Results 31 to 40 of about 893,805 (272)

Electro-absorption of silicene and bilayer graphene quantum dots [PDF]

open access: yes, 2016
We study numerically the optical properties of low-buckled silicene and AB-stacked bilayer graphene quantum dots subjected to an external electric field, which is normal to their surface.
Abdelsalam, H.   +4 more
core   +2 more sources

Infinite-dimensional triangularization [PDF]

open access: yesJournal of Pure and Applied Algebra, 2018
The goal of this paper is to generalize the theory of triangularizing matrices to linear transformations of an arbitrary vector space, without placing any restrictions on the dimension of the space or on the base field. We define a transformation T of a vector space V to be "triangularizable" if V has a well-ordered basis such that T sends each vector ...
openaire   +2 more sources

Numerical Investigation of Channel Geometry on the Performance of a Pem Fuel Cell

open access: yesInternational Journal of Applied Mechanics and Engineering, 2013
A complete three-dimensional and single phase model for proton exchange membrane (PEM) fuel cells was used to investigate the effect of using different channels geometry on the performances, current density and gas concentration. The proposed model was a
I. Khazaee, M. Mohammadiun
doaj   +1 more source

Abordagem Triangular

open access: yesRevista Gearte, 2017
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Regina Machado
doaj   +3 more sources

Analysis and Estimation of Downward Seepage from Lining and Unlining Triangular Open Channel [PDF]

open access: yesEngineering and Technology Journal, 2016
This research concerns to study the quantity of seepage running downward from triangular open channel with lining and unlining using computer program SEEP/W (which is a sub-program of Geo-Studio). Using SEEP/W experiments two groups were carried out with
Asmaa Abdul Jabbar Jamel
doaj   +1 more source

Upper Triangular Similarity of Upper Triangular Matrices

open access: yesLinear Algebra and its Applications, 1997
The author considers the following equivalence relation in the set of all complex upper triangular \(n\times n\) matrices: \(A\) and \(B\) are \(U\)-similar if there exists an invertible upper triangular matrix \(S\) such that \(A=S^{-1} BS\). If \(A\) and \(B\) are \(U\)-similar, then they must have the same diagonal and the same Jordan form.
openaire   +1 more source

Adaptive triangular cubature

open access: yesRocky Mountain Journal of Mathematics, 1984
This paper contains adaptive cubature rules for bivariate problems over a general polygonal domain D. The domain D is approximated by general triangles. Some numerical examples illustrating the algorithm are given.
Barnhill, R.E., Little, F.F.
openaire   +3 more sources

Comparison of the Influence of Double-Limb Double-Plate Joint on the Stability Bearing Capacity of Triangular and Quadrilateral Transmission Tower Structures

open access: yesBuildings, 2022
The axial stiffness of the connection joints in a transmission tower will affect the stability bearing capacity of the tower. The axial stiffness of different forms of connection joints has different effects on the stability bearing capacities of ...
Tengfei Zhao   +6 more
doaj   +1 more source

On the eigenvalues and eigenvectors of nonsymmetric saddle point matrices preconditioned by block triangular matrices [PDF]

open access: yes, 2013
Block lower triangular and block upper triangular matrices are popular preconditioners for nonsymmetric saddle point matrices. In this note we show that a block lower triangular preconditioner gives the same spectrum as a block upper triangular ...
Pestana, J.
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

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