Results 1 to 10 of about 252,055 (264)

Angular Rolling of the Hollow Flanges of Pipe Joints

open access: yesMetals, 2021
The paper considers a three-stage technology for angular rolling of the pipe workpiece. This technology facilitates the expansion of the range of flange parts available by eliminating a number of drawbacks of the known methods of metal forming.
Pavel Kononov   +3 more
doaj   +1 more source

Surface Approximation by Means of Gaussian Process Latent Variable Models and Line Element Geometry

open access: yesMathematics, 2023
The close relation between spatial kinematics and line geometry has been proven to be fruitful in surface detection and reconstruction. However, methods based on this approach are limited to simple geometric shapes that can be formulated as a linear ...
Ivan De Boi, Carl Henrik Ek, Rudi Penne
doaj   +1 more source

The Architectonics Features of Heterostructures for IR Range Detectors Based on Polycrystalline Layers of Lead Chalcogenides

open access: yesCrystals, 2021
A model is developed for the formation of porous intragranular architectonics of nanostructured polycrystalline layers of lead chalcogenides for photodetectors and IR emitters.
Yuliya Mikhailovna Spivak   +4 more
doaj   +1 more source

Step-By-Step Modeling and Demetallation Experimental Study on the Porous Structure in Zeolites

open access: yesMolecules, 2022
The organization of microporous space in zeolites is discussed. A new step-by-step model is proposed that explains the principles of organizing the hierarchy of microporous space at the stage of assembling zeolites from elements of minimal size: a ...
Pavel Kononov   +4 more
doaj   +1 more source

On the Angular Control of Rotating Lasers by Means of Line Calculus on Hyperboloids

open access: yesSensors, 2023
We propose a new paradigm for modelling and calibrating laser scanners with rotation symmetry, as is the case for lidars or for galvanometric laser systems with one or two rotating mirrors.
Rudi Penne   +2 more
doaj   +1 more source

SnO2-Based Porous Nanomaterials: Sol-Gel Formation and Gas-Sensing Application

open access: yesGels, 2023
Porous nanocomposites using two (tin dioxide–silica dioxide) and three (tin dioxide–indium oxide-silica dioxide)-component systems for gas sensors were created with the sol–gel method.
Irina Kononova   +2 more
doaj   +1 more source

Geometry of two-parametric family of linear line complexes

open access: yesLietuvos Matematikos Rinkinys, 2005
In this article differential geometry of two-parametric family of linear line complexes in the three-dimensional projective space is considered.
Kazimieras Navickis
doaj   +3 more sources

The Plumb-Line Matching Algorithm for UAV Oblique Photographic Photos

open access: yesRemote Sensing, 2023
Building facades has always been a challenge for feature matching in oblique photogrammetry due to weak textures, non-Lambertian objects, severe occlusion, and distortion.
Xinnai Zhang   +4 more
doaj   +1 more source

The GeoModel tool suite for detector description [PDF]

open access: yesEPJ Web of Conferences, 2021
The GeoModel class library for detector description has recently been released as an open-source package and extended with a set of tools to allow much of the detector modeling to be carried out in a lightweight development environment, outside of large ...
Bandieramonte Marilena   +4 more
doaj   +1 more source

Line Geometry and Camera Autocalibration [PDF]

open access: yesJournal of Mathematical Imaging and Vision, 2008
We provide a completely new rigorous matrix formulation of the absolute quadratic complex (AQC), given by the set of lines intersecting the absolute conic. The new results include closed-form expressions for the camera intrinsic parameters in terms of the AQC, an algorithm to obtain the dual absolute quadric from the AQC using straightforward matrix ...
Ronda Prieto, José Ignacio   +2 more
openaire   +3 more sources

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