Results 31 to 40 of about 544,634 (294)

Interval-Valued Optimization Problems Involving α,ρ-Right Upper-Dini-Derivative Functions

open access: yesThe Scientific World Journal, 2014
We consider an interval-valued multiobjective problem. Some necessary and sufficient optimality conditions for weak efficient solutions are established under new generalized convexities with the tool-right upper-Dini-derivative, which is an extension of ...
Vasile Preda
doaj   +1 more source

Non-homogeneous directional equations: Slice solutions belonging to functions of bounded $L$-index in the unit ball [PDF]

open access: yesMathematica Bohemica
For a given direction $ b\in\mathbb{C}^n\setminus\{0\}$ we study non-homogeneous directional linear higher-order equations whose all coefficients belong to a class of joint continuous functions which are holomorphic on intersection of all directional ...
Andriy Bandura   +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

Corner detection and classification using anisotropic directional derivative representations

open access: yes, 2013
This paper proposes a corner detector and classifier using anisotropic directional derivative (ANDD) representations. The ANDD representation at a pixel is a function of the oriented angle and characterizes the local directional grayscale variation ...
Shui, PL, Zhang, WC
core   +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

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

Fractional variational problems with the Riesz-Caputo derivative [PDF]

open access: yes, 2012
In this paper we investigate optimality conditions for fractional variational problems, with a Lagrangian depending on the Riesz-Caputo derivative. First we prove a generalized Euler-Lagrange equation for the case when the interval of integration of the ...
Almeida, R.   +2 more
core   +1 more source

Directional Derivatives of Oblique Reflection Maps [PDF]

open access: yesMathematics of Operations Research, 2010
Given an oblique reflection map Γ and functions [Formula: see text] (the space of ℝK-valued functions that have finite left and right limits at every point), the directional derivative [Formula: see text] of Γ along χ, evaluated at ψ, is defined to be the pointwise limit, as [Formula: see text], of the family of functions [Formula: see text ...
Avi Mandelbaum, Kavita Ramanan
openaire   +2 more sources

Regularity Criterion for Weak Solution to the 3D Micropolar Fluid Equations

open access: yesJournal of Applied Mathematics, 2011
Regularity criterion for the 3D micropolar fluid equations is investigated.
Yu-Zhu Wang, Zigao Chen
doaj   +1 more source

Two approximation methods of spatial derivatives on unstructured triangular meshes and their application in computing two dimensional flows

open access: yesVietnam Journal of Mechanics, 2006
Two approximation methods (the Green's theorem technique and the directional derivative technique) of spatial derivatives have been proposed for finite differences on unstructured triangular meshes. Both methods have the first order accuracy.
Nguyen Duc Lang, Tran Gia Lich, Le Duc
doaj   +1 more source

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