Results 51 to 60 of about 737 (201)
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 +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
Blocking sets with flag transitive collineation groups [PDF]
, 1991 Blocking sets with flag transitive collineation ...
Lynn Batten (13081779)
core
Collineation groups of the intersection of two classical unitals [PDF]
, 2001 Kestenband proved in \cite{K1} that there are only seven pairwise non-isomorphic Hermitian intersections in the desarguesian projective plane $\PG(2,\qq)$ of square order $\qq$.
L. Giuzzi, GIUZZI, Luca
core +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
Web application for teaching of axial affinity and perspective collineation [PDF]
, 2013 This work is intended for high school and university students and their teachers who want to learn or improve their knowledge about affine transformations and perspective collineation.
Plichtová, Petra
core
On the system of fixed points of a collineation in noncommutative projective geometry [PDF]
, 2002 Noncommutativity of the ground field has a deep influence on the geometry of projective spaces, as shown, for instance, by the failure of Pappus’ theorem.
DONATI, GIORGIO, Donati, G.
core +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 +4 more
doaj +1 more source
A Co-Point Mapping-Based Approach to Drivable Area Detection for Self-Driving Cars
Engineering, 2018 The randomness and complexity of urban traffic scenes make it a difficult task for self-driving cars to detect drivable areas. Inspired by human driving behaviors, we propose a novel method of drivable area detection for self-driving cars based on fusing
Ziyi Liu, Siyu Yu, Nanning Zheng
doaj +1 more source
Reply to Collins and Altman [PDF]
European Journal of Cardio-Thoracic Surgery, 2012 We are pleased that EuroSCORE II [1] continues to generate interest and are happy to respond to concerns about its development and evaluation [2]. We find very little to disagree with in the points raised by Collins and Altman [3], but are not convinced that their suggested alternative analysis would have resulted in materially different results.
Linda D, Sharples, Samer A M, Nashef
openaire +2 more sources