Results 81 to 90 of about 693,780 (338)

THE GEOMETRIC ACCURACY VALIDATION OF THE ZY-3 MAPPING SATELLITE [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013
ZiYuan-3 (ZY-3) mapping satellite is the first civilian high-resolution stereo mapping satellite of China. The satellite’s objective is oriented towards plotting 1:50,000 and 1:25,000 topographic maps.
X. Gao, X. Tang, G. Zhang, X. Zhu
doaj   +1 more source

Linear and Geometric Accuracies from Layer Manufacturing

CIRP Annals, 1994
A benchmark component has been designed to test the geometrical capabilities of the photo-polymerisation, selective laser sintering, laminated object manufacturing and fused deposition modelling layer manufacturing rapid prototyping processes. It assesses not only linear accuracies but geometric tolerances, repeatability, resolution limits and the ...
T.H.C. Childs, Neal Juster
openaire   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Nallan’s Direct Ray: An Innovative Gyroscopic-Guided Radiographic Device for Intraoral Radiography

Diagnostics
Background: Intraoral radiography remains highly operator-dependent, with small deviations in beam angulation or receptor placement leading to geometric distortions, diagnostic inaccuracies, and repeated exposures.
Nallan C. S. K. Chaitanya, Nada Tawfig Hashim, Vivek Padmanabhan, Riham Mohammed, Sharifa Jameel Hossain, Sadiah Fathima, Nurain Mohammad Hisham, Neeharika Satya Jyothi Allam, Shishir Ram Shetty, Rajanikanth Yarram, Muhammed Mustahsen Rahman   +10 more
doaj   +1 more source

Accuracy and Surface Quality Improvements in the Manufacturing of Ti-6Al-4V Parts Using Hot Single Point Incremental Forming

Metals, 2019
The present work focuses on the manufacturing of Ti-6Al-4V parts using hot single point incremental forming (SPIF), a non-conventional forming technology mainly oriented toward the fabrication of prototypes, spare parts, or very low volume series. In the
Mikel Ortiz, Mariluz Penalva, Edurne Iriondo, Luis Norberto López de Lacalle   +3 more
doaj   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Increasing 3D Printing Accuracy Through Convolutional Neural Network-Based Compensation for Geometric Deviations

Machines
As Additive Manufacturing (AM) evolves from prototyping to full-scale production, improving geometric accuracy becomes increasingly critical, especially for applications requiring high dimensional fidelity.
Moustapha Jadayel, Farbod Khameneifar
doaj   +1 more source

Patient‐specific geometrical distortion corrections of MRI images improve dosimetric planning accuracy of vestibular schwannoma treated with gamma knife stereotactic radiosurgery [PDF]

, 2023
Mojtaba Safari, Ali Fatemi, Younes Afkham, Louis Archambault   +3 more
openalex   +1 more source

Additive Gaussian Process Regression for Predictive Design of High‐Performance, Printable Silicones

Advanced Engineering Materials, EarlyView.
A chemistry‐aware design framework for tuning printable polydimethylsiloxane (PDMS) for vat photopolymerization (VPP) is developed using additive Gaussian process (GP) modeling. Polymer network mechanics informs variable groupings, feasible formulation constraints, and interaction variables.
Roxana Carbonell, Martha Leach, Hongtao Song, Carolyn Seepersad   +3 more
wiley   +1 more source

Greedy Search for Descriptive Spatial Face Features

, 2017
Facial expression recognition methods use a combination of geometric and appearance-based features. Spatial features are derived from displacements of facial landmarks, and carry geometric information.
Benligiray, Burak, Gacav, Caner, Topal, Cihan   +2 more
core   +1 more source