Results 31 to 40 of about 52,646 (158)

A Step-by-Step Decoupling and Compensation Method for the Volumetric Error for a Gear Grinding Machine

Actuators
Volumetric error decoupling is a critical prerequisite for effective error compensation. In this paper, the forward volumetric error model is established using the screw theory.
Kai Xu, Hao Huang, Rulong Tan, Zhiyu Ding, Xinyuan Wei   +4 more
doaj   +1 more source

Dosimetric effect of rotational setup errors in single-isocenter volumetric-modulated arc therapy of multiple brain metastases

Journal of Medical Physics, 2019
Aim: The aim of this study is to investigate the dosimetric effects of rotational uncertainties in patient positioning on target coverage in stereotactic radiosurgery (SRS) of multiple brain metastases using single isocenter volumetric modulated arc ...
Kasirajan Tamil Selvan, Ganesan Padma, Murugesan Kesavan Revathy, N Arunai Nambi Raj, K Senthilnathan, P Ramesh Babu   +5 more
doaj   +1 more source

Reanalysis of multi-temporal aerial images of Storglaciären, Sweden (1959–99) – Part 2: Comparison of glaciological and volumetric mass balances [PDF]

The Cryosphere, 2010
Seasonal glaciological mass balances have been measured on Storglaciären without interruption since 1945/46. In addition, aerial surveys have been carried out on a decadal basis since the beginning of the observation program.
W. Haeberli, P. Thee, T. Koblet, I. Gärtner-Roer, P. Holmlund, P. Jansson, M. Zemp   +6 more
doaj   +1 more source

Digital Twin for Volumetric Thermal Error Compensation of Large Machine Tools

Sensors
Machine tool accuracy is greatly influenced by geometric and thermal errors that cause positioning deviations within its working volume. Conventionally, these two error sources are treated separately, with distinct procedures employed for their ...
Beñat Iñigo, Natalia Colinas-Armijo, Luis Norberto López de Lacalle, Gorka Aguirre   +3 more
doaj   +1 more source

Volumetric change analysis of the Cauvery delta topography using radar remote sensing

Egyptian Journal of Remote Sensing and Space Sciences, 2022
Geomorphology refers to the study of the Earth’s physical land surface features. Digital Elevation Model (DEM) is a digital imagery where each pixel represents elevation value above or below mean sea level.
Sambandan Rajakumari, Renganathan Mahesh, Kaladevi Jayadevan Sarunjith, Ramachandran Ramesh   +3 more
doaj   +1 more source

Ring artifact and Poisson noise attenuation via volumetric multiscale nonlocal collaborative filtering of spatially correlated noise

Journal of Synchrotron Radiation, 2022
X-ray micro-tomography systems often suffer from high levels of noise. In particular, severe ring artifacts are common in reconstructed images, caused by defects in the detector, calibration errors, and fluctuations producing streak noise in the raw ...
Ymir Mäkinen, Stefano Marchesini, Alessandro Foi   +2 more
doaj   +1 more source

Efficient Method for Identifying Key Errors Based on 21-Geometric-Error Measurement of Three Linear Axes of Machine Tools

Applied Sciences
Key errors of machine tools have a significant impact on their accuracy, however accurately and quickly measuring the geometric errors of machine tools is essential for key error identification.
Fajia Zheng, Bin Zhang, Yuqiong Zhao, Jiakun Li, Fei Long, Qibo Feng   +5 more
doaj   +1 more source

Adequacy of Technical and Commercial Alternatives Applied to Machine Tool Verification Using Laser Tracker

Applied Sciences, 2016
Besides presenting a volumetric verification technique that allows characterization of the different geometric errors of a machine tool (MT) depending on its kinematic chain and geometry through a kinematic model, this paper investigates the influence of
Sergio Aguado, Jorge Santolaria, David Samper, Jesús Velázquez, Carlos Javierre, Ángel Fernández   +5 more
doaj   +1 more source

Joint sensitivity analysis method of impeller aerodynamic performance to key geometric errors of five-axis machine tool

Engineering Science and Technology, an International Journal
As a high-performance workpiece, an impeller must ensure both dimensional accuracy and aerodynamic performance. A five-axis machine tool has various geometric errors, which seriously influence the impeller processing quality, hence it is crucial to ...
Hainan Zhang, Sitong Xiang, Tao Zhou, Jianguo Yang   +3 more
doaj   +1 more source

Thermal Characterization and Predictive Modeling of Thermo-Elastic Errors in Five-Axis Machining Centers Using Dynamic R-Test

Journal of Manufacturing and Materials Processing
Five-axis machining centers are essential for manufacturing complex, high-precision parts. However, their accuracy is significantly affected by thermally induced geometric errors, also known as thermo-elastic errors.
Tae Hun Lee, Tim Klinkhammer, Daniel Zontar, Christian Brecher   +3 more
doaj   +1 more source