Results 111 to 120 of about 5,976,249 (348)

On Modeling X-Ray Diffraction Intensity Using Heavy-Tailed Probability Distributions: A Comparative Study

open access: yesCrystals
Crystallography, a cornerstone of materials science, provides critical insights into material structures through techniques such as X-ray diffraction (XRD).
Farouq Mohammad A. Alam
doaj   +1 more source

A characterization of the set of fixed points of the Quicksort transformation

open access: yes, 2000
The limiting distribution \mu of the normalized number of key comparisons required by the Quicksort sorting algorithm is known to be the unique fixed point of a certain distributional transformation T -- unique, that is, subject to the constraints of ...
Fill, James Allen, Janson, Svante
core   +8 more sources

The Weibull-Power Cauchy distribution: model, properties and applications

open access: yes, 2017
We propose a new three-parameter distribution with increasing, decreasing, reversed-J and upside-down bathtub shaped hazard rate, called the Weibull-power Cauchy distribution. We obtain explicit expressions for the mode, ordinary, negative and incomplete
M. H. Tahir   +4 more
semanticscholar   +1 more source

Spherical matrix distributions and cauchy quotients [PDF]

open access: yesStatistics & Probability Letters, 1989
Abstract It is shown that matrix quotients of submatrices of a spherical matrix are distributed as matrix Cauchy. This generalizes known results for scalar ratios of independent normal variates. The derivations are simple and make use of the theory of invariant measures on manifolds.
openaire   +2 more sources

Observation of Optical Precursor in Time‐Energy‐Entangled W Triphotons

open access: yesAdvanced Science, EarlyView.
This study reports the observation of optical precursors at the triphoton level through the SSWM process. By appropriately adjusting the optical depth (OD), optical precursors are effectively separated from the main wave through utilizing the slow‐light effect to manipulate the triphoton temporal correlations in the group delay regime.
Zhou Feng   +5 more
wiley   +1 more source

Beyond Planar: Enhanced Performance of Hollow Fiber Dielectric Elastomer Actuators

open access: yesAdvanced Science, EarlyView.
This study presents a comprehensive analysis of hollow fiber dielectric elastomer actuators, highlighting their superior strain performance compared to planar actuators. By combining analytical modeling, numerical simulations, and experiments, it identifies optimal fiber geometries that maximize actuation efficiency.
Sina Jafarzadeh, Anne Ladegaard Skov
wiley   +1 more source

NSCT Domain Additive Watermark Detection Using RAO Hypothesis Test and Cauchy Distribution

open access: yes, 2016
We presented a RAO hypothesis detector by modeling Cauchy distribution for the Nonsubsampled Contourlet Transform (NSCT) subband coefficients in the field of additive spread spectrum image watermarking. Firstly, the NSCT subband coefficients were modeled
Hongbo Bi   +3 more
semanticscholar   +1 more source

SGCD: High‐Resolution Spatial Domain Characterization via Data Interpolation and Cell‐Type Deconvolution

open access: yesAdvanced Science, EarlyView.
SGCD presents a novel approach for tissue spatial domain identification by employing interpolation to estimate inter‐spot gene expression and deconvolution to resolve cell‐type composition in both sampled and interstitial regions. By integrating gene expression, cell type, and spatial coordinates within a graph contrastive learning framework, SGCD ...
Tianjiao Zhang   +7 more
wiley   +1 more source

A Binary Superior Tracking Artificial Bee Colony with Dynamic Cauchy Mutation for Feature Selection

open access: yesComplexity, 2020
This paper aims to propose an improved learning algorithm for feature selection, termed as binary superior tracking artificial bee colony with dynamic Cauchy mutation (BSTABC-DCM).
Xianghua Chu   +5 more
doaj   +1 more source

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