Results 111 to 120 of about 137,194 (317)

Quantile Regression with Classical Additive Measurement Errors [PDF]

open access: yes
This note derives the bias of the quantile regression estimator in the presence of classical additive measurement error, and show its connection to least squares models.
Gabriel Montes-Rojas
core  

Quantile Fourier transform, quantile series, and nonparametric estimation of quantile spectra

open access: yesCommunications in Statistics - Simulation and Computation
A nonparametric method is proposed for estimating the quantile spectra and cross-spectra introduced in Li (2012; 2014) as bivariate functions of frequency and quantile level. The method is based on the quantile discrete Fourier transform (QDFT) defined by trigonometric quantile regression and the quantile series (QSER) defined by the inverse Fourier ...
openaire   +2 more sources

Median and quantile conditional copulas

open access: yesDependence Modeling
This article studies the conditional dependency between random variables, conditionally upon a covariate (vector). The conditional copula fully characterizes this conditional dependency.
Gijbels Irène, Matterne Margot
doaj   +1 more source

Detection of Factors Affecting Rainfall Intensity in Jakarta

open access: yesJurnal Ilmu Lingkungan
The increased intensity of rainfall is becoming one of the most pressing climate-related issues in many parts of the world. Detecting the factors that affect rainfall intensity requires a combination of modern technologies, such as weather satellites ...
Bagus Sumargo   +4 more
doaj   +1 more source

Decoupling Intrinsic Molecular Efficacy From Platform Effects: An Interpretable Machine Learning Framework for Unbiased Perovskite Passivator Discovery

open access: yesAdvanced Science, EarlyView.
This study establishes an interpretable machine learning framework that disentangles the intrinsic molecular efficacy of passivators from experimental platform effects—enabling unbiased, high‐throughput discovery of effective perovskite surface modifiers.
Jing Zhang   +5 more
wiley   +1 more source

Quantile and probability curves without crossing [PDF]

open access: yes
The most common approach to estimating conditional quantile curves is to fit a curve, typically linear, pointwise for each quantile. Linear functional forms, coupled with pointwise fitting, are used for a number of reasons including parsimony of the ...
Alfred Galichon   +2 more
core  

Physics‐Constrained Constitutive Learning of Rate‐Limiting Timescales for Efficient Hydrogen‐Based Direct Reduction for Green Steel Making

open access: yesAdvanced Science, EarlyView.
A conversion‐resolved constitutive framework is developed for the hydrogen‐based direct reduction of iron oxide pellets. Effective reaction and transport timescales are inferred directly from measured trajectories and mapped against operating conditions, pellet architecture, and composition. The analysis reveals how late‐stage transport control emerges
Anurag Bajpai   +3 more
wiley   +1 more source

A Tutorial on Quantile-Quantile Plots

open access: yes, 2018
This is a tutorial on quantile-quantile plots, a technique for determining if different data sets originate from populations with a common distribution. The technique can be used to determine if a data set is normally distributed, and to optimize the transformation parameter of variance-stabilizing Box-Cox transformation models.
openaire   +1 more source

Integrated Degradation Models in R Using iDEMO

open access: yesJournal of Statistical Software, 2012
Degradation models are widely used to assess the lifetime information for highly reliable products with quality characteristics whose degradation over time can be related to reliability.
Chien-Yu Peng, Ya-Shan Cheng
doaj  

Asymmetric Effect of Monetary and Fiscal Policy Uncertainty on the Energy Transition: Evidence from the United States

open access: yesგლობალიზაცია და ბიზნესი
This research attempts to investigate how uncertainty in fiscal policy (FPU) and monetary policy (MPU) affects the US energy transition. While previous literature took the total renewable energy consumption (REC) as an indicator for the energy transition,
Mohammed Amine Mouffok   +3 more
doaj   +1 more source

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