Functional data analysis with covariate-dependent mean and covariance structures
16:00, Nov.28
Talk & Lecture
1
2687223
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2022-11-23
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Speaker: LIN Huazhen,Southwestern University of Finance and EconomicsVenue: Online,Tencent Conference, ID: 441 837 276Abstract: Functional data analysis has emerged as a powerful tool in response to the ever increasing resources and efforts devoted to collecting information about response curves or anything varying over a continuum. However, limited progress has been made to link the covariance structure of response curves to external covariates, as most functional models assume a common covariance structure. We propose a new functional regression model with covariate-dependent mean and covariance structures. Particularly, by allowing the variances of the random scores to be covariate-dependent, we identify eigenfunctions for each individual from the set of eigenfunctions which govern the patterns of variation across all individuals, resulting in high interpretability and prediction power. We further propose a new penalized quasi-likelihood procedure, which combines regularization and B-spline smoothing, for model selection and estimation, and establish the convergence rate and asymptotic normality for the proposed estimators. The utility of the method is demonstrated via simulations as well as an analysis of the Avon Longitudinal Study of Parents and Children on parental effects on the growth curves of their offspring, which yields biologically interesting results.
Functional data analysis has emerged as a powerful tool in response to the ever increasing resources and efforts devoted to collecting information about response curves or anything varying over a continuum.
LIN Huazhen
2022-11-28 16:00:00
Online
Heterogeneous Overreaction in Expectation Formation : Evidence and Theory
14:00-16:00, Nov.23
Talk & Lecture
2
2687196
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2022-11-23
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Speaker: PEI Guangyu,Department of Economics,Chinese University of Hong KongVenue: Online, Tencent Conference(ID:803 511 877)Abstract: Using firm-level earnings forecasts and managerial guidance data, we construct guidance surprises for analysts, i.e., differences between managerial guidance and analysts’ initial forecasts. We document new evidence on expectation formation: (i) analysts overreact to guidance surprises; (ii) the overreaction is stronger for negative guidance surprises but weaker for larger surprises; and (iii) forecast revisions are neither symmetric in guidance surprises nor monotonic. We organize these facts with a model where analysts are uncertain about the quality of managerial guidance. Structural estimation reveals that a reasonable degree of ambiguity aversion is necessary to account for the documented heterogeneous overreaction.
Using firm-level earnings forecasts and managerial guidance data, we construct guidance surprises for analysts, i.e., differences between managerial guidance and analysts’ initial forecasts.
PEI Guangyu
2022-11-23 14:00:00
Online
Explore Scientific Images
15:30
Talk & Lecture
3
2679697
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2022-11-16
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Speaker: Carol SONGVenue: OnlineAbstract: This lecture highlights using images to illustrate and organize research ideas, and using graphics to demonstrate key points in academic research, and will introduce related softwares (Corel and Autodesk).
This lecture highlights using images to illustrate and organize research ideas, and using graphics to demonstrate key points in academic research, and will introduce related softwares (Corel and Autodesk).
Carol SONG
2022-11-18 14:26:25
Online
The Achievements of Yale School of Architecture's China Studio: Exploration of urban design development in China
Nov 15, 2022 9:00am(China) Nov 14,2022 8:00pm (US)
Talk & Lecture
4
2675898
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2022-11-09
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Speaker: Alan Plattus(Yale University)Abstract: Organized by the Zhejiang University , this seminar invites Alan Plattus, professor of Yale School of Architecture, to introduce the Advanced Studio at Yale as a teaching and research methodology, as well as share the past achievements and experiences of Yale School of Architecture's China studio. This seminar will introduce the outstanding examples of the Yale School of Architecture in international design education, as well as its future exploration of urban design in China.
Organized by the Zhejiang University , this seminar invites Alan Plattus, professor of Yale School of Architecture, to introduce the Advanced Studio at Yale as a teaching and research methodology, as well as share the past achievements and experiences of Yale School of Architecture's China studio.
Alan Plattus
2022-11-15 09:00:00
Online
Benefits of Weighted Training in Machine Learning and PDE-based Inverse Problems
4th Nov. 2022 16:00-17:30pm(Beijing)
Talk & Lecture
5
2665926
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2022-11-04
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Speaker:Yang Yunan (ETH Zurich)Avenue: Online Tencent Meeting ID: 153-737-210 153 737 210Abstract: Many models in machine learning and PDE-based inverse problems exhibit intrinsic spectral properties, which have been used to explain the generalization capacity and the ill-posedness of such problems. In this talk, we discuss weighted training for computational learning and inversion with noisy data. The highlight of the proposed framework is that we allow weighting in both the parameter space and the data space. The weighting scheme encodes both a priori knowledge of the object to be learned and a strategy to weight the contribution of training data in the loss function. We demonstrate that appropriate weighting from prior knowledge can improve the generalization capability of the learned model in both machine learning and PDE-based inverse problems.
