Results 11 to 20 of about 1,741 (182)

Review on non uniform rational B-spline (NURBS): concept and optimization [PDF]

Advanced Materials Research, 2014
Link to publisher's homepage at http://www.ttp.net/This paper is to provide literature review of the Non Uniform Rational B-Splines (NURBS) formulation in the curve and surface constructions.
Fazilah, Abdul Aziz, Nur Najmiyah, Jaafar, Munira, Mohd Ali, Nooraizedfiza, Zainon   +3 more
core   +4 more sources

Flexible control and trajectory planning of medical two-arm surgical robot [PDF]

Frontiers in Neurorobotics
This paper introduces the flexible control and trajectory planning medical two-arm surgical robots, and employs effective collision detection methods to ensure the safety and precision during tasks.
Yanchun Xie, Xue Zhao, Yang Jiang, Yao Wu, Hailong Yu   +4 more
doaj   +2 more sources

Isogeometric modeling and vibroacoustic analysis of a symmetrically laminated thin plate coupled with an acoustic cavity [PDF]

Scientific Reports
This study presents vibroacoustic modeling and analysis of symmetrically laminated thin plate-cavity coupled systems. The plate, cavity, and their coupling are characterized by classical plate theory, the Helmholtz equation, and a displacement–pressure ...
Yaqