Results 11 to 20 of about 204,377 (277)

On the Number of Independent Pieces of Information in a Functional Linear Model with a Scalar Response

open access: yesStats, 2020
In a functional linear model (FLM) with scalar response, the parameter curve quantifies the relationship between a functional explanatory variable and a scalar response.
Eduardo L. Montoya
doaj   +1 more source

Two-dimensional NMR inversion based on fast norm smoothing method

open access: yesEnergy Geoscience, 2022
Two-dimensional (2D) nuclear magnetic resonance (NMR) inversion operates with massive echo train data and is an ill-posed problem. It is very important to select a suitable inversion method for the 2D NMR data processing. In this study, we propose a fast,
Youlong Zou   +5 more
doaj   +1 more source

Resistant Nonparametric Smoothing with S-PLUS

open access: yesJournal of Statistical Software, 2004
In this paper we introduce and illustrate the use of an S-PLUS set of functions to fit M-type smoothing splines with the smoothing parameter chosen by a robust criterion (either a robust version of cross-validation or a robust version of Mallows's Cp ...
Eva Cantoni
doaj   +1 more source

Comparison of Remote Sensing Time-Series Smoothing Methods for Grassland Spring Phenology Extraction on the Qinghai–Tibetan Plateau

open access: yesRemote Sensing, 2020
Accurate evaluation of start of season (SOS) changes is essential to assess the ecosystem’s response to climate change. Smoothing method is an understudied factor that can lead to great uncertainties in SOS extraction, and the applicable situation for ...
Nan Li   +5 more
doaj   +1 more source

Automatic Smoothing Parameter Selection: A Survey [PDF]

open access: yesEmpirical Economics, 1988
This is a survey of recent developments in smoothing parameter selection for curve estimation. The first goal of this paper is to provide an introduction to the methods available, with discussion at both a practical and also a nontechnical level, including comparison of methods.
openaire   +1 more source

One Value of Smoothing Parameter vs Interval of Smoothing Parameter Values in Kernel Density Estimation

open access: yesActa Universitatis Lodziensis. Folia Oeconomica, 2017
Ad hoc methods in the choice of smoothing parameter in kernel density estimation, al­though often used in practice due to their simplicity and hence the calculated efficiency, are char­acterized by quite big error.
Aleksandra Katarzyna Baszczyńska
doaj   +1 more source

Robust smoothing of one‐dimensional data with missing and/or outlier values

open access: yesIET Signal Processing, 2021
Penalized least squares (PLS) is a popular data smoothing technique. However, existing PLS smoothing algorithms behave as low‐pass filters (LPF), and, hence, they may introduce distortions to bandpass signals.
Nasser Mourad
doaj   +1 more source

A simple test for normality for time series [PDF]

open access: yes, 2004
This paper considers testing for normality for correlated data. The proposed test procedure employs the skewness-kurtosis test statistic, but studentized by standard error estimators that are consistent under serial dependence of the observations.
Lobato, Ignacio N., Velasco, Carlos
core   +3 more sources

Small-Signal Stability Modeling for MMC-Based DC Grids With Voltage Slope Control and Influence Analysis of Parameters

open access: yesIEEE Access, 2022
In the flexible DC grids, selections of slope coefficients in system level controls and designs of smoothing reactors have a crucial influence on the system stability.
Hui Li, Xinqiao Fan, Sijia Liu
doaj   +1 more source

Resistant selection of the smoothing parameter for smoothing splines

open access: yesStatistics and Computing, 2001
Robust automatic selection techniques for the smoothing parameter of a smoothing spline are introduced. They are based on a robust predictive error criterion and can be viewed as robust versions of Cp and cross-validation. They lead to smoothing splines which are stable and reliable in terms of mean squared error over a large spectrum of model ...
Cantoni, Eva, Ronchetti, Elvezio
openaire   +3 more sources

Home - About - Disclaimer - Privacy