Results 31 to 40 of about 312,758 (315)

Keypoints class distribution based entropy for weighting scheme on image classification

open access: yesJournal of King Saud University: Computer and Information Sciences, 2022
In bag-of-visual words (BoVW), a weighting scheme is applied to improve the discriminative power of visual words, which affect the performance of image classification. However, the weighting schemes in the BoVW model did not utilize the information class
Pulung Nurtantio Andono   +1 more
doaj   +1 more source

Nonexistence of a class of variate generation schemes [PDF]

open access: yesOperations Research Letters, 2003
The authors are motivated by a problem arising in the regenerative analysis of discrete-event system simulation and ask the question whether a certain class of random variate generation schemes exists or no. More precisely, while for many systems (as Markov chains, e.g.) regeneration times are easily determined by observing the sample paths, this is ...
Shane G. Henderson, Peter W. Glynn
openaire   +1 more source

Implementing detailed nucleation predictions in the Earth system model EC-Earth3.3.4: sulfuric acid–ammonia nucleation [PDF]

open access: yesGeoscientific Model Development
Representing detailed atmospheric aerosol processes in global Earth system models (ESMs) has proven to be challenging from both a computational and a parameterization perspective.
C. Svenhag   +6 more
doaj   +1 more source

Deformation Characteristics of the Surrounding Rock of a Six-Lane Multiarch Tunnel under Different Excavation Conditions

open access: yesAdvances in Materials Science and Engineering, 2021
Highway tunnel plays an increasingly prominent role in the development of high-grade highway traffic in mountainous countries or regions. Therefore, it is necessary to explore the deformation characteristics of the surrounding rock of a six-lane ...
Lina Luo, Gang Lei, Haibo Hu
doaj   +1 more source

gL1 Scheme for Solving a Class of Generalized Time-Fractional Diffusion Equations

open access: yesMathematics, 2022
In this paper, a numerical scheme based on a general temporal mesh is constructed for a generalized time-fractional diffusion problem of order α. The main idea involves the generalized linear interpolation and so we term the numerical scheme the gL1 ...
Xuhao Li, Patricia J. Y. Wong
doaj   +1 more source

Approximation schemes for a class of subset selection problems [PDF]

open access: yesTheoretical Computer Science, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Pruhs, Kirk, Woeginger, Gerhard J.
openaire   +2 more sources

Altitude-dependent formation of polar mesospheric clouds: charged nucleation and in situ ice growth on zonal and daily scales [PDF]

open access: yesAtmospheric Chemistry and Physics
Polar mesospheric clouds (PMCs), composed of ice particles, play a crucial role in mesospheric H2O redistribution, yet their formation mechanism remains incompletely understood. Using the Aeronomy of Ice in the Mesosphere (AIM) satellite observations, we
L. Zhang, Z. Liu, B. Tinsley
doaj   +1 more source

The Micro Socio-Economic Class scheme

open access: yes, 2023
This document describes the development of the Micro Socio-Economic Class Scheme (MSECS), which was assessed against other class schemes by Hertel, Barone, Smallenbroek (2023).
Carlo Barone   +2 more
core   +1 more source

Numerical Anisotropy Study of a Class of Compact Schemes [PDF]

open access: yesJournal of Scientific Computing, 2014
We study the numerical anisotropy existent in compact difference schemes as applied to hyperbolic partial differential equations, and propose an approach to reduce this error and to improve the stability restrictions based on a previous analysis applied to explicit schemes.
Adrian Sescu, Ray Hixon
openaire   +3 more sources

Wavelet-based fragile watermarking scheme for image authentication [PDF]

open access: yes, 2007
We propose a fragile watermarking scheme in the wavelet transform domain that is sensitive to all kinds of manipulations and has the ability to localize the tampered regions.
Si, Huayin, Li, Chang-Tsun
core   +1 more source

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