Results 21 to 30 of about 41,143 (303)

Quotients of incidence geometries [PDF]

open access: yesDesigns, Codes and Cryptography, 2011
We develop a theory for quotients of geometries and obtain sufficient conditions for the quotient of a geometry to be a geometry. These conditions are compared with earlier work on quotients, in particular by Pasini and Tits. We also explore geometric properties such as connectivity, firmness and transitivity conditions to determine when they are ...
Cara, Philippe   +3 more
openaire   +3 more sources

AN INCIDENCE CONJECTURE OF BOURGAIN OVER FIELDS OF POSITIVE CHARACTERISTIC

open access: yesForum of Mathematics, Sigma, 2016
In this note we generalize a recent theorem of Guth and Katz on incidences between points and lines in 3-space from characteristic 0 to characteristic $p ...
JORDAN S. ELLENBERG, MÁRTON HABLICSEK
doaj   +1 more source

Wind Direction Retrieval Using Spaceborne GNSS-R in Nonspecular Geometry

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
A wind direction retrieval algorithm using spaceborne global navigation satellite system reflectometry (GNSS-R) in nonspecular geometry is presented. This article first focuses on investigating the influence of wind direction on the scattering strength ...
Guodong Zhang   +3 more
doaj   +1 more source

Numerical Investigation of External Electromagnetic Field Coupling to Coplanar Waveguide [PDF]

open access: yesInternational Journal of Industrial Electronics, Control and Optimization, 2020
In this paper, for the first time, effects of external electromagnetic fields on a coplanar waveguide (CPW) are numerically studied by means of the method of finite elements. Two CPW lines with different geometry and dielectric substrate permittivity are
Hamideh Dashti
doaj   +1 more source

Implicit Characterizations of Smooth Incidence Geometries [PDF]

open access: yesGeometriae Dedicata, 2000
Erworben im Rahmen der Schweizer Nationallizenzen (http://www.nationallizenzen.ch)
Bödi, Richard, Immervoll, Stefan
openaire   +2 more sources

Engineering Chemisorption of Fe4 Single‐Molecule Magnets on Gold

open access: yesAdvanced Materials Interfaces, 2021
Gaining control over the grafting geometry is critically important for any application of surface‐supported single‐molecule magnets (SMMs) in data storage, spintronics, and quantum information science.
Lorenzo Poggini   +21 more
doaj   +1 more source

Polynomial effective equidistribution

open access: yesComptes Rendus. Mathématique, 2023
We prove effective equidistribution theorems, with polynomial error rate, for orbits of the unipotent subgroups of $\mathrm{SL}_2(\mathfrak{l})$ in arithmetic quotients of $\mathrm{SL}_2(\mathbb{C})$ and $\mathrm{SL}_2(\mathfrak{l})\times \mathrm{SL}_2 ...
Lindenstrauss, Elon   +2 more
doaj   +1 more source

Theoretical model for the transmittance in a left-handed metamaterial of different geometries [PDF]

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications, 2023
In this work, a theoretical model for the transmittance in a left-handed metamaterial of different geometries is presented. The proposed unit cells are a combination of conducting wires of rectangular cross-section with square-ring and hexagonal ...
Héctor Lorduy G, Ángel Salazar
doaj   +1 more source

Research on influence of special-shaped honeycomb radar absorbing structure for wide-band absorbing design

open access: yesThe Journal of Engineering, 2019
To realise wide-band stealth of radar absorbing material, a special-shaped honeycomb radar absorbing structure within nested cone-shaped scattering configuration is designed.
Wang Ming-liang   +9 more
doaj   +1 more source

A New Approach for Deviation Modeling in Compressors: Sensitivity-Correlated Principal Component Analysis

open access: yesAerospace, 2023
Studies on the geometry variation-related compressor uncertainty quantification (UQ) have often used dimension reduction methods, such as the principal component analysis (PCA), for the modeling of deviations.
Mingzhi Li   +4 more
doaj   +1 more source

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