Permutations of n alphabets and related permanents
14:20-15:30
Talk & Lecture
1
2451917
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2021-12-16
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Speaker: SUN Zhiwei. Professor, Department of Mathematics, Nanjing UniversityVenue: Tencent meeting ID: 423-395-229, Link: https://meeting.tencent.com/dm/qzatm1SgMkdfDetails:f1648e65-beed-4a8b-b061-b1693de4299f.pdf
SUN Zhiwei. Professor, Department of Mathematics, Nanjing University
SUN Zhiwei
2021-12-17 20:11:37
Online
Activation discovery with FDR control: Application to fMRI data
9:00
Talk & Lecture
2
2451916
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2021-12-16
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Speaker: WANG Zhaojun, Professor, School of Mathematical Sciences, Nankai UniversityVenue: Tencent meeting ID: 615-465-700Abstract:Data arriving in “streams” from a large number of sources is ubiquitous, a portion of which usually incurs structural changes during the time-course of data acquisition. For example, in fMRI analysis, some brain regions become active associated with task-related stimuli or even in restingstates. Such a region corresponds to an activated data stream. We are aiming to measure the uncertainty of discovering data streams in activation via the tool of the false discovery rate (FDR). Borrowing ideas from recent developments of the FDR control methodologies, we propose a simple yet effective method to achieve this purpose meanwhile taking unknown asynchronous change patterns and spatial dependence into consideration. Its validity on controlling the FDR is justified by asymptotic analysis. Numerical experiments indicate that the proposed method is both accurate and powerful. It is also applied in a real fMRI data analysis. A R package SLIP is developed to implement the proposed method.
WANG Zhaojun, Professor, School of Mathematical Sciences, Nankai University
WANG Zhaojun
2021-12-17 20:03:08
Online
The Sixth West-Lake Photonics Symposium
09:40-17:30
Talk & Lecture
3
2449776
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2021-12-09
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Venue: Room 317, Administration Building, International CampusOnline Link: https://www.koushare.com/lives/rppm/944389
Various speakers
International Research Center for Advanced Photonics
2021-12-10 15:18:33
Hybrid
2021 "Belt-Road" & "BRICS" Forum for Advanced Photonics
14:10-21:10
Talk & Lecture
4
2449772
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2021-12-09
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Venue: Room 317, Administration Building, International Campus
2021 "Belt-Road" & "BRICS" forum for advanced photonics held by International Research Center for Advanced Photonics
International Research Center for Advanced Photonics
2021-12-09 15:12:02
International Campus
Open Problems on Sparse Representations in Unions of Bases
15:00
Talk & Lecture
5
2447287
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2021-12-02
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Speaker: Prof. SHEN Yi, Professor, Department of Mathematical Sciences, Zhejiang Sci-Tech UniversityTencent Meeting ID: 951 684 427 (passcode: 310027)Abstract:We consider sparse representations of signals from redundant dictionaries which are unions of several orthonormal bases. The spark introduced by Donoho and Elad plays an important role in sparse representations. However, numerical computations of sparks are generally combinatorial. For unions of several orthonormal bases, two lower bounds on the spark via the mutual coherence were established in previous work. We constructively prove that both of them are tight. Our main results give positive answers to Gribonval and Nielsen's open problem on sparse representations in unions of orthonormal bases. Constructive proofs rely on a family of mutual unbiased bases which first appears in quantum information theory.It is joint work with Prof. Song Li, Dr. Yuan Shen and Chenyun Yu.
Prof. SHEN Yi, Professor, Department of Mathematical Sciences, Zhejiang Sci-Tech University
SHEN Yi
2021-12-02 18:58:14
Online
Least squares model averaging and its extensions
14:00
Talk & Lecture
6
2447286
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2021-12-02
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Speaker: Prof. ZHANG Xinyu, Department of Statistics and Finance, University of Science and Technology of ChinaVenue: Tencent meeting ID: 307-424-966Abstract:Least squares model averaging has been explored in depth from the theoretical perspective and has been used widely in empirical applications. In this talk, I will introduce least squares model averaging and its asymptotic optimality, weight convergence, asymptotic distribution and finite sample property. Also, I will talk about its extension to high-dimensional case, averaging machine learning methods, and non-linear models.
Prof. ZHANG Xinyu, Department of Statistics and Finance, University of Science and Technology of China
ZHANG Xinyu
2021-12-02 18:44:58
Online
Theories of Innovation system and its development in China
19:30-21:30
Talk & Lecture
7
2445067
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2021-11-24
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Speakers:GU Shulin, Research Fellow at the Institute of Science and Development, CAS. She also serves as an Advisory Research Professor at the China Institute of Science and Technology Policy (CISTP) at Tsinghua University and Adjunct Professor of the Management School at Zhejiang UniversityILU Xielin, professor of School of Economics and Management, University of Chinese Academy of SciencesWANG Qing, Professor of Marketing and Innovation at Warwick Business School and adjunct Professor at Zhejiang University Management SchoolCHEN Jin, Professor in the School of Economics and Management at Tsinghua University and the Director of the Research Center of Technological Innovation at Tsinghua UniversityJIN Jun, associate professor on innovation management at School of Management, Zhejiang UniversityVenue: Zoom Meeting ID: 996 5200 1716Passcode: 675757Abstract:Chinese scholars recall the working and study experiences with Prof. Freeman, introduce their work on innovation system and development of theories of innovation system in China, and propose their outlooks of research and theories on innovation system in China.See details at:https://mp.weixin.qq.com/s/mNu93drw2JFMu-65tjqRug
CICALICS Lecture Series
GU Shulin, LIU Xielin, WANG Qing, CHEN Jin, JIN Jun
2021-12-01 13:35:33
Online
Quantile difference estimation with censoring indicators missing at random
16:00
Talk & Lecture
8
2445045
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2021-11-22
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Speaker: LIANG Hanying, Professor, School of Mathematical Science, Tongji UniversityVenue: Room 200-9, Run Run Shaw Business Administration Building, Yuquan CampusAbstract:In this talk, we propose estimator of distribution function when the data are right-censored and the censoring indicators are missing at random, and then establish their strong representations and asymptotic normality. Further, based on empirical likelihood method, we define maximum empirical likelihood estimators and smoothed log-likelihood ratios of two-sample quantile difference in the presence and absence of auxiliary information, respectively, and prove their asymptotic distributions. Simulation study and real data analysis are conducted to investigate the finite sample behavior of the proposed methods.
LIANG Hanying, Professor, School of Mathematical Science, Tongji University
LIANG Hanying
2021-11-25 13:26:55
Yuquan Campus
Trends in Language Contact and Change in Rural China: Consonantal Change in Ganluo Ersu
19:00-21:00
Talk & Lecture
9
2442660
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2021-11-17
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Speaker: Katia Chirkova, researcher, Institute of East Asian Languages, French Academy of Social Sciences, French National Research CenterVenue: Tencent meeting, meeting ID: 836 361 030
Katia Chirkova, researcher, Institute of East Asian Languages, French Academy of Social Sciences, French National Research Center
Katia Chirkova
2021-11-18 13:38:48
Online