Results 1 to 10 of about 39,022 (281)

Bayesian Nonparametric Monotone Regression. [PDF]

Environmetrics, 2020
AbstractIn many applications there is interest in estimating the relation between a predictor and an outcome when the relation is known to be monotone or otherwise constrained due to the physical processes involved. We consider one such application‐inferring time‐resolved aerosol concentration from a low‐cost differential pressure sensor. The objective
Wilson A, Tryner J, L'Orange C, Volckens J.   +3 more
europepmc   +6 more sources

Monotone Regression: A Simple and Fast O(n) PAVA Implementation

Journal of Statistical Software, 2022
Efficient coding and improvements in the execution order of the up-and-down-blocks algorithm for monotone or isotonic regression leads to a significant increase in speed as well as a short and simple O(n) implementation.
Frank M. T. A. Busing
doaj   +3 more sources

Bayesian Estimation of Marginal Quantiles with Missing Data in a Multivariate Regression Framework [PDF]

Entropy
In this article, we propose and study a class of multivariate regression models that account for ignorable missing data in skewed, potentially heavy-tailed response vectors with positive components.
Raúl Alejandro Morán-Vásquez, Mauricio A. Mazo-Lopera, Jose Antonio Escobar-Arias   +2 more
doaj   +2 more sources

Adaptive Monotone Shrinkage for Regression [PDF]

, 2015
We develop an adaptive monotone shrinkage estimator for regression models with the following characteristics: i) dense coefficients with small but important effects; ii) a priori ordering that indicates the probable predictive importance of the features.
Foster, Dean, Ma, Zhuang, Stine, Robert
core   +2 more sources

Using threshold Cox models to estimate change points in exposure-response relationships in an occupational epidemiological study of respirable crystalline silica and silicosis risk [PDF]

Frontiers in Public Health
IntroductionIn occupational epidemiology, accurately quantifying exposure-response relationships is crucial.MethodsWe introduce a threshold Cox model that includes a change point term to identify the optimal threshold.
Diezhang Wu, Kenneth A. Mundt, Jing Qian
doaj   +2 more sources

Calibrating multiplex serology for Helicobacter pylori [PDF]

Diagnostic and Prognostic Research
Background Helicobacter pylori (H. pylori) is a bacterium that colonizes the stomach and is a major risk factor for gastric cancer, with an estimated 89% of non-cardia gastric cancer cases worldwide attributable to H. pylori.
Emmanuelle A. Dankwa, Martyn Plummer, Daniel Chapman, Rima Jeske, Julia Butt, Michael Hill, Tim Waterboer, Iona Y. Millwood, Ling Yang, Christiana Kartsonaki   +9 more
doaj   +2 more sources

Reassessing estrogen receptor expression thresholds for breast cancer prognosis in HER2-negative patients using shape restricted modeling [PDF]

Scientific Reports
We used a novel shape-restricted Cox model to determine the desirable ER expression cutoff to predict breast cancer prognoses. Our model treats ER as a continuous variable using a flexible monotone-shaped Cox regression to assess its association with ...
Wenli Dong, Takeo Fujii, Jing Ning, Toshiaki Iwase, Jing Qin, Naoto T. Ueno, Yu Shen   +6 more
doaj   +2 more sources

Utilizing RNA-seq data in monotone iterative generalized linear model to elevate prior knowledge quality of the circRNA-miRNA-mRNA regulatory axis [PDF]

BMC Bioinformatics
Background Current experimental data on RNA interactions remain limited, particularly for non-coding RNAs, many of which have only recently been discovered and operate within complex regulatory networks.
Alikhan Anuarbekov, Jiří Kléma
doaj   +2 more sources

Dual active-set algorithm for optimal 3-monotone regression [PDF]

Известия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2022
The paper considers a shape-constrained optimization problem of constructing monotone regression which has gained much attention over the recent years. This paper presents the results of constructing the nonlinear regression with $3$-monotone constraints.
Gudkov, Alexandr A., Sidorov, Sergei Petrovich, Spiridonov, Kirill A.   +2 more
doaj   +1 more source

Bayesian and frequentist approach for the generalized log-logistic accelerated failure time model with applications to larynx-cancer patients

Alexandria Engineering Journal, 2022
The log-normal, log-logistic and Weibull distributions are commonly utilized to model survival data. Unimodal (or non-monotone) failure rate functions are modeled using the log-normal and the log-logistic families, whereas monotone failure rate functions
Abdisalam Hassan Muse, Samuel Mwalili, Oscar Ngesa, Huda M. Alshanbari, Saima Khan Khosa, Eslam Hussam   +5 more
doaj   +1 more source