Results 41 to 50 of about 52,646 (158)

Volumetric Error Compensation Technique for 3D Printers

Procedia Engineering, 2013
AbstractOne of the main disadvantages for the use of 3D printers in final product manufacturing is its lack of precision and poor dimensional accuracy. This paper proposes volumetric error compensation technique based on pattern artifacts. This technique is applied to an Objet 350V 3D printer.
Cajal, C., Santolaria, J., Velazquez, J., Aguado, S., Albajez, J.   +4 more
openaire   +1 more source

Volumetric Calculation of Quantization Error in 3-D Vision Systems

CoRR, 2020
As submitted to IEEE Transactions on Pattern Analysis and Machine Intelligence on 4th September ...
Eleni Bohacek, Andrew J. Coates, David R. Selviah   +2 more
openaire   +2 more sources

Dose calculation errors for volumetric modulated arc therapy plans of various complexity

Acta Oncologica
Background and purpose: Volumetric modulated arc therapy (VMAT) plans often involve small and irregular beam apertures (i.e. high complexity), which can pose challenges for accurate dose calculations.
Emmanouil Terzidis, Fredrik Nordström, Magnus Gustafsson, Anna Karlsson, Julia Götstedt, Anna Bäck   +5 more
doaj   +1 more source

Portable Freehand 3D Breast Ultrasound Using a Dual-Rotary-Encoder 2DoF Tracking Framework

Sensors
Freehand three-dimensional (3D) ultrasound enables cost-effective volumetric breast imaging, but accurate reconstruction requires reliable probe tracking during manual scanning.
Syahid Al Irfan, Oky Dicky Ardiansyah Prima   +1 more
doaj   +1 more source

CenterMask3D: Are Bounding-Box Based Approaches Suitable for Volumetric Instance Segmentation?

e-Journal of Nondestructive Testing
We evaluate CenterMask3D, an anchor-free volumetric instance segmentation method adapted from FCOS3D, for the analysis of industrial Computed Tomography data.
Martin Leipert, Simon Zalber, Andreas Maier   +2 more
doaj   +1 more source

ML-based detection of critical defects in additively manufactured parts via X-ray computed tomography

Materials & Design
Volumetric defects in laser powder bed fused (L-PBF) components can critically affect their fatigue performance. Although X-ray computed tomography (XCT) enables volumetric defect detection, its effectiveness is limited not only by physical resolution ...
Daniel Perghem, Behnam Salehnasab, Stefano Beretta, Shuai Shao, Nima Shamsaei   +4 more
doaj   +1 more source

Advances in Computer Numerical Control Geometric Error Compensation: Integrating AI and On-Machine Technologies for Ultra-Precision Manufacturing

Machines
Geometric inaccuracies in machine configuration and part specifications are a major source of errors in CNC machining. These discrepancies have long affected the quality of manufactured components and continue to be a key research area in academia and ...
Yassmin Seid Ahmed, Fred Lacerda Amorim
doaj   +1 more source

Considerations for the verification of volumetric modulated arc therapy-planned dose distributions

South African Journal of Oncology, 2019
Background: Volumetric modulated arc therapy (VMAT) is the standard of care for many clinical indications, but should only be considered with proper technical support and quality assurance (QA) in place.
Lourens Strauss, William Shaw
doaj   +1 more source

Time-dependent volumetric printing of precision lenses through dynamic laser writing

International Journal of Extreme Manufacturing
The position-dependent feature in current vat photopolymerization-based additive manufacturing leads to challenges in controlling the dimensional accuracy of printed components.
Chengxue Piao, Xiaotong Du, Ya Xu, Suet To, Limin Zhu, Zhiwei Zhu   +5 more
doaj   +1 more source

MPM-Based Computational Mechanics Method for Tendon-Driven Hyperelastic Robots Under Target Deformations

Mathematics
This work introduces an integrated Material Point Method (MPM) framework for optimizing tendon-driven hyperelastic robots under extreme 3D deformations.
Manjia Su, Ying Yin, Ruiwei Liu, Shichao Gu, Yisheng Guan   +4 more
doaj   +1 more source