Results 11 to 20 of about 166,859,727 (259)

Flexible Bayesian Dynamic Modeling of Correlation and Covariance Matrices [PDF]

open access: yes, 2020
Modeling correlation (and covariance) matrices can be challenging due to the positive-definiteness constraint and potential high-dimensionality. Our approach is to decompose the covariance matrix into the correlation and variance matrices and propose a ...
Shahbaba, Babak   +7 more
core   +1 more source

Sampled-data filtering with error covariance assignment [PDF]

open access: yes, 2001
Copyright [2001] IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services.
Huang, B, Wang, Z, Huo, P
core   +6 more sources

Covariance matrix estimation with heterogeneous samples [PDF]

open access: yes, 2008
We consider the problem of estimating the covariance matrix Mp of an observation vector, using heterogeneous training samples, i.e., samples whose covariance matrices are not exactly Mp.
Bidon, Stéphanie   +2 more
core   +1 more source

Covariance-Based Uncertainty Analysis of Reference Equations of State

open access: yes, 2020
This work presents a detailed methodology for uncertainty analysis applied to a reference equation of states (EOSs) based on Helmholtz energy. With increasing interest in uncertainties of thermal process models, it is important to quantify the property ...
Shengwei Wang (5689142)   +5 more
core   +3 more sources

Application of student's t-test, analysis of variance, and covariance

open access: yesAnnals of Cardiac Anaesthesia, 2019
Student's t test (t test), analysis of variance (ANOVA), and analysis of covariance (ANCOVA) are statistical methods used in the testing of hypothesis for comparison of means between the groups.
Prabhaker Mishra   +4 more
doaj   +1 more source

Analysis of the covariance matrix in FWI through density of covariance maps

open access: yesCT&F Ciencia, Tecnología & Futuro, 2020
Full waveform inversion (FWI) is a tool for the inversion of seismic data. There are several sources of uncertainty in the results provided by FWI. The quantification of such uncertainties has been studied through the resolution matrix (Res), which rests
Anyeres Neider Jimenez   +3 more
doaj   +1 more source

IPCO: Inference of Pathways from Co-variance analysis

open access: yesBMC Bioinformatics, 2020
Background Key aspects of microbiome research are the accurate identification of taxa and the profiling of their functionality. Amplicon profiling based on the 16S ribosomal DNA sequence is a ubiquitous technique to identify and profile the abundance of ...
Mrinmoy Das   +2 more
doaj   +1 more source

Analysis of covariance

open access: yesPsychiatry and Behavioral Sciences, 2017
Analysis of Covariance (ANCOVA) is a statistical method which is an extension of ANOVA that provides a way of statistically controlling the linear effect of variables one does not want to examine in a study.
Selim Kılıc
doaj   +1 more source

Nonparametric estimation of covariance functions by model selection [PDF]

open access: yes, 2009
We propose a model selection approach for covariance estimation of a stochastic process. Under very general assumptions, observing i.i.d replications of the process at fixed observation points, we construct an estimator of the covariance function by ...
Muniz Alvarez, Lilian   +9 more
core   +1 more source

Promoting education management new models application in teaching science [PDF]

open access: yesفصلنامه نوآوری‌های آموزشی, 2016
The purpose of this study was to survey the effect of teaching science using Education Management Model on 3th grade guidance school Baharestān city students academic achievement in knowledge, skill and attitude areas.
Mohammadrezā Behrangi   +2 more
doaj  

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