Results 21 to 30 of about 42,523 (304)

AN INCIDENCE CONJECTURE OF BOURGAIN OVER FIELDS OF POSITIVE CHARACTERISTIC

Forum 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

IEEE 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, Dongkai Yang, Yongqing Yu, Feng Wang   +3 more
doaj   +1 more source

Implicit Characterizations of Smooth Incidence Geometries [PDF]

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

Large Incidence-free Sets in Geometries [PDF]

The Electronic Journal of Combinatorics, 2012
Let $\Pi = (P,L,I)$ denote a rank two geometry. In this paper, we are interested in the largest value of $|X||Y|$ where $X \subset P$ and $Y \subset L$ are sets such that $(X \times Y) \cap I = \emptyset$. Let $\alpha(\Pi)$ denote this value. We concentrate on the case where $P$ is the point set of $\mathsf{PG}(n,q)$ and $L$ is the set of $k$-spaces in
De Winter, Stefaan, Schillewaert, Jeroen, Verstraete, Jacques   +2 more
openaire   +2 more sources

Engineering Chemisorption of Fe4 Single‐Molecule Magnets on Gold

Advanced 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, Erik Tancini, Chiara Danieli, Andrea Luigi Sorrentino, Giulia Serrano, Alessandro Lunghi, Luigi Malavolti, Giuseppe Cucinotta, Anne‐Laure Barra, Amélie Juhin, Marie‐Anne Arrio, Weibin Li, Edwige Otero, Philippe Ohresser, Loïc Joly, Jean Paul Kappler, Federico Totti, Philippe Sainctavit, Andrea Caneschi, Roberta Sessoli, Andrea Cornia, Matteo Mannini   +21 more
doaj   +1 more source

Polynomial effective equidistribution

Comptes 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, Mohammadi, Amir, Wang, Zhiren   +2 more
doaj   +1 more source

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

The 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, Liu Jia-qi, Liu Xin, Zhao Xin-ying, Zhang Sheng-jun, Mu Lei, Ai Xia, Wan Guo-bin, Wang Wei-dong, Zhao Ju-yan   +9 more
doaj   +1 more source

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

Aerospace, 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, Xianjun Yu, Dejun Meng, Guangfeng An, Baojie Liu   +4 more
doaj   +1 more source

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

Journal 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

Double Sided Band-pass Frequency Selective Surface Based on Matryoshka Geometry [PDF]

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper describes the development of a double-sided band-pass frequency selective surface based on Matryoshka geometry, preserving features such as miniaturization, multiband operation and stability of polarization and angle of incidence.
Marina de O. Alencar, Alfredo G. Neto, Marcos T. de Melo, Amanda G. Barboza   +3 more
doaj   +1 more source