Results 41 to 50 of about 527,249 (162)

Accelerating Extreme Search of Multidimensional Functions Based on Natural Gradient Descent with Dirichlet Distributions

open access: yesMathematics, 2022
The high accuracy attainment, using less complex architectures of neural networks, remains one of the most important problems in machine learning. In many studies, increasing the quality of recognition and prediction is obtained by extending neural ...
Ruslan Abdulkadirov   +2 more
doaj   +1 more source

Affine Calculus for Constrained Minima of the Kullback–Leibler Divergence

open access: yesStats
The non-parametric version of Amari’s dually affine Information Geometry provides a practical calculus to perform computations of interest in statistical machine learning.
Giovanni Pistone
doaj   +1 more source

Ancient Living Organisms Escaping from, or Imprisoned in, the Vents?

open access: yesLife, 2017
We have recently criticised the natural pH gradient hypothesis which purports to explain how the difference in pH between fluid issuing from ancient alkali vents and the more acidic Hadean ocean could have driven molecular machines that catalyse ...
J. Baz Jackson
doaj   +1 more source

Improving Flat Maxima with Natural Gradient for Better Adversarial Transferability

open access: yesBig Data and Cognitive Computing
Deep neural networks are vulnerable and susceptible to adversarial examples, which can induce erroneous predictions by injecting imperceptible perturbations.
Yunfei Long, Huosheng Xu
doaj   +1 more source

Variable-step blind source separation method with adaptive momentum factor

open access: yesTongxin xuebao, 2017
A variable-step blind source separation algorithm based on the natural gradient with adaptive momentum factor was proposed,which could cope with the determined blind source separation in the environment of stationary and non-stationary.Function ...
Tian-qi ZHANG   +3 more
doaj  

Relationships among water and gas transport properties in soils from natural and induced clay gradients

open access: yesVadose Zone Journal, 2022
Clay content in soil potentially has strong influence on soil structure and thereby controls soil physical, hydraulic, and gas transport properties. Only few studies have investigated the effect of clay content on saturated hydraulic conductivity (Ks ...
Ting Yang   +5 more
doaj   +1 more source

Information-Geometric Optimization with Natural Selection

open access: yesEntropy, 2020
Evolutionary algorithms, inspired by natural evolution, aim to optimize difficult objective functions without computing derivatives. Here we detail the relationship between classical population genetics of quantitative traits and evolutionary ...
Jakub Otwinowski   +2 more
doaj   +1 more source

Enhanced gradient learning for deep neural networks

open access: yesIET Image Processing, 2022
Deep neural networks have achieved great success in both computer vision and natural language processing tasks. How to improve the gradient flows is crucial in training very deep neural networks. To address this challenge, a gradient enhancement approach
Ming Yan   +5 more
doaj   +1 more source

Analytic gradients for natural orbital functional theory [PDF]

open access: yesThe Journal of Chemical Physics, 2017
The analytic energy gradients with respect to nuclear motion are derived for the natural orbital functional (NOF) theory. The resulting equations do not require resorting to linear-response theory, so the computation of NOF energy gradients is analogous to gradient calculations at the Hartree-Fock level of theory.
Ion Mitxelena, Mario Piris
openaire   +3 more sources

Urban-rural gradient detection using multivariate spatial analysis and landscape metrics

open access: yesJournal of Agricultural Engineering, 2013
The gradient approach allows for an innovative representation of landscape composition and configuration not presupposing spatial discontinuities typical of the conventional methods of analysis.
Marco Vizzari, Maurizia Sigura
doaj   +1 more source

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