Results 31 to 40 of about 1,107,546 (279)

Digital image contrast assessment based on the Weibull distribution parameters

open access: yesСистемный анализ и прикладная информатика, 2021
The goal of the studies described in the paper is to find a quantitative assessment that maximally correlates with the subjective assessment of the contrast image quality in the absence of reference image.
Y. I. Golub, F. V. Starovoitov
doaj   +1 more source

Learning to Rank Using Localized Geometric Mean Metrics

open access: yes, 2017
Many learning-to-rank (LtR) algorithms focus on query-independent model, in which query and document do not lie in the same feature space, and the rankers rely on the feature ensemble about query-document pair instead of the similarity between query ...
King, Irwin, Lyu, Michael, Su, Yuxin
core   +1 more source

Sharp Bounds by the Generalized Logarithmic Mean for the Geometric Weighted Mean of the Geometric and Harmonic Means

open access: yesJournal of Applied Mathematics, 2012
We present sharp upper and lower generalized logarithmic mean bounds for the geometric weighted mean of the geometric and harmonic means.
Wei-Mao Qian, Bo-Yong Long
doaj   +1 more source

Rank-preserving geometric means of positive semi-definite matrices

open access: yes, 2012
The generalization of the geometric mean of positive scalars to positive definite matrices has attracted considerable attention since the seminal work of Ando.
Bonnabel, Silvere   +2 more
core   +1 more source

Weighted inequalities for geometric means [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
A characterization of weights u , v u,v is given for which the geometric mean operator T f ( x ) = exp ⁡ ( 1 x ∫ 0 x ln f
Opic, B., Gurka, P.
openaire   +1 more source

Optimal two-parameter geometric and arithmetic mean bounds for the Sándor–Yang mean

open access: yesJournal of Inequalities and Applications, 2019
In the article, we provide the sharp bounds for the Sándor–Yang mean in terms of certain families of the two-parameter geometric and arithmetic mean and the one-parameter geometric and harmonic means.
Wei-Mao Qian   +3 more
doaj   +1 more source

The perils of measuring biodiversity responses to habitat change using mixed metrics

open access: yesConservation Letters, 2023
Existing quantitative syntheses on how biodiversity responds to anthropogenic habitat change appear to sometimes mix different biodiversity metrics in drawing inferences.
Mingxin Liu, Xinran Miao, Fangyuan Hua
doaj   +1 more source

Vector lattices and $f$-algebras: the classical inequalities

open access: yes, 2017
We prove an identity for sesquilinear maps from the Cartesian square of a vector space to a geometric mean closed Archimedean (real or complex) vector lattice, from which the Cauchy-Schwarz inequality follows.
Buskes, Gerard, Schwanke, Christopher
core   +1 more source

The geometric mean algorithm [PDF]

open access: yes, 2012
Bisection (of a real interval) is a well known algorithm to compute eigenvalues of symmetric matrices. Given an initial interval [a,b], convergence to an eigenvalue which has size much smaller than a or b may be made considerably faster if one replaces ...
Ralha, Rui
core   +1 more source

A Cloud Computing-Based Modified Symbiotic Organisms Search Algorithm (AI) for Optimal Task Scheduling

open access: yesSensors, 2022
The search algorithm based on symbiotic organisms’ interactions is a relatively recent bio-inspired algorithm of the swarm intelligence field for solving numerical optimization problems. It is meant to optimize applications based on the simulation of the
Ajoze Abdulraheem Zubair   +7 more
doaj   +1 more source

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