Results 51 to 60 of about 1,005 (119)

Functional principal components analysis via penalized rank one approximation [PDF]

, 2008
Two existing approaches to functional principal components analysis (FPCA) are due to Rice and Silverman (1991) and Silverman (1996), both based on maximizing variance but introducing penalization in different ways.
Buja, Andreas, Huang, Jianhua Z., Shen, Haipeng   +2 more
core   +5 more sources

Conservative inference for counterfactuals

Journal of Causal Inference
In causal inference, the joint law of a set of counterfactual random variables is generally not identified. But many interesting quantities are functions of the joint distribution.
Balakrishnan Sivaraman, Kennedy Edward, Wasserman Larry   +2 more
doaj   +1 more source

Semiparametric discovery and estimation of interaction in mixed exposures using stochastic interventions

Journal of Causal Inference
Understanding the complex interactions among multiple environmental exposures is critical for assessing their combined impact on health outcomes. This study introduces InterXshift, a novel semiparametric method that provides a nonparametric definition of
McCoy David B., Hubbard Alan, van der Laan Mark, Schuler Alejandro   +3 more
doaj   +1 more source

Wavelet Deconvolution in a Periodic Setting with Long-Range Dependent Errors

, 2012
In this paper, a hard thresholding wavelet estimator is constructed for a deconvolution model in a periodic setting that has long-range dependent noise. The estimation paradigm is based on a maxiset method that attains a near optimal rate of convergence ...
Wishart, Justin Rory
core   +1 more source

Projection Estimates of Constrained Functional Parameters [PDF]

AMS classifications: 62G05; 62G07; 62G08; 62G20; 62G32;estimation;convex function;extreme value copula;Pickands dependence function;projection;shape constraint;support function;tangent ...
Fils-Villetard, A., Guillou, A., Segers, J.   +2 more
core   +1 more source

Estimating a Polya frequency function_2

, 2007
We consider the non-parametric maximum likelihood estimation in the class of Polya frequency functions of order two, viz. the densities with a concave logarithm. This is a subclass of unimodal densities and fairly rich in general.
Meyer, Mary, Pal, Jayanta Kumar, Woodroofe, Michael   +2 more
core   +1 more source

Modeling factors affecting poverty in Nusa Tenggara using the multivariate adaptive regression spline (MARS) method

Majalah Ilmiah Matematika dan Statistika
Poverty is still a fundamental problem in the economy of various regions or developing countries, including Indonesia. The Nusa Tenggara Islands are one of the regions in Central Indonesia, where East Nusa Tenggara Province is in 3rd place with 20.44 ...
Mulyasrihuda Arizal, Nurul Fitriyani, Bulqis Nebula Syechah   +2 more
doaj   +1 more source

Aggregated functional data model for Near-Infrared Spectroscopy calibration and prediction [PDF]

, 2013
Calibration and prediction for NIR spectroscopy data are performed based on a functional interpretation of the Beer-Lambert formula. Considering that, for each chemical sample, the resulting spectrum is a continuous curve obtained as the summation of ...
Dias, Ronaldo, Garcia, Nancy L., Ludwig, Guilherme, Saraiva, Marley A.   +3 more
core  

Nonparametric estimation by convex programming

, 2009
The problem we concentrate on is as follows: given (1) a convex compact set $X$ in ${\mathbb{R}}^n$, an affine mapping $x\mapsto A(x)$, a parametric family $\{p_{\mu}(\cdot)\}$ of probability densities and (2) $N$ i.i.d.
Juditsky, Anatoli B., Nemirovski, Arkadi S.   +1 more
core   +5 more sources

Discovery of critical thresholds in mixed exposures and estimation of policy intervention effects

Journal of Causal Inference
Regulations of chemical exposures often focus on individual substances, neglecting the amplified toxicity that can arise from multiple concurrent exposures.
McCoy David B., Hubbard Alan, van der Laan Mark, Schuler Alejandro   +3 more
doaj   +1 more source