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作者：Cai, Yun; Gu, Hong; Kenney, Toby
作者单位：Dalhousie University
摘要：Deconvolution is the important problem of estimating the distribution of a quantity of interest from a sample with additive measurement error. Nearly all infinite-dimensional deconvolution methods in the literature use Fourier transformations. These methods are mathematically neat, but unstable, and produce bad estimates when signal-noise ratio or sample size are low. A popular alternative is to maximize penalized likelihood for a finite-dimensional basis expansion of the unknown density. We d...
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作者：Joseph, V. Roshan
作者单位：Georgia Institute of Technology; University System of Georgia; Georgia Institute of Technology
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作者：Liu, Xing
作者单位：Connecticut State University System; Eastern Connecticut State University
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作者：Sun, Yifei; Chiou, Sy Han; Huang, Chiung-Yu
作者单位：Columbia University; Southern Methodist University; University of California System; University of California San Francisco
摘要：Accurate prediction of recurrent clinical events is crucial for effective management of chronic conditions such as cancer and cardiovascular disease. In recent years, longitudinal health informatics databases, which routinely collect data on repeated clinical events, have been increasingly used to construct risk prediction models. We introduce a novel nonparametric framework to predict recurrent events on a gap time scale using survival tree ensembles. Our framework incorporates two predictive...
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作者：Chang, Jinyuan; Jiang, Qing; Mcelroy, Tucker; Shao, Xiaofeng
作者单位：Southwestern University of Finance & Economics - China; Southwestern University of Finance & Economics - China; Chinese Academy of Sciences; Nanjing Institute of Geology & Paleontology, CAS; Academy of Mathematics & System Sciences, CAS; Beijing Normal University; Washington University (WUSTL); Washington University (WUSTL)
摘要：The spectral density matrix is a fundamental object of interest in time series analysis, and it encodes both contemporary and dynamic linear relationships between component processes of the multivariate system. In this article we develop novel inference procedures for the spectral density matrix in the high-dimensional setting. Specifically, we introduce a new global testing procedure to test the nullity of the cross-spectral density for a given set of frequencies and across pairs of component...
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作者：Huang, Jiaqi; Zhao, Wenbiao; Zhu, Lixing
作者单位：Beijing Normal University; China University of Mining & Technology; Beijing Normal University; Beijing Normal University Zhuhai
摘要：This article proposes an adaptive-to-model test to check the null hypothesis with no more than one coordinate of the response vector relating to the predictor vector in parametric multi-response regressions. To this end, we decompose the null hypothesis into several mutually exclusive sub-null hypotheses and suggest a model identification to construct an adaptive-to-sub-null hypothesis test tackling their mutual exclusiveness, and an adaptive-to-regression test handling the regression function...
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作者：Ohnishi, Yuki; Karmakar, Bikram; Kar, Wreetabrata
作者单位：Yale University; State University System of Florida; University of Florida; State University of New York (SUNY) System; University at Albany, SUNY; University at Buffalo, SUNY
摘要：Organizations are increasingly relying on digital communications, such as targeted e-mails and mobile notifications, to engage with their audiences. Despite the evident advantages like cost-effectiveness and customization, assessing the effectiveness of such communications from observational data poses various statistical challenges. An immediate challenge is to adjust for targeting rules used in these communications. When digital communications involve a sequence of e-mails or notifications, ...
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作者：Lei, Lihua
作者单位：Stanford University; Stanford University
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作者：Ward, Kes; Dilillo, Giuseppe; Eckley, Idris; Fearnhead, Paul
作者单位：Lancaster University; Istituto Nazionale Astrofisica (INAF); Lancaster University
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作者：Augustin, Nicole; Albrecht, Axel; Anaya-Izquierdo, Karim; Davis, Alice; Meining, Stefan; Puhlmann, Heike; Wood, Simon
作者单位：University of Edinburgh
摘要：Using German forest health monitoring data we investigate the main drivers leading to tree mortality and the association between defoliation and mortality; in particular (a) whether defoliation is a proxy for other covariates (climate, soil, water budget); (b) whether defoliation is a tree response that mitigates the effects of climate change and (c) whether there is a threshold of defoliation which could be used as an early warning sign for irreversible damage. Results show that environmental...
