Results 21 to 30 of about 3,577 (203)

Flow field characteristic of water jet with air ring protective layer under submerged environment and the orthogonal optimization of nozzle structure

Energy Science & Engineering, 2023
A water jet with an air ring protective layer is a promising rock‐breaking and cutting rate improvement method in submerged environment, such as oil–gas drilling. The jet flow field characteristic determines the jet impinge performance and is affected by
Liang Zhang, Qingjie Qi, Tianfang Ma, Lifeng Sun, Yue Wang, Jiamei Chai   +5 more
doaj   +1 more source

Integrating Pedagogical Approaches in the Study of Conic Sections Using Differential Equation and Analysis via Bayesian Inference

Engineering Proceedings, 2023
In science and technology, the application of mathematics and mathematical modelling is crucial. A more conceptual and axiomatic approach has been taken in developing the narrative from geometry in the enormous history of mathematics.
R. Delhibabu, S. Vaithyasubramanian, R. Sundararajan, C. K. Kirubhashankar, K. Vengatakrishnan, Chandu P.M.S.S.   +5 more
doaj   +1 more source

Influence of Die Surface Topography and Lubrication on the Product Quality during Indirect Extrusion of Copper-Clad Aluminum Rods

Metals, 2020
Copper-clad aluminum rods are usually fabricated using hydrostatic extrusion, since during direct and indirect extrusion fracture of the copper sleeve is difficult to avoid.
Stefan Kuhnke, Felix Gensch, René Nitschke, Vidal Sanabria, Soeren Mueller   +4 more
doaj   +1 more source

Optimized bifocal conic section mirrors for single-wavelength sized focusing

, 2023
Compressing all the energy of a laser pulse into a spatiotemporal focal cube edged by the laser center wavelength will realize the highest intensity of an ultra-intense ultrashort laser facility, which is called as the 3 regime or the 3 laser.
Ruxin Li (3978047), Yuxin Leng (641202), Zhaoyang Li (248471), Yanqi Liu (1589689), Xiaoyang Guo (1529899)   +4 more
core   +1 more source

Study of Optical Models Regarding the Human Eye [PDF]

Iranian Journal of Medical Physics, 2011
Introduction: Until now, many models have been presented for optical study of the human eye. In recent years, surgery on the anterior section of the eye (such as cataract and photo-refractive surgery) has increased, so a study on the optics of the eye ...
Maryam Abolmasoomi, Keykhosro Keshavarzi, Mehran Nikkhou, Ebrahim Jafarzadeh Poor   +3 more
doaj   +1 more source

On the conic section fitting problem

, 2006
Adjusted least squares (ALS) estimators for the conic section problem are considered. Consistency of the translation invariant version of ALS estimator is proved. The similarity invariance of the ALS estimator with estimated noise variance is shown.
Kukush, Alexander, Sergiy Shklyar, Van Huffel, S, Shklyar, Sergiy, Alexander Kukush, Markovsky, Ivan, Kukush, A., Ivan Markovsky, Shklyar, S., Markovsky, I., Sabine Van Huffel, Van Huffel, Sabine   +11 more
core   +1 more source

A Unified General Theory of Conic Sections via the Conic Radical

Mathematics
In this paper, we bring forth several new general formulae in the classic study of conics in the Analytic Geometry: the coordinates of all vertices and focal points of arbitrary parabolas, ellipses, and hyperbolas; lengths for all latera recta from any ...
Mauricio Chávez-Pichardo, José Daniel López-Barrientos, Saúl Perea-Flores   +2 more
doaj   +1 more source

Approximation of conic sections by weighted Lupaş post-quantum Bézier curves

Demonstratio Mathematica, 2022
This paper deals with weighted Lupaş post-quantum Bernstein blending functions and Bézier curves constructed with the help of bases via (p,q)\left(p,q)-integers. These blending functions form normalized totally positive bases.
Khan Asif, Iliyas Mohammad, Khan Khalid, Mursaleen Mohammad   +3 more
doaj   +1 more source

ARITHMETIC PROGRESSIONS ON CONIC SECTIONS [PDF]

International Journal of Number Theory, 2013
The set {1, 25, 49} is a 3-term collection of integers which forms an arithmetic progression of perfect squares. We view the set {(1, 1), (5, 25), (7, 49)} as a 3-term collection of rational points on the parabola y = x2whose y-coordinates form an arithmetic progression.
Alvarado, Alejandra, Goins, Edray Herber
openaire   +2 more sources

Learning Trajectory for Pre-Service Mathematics Teachers in Geometry through the Context of Bengkulu Conic-Section Batik Patterns

Inovasi Matematika
The understanding of analytic geometry is often hindered by its abstract presentation and its disconnection from local contexts familiar to students.
Ratnah Lestary, Febri Kristiani, Pika Merliza   +2 more
doaj   +1 more source