Results 1 to 10 of about 106,270 (318)

A Location Estimator Based on a $U$-Statistic [PDF]

open access: bronzeThe Annals of Statistics, 1977
Let $X_1, \cdots, X_n$ be i.i.d. $F$, and estimate the median of $F$ by the median $T_\beta$ of $\beta X_i + (1 - \beta)X_j, i \neq j$, where $\beta$ is a fixed positive constant. Then $T_\beta$ is the solution of a $U$-statistic equation from which its asymptotic normality is readily derived. The asymptotic relative efficiency of $T_\beta$ is computed
J. S. Maritz, Margaret Wu, R. G. Stuadte
openalex   +4 more sources

A new method for determining geochemical anomalies: U-N and U-A fractal models [PDF]

open access: yesInternational Journal of Mining and Geo-Engineering, 2022
Undoubtedly, determining the threshold of anomalies and separating geochemical anomalies from background is one of the most important stages of minerals exploration.
Seyyed saeed Ghannadpour   +1 more
doaj   +1 more source

Delineation of mineral potential zone using U-statistic method in processing satellite remote sensing images [PDF]

open access: yesInternational Journal of Mining and Geo-Engineering, 2023
Delineating and mapping alteration zones in porphyry copper exploration is of special importance. In this study, satellite image processing techniques were employed to highlight alteration zones in the Zafarghand exploration area.
Seyyed saeed Ghannadpour   +3 more
doaj   +1 more source

Some remarks on the ergodic theorem for $U$-statistics

open access: yesComptes Rendus. Mathématique, 2023
In this note, we investigate the convergence of a $U$-statistic of order two having stationary ergodic data. We will find sufficient conditions for the almost sure and $L^1$ convergence and present some counter-examples showing that the $U$-statistic ...
Dehling, Herold   +2 more
doaj   +1 more source

Jackknife Empirical Likelihood Inference for the Variance Residual Life Function

open access: yesRevstat Statistical Journal, 2021
In life testing situations, the residual life time of a component which has survived t units of time is Xt = X −t|X > t. In this paper, we give a central limit theorem result for the estimator of Var(Xt), the variance residual life(VRL) function.
Vali Zardasht
doaj   +1 more source

A new test of multivariate nonlinear causality. [PDF]

open access: yesPLoS ONE, 2018
The multivariate nonlinear Granger causality developed by Bai et al. (2010) (Mathematics and Computers in simulation. 2010; 81: 5-17) plays an important role in detecting the dynamic interrelationships between two groups of variables.
Zhidong Bai   +5 more
doaj   +1 more source

U-Statistics based on spacings [PDF]

open access: yesJournal of Statistical Planning and Inference, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tung, David D, Jammalamadaka, S Rao
openaire   +3 more sources

The abstract of doctoral dissertation ‘Some research on hypothesis testing and nonparametric variable screening problems for high dimensional data’

open access: yesStatistical Theory and Related Fields, 2020
In this thesis, we construct test statistic for association test and independence test in high dimension, respectively, and study the corresponding theoretical properties under some regularity conditions.
Yongshuai Chen, Hengjian Cui
doaj   +1 more source

IMPROVEMEnTS In ASSESSInG THE FORECASTS ACCURACY - A CASE STUDY FOR ROMAnIAn MACROECOnOMIC FORECASTS [PDF]

open access: yesSerbian Journal of Management, 2013
The objective of this study is to introduce new forecasts’ accuracy measures for two types of predictions: point forecasts (radical of order n of the mean of squared errors, mean for the differencebetween each predicted value and the mean of the ...
Mihaela (Simionescu) Bratu
doaj   +1 more source

Home - About - Disclaimer - Privacy