Results 71 to 80 of about 2,308 (107)

Modeling the performance of an agricultural tractor with radial and diagonal tires on a firm soil

Australian Journal of Crop Science
The tractive capacity and, consequently, the operational performance of the agricultural tractor depends on the characteristics of the tires. This study aimed to model the drawbar performance of an agricultural tractor equipped with radial and diagonal ...
B. G. Alves, Thais de Oliveira Corrêa, Rodney Ferreira Couto, J. Delmond, E. D. Reis   +4 more
semanticscholar   +1 more source

DEVELOPMENT OF A RADIAL-DIAGONAL HYDROTURBINE DESIGN FOR EFFICIENT OPERATION AT HIGH HEADS

Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units
The development of a new hydroturbine design aimed at improving energy and operational efficiency for operation at high heads is presented. A comprehensive analysis of the problems typical for traditional high-head hydroturbines, in particular Francis ...
Yevhenii Krupa, R. Demchuk, Mykola Hulevskyi   +2 more
semanticscholar   +1 more source

NUMERICAL SIMULATION OF FLOW IN THE INLET PASSAGE OF A RADIAL-DIAGONAL HYDROTURBINE

Bulletin of the National Technical University "KhPI". Series: Hydraulic machines and hydraulic units
This paper presents the results of a numerical investigation into the hydrodynamic characteristics of the inlet passage of a novel high-head radialdiagonalhydroturbine design.
E. Krupa, R. Demchuk
semanticscholar   +1 more source

Toeplitz operators in Bergman space induced by radial measures

Boletín de la Sociedad Matematica Mexicana
We study radial Carleson–Bergman measures on the unit disk and the corresponding Toeplitz operators acting on the Bergman space. First, we show that such Toeplitz operators are diagonal in the canonical basis, and we compute their eigenvalue sequences ...
E. Maximenko, Carlos G. Pacheco
semanticscholar   +1 more source

Non-Maxwellian electron effects on the macroscopic response of a Hall thruster discharge from an axial–radial kinetic model

Plasma Sources Science & Technology
A 2D axial–radial particle-in-cell (PIC) model of a Hall thruster discharge has been developed to analyze (mainly) the fluid equations satisfied by the azimuthally-averaged slow dynamics of electrons.
A. Marín-Cebrián, E. Bello-Benítez, A. Domínguez-Vázquez, E. Ahedo   +3 more
semanticscholar   +1 more source

Buchdahl bound, photon ring, innermost stable circular orbit, and radial acceleration in Einstein-æther theory

Physical Review D
Spherically symmetric Einstein-{\ae}ther (E{\AE}) theory with a Maxwell-like kinetic term is revisited. We consider a general choice of the metric and the \ae{}ther field, finding that:~(i) there is a gauge freedom allowing one always to use a diagonal ...
Yi-Hsiung Hsu, A. Lasenby, Will Barker, Amel Durakovic, M. Hobson   +4 more
semanticscholar   +1 more source

Non-unit mapped radial moments platform for robust, geometric invariant image watermarking and reversible data hiding

Information Sciences, 2018
In this paper to adapt radial moment based watermarking for reversible cases, we have developed non-unit mapped radial moments. They have been used to extract the image invariant features to produce robust geometric invariant watermarking and reversible ...
Sasan Golabi, M. Helfroush, H. Danyali
semanticscholar   +1 more source

The reproducing kernel of $\mathcal H^2$ and radial eigenfunctions of the hyperbolic Laplacian

Mathematica Scandinavica, 2019
In the paper we characterize the reproducing kernel $\mathcal {K}_{n,h}$ for the Hardy space $\mathcal {H}^2$ of hyperbolic harmonic functions on the unit ball $\mathbb {B}$ in $\mathbb {R}^n$. Specifically we prove that \[ \mathcal {K}_{n,h}(x,y) = \sum
M. Stoll
semanticscholar   +1 more source

A mechanism based on finger-sliding behavior for designing radial menus

International Journal of Industrial Ergonomics, 2019
Human behavior about sliding their fingers on touch screens needs to be understood for the design of radial menus. For this purpose, data about the angles of finger sliding in performing radial pointing to eight predefined directions were collected.
S. Liang, M. Menozzi, Ying-Yin Huang
semanticscholar   +1 more source

Radial effect in stochastic diagonal approximate greatest descent

International Conference on Signal and Image Processing Applications, 2017
H. Tan, K. Lim, H. Harno
semanticscholar   +1 more source