Many models in machine learning and PDE-based inverse problems exhibit intrinsic spectral properties, which have been used to explain the generalization capacity and the ill-posedness of such problems. In this talk, we discuss weighted training for computational learning and inversion with noisy data. The highlight of the proposed framework is that we allow weighting in both the parameter space and the data space. The weighting scheme encodes both a priori knowledge of the object to be learned a
Yang Yunan
2022-11-04 16:00:00
online
ZJU-USYD Dialogue Series: Eye and Cancer Joint Seminar
2nd Nov. 2022 10:00am-12:00pm(Beijing)
Talk & Lecture
6
2663286
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2022-11-01
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Speaker: Prof. Andrew McLachlan(Head of Sydney Pharmacy School, The University of Sydney) Prof. Bo Yang(Dean of The Sci-Tech Academy, Zhejiang University) A/Prof. Fanfan Zhou(The University of Sydney) A/Prof. Michele Madigan(The University of Sydney) Dr. Ling Zhu(The University of Sydney) Prof. Qiaojun He(Zhejiang University) Prof. Hong Zhu(Zhejiang University) Prof. Jin-Jian Lu(University of Macau) Prof. Bei Jin(Sun Yat-sen University) Prof. Ke Wang(Jiangsu Institute of Nuclear Medicine)Venue: Online Zoom Meeting ID: 893 4602 6481 Meeting Link: https://uni-sydney.zoom.us/j/89346026481Abstract: The University of Sydney (USYD) and Zhejiang University (ZJU) are strategic partners, and both have a strong commitment to addressing society’s greatest challenges and advancing the drug development of human diseases. Both universities have notable research achievements in therapeutic development in human eye diseases and cancers.Jointly Hosted by the Sydney School of Pharmacy (USYD) and College of Pharmacy (ZJU), participated by University of Macau and Sun Yat-sen University. This workshop is to encourage constructive dialogues and explore collaborations to improve clinical outcomes in human eye diseases and cancers.It has relevance to World Health Organization (WHO) – One Health initiative. Specific topics to be covered include general knowledge advancement on eye health, immunotherapy development in eye diseases and cancers and the applications of novel technologies in eye disease and cancer treatment.The workshop will be beneficial to those who would like to take advantage of international research opportunities and particularly relevant to early career researchers who are keen to develop their global network.
Jointly Hosted by the Sydney School of Pharmacy (USYD) and College of Pharmacy (ZJU), participated by University of Macau and Sun Yat-sen University, this workshop is to encourage constructive dialogues and explore collaborations to improve clinical outcomes in human eye diseases and cancers.
Prof. Andrew McLachlan & Prof. Bo Yang
2022-11-02 10:00:00
Online
On non-dense orbits in finite volume quotient of Lie groups
16:00
Talk & Lecture
7
2648990
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2022-10-24
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Speaker: Dr. Lifan GUAN (Westlake University) Venue: 101, Building 2, Haina Court Abstract:The subject of homogeneous dynamics focuses on the study of dynamical properties of Lie subgroups acting on finite volume quotient of (mainly semisimple) Lie groups. As such, homogeneous dynamics is closely related to many different areas in mathematics. In particular, some problems in number theory can be reformulated and studied via homogeneous dynamics. In this talk, we will take a tour of no-dense orbits in homogeneous spaces and related problems in number theory. We will first explain the relationship and then show how it is used to solve problems in number theory. Finally, we will discuss some recent developments.
Dr. Lifan GUAN (Westlake University)
Dr. Lifan Guan
2022-10-27 15:21:49
Zijingang Campus
Stable capillary CMC hypersurfaces and the second Robin eigenvalue
10:00-12:00
Talk & Lecture
8
2648984
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2022-10-20
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Speaker: XIA Chao (Xiamen University)Venue: Tencent Conference ID: 880-635-181 Password: 1025Abstract: In this talk, we study stability of capillary CMC hypersurfaces. We prove that a capillary CMC hypersurface in a geodesic ball in space forms or a horoball in hyperbolic space is stable if and only if it is umbilical. In particular, the relationship between the stability problem and the estimate for the second Robin eigenvalue of the Jacobi operator will be mentioned. This is based on the joint work with Jinyu Guo and Guofang Wang.Introduction of the speaker: XIA Chao, Professor and Doctoral Director of Xiamen University, Fujian Province Minjiang Scholar. His main research area is geometric analysis and nonlinear partial differential equations. He has made a series of influential works in related fields, and his results have been published in top international journals such as J. Differential Geom., Arch. Ration. Mech. Anal., Adv. Math., Math. Ann.,Trans. AMS, etc.
XIA Chao, Professor and Doctoral Director of Xiamen University, Fujian Province Minjiang Scholar.
XIA Chao
2022-10-25 15:06:52
Online
Data Trade and Consumer Privacy
15:00-16:30
Talk & Lecture
9
2648908
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2022-10-19
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Speaker: Jiadong GuVenue: Yuanzheng Qizhen Hotel 4th floor
Jiadong Gu, University of North Carolina
Jiadong Gu
2022-10-21 14:01:15
Offline