Results 21 to 30 of about 22,098 (307)

An Accelerated Directional Derivative Method for Smooth Stochastic Convex Optimization

open access: yes, 2020
We consider smooth stochastic convex optimization problems in the context of algorithms which are based on directional derivatives of the objective function.
Dvurechensky, Pavel   +2 more
core   +1 more source

UPPER AND LOWER DIRECTIONAL DERIVATIVE SETS AND DIFFERENTIALS OF THE SET VALUED MAPS

open access: yes, 2022
In this paper directional derivative sets and differentials of a given set valued map are studied. Different type relations between directional derivative sets and differentials of a set valued map are specified.
Ege, N.   +5 more
core   +1 more source

An introduction to non-smooth convex analysis via multiplicative derivative

open access: yesJournal of Taibah University for Science, 2019
In this study, *-directional derivative and *-subgradient are defined using the multiplicative derivative, making a new contribution to non-Newtonian calculus for use in non-smooth analysis.
Ali Hakan Tor
doaj   +1 more source

An accelerated directional derivative method for smooth stochastic convex optimization [PDF]

open access: yes, 2018
We consider smooth stochastic convex optimization problems in the context of algorithms which are based on directional derivatives of the objective function.
Dvurechensky, Pavel   +2 more
core   +1 more source

The Direct Thiation of Pyrimidinol Derivatives.

open access: yesChemical and Pharmaceutical Bulletin, 1963
The replacement of 4-hydroxyl group of aminopyrimidinols by sulfhydryl in one step, through the action of phosphorus pentasulfide in triethylamine or 3-picoline. 5-Acylamino-6-amino-4-pyrimidinols were treated with phosphorus pentasulfide in pyridine, to yield thiazolo [5, 4-d] pyrimidine and 6-purinethiol compounds.
Ueda, Takeo   +2 more
openaire   +3 more sources

Directed Carbozincation Reactions of Cyclopropene Derivatives [PDF]

open access: yesJournal of the American Chemical Society, 2009
A diastereoselective procedure has been developed for the Cu-catalyzed addition of diorganozinc reagents to cyclopropene derivatives. Ester and oxazolidinone functions direct the addition of a variety of organozinc reagents with excellent facial selectivity.
Vinod, Tarwade   +3 more
openaire   +2 more sources

Nonlinear Sherman-type inequalities

open access: yesAdvances in Nonlinear Analysis, 2018
An important class of Schur-convex functions is generated by convex functions via the well-known Hardy–Littlewood–Pólya–Karamata inequality. Sherman’s inequality is a natural generalization of the HLPK inequality.
Niezgoda Marek
doaj   +1 more source

Sensitive Demonstration of the Twin-Core Couplers including Kerr Law Non-Linearity via Beta Derivative Evolution

open access: yesFractal and Fractional, 2022
To obtain new solitary wave solutions for non-linear directional couplers using optical meta-materials, a new extended direct algebraic technique (EDAT) is used. This model investigates solitary wave propagation inside a fiber. As a result, twin couplers
Adeel Asad   +2 more
doaj   +1 more source

Ball-Catching System Using Image Processing and an Omni-Directional Wheeled Mobile Robot

open access: yesSensors, 2021
The ball-catching system examined in this research, which was composed of an omni-directional wheeled mobile robot and an image processing system that included a dynamic stereo vision camera and a static camera, was used to capture a thrown ball.
Sho-Tsung Kao, Ming-Tzu Ho
doaj   +1 more source

Characterizations of Stability of Error Bounds for Convex Inequality Constraint Systems

open access: yesOpen Journal of Mathematical Optimization, 2022
In this paper, we mainly study error bounds for a single convex inequality and semi-infinite convex constraint systems, and give characterizations of stability of error bounds via directional derivatives. For a single convex inequality, it is proved that
Wei, Zhou, Théra, Michel, Yao, Jen-Chih
doaj   +1 more source

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