Results 11 to 20 of about 7,166,002 (313)
Some characterizations of timelike rectifying curves in de sitter 3 space
Cumhuriyet Science Journal, 2020 De Sitter space is a non-flat Lorentzian space form with positive constant curvature which plays an important role in the theory of relativity. In this paper, we define the notions of timelike rectifying curve and timelike conical surface in De Sitter 3 ...
Mahmut Mak
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CONICS IN SEXTIC -SURFACES IN [PDF]
Nagoya Mathematical Journal, 2021 AbstractWe prove that the maximal number of conics in a smooth sextic $K3$ -surface $X\subset \mathbb {P}^4$ is 285, whereas the maximal number of real conics in a real sextic is 261. In both extremal configurations, all conics are irreducible.
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Kinematic analysis of the method increasing the accuracy of treatment of conic surfaces
Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2020 A method for processing high-precision conical surfaces under conditions of free grinding on a lever machine is proposed, which allows adjusting the process parameters taking into account the technological heredity of the workpiece from the point of view
A. S. Kozeruk +4 more
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Simulation of axicon processing area on technological equipment
Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2020 Annotation. An analytical expression is obtained for engineering calculation of the regularities of removing the allowance from the flat surface of the part (a rectangle in the form of a flat glass plate of considerable thickness with holes for axicon ...
A. S. Kozeruk +3 more
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Influence of the radius of the generatrix of flank surface on the geometric parameters of the cutting wedge of the twist drill [PDF]
E3S Web of Conferences, 2023 Drills with various flank surface shapes are widely used to machine holes. Drill teeth have flank surfaces of various shapes, flat, conical and helical.
Pivkin Petr +3 more
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Teichmüller Theory for Conic Surfaces [PDF]
, 2017 In this paper we develop a systematic deformation theory for conic constant curvature metrics on a closed surface when all cone angles are less than $2 $; in particular, we define and study the Teichm ller space $\mathcal{T}^{\mathrm{conic}}_{ ,k}$ of conic constant curvature metrics on a surface of genus $ $ with $k$ conic points. The methods here
Mazzeo, Rafe, Weiss, Hartmut
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The effect of pin shape on microstructure and mechanical properties of HA-Ti surface composites produced by FSP method [PDF]
مواد نوین, 2023 Introduction: Titanium and Hydroxyapatite (HA) are widely used in various industries, especially medicine and implants. The friction stir welding process (FSP) is one of the best methods for the fabrication of Ti/HA surface composites.
Amirhosein Shahbaz +2 more
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GEOMETRIC STUDY ON TRANSFORMATIONS THROUGH SYMETRY IN 3D SPACE
Journal of Industrial Design and Engineering Graphics, 2021 In this paper, we present an analysis of the symmetry of the point and of the line in relation to the most known curved surfaces: cylindrical, conical and spherical.
Mioara Duca, Narcisa Valter, Iulian Duca
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The curvature of the conical intersection seam: An approximate second-order analysis [PDF]
, 2004 We present a method for analyzing the curvature (second derivatives) of the conical intersection hyperline at an optimized critical point. Our method uses the projected Hessians of the degenerate states after elimination of the two branching space ...
Bearpark, M J +3 more
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Geometric triangulations and flips [PDF]
, 2019 We prove that for a given flat surface with conical singularities, any pair of geometric triangulations can be connected by a chain of flips.Comment: 5 ...
Tahar, Guillaume
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