Gaussian random fields on the sphere: some probabilistic and statistical properties
15:30
Talk & Lecture
1
1816024
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2019-12-11
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Venue:Room 306 Ouyang Chunmei Building, Yuquan CampusAbstract:Let T(x), x\in S^2 be a real-valued Gaussian random field, where S^2 is the unit sphere in R^3. This talk is concerned with probabilistic and statistical properties of T. When T is isotropic, we show that many properties of T(x) such as regularity, geometric properties of the sample function x→T(x) are explicitly determined by the high-frequency behavior of its angular power spectrum. Moreover, optimal bounds for the prediction errors of the spherical Gaussian field T are derived. Contact Person: SU Zhonggen(suzhonggen@zju.edu.cn)
Professor Y.M. Xiao, Michigan State University
Y.M. Xiao
2019-12-16 16:04:36
School of Mathematical Sciences
Asymptotic distributions of some scale estimators in the linear regression model with infinite variance long memory errors
14:00
Talk & Lecture
2
1815967
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2019-12-11
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Venue:Room 306 Ouyang Chunmei Building, Yuquan CampusAbstract:Typically M estimators of regression parameters in the linear regression model are robust against heavy tails of the error distributions, but not scale invariant. To make them scale invariant one often uses the two robust scale parameter estimators, median of the absolute residuals s1 and the median of the absolute differences of pairwise residuals s2 in the definitions of these M estimators. Since M estimators are robust against heavy tail error distributions, it is natural to know if s1 and s2 are consistent under heavy tail error distribution assumptions. This talk will present their limiting distributions when the regression errors form a linear long memory moving average stationary process with α-stable (1 < α < 2) innovations, where the moving average coefficients aj ~ j d−1 , 0 < d < 1 − 1/α. It turns out that s2 has an α∗-stable limit distribution with α∗ = α(1 − d) < α while the consistency rate of s1 is generally worse than that of s2. In the case of symmetrically distributed errors, there is no difference in their consistency rate. The proof is based on the 2nd order asymptotic expansion of the empirical process of the stated infinite variance stationary sequence.Contact Person: SU Zhonggen(suzhonggen@zju.edu.cn)
Professor Hira L. Koul, Michigan State University
Professor Hira L. Koul
2019-12-16 15:31:04
School of Mathematical Sciences
Localized or local knowledge: how to understand disaster records in China's local gazatteers
9:00
Talk & Lecture
3
1815825
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2019-12-11
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Dagmar Schäfer, Honorary Professor, History of Technology, TU Berlin
Dagmar Schäfer
2019-12-16 13:53:15
Café , School of Humanities, Xixi Campus
Copies of the Xiaojing from Guiyijun Dunhuang
18:30
Talk & Lecture
4
1815769
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2019-12-11
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Imre Galambos, Faculty of Asian and Middle Eastern Studies,University of Cambridge
Imre Galambos
2019-12-14 11:33:10
Café , School of Humanities, Xixi Campus
Global solutions to the Burgers-Hilbert equation
14:30-15:30
Talk & Lecture
5
1794979
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2019-12-04
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Speaker: Prof. Alberto Bressan EberlyVenue: Lecture Hall, 4th Floor, Run Run Shaw Business Administration BuildingAbstract: In 2009 J.Biello and J.Hunter derived a balance law modeling nonlinear waves with constant frequency, obtained from Burgers' equation by adding the Hilbert transform as a sourceterm. Recent work has established the global existence of solutions in the space L^2(R), and a partial result on uniqueness. This talk will also describe the construction of piecewise smooth solutions, locally in time, providing a detailed analysis of the solution profile in a neighborhood of each shock. Various related open problems will be discussed.
Alberto Bressan Eberly, Family Chair Professor of Mathematics ,Director of Center for Interdisciplinary Mathematics, Pennsylvania State University
Alberto Bressan Eberly
2019-12-16 12:01:58
Yuquan Campus
The wave equation and Fourier analysis
10:30
Talk & Lecture
6
1794927
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2019-12-04
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Speaker: Prof. Christopher D.SoggeVenue: Lecture Hall, 4th Floor, Run Run Shaw Business Administration BuildingAbstract: Many problems in harmonic analysis involve the wave equation, and one can use Fourier analysis and Fourier integral operators to solve wave equations. We shall discuss several of these problems, including spherical maximal estimates, local smoothing bounds and Kakeya problems. We shall also go over recent decoupling estimates of Bourgain and Demeter that were inspired by the work of Wolff on regularity estimates for the wave equation. We shall also show how one can use Fourier analysis to solve critical nonlinear wave equations.
Christopher D.Sogge, Professor of Mathematics at Johns Hopkins University and the editor-in-chief of the American Journal of Mathematics
Christopher D.Sogge
2019-12-09 11:41:27
Yuquan Campus
Enhancing knowledge?——interdisciplinary collaborations between arts, sciences and medicine/humanities
19:00
Talk & Lecture
7
1794799
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2019-12-04
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Wolfgang Knapp,Universitaet der Künste Berlin
Wolfgang Knapp
2019-12-04 10:48:37
Library, Zijinggang Campus
‘Artificial Spermatid’-mediated genome editing
12:00
Talk & Lecture
8
1762667
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2019-11-22
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Title:Venue: A203, ZJE Building, International CampusSpeaker: Prof. Jinsong LiJinsong Li is a professor and director of State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences. He obtained his PhD from Institute of Zoology, Chinese Academy of Sciences, in 2002 and followed by postdoctoral training at Rockefeller University before joining SIBCB in 2007. His research is to establish high-efficient reprogramming strategies, generate high-quality reprogrammed cells, as well as to elucidate molecular mechanism of epigenetic reprogramming. He has made fundamental contributions to the establishment of androgenetic haploid embryonic stem cells (“artificial spermatids”) and haploid cell-mediated semi-cloned technology. Dr. Li has published extensively in numerous peer-reviewed journals including Cell, Nature, Cell Stem Cell, PNAS, Nat Cell Biol and Cell Res. Scan to sign up and for more information:
Jinsong Li, professor and director of State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences
Jinsong Li
2019-11-28 17:47:11
International Campus
The Artificial Muscle Center: a success among many innovative applications of electromagnetism in microtechnology
14:00
Talk & Lecture
9
1762660
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2019-11-22
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Speaker: Prof. Yves Perriard, École Polytechnique Fédérale de Lausanne, EPFLVenue: Room 405, No. 2 Teaching BuildingAbstract: Whenever something moves in the human body, our muscles do the work. However, while today it is part of everyday clinical practice to replace joints and bones with artificial parts, reconstruction medicine still has great difficulties finding a suitable replacement for damaged or destroyed muscles. There is one muscle in particular whose function is vital and is the subject of several studies, but without convincing results: the heart. Other muscles of the body actually share mechanical similarities with the heart, including the sphincter muscle, which, if damaged, can cause urinary incontinence. Facial muscles also share such similarities and must be replaced after an accident or injury. Although these muscles do not play a vital role in the body, they remain extremely important for patients’ quality of life, for example a well-functioning sphincter muscle is critical in order to avoid unpleasant side effects such as needing to wear diapers. The parallels between muscle types could allow the development of universal electromechanical multifunctional actuators. Within the new ?Center for Artificial Muscles?, EPFL, in cooperation with its partners in heart surgery - University of Bern and Reconstructive Medicine - University of Zürich, aims to become the world’s leading reference for the development and clinical transfer of a brand new technological approach for artificial muscles in the human body.The proposed keynote intends to show some examples realized in this new center together with multi-disciplinary projects linked woth industry.About the speaker:Yves Perriard obtained his Master in ‘Microengineering’ from EPFL in 1989 and his PhD form the Electrical Department in 1992. He became cofounder of the company Micro-Beam SA and had the lead of the company until 1998 doing special electric drives. In 1999 he joined EPFL as Senior Lecturer and in 2003 he was appointed Titular Professor and leader of the Integrated Actuators Laboratory. In 2009 he is also appointed Vice-Director of the Microengineering Institute EPFL Neuch?tel. Senior member IEEE and Member EPE, he is also vice-president of the EPE (European Power Electronics) society board in Brussels.Yves Perriard is interested in innovating, analyzing and creating new actuators associated with their electronic devices. The multi-disciplinary work of his research makes him strongly in contact with industries in Switzerland and abroad. Yves Perriard has published over 180 papers, 5 patents and is co-author of one book. He is associate editor of several journals. Teacher at the Bachelor and Master level, he received twice the best teacher award of the Engineering Faculty in 2005 and 2007. More information can be found on the Integrated Actuators Laboratory web site http://lai.epfl.ch. In 2018, he launched a brand new center at EPFL on artificial muscles thanks to a donation of the Werner Siemens Foundation.
Prof. Yves Perriard, École Polytechnique Fédérale de Lausanne, EPFL
Prof. Yves Perriard
2019-11-27 17:22:32
Yuquan Campus