheoryframework.Erroranalysisisdoneforthelearningalgorithmbyapplyingalocalpolynomialreproductionformula,concentrationinequalitiesanditerationtechniques.Theconvergencerateobtainedhereisthebestintheliterature.Itishopedthatthelearningtheoryapproachtothefrequencydomainidentificationproblemwouldbringnewideasandleadtomoreinteractionsamongtheareasofsystemidentification,learningtheoryandfrequencyanalysis.
主讲教师:Jaap van der Vegt 人气:26 更新时间: 2019年10月23日
摘要:Multigridmethodscanprovideveryefficientiterativemethodsforthesolutionoflargesystemsof(non)linearalgebraicequations,resultingforinstancefromthediscretizationofpartialdifferentialequations.Inamultigridmethodseveralcoarsenedapproximationsofthealgebraicsystemandwell-designedsmoothersareusedtoacceleratetheconvergenceoftheiterativemethod.Thiscanresultinveryefficientiterativemethods,butifonewantstodevelopnewmultigridalgorithmsorunderstandtheperformanceofexistingalgorithms,thenmultilevelanalysisisindispensible.Inthisclassanoutlineofbasicmultigridanditerativemethodswillbegivenandmathematicaltechniquestounderstandandpredicttheirperformancewillbediscussed.Nopriorknowledgeofmultigridoriterativemethodswillberequired.Afterthisclassyoushouldbeabletousebasiciterativeandmultigridmethods,analyzeand(approximately)predictmultigridperformanceusingmultilevelanalysisandapplythesetechniquestoimproveandtestmultigridalgorithms.Themainapplicationswillbefromnumericaldiscretizationsofpartialdifferentialequations.Reference:U.Trottenberg,C.W.Oosterlee,A.Schüller,Multigrid,AcademicPress,ISBN0-12-701070-X,2001
主讲教师:苏东 人气:29 更新时间: 2019年10月23日
【报告内容简介】:Advanced(scanning)transmissionelectronmicroscopy((S)TEM)techniqueshavebeenintensivelyappliedtostudythematerialsforenergystorage.With/CombiningdifferentTEMtechniques(includingin-situTEManddiffraction,HAADF-STEM,andSTEM-electronenergy-lossspectroscopy(EELS)),researchersareabletoprobelocalstructuralandchemicalinformationofelectrodematerials,ataresolutionofnanoscale.Thistalkwillfocusonmyrecentworkonusingin-situandanalyticalTEMtocharacterizetheconversion-reactionoxidematerial(Fe3O4)forelectrodeoflithiumionbatteries(Fe3O4)[1-2],andPtbasednanocatalystsforfuelcell[3,4].ThedynamicalprocessoftheredoxreactionofFe3O4revealedbyin-situTEMmayhelpustounderstandhowreactionpathwaysaffectthebatteries’kineticproperties.ForPtbasedelectrocatalystforfuelcell,thestraincouplingatinterfacesishighlightedforitscrucialroleindeterminingboththerateofelectrochemicalreactionandthecatalyticactivity.Reference:[1]VisualizingNon-EquilibriumLithiationofSpinelOxideviaInSituTransmissionElectronMicroscopy,He,etal.,NatureCommunications,7,11441(2016)[2]StrainCouplingofConversion-typeFe3O4ThinFilmforLithiumIonBattery,Hwang,etal.AngewandteChemie,56,7813,(2017)[3]BiaxiallystrainedPtPb/Ptcore/shellnanoplateboostsoxygenreductioncatalysis,Buetal.,Science,354,1410(2016)[4]OrderedPt3CoIntermetallicNanoparticlesDerivedfromMetal-organicFrameworksforOxygenReduction,Wangetal.NanoLett,18,4163(2018)【报告人简介】:Dr.DongSuisaProfessoratInstituteofPhysics,CAS.HewasthegroupleaderofelectronmicroscopyinCenterforFunctionalNanomaterialsatBookhavenNationalLaboratoryuntilAugust2019.HeisalsoanadjunctprofessorintheDepartmentofMaterialsScienceandEngineeringatStonyBrookUniversity.HegothisB.S.in1998fromNanjinguniversity.HegothisPh.Dincondensedmatterphysicsin2003,fromNanjinguniversityandInstituteofPhysics,CAS(advisors:Prof.YeningWang,andProf.KehsinKuo).AfterdoingpostdocinEPFL,Switzerland,UniversityofIllinoisatUrbana-Champaign,andArizonaStateUniversity,hejoinedBrookhavenNationalLaboratoryin2008asanassistantscientist.Hehasbeenthroughtherankandwaspromotedtoscientistwithcontinuingappointmentin2015.Dr.DongSuhaspublishedmorethan300papersinpeer-reviewedjournalswithcitation>18,000(Google,Hfactor~62).HisworkhavebeenhighlightedmultipletimesinDepartmentofEnergy(DOE)website,includingoneofthe40researchmilestonesinDOE40thanniversary.HehasbeenareviewerforDOE,NSF,andACSgrantsandjournalsofNature,NatureMaterials,NatureCommunications,ScienceAdvances,PRL,JACS,etc,andanorganizerofsymposiumsinnationalconferencesandworkshops.Hehasgivenmorethan30invitedtalksininternationalconferencesanduniversityseminars.
主讲教师:朱小华 人气:103 更新时间: 2019年10月19日
Abstract:Weshowthatany$Kappa$-soluitionofRicciflowoncompactK"ahlermanifoldsmustbequotientsofproductsofirreduciablecompactHermitiansymmetricmanifolds.Wewillalsodiscussthenoncompactcase.
主讲教师:管鹏飞 人气:102 更新时间: 2019年10月19日
Abstract:TheMinkowskiinequalitystatesthat,foraconvexbody$OmegasubsetmathbbR^{n+1}$,$int_{partialOmega}HdsigmageC_n(int_{partialOmega}dsigma)^{frac{n-1}{n}}$forsomedimensionalconstant$C_n>0$,theequalityholdsifandonlyif$Omega$isaroundball.Thisinequalityhasbeenextendedforstarshapeddomains(Guan-Li)andforareaouterminimizingdomains(Huisken).Inthistalk,thefocusisthistypeofinequalityinspaceform:hyperbolicspace$mathbbH^{n+1}$andellipticspace$mathbbS^{n+1}$.Wewilldiscusssomerecentresultsandchallengingopenproblems.
主讲教师:杨 军 人气:72 更新时间: 2019年10月19日
Abstract:WeusethereductionmethodtoconstructclusteredphasetransitionlayersneartheboundaryofdomainforaninhomogeneousAllen-Cahnequation.ThisisanextensionoftheresultbyA.MalchiodiandJ.WeiinJ.fixedpointtheoryappl.(2007).
主讲教师:Christian Blohmann 人气:169 更新时间: 2019年10月17日
摘要:Iwillgiveatourofthenotionofhamiltonianactionsfrombasicconceptstorecentdevelopments.InthefirsthourIwillgiveaselfcontainedreviewofthefollowingtopics:conservedquantitiesinclassicalmechanics;integrability;hamiltoniangroupactions;toricmanifolds,Guillemin-Sternbergconvexitytheorem,Delzantreconstrucion;symplecticreduction;Bochner-Weinsteinlinearizatonatcriticalpoints.InthelasthalfhourIwilldescribearecentgeneralizationofhamiltonianactionstoLiealgebroidsandLiegroupoids,whichismotivatedbyastudyofthesymmetriesofGeneralRelativity.ThisisjointworkwithAlanWeinstein.
主讲教师:彭银河 人气:108 更新时间: 2019年10月17日
摘要:Onemaintaskinsettheoryistoprovetheindependenceofstatements,e.g.,axiomofchoice(AC),continuumhypothesis(CH),Suslinhypothesis(SH).Iwillgiveabriefintroductionofseveralstatements:history,solution,ongoingopenproblems.
主讲教师:王贤文 人气:174 更新时间: 2019年10月11日
王贤文,2017年度教育部“青年长江学者”、大连理工大学教授、博士生导师、大连理工大学学术委员会委员、人文与社会科学学部副部长,担任JournalofInformetrics编委、FrontiersinResearchMetricsandAnalytics期刊副主编,以及十余本SSCI期刊的审稿人。主持国家及省部级课题10余项,发表学术论文100余篇,其中SSCI论文近30篇,多篇论文入选ESI高被引论文、ESI热点论文,被Nature等全球数十家媒体报道。
主讲教师:钮维生 人气:147 更新时间: 2019年10月11日
Abstract:Weconsiderquantitativeestimatesinthehomogenizationofsecond-orderellipticsystemswithperiodiccoefficientsthatoscillateonmultipleseparatedscales.Weestablishlarge-scaleinteriorandboundaryLipschitzestimatesdowntothefinestmicroscopicscaleviaiterationandrescalingarguments.WealsoobtainaconvergencerateintheL2spacebythereiteratedhomogenizationmethod.
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Aranda Pino
Profesor of Department of Algebra, Geometry and Topology Science Faculty, University of Málaga, Spain. Research Interests: Leavitt path
Nikos Hadjichristidis
Prof. Nikos Hadjichristidis, Department of Chemistry, University of Athens.
蔡荣根
中国科学院理论物理所研究员,博士生导师。中国引力和相对论天体物理学会副理事长(2008-) 中国科学技术大学交叉学科理论研究中心兼职教授
欧阳钟灿
欧阳钟灿,中国科学院院士。1968年清华大学自控系毕业,1981年清华大学物理系固体物理专业获硕士学位,1984年获光学专业理学博士学位。1985-1986年在理论物理所
Manuela M. Veloso
Manuela M. Veloso教授是国际人工智能和自主机器人领域的主要学界领导人和学术带头人之一,取得了一系列杰出成就,其中部分成果产生了深远的影响。
庄小威
庄小威,华裔美籍生物物理学家,美国国家科学院院士, 哈佛大学化学与化学生物、物理学教授,创办有庄小威实验室。
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