532期

最新文章

• Handbook of Mixture Analysis AI翻译
  作者：Chen, Yen-Chi
  作者单位：University of Washington; University of Washington Seattle
• Rejoinder to A Tuning-Free Robust and Efficient Approach to High-Dimensional Regression AI翻译
  作者：Wang, Lan; Peng, Bo; Bradic, Jelena; Li, Runze; Wu, Yunan
  作者单位：University of Miami; Adobe Systems Inc.; University of California System; University of California San Diego; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; University of Minnesota System; University of Minnesota Twin Cities
• Optimal Designs of Two-Phase Studies AI翻译
  作者：Tao, Ran; Zeng, Donglin; Lin, Dan-Yu
  作者单位：Vanderbilt University; Vanderbilt University; University of North Carolina; University of North Carolina Chapel Hill
  摘要：The two-phase design is a cost-effective sampling strategy to evaluate the effects of covariates on an outcome when certain covariates are too expensive to be measured on all study subjects. Under such a design, the outcome and inexpensive covariates are measured on all subjects in the first phase and the first-phase information is used to select subjects for measurements of expensive covariates in the second phase. Previous research on two-phase studies has focused largely on the inference pr...
• Empirical Frequency Band Analysis of Nonstationary Time Series AI翻译
  作者：Bruce, Scott A.; Tang, Cheng Yong; Hall, Martica H.; Krafty, Robert T.
  作者单位：George Mason University; Pennsylvania Commonwealth System of Higher Education (PCSHE); Temple University; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh; Pennsylvania Commonwealth System of Higher Education (PCSHE); University of Pittsburgh
  摘要：The time-varying power spectrum of a time series process is a bivariate function that quantifies the magnitude of oscillations at different frequencies and times. To obtain low-dimensional, parsimonious measures from this functional parameter, applied researchers consider collapsed measures of power within local bands that partition the frequency space. Frequency bands commonly used in the scientific literature were historically derived, but they are not guaranteed to be optimal or justified f...
• A Bayesian Latent Class Model to Predict Kidney Obstruction in the Absence of Gold Standard AI翻译
  作者：Chang, Changgee; Jang, Jeong Hoon; Manatunga, Amita; Taylor, Andrew T.; Long, Qi
  作者单位：University of Pennsylvania; Emory University; Emory University
  摘要：Kidney obstruction, if untreated in a timely manner, can lead to irreversible loss of renal function. A widely used technology for evaluations of kidneys with suspected obstruction is diuresis renography. However, it is generally very challenging for radiologists who typically interpret renography data in practice to build high level of competency due to the low volume of renography studies and insufficient training. Another challenge is that there is currently no gold standard for detection o...
• A Tuning-free Robust and Efficient Approach to High-dimensional Regression AI翻译
  作者：Wang, Lan; Peng, Bo; Bradic, Jelena; Li, Runze; Wu, Yunan
  作者单位：University of Miami; Adobe Systems Inc.; University of California System; University of California San Diego; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; University of Minnesota System; University of Minnesota Twin Cities
  摘要：We introduce a novel approach for high-dimensional regression with theoretical guarantees. The new procedure overcomes the challenge of tuning parameter selection of Lasso and possesses several appealing properties. It uses an easily simulated tuning parameter that automatically adapts to both the unknown random error distribution and the correlation structure of the design matrix. It is robust with substantial efficiency gain for heavy-tailed random errors while maintaining high efficiency fo...
• The Statistical Face of a Region Under Monsoon Rainfall in Eastern India AI翻译
  作者：Jana, Kaushik; Sengupta, Debasis; Kundu, Subrata; Chakraborty, Arindam; Shaw, Purnima
  作者单位：Imperial College London; Indian Statistical Institute; Indian Statistical Institute Kolkata; George Washington University; Indian Institute of Science (IISC) - Bangalore; Indian Institute of Science (IISC) - Bangalore; Reserve Bank of India
  摘要：A region under rainfall is a contiguous spatial area receiving positive precipitation at a particular time. The probabilistic behavior of such a region is an issue of interest in meteorological studies. A region under rainfall can be viewed as a shape object of a special kind, where scale and rotational invariance are not necessarily desirable attributes of a mathematical representation. For modeling variation in objects of this type, we propose an approximation of the boundary that can be rep...
• Adaptive Sparse Estimation With Side Information AI翻译
  作者：Banerjee, Trambak; Mukherjee, Gourab; Sun, Wenguang
  作者单位：University of Southern California
  摘要：The article considers the problem of estimating a high-dimensional sparse parameter in the presence of side information that encodes the sparsity structure. We develop a general framework that involves first using an auxiliary sequence to capture the side information, and then incorporating the auxiliary sequence in inference to reduce the estimation risk. The proposed method, which carries out adaptive Stein's unbiased risk estimate-thresholding using side information (ASUS), is shown to have...
• Deep Knockoffs AI翻译
  作者：Romano, Yaniv; Sesia, Matteo; Candes, Emmanuel
  作者单位：Stanford University
  摘要：This article introduces a machine for sampling approximate model-X knockoffs for arbitrary and unspecified data distributions using deep generative models. The main idea is to iteratively refine a knockoff sampling mechanism until a criterion measuring the validity of the produced knockoffs is optimized; this criterion is inspired by the popular maximum mean discrepancy in machine learning and can be thought of as measuring the distance to pairwise exchangeability between original and knockoff...
• Fixed Effects Testing in High-Dimensional Linear Mixed Models AI翻译
  作者：Bradic, Jelena; Claeskens, Gerda; Gueuning, Thomas
  作者单位：University of California System; University of California San Diego; KU Leuven; KU Leuven
  摘要：Many scientific and engineering challenges-ranging from pharmacokinetic drug dosage allocation and personalized medicine to marketing mix (4Ps) recommendations-require an understanding of the unobserved heterogeneity to develop the best decision making-processes. In this article, we develop a hypothesis test and the corresponding p-value for testing for the significance of the homogeneous structure in linear mixed models. A robust matching moment construction is used for creating a test that a...