Results 21 to 30 of about 279,449 (267)

Covariance between the forward recurrence time and the number of renewals

open access: yesModern Stochastics: Theory and Applications, 2021
Recurrence times and the number of renewals in $(0,t]$ are fundamental quantities in renewal theory. Firstly, it is proved that the upper orthant order for the pair of the forward and backward recurrence times may result in NWUC (NBUC) interarrivals.
Sotirios Losidis
doaj   +1 more source

Covariance-on-covariance regression

open access: yesBiometrics
ABSTRACT A covariance-on-covariance regression model is introduced in this manuscript. It is assumed that there exists (at least) a pair of linear projections on outcome covariance matrices and predictor covariance matrices such that a log-linear model links the variances in the projection spaces, as well as additional covariates of ...
Yi Zhao, Yize Zhao
openaire   +3 more sources

Analysis of epistasis: A genetic model for triploid endosperm traits

open access: yes浙江大学学报. 农业与生命科学版, 2007
A genetic model for triploid endosperm traits was proposed on the basis of diallel cross system to analyze additive by additive epistasis of direct effect (AA) and maternal effect (AmAm) along with direct additive effect, dominance effect, cytoplasm ...
CHENG Jun-qi   +3 more
doaj   +1 more source

Local Matrix Feature-Based Kernel Joint Sparse Representation for Hyperspectral Image Classification

open access: yesRemote Sensing, 2022
Hyperspectral image (HSI) classification is one of the hot research topics in the field of remote sensing. The performance of HSI classification greatly depends on the effectiveness of feature learning or feature design. Traditional vector-based spectral–
Xiang Chen   +3 more
doaj   +1 more source

Covariance-insured screening [PDF]

open access: yesComputational Statistics & Data Analysis, 2019
Modern bio-technologies have produced a vast amount of high-throughput data with the number of predictors far greater than the sample size. In order to identify more novel biomarkers and understand biological mechanisms, it is vital to detect signals weakly associated with outcomes among ultrahigh-dimensional predictors.
Kevin He   +7 more
openaire   +3 more sources

Multidimensional Rational Covariance Extension with Approximate Covariance Matching [PDF]

open access: yesSIAM Journal on Control and Optimization, 2018
31 pages (single column).
Axel Ringh   +2 more
openaire   +3 more sources

The calibration of GPS receivers applying the calibration bases

open access: yesGeodesy and Cartography, 2012
Till now there are no written standards and other legal documents for the calibration of GPS receivers. Self-calibration procedures are used for calibration of some types of instrument.
Jonas Skeivalas, Raimundas Putrimas
doaj   +1 more source

Refinement of amino‐acid conformation vs. difference density maps in time‐resolved serial femtosecond crystallography data analysis

open access: yesFEBS Open Bio, EarlyView.
The dFoCC pipeline starts with observed DED and resting‐state coordinates, which are then used to generate a library of triggered states. Correlation analysis of the calculated DED features of each candidate vs observed DED permits quantitative evaluation of candidate structural quality.
Meng Iao Fong   +3 more
wiley   +1 more source

Construction of nonsingular formulae of variance and covariance function of disturbing gravity gradient tensors

open access: yesGeodesy and Geodynamics, 2013
When the computational point is approaching the poles, the variance and covariance formulae of the disturbing gravity gradient tensors tend to be infinite, and this is a singular problem.
Liu Xiaogang   +3 more
doaj   +1 more source

Pricing of Pseudo-Swaps Based on Pseudo-Statistics

open access: yesRisks, 2023
The main problem in pricing variance, volatility, and correlation swaps is how to determine the evolution of the stochastic processes for the underlying assets and their volatilities.
Sebastian Franco, Anatoliy Swishchuk
doaj   +1 more source

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