Results 21 to 30 of about 1,609 (163)

A Feedrate Planning Method for the NURBS Curve in CNC Machining Based on the Critical Constraint Curve

Applied Sciences, 2021
The curvature of the NURBS curve varies along its trajectory, therefore, the commonly used feedrate-planning method, which based on the acceleration/deceleration (Acc/Dec) model, is difficult to be directly applied in CNC machining of a NURBS curve.
Peng Guo, Yijie Wu, Guang Yang, Zhebin Shen, Haorong Zhang, Peng Zhang, Fei Lou, Hengbo Li   +7 more
doaj   +1 more source

NURBS or not NURBS?

Comptes Rendus. Mathématique, 2016
The view adopted here is that the largest class of splines which are useful for design is composed of all spaces of geometrically continuous piecewise quasi-Chebyshevian splines that contain constants and possess blossoms. We recently described an iterative construction of all spaces of this class.
openaire   +3 more sources

Inverse Geometric Reconstruction Based on MW-NURBS Curves

Mathematics
Currently, rational curves such as the Non-Uniform Rational B-Spline (NURBS) play a significant role in both shape representation and shape reconstruction.
Musrrat Ali, Deepika Saini, Sanoj Kumar
doaj   +1 more source

Fast Reconstruction Model of the Ship Hull NURBS Surface with Uniform Continuity for Calculating the Hydrostatic Elements

Journal of Marine Science and Engineering, 2023
The fast reconstruction of the ship hull nonuniform rational B-spline (NURBS) surface with uniform continuity is essential for calculating hydrostatic elements such as waterplane area and molded volume in real time.
Kaige Zhu, Guoyou Shi, Jiao Liu, Jiahui Shi   +3 more
doaj   +1 more source

NURBS-Python: An open-source object-oriented NURBS modeling framework in Python

SoftwareX, 2019
We introduce NURBS-Python, an object-oriented, open-source, Pure Python NURBS evaluation library with no external dependencies. The library is capable of evaluating single or multiple NURBS curves and surfaces, provides a customizable visualization ...
Onur Rauf Bingol, Adarsh Krishnamurthy
doaj   +1 more source

An Improved Method for NURBS Free-Form Surface Based on Discrete Stationary Wavelet Transform

IEEE Access, 2020
In order to improve fitting accuracy of free-form surface, an improved method for the currently recognized NURBS free-form surface based on discrete stationary wavelet transform is proposed.
Deming Kong, Xiaoqiang Tian, Dehan Kong, Xiaodan Zhang, Li Yuan   +4 more
doaj   +1 more source

Analysis of the Flow Field from Connection Cones to Monolith Reactors

Energies, 2019
The connection cones between an exhaust pipe and an exhaust after-treatment system (EATS) will affect the flow into the first monolith. In this study, a new streamlined connection cone using non-uniform rational B-splines (NURBS) is applied to optimize ...
Mingfei Mu, Jonas Sjöblom, Henrik Ström, Xinghu Li   +3 more
doaj   +1 more source

An Isogeometric Bézier Finite Element Method for Vibration Optimization of Functionally Graded Plate with Local Refinement

Crystals, 2022
An effective free vibration optimization procedure in combination with the isogeometric approach (IGA), particle swarm optimization (PSO) and an integrated global and local parameterization is presented.
Xing Wei, Dongdong Liu, Shuohui Yin
doaj   +1 more source

Functional models from limited data: A parametric and multimodal approach to anatomy and 3D kinematics of feeding in basking sharks (Cetorhinus maximus)

The Anatomical Record, EarlyView.
Abstract Basking sharks, Cetorhinus maximus (Gunnerus, Brugden [Squalus maximus], Det Kongelige Norske Videnskabers Selskabs Skrifter, 1765, vol. 3, pp. 33–49), feed by gaping their mouths and gill slits, greatly reorienting their cranial skeletons to filter food from water.
Tairan Li, Mike Schindler, Martha Paskin, Venkata A. Surapaneni, Elliott Scott, Sabine Hauert, Nicholas Payne, David E. Cade, Jeremy A. Goldbogen, Frederik H. Mollen, Daniel Baum, Sean Hanna, Mason N. Dean   +12 more
wiley   +1 more source

Methods for 3D evaluation and quantification of gingival recessions and gingival margin changes: Advancements from conventional techniques

Periodontology 2000, EarlyView.
Abstract In an era of increasing life expectancy and growing patient demands towards lifelong natural tooth retention, accurate assessment of gingival recessions is crucial for diagnosing periodontal diseases, planning preventive or restorative interventions, and evaluating their outcomes.
Nikolaos Gkantidis, Konstantinos Dritsas, Mohammed Ghamri, Demetrios Halazonetis, Anton Sculean   +4 more
wiley   +1 more source