Results 31 to 40 of about 22,098 (307)

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

Direct Corticospinal Control of Force Derivative [PDF]

open access: yesThe Journal of Neuroscience, 2011
During simultaneous generation of static and dynamic forces, motor cortical signals only predict the dynamic components, suggesting a key role in the coding of force changes. However, such a role is obscured by uncertainties regarding the representation of dynamic force signals in corticospinal outputs.
Oscar, Soto, Didier, Cros
openaire   +2 more sources

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

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

Solutions for Multitime Reaction–Diffusion PDE

open access: yesMathematics, 2022
A previous paper by our research group introduced the nonlinear multitime reaction–diffusion PDE (with oblique derivative) as a generalized version of the single-time model.
Cristian Ghiu, Constantin Udriste
doaj   +1 more source

Integrated Directional Derivative Gradient Operator [PDF]

open access: yesIEEE Transactions on Systems, Man, and Cybernetics, 1987
Accurate edge direction information is required in many image processing applications. A variety of operators for computing local edge direction have been proposed, many of them estimating a kind of gradient. These operators face two major problems. One problem is the inherent bias in their estimate of edge direction.
Oscar A. Zuniga, Robert M. Haralick
openaire   +1 more source

Septin 9 PB domains coordinate centrosome positioning and microtubule acetylation to control epithelial polarity

open access: yesFEBS Letters, EarlyView.
Septin 9 polybasic domains couple phosphoinositide‐rich membrane binding to centrosome positioning, Golgi organization, and microtubule acetylation to control epithelial polarity. Their loss disrupts this axis, causing centrosome mispositioning, Golgi fragmentation, reduced microtubule acetylation, and polarity inversion via upregulation of the ...
Ting ting Cai   +4 more
wiley   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

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