Results 11 to 20 of about 11,718 (208)

Extreme-value statistics from Lagrangian convex hull analysis for homogeneous turbulent Boussinesq convection and MHD convection

New Journal of Physics, 2017
We investigate the utility of the convex hull of many Lagrangian tracers to analyze transport properties of turbulent flows with different anisotropy. In direct numerical simulations of statistically homogeneous and stationary Navier–Stokes turbulence ...
J Pratt, A Busse, W-C Müller, N W Watkins, S C Chapman   +4 more
doaj   +1 more source

A Simple Encompassing Test for the Deterministic and Bilinear Unit Root Models

Austrian Journal of Statistics, 2016
A new parameters’ encompassing test is proposed for deciding between the deterministic unit root processes with a structural break and the bilinear unit root model without such break.
Wojciech W. Charemza, Svetlana Makarova
doaj   +1 more source

JEL Ratio Test for Independence of Time to Failure and Cause of Failure in Competing Risks Data

Statistica
In the present article, we propose a Jackknife empirical likelihood (JEL) ratio test for testing the independence of time to failure and cause of failure in competing risks data. We use the U-statistics theory to derive the JEL ratio test. The asymptotic
Narayanan Sreelakshmy, Engakkattu Purushothaman Sreedevi   +1 more
doaj   +1 more source

A High-Dimensional Cramér–von Mises Test

Mathematics
The Cramér–von Mises test provides a useful criterion for assessing goodness of fit in various problems. In this paper, we introduce a novel Cramér–von Mises-type test for testing distributions of high-dimensional continuous data.
Danna Zhang, Mengyu Xu
doaj   +1 more source

Multi-RIS Communication Systems: Asymptotic Analysis of Best RIS Selection for i.n.i.d. Random Variables Using Extreme Value Theory

IEEE Access
We investigate the performance of multiple reconfigurable intelligent surfaces (multi-RIS) systems where the RIS link with the highest signal-to-noise ratio (SNR) is selected at the destination.
G. Srinivas Sagar, Sheetal Kalyani
doaj   +1 more source

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Multivariate spatial conditional quantiles on hyperspheres in the presence of measurement error

Results in Applied Mathematics
Quantiles constitute a fundamental construct in probability theory and mathematical statistics, serving as an indispensable tool across a wide spectrum of applications.
Nourelhouda Taachouche, Salim Bouzebda
doaj   +1 more source

Stationary-State Statistics of a Binary Neural Network Model with Quenched Disorder

Entropy, 2019
In this paper, we study the statistical properties of the stationary firing-rate states of a neural network model with quenched disorder. The model has arbitrary size, discrete-time evolution equations and binary firing rates, while the topology and the ...
Diego Fasoli, Stefano Panzeri
doaj   +1 more source

Leveraging Symbolic Artificial Intelligence and Fuzzy Logic for Materials Science: A Review of Methods, Challenges, and Applications to Scarce and Imperfect Experimental Data

Advanced Engineering Materials, EarlyView.
This article explores the transformative potential of symbolic artificial intelligence (AI) in the field of materials science, particularly in leveraging experimental data. The article presents several symbolic AI models and discusses their applications in materials science.
Ahmed Amrani, Mohamed‐Ali Belloum, Laurence Boudet, Valentin Fouillard, Edwin Friedmann, Guillaume Lacharme, Ali Mahmoud, Jean‐Philippe Poli   +7 more
wiley   +1 more source

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

Advanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang, Christopher Wöpke, Toni Seiler, Jared Faisst, Mathias List, Meike Kuhn, Bekcy Joseph, Alexander Ehm, Dietrich R. T. Zahn, Yana Vaynzof, Eva M. Herzig, Roderick C. I. Mackenzie, Uli Würfel, Maria Saladina, Carsten Deibel   +14 more
wiley   +1 more source