Results 41 to 50 of about 692,618 (182)

Performance Optimization Design of Diagonal Flow Fan Based on Ensemble of Surrogates Model

open access: yesApplied Sciences, 2022
Due to the advantages of a high total pressure coefficient, large flow coefficient, and high efficiency, the diagonal flow fan is widely used in people’s livelihood and industrial fields.
Shuiqing Zhou   +4 more
doaj   +1 more source

Exact solution for the energy density inside a one-dimensional non-static cavity with an arbitrary initial field state

open access: yes, 2009
We study the exact solution for the energy density of a real massless scalar field in a two-dimensional spacetime, inside a non-static cavity with an arbitrary initial field state, taking into account the Neumann and Dirichlet boundary conditions.
A L C Rego   +13 more
core   +1 more source

Quantum Vacuum Effects in Braneworlds on AdS Bulk

open access: yesUniverse, 2020
We review the results of investigations for brane-induced effects on the local properties of quantum vacuum in background of AdS spacetime. Two geometries are considered: a brane parallel to the AdS boundary and a brane intersecting the AdS boundary. For
Aram A. Saharian
doaj   +1 more source

Spontaneous Nambu-Goldstone Currents Generation Driven by Mismatch

open access: yes, 2006
We review recent progress of understanding and resolving instabilities driven by mismatch between the Fermi surfaces of the pairing quarks in 2-flavor color superconductor.
Huang, Mei
core   +2 more sources

Condition number estimation of preconditioned matrices. [PDF]

open access: yesPLoS ONE, 2015
The present paper introduces a condition number estimation method for preconditioned matrices. The newly developed method provides reasonable results, while the conventional method which is based on the Lanczos connection gives meaningless results.
Noriyuki Kushida
doaj   +1 more source

Constructions of diagonal quartic and sextic surfaces with infinitely many rational points

open access: yes, 2014
In this note we construct several infinite families of diagonal quartic surfaces \begin{equation*} ax^4+by^4+cz^4+dw^4=0, \end{equation*} where $a,b,c,d\in\Z\setminus\{0\}$ with infinitely many rational points and satisfying the condition $abcd\neq ...
Ajai Choudhry   +6 more
core   +1 more source

Ricci-flat and Einstein pseudoriemannian nilmanifolds

open access: yes, 2019
This is partly an expository paper, where the authors' work on pseudoriemannian Einstein metrics on nilpotent Lie groups is reviewed. A new criterion is given for the existence of a diagonal Einstein metric on a nice nilpotent Lie group.
Conti, Diego, Rossi, Federico A.
core   +1 more source

Boundary entropy of integrable perturbed SU (2) k WZNW

open access: yesJournal of High Energy Physics, 2019
We apply the recently developped analytical methods for computing the boundary entropy, or the g-function, in integrable theories with non-diagonal scattering. We consider the particular case of the current-perturbed SU (2) k WZNW model with boundary and
Dinh-Long Vu, Ivan Kostov, Didina Serban
doaj   +1 more source

The Scattering of Electromagnetic Waves from Two-Dimensional Randomly Rough Penetrable Surfaces

open access: yes, 2010
An accurate and efficient numerical simulation approach to electromagnetic wave scattering from two-dimensional, randomly rough, penetrable surfaces is presented. The use of the M\"uller equations and an impedance boundary condition for a two-dimensional
Alexei A. Maradudin   +8 more
core   +2 more sources

On Condition (G-PWP) [PDF]

open access: yesCategories and General Algebraic Structures with Applications, 2016
Laan in (Ph.D Thesis, Tartu. 1999) introduced the principal weak form of Condition $(P)$ as Condition $(PWP)$ and gave some characterization of monoids by this condition of their acts.
Mostafa Arabtash   +2 more
doaj  

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