Results 1 to 10 of about 99,558 (321)

Quantum U-statistics [PDF]

open access: yesJournal of Mathematical Physics, 2010
The notion of a U-statistic for an n-tuple of identical quantum systems is introduced in analogy to the classical (commutative) case: given a self-adjoint “kernel” K acting on (Cd)⊗r with r<n, we define the symmetric operator Un=(nr)∑βK(β) with K(β) being the kernel acting on the subset β of {1,…,n}.
Madalin Guta, Christina Butucea
openaire   +6 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

On normal approximations to U-statistics [PDF]

open access: yesThe Annals of Probability, 2009
Published in at http://dx.doi.org/10.1214/09-AOP474 the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Bentkus, Vidmantas   +2 more
openaire   +5 more sources

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

The LIL for canonical U-statistics [PDF]

open access: yesThe Annals of Probability, 2008
We give necessary and sufficient conditions for the (bounded) law of the iterated logarithm for canonical $U$-statistics of arbitrary order $d$, extending the previously known results for $d=2$. The nasc's are expressed as growth conditions on a parameterized family of norms associated with the $U$-statistics kernel.
Adamczak, Radosław, Latała, Rafał
openaire   +4 more sources

DESIGN BASED INCOMPLETE U-STATISTICS [PDF]

open access: yesStatistica Sinica, 2021
49 ...
Wei Zheng, Xiangshun Kong
openaire   +3 more sources

Home - About - Disclaimer - Privacy