Results 51 to 60 of about 3,108 (166)
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 +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 +4 more
wiley +1 more source
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 +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 +2 more
wiley +1 more source
Riemann solitons on Egorov and Cahen-Wallach symmetric spaces
AIMS MathematicsIn 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 +2 more
doaj +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
On the equivalence of linear sets
, 2015 Let $L$ be a linear set of pseudoregulus type in a line $\ell$ in $\Sigma^*=\mathrm{PG}(t-1,q^t)$, $t=5$ or $t>6$. We provide examples of $q$-order canonical subgeometries $\Sigma_1,\, \Sigma_2 \subset \Sigma^*$ such that there is a $(t-3)$-space $\Gamma
Csajbók, Bence, Zanella, Corrado
core +1 more source
Advances in Mathematical Physics, Volume 2017, Issue 1, 2017., 2017 The aim of this paper is to give the geometrical/physical interpretation of the conserved quantities corresponding to each Noether symmetry of the geodetic Lagrangian of plane symmetric space‐times. For this purpose, we present a complete list of plane symmetric nonstatic space‐times along with the generators of all Noether symmetries of the geodetic ...
Bismah Jamil +3 more
wiley +1 more source
Collineations of a symmetric 2-covariant tensor: Ricci collineations [PDF]
Journal of Mathematical Physics, 2013 The infinitesimal transformations that leave invariant a two-covariant symmetric tensor are studied. The interest of these symmetry transformations lays in the fact that this class of tensors includes the energy-momentum and Ricci tensors. We find that in most cases the class of infinitesimal generators of these transformations is a finite dimensional ...
openaire +3 more sources
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 +4 more
doaj +1 more source