Results 11 to 20 of about 444,093 (258)

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

Robust covariance estimation for data fusion from multiple sensors [PDF]

open access: yes, 2011
This paper addresses the robust estimation of a covariance matrix to express uncertainty when fusing information from multiple sensors. This is a problem of interest in multiple domains and applications, namely, in robotics.
Lazarus, Samuel B.   +5 more
core   +1 more source

Influence of elektromagnetics vibrations refraction index to pseudodistance accuracy in GPS measurements

open access: yesGeodesy and Cartography, 2012
Research demonstrates the accuracy of pseudo distance measurements evaluating the impact of the refraction index and spread speed of vibrations in the vacuum.
Jonas Skeivalas
doaj   +1 more source

Modelowanie kowariancji kursów walutowych z zastosowaniem cen minimalnych i maksymalnych

open access: yesProblemy Zarządzania, 2019
The article presents a proposal for exchange rate modelling by means of minimum and maximum prices that enables a better description of dependencies in the foreign exchange market.
Piotr Fiszeder
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

THE CO-MOVEMENT CONNECTION BETWEEN THE GDP AND THE MAIN STOCK MARKET INDEX. THE CASES OF USA AND ROMANIA [PDF]

open access: yesAnalele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2015
A recurring problem among economists is that of the connection supposed to exist between the Gross Domestic Product and the main stock market index. Several studies have been conducted, trying to analyze the existence and the extent of this connection,
IOAN ROXANA
doaj  

Can temporal covariation and autocorrelation in demographic rates affect population dynamics in a raptor species?

open access: yesEcology and Evolution, 2020
Theoretical studies suggest that temporal covariation among and temporal autocorrelation within demographic rates are important features of population dynamics.
Rémi Fay   +4 more
doaj   +1 more source

Review on Efficiency and Anomalies in Stock Markets

open access: yesEconomies, 2020
The efficient-market hypothesis (EMH) is one of the most important economic and financial hypotheses that have been tested over the past century. Due to many abnormal phenomena and conflicting evidence, otherwise known as anomalies against EMH, some ...
Kai-Yin Woo   +3 more
doaj   +1 more source

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

Home - About - Disclaimer - Privacy