Results 41 to 50 of about 2,675 (232)

On Quasi‐Hermitian Varieties in Even Characteristic and Related Orthogonal Arrays

Journal of Combinatorial Designs, Volume 33, Issue 3, Page 109-122, March 2025.
ABSTRACT In this article, we study the BM quasi‐Hermitian varieties, laying in the three‐dimensional Desarguesian projective space of even order. After a brief investigation of their combinatorial properties, we first show that all of these varieties are projectively equivalent, exhibiting a behavior which is strikingly different from what happens in ...
Angela Aguglia, Luca Giuzzi, Alessandro Montinaro, Viola Siconolfi   +3 more
wiley   +1 more source

Hills thought to be mountains: A geobiocultural characterization of island highlands in Canada's continental plain

Canadian Geographies / Géographies canadiennes, Volume 69, Issue 1, Spring / printemps 2025.
Abstract North America is characterized by an expansive continental plain that has been described as platter‐flat. Yet this central continental plain includes isolated uplands that some people call mountains. The hill‐mountain muddle is a classic problem of geomorphology, arising from the challenge of discriminating continuous, attached forms.
Murray M. Humphries, A. Kirsten Bowser, Jiaao Guo, Allyson K. Menzies   +3 more
wiley   +1 more source

Intensity gradient based edge detection for pixelated communication systems

The Journal of Engineering, Volume 2019, Issue 12, Page 8463-8470, December 2019., 2019
Pixelated optical communication systems transmit data using a series of encoded pixelated images. The decoding of these pixelated images is important for reliable data communication. This study proposes a novel intensity gradient‐based edge detection (IGED) method for the received pixelated images.
Md Ahasan Kabir, Md Rubaiyat Hossain Mondal   +1 more
wiley   +1 more source

2‐Conformal Vector Fields on the Model Sol Space and Hyperbolic Ricci Solitons

Journal of Mathematics, Volume 2025, Issue 1, 2025.
In this study, we present the notion of 2‐conformal vector fields on Riemannian and semi‐Riemannian manifolds, which are an extension of Killing and conformal vector fields. Next, we provide suitable vector fields in Sol space that are 2‐conformal. A few implications of 2‐conformal vector fields in hyperbolic Ricci solitons are investigated.
Rawan Bossly, Ghodratallah Fasihi-Ramandi, Mohd Danish Siddiqi, Antonio Masiello   +3 more
wiley   +1 more source

A Theoretical Investigation of Channel Wave Multipath Propagation in a Coal Seam

Mathematical Problems in Engineering, Volume 2019, Issue 1, 2019., 2019
This study investigates the mechanism of channel wave multipath propagation to determine features of a channel wave in a coal seam. For this purpose, deduction formulas were used for different time delays and propagation paths and, subsequently, a multipath fading channel wave pattern was built. MATLAB software was used to simulate the model.
Yinjing Guo, Jianhua Zhang, Yuanyuan Ju, Xiaohan Guo, Gareth A. Vio   +4 more
wiley   +1 more source

Incremental Localization Algorithm Based on Regularized Iteratively Reweighted Least Square

Foundations of Computing and Decision Sciences, 2016
Incremental localization algorithm is a distributed localization method with excellent characteristics for wireless network. However, its estimated result is generally influenced by the heteroscedasticity arising from cumulative errors and the ...
Yan Xiaoyong, Yang Zhong, Liu Yu, Xu Xiaoduo, Li Huijun   +4 more
doaj   +1 more source

Assessing multi‐sensor hourly maize evapotranspiration estimation using a one‐source surface energy balance approach

Irrigation and Drainage, Volume 73, Issue 3, Page 988-1009, July 2024.
Abstract In this study, the performance of a one‐source surface energy balance (OSEB) remote sensing (RS) of actual crop evapotranspiration (ETa), incorporating data from different spaceborne, airborne and proximal multispectral data, was evaluated. The RS platforms in this study included Landsat‐8 (30 m pixel size), Sentinel‐2 (10 m), Planet CubeSat ...
Edson Costa‐Filho, José L. Chávez, Huihui Zhang   +2 more
wiley   +1 more source

Homotheties of a Class of Spherically Symmetric Space‐Time Admitting G3 as Maximal Isometry Group

Advances in Mathematical Physics, Volume 2018, Issue 1, 2018., 2018
The homotheties of spherically symmetric space‐time admitting G4, G6, and G10 as maximal isometry groups are already known, whereas, for the space‐time admitting G3 as isometry groups, the solution in the form of differential constraints on metric coefficients requires further classification. For a class of spherically symmetric space‐time admitting G3
Daud Ahmad, Kashif Habib, Kaliyaperumal Nakkeeran   +2 more
wiley   +1 more source

Collineation groups of translation planes of small dimension

International Journal of Mathematics and Mathematical Sciences, 1981
A subgroup of the linear translation complement of a translation plane is geometrically irreducible if it has no invariant lines or subplanes. A similar definition can be given for “geometrically primitive”.
T. G. Ostrom
doaj   +1 more source

Riemann solitons on Egorov and Cahen-Wallach symmetric spaces

AIMS Mathematics
In this paper, we consider Egorov and Cahen-Wallach symmetric spaces and study the Riemann solitons on these spaces. We prove that Egorov and Cahen-Wallach symmetric spaces admit the Riemann solitons.
Shahroud Azami, Rawan Bossly, Abdul Haseeb   +2 more
doaj   +1 more source