Results 81 to 90 of about 296,140 (309)

Covariance analysis of symmetry energy observables from heavy ion collision

open access: yesPhysics Letters B, 2015
Using covariance analysis, we quantify the correlations between the interaction parameters in a transport model and the observables commonly used to extract information of the Equation of State of Asymmetric Nuclear Matter in experiments.
Yingxun Zhang, M.B. Tsang, Zhuxia Li
doaj   +1 more source

A new class of nonseparable space-time covariance models [PDF]

open access: yes, 2008
The aim of this work is to construct nonseparable, stationary covariance functions for processes that vary continuously in space and time. Stochastic modeling of phenomena over space and time is important in many areas of applications such as ...
Fonseca, Thaís C. O., Steel, Mark F. J.
core  

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

open access: yesAdvanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano   +18 more
wiley   +1 more source

The Scale Analysis of Bivariate Non-Gaussian Time Series via Wavelet Cross-Covariance [PDF]

open access: yes, 1998
this paper we study the scale analysis of bivariate time series through use of the wavelet cross-covariance. If
A. Serroukh   +2 more
core  

The Analysis of Very Small Samples of Repeated Measurements [PDF]

open access: yes
The statistical analysis of repeated measures or longitudinal data always requires the accommodation of the covariance structure of the repeated measurements at some stage in the analysis.
Skene, Simon Scott
core   +1 more source

Covariance analysis of the Coulomb explosion of ammonia induced by intense nanosecond laser at 532 nm [PDF]

open access: yes, 2005
The Coulomb explosion of ammonia clusters induced by nanosecond laser at 532 not with an intensity of similar to 10(12) Wcm(-2) has been studied by time of flight mass spectrometry. The dominant multiply charged ions are N3+ and N2+ with kinetic energies
李海洋   +5 more
core   +1 more source

AI–Guided 4D Printing of Carnivorous Plants–Inspired Microneedles for Accelerated Wound Healing

open access: yesAdvanced Materials, EarlyView.
This work presents an artificial intelligence (AI)‐guided 4D‐printed microneedle platform inspired by carnivorous plants for wound healing. A thermo‐responsive shape memory polymer enables body temperature–triggered self‐coiling for autonomous wound closure.
Hyun Lee   +21 more
wiley   +1 more source

Discriminant analysis of Gaussian spatial data with exponential covariance structure

open access: yesLietuvos Matematikos Rinkinys, 2005
This paper considers the discrimination of the observation of the stationary Gaussian random field belonging to one of two populations with different means and covariance functions.
Kęstutis Dučinskas
doaj   +1 more source

Estimating High Dimensional Covariance Matrices and its Applications [PDF]

open access: yes
Estimating covariance matrices is an important part of portfolio selection, risk management, and asset pricing. This paper reviews the recent development in estimating high dimensional covariance matrices, where the number of variables can be greater ...
Jushan Bai, Shuzhong Shi
core  

General covariance from the perspective of Noether's theorems [PDF]

open access: yes, 2002
Analysis of Emmy Noether's 1918 theorems provides an illuminating method for testing the consequences of coordinate generality, and for exploring what else must be added to this requirement in order to give general covariance its far-reaching physical ...
Brading, Katherine   +2 more
core  

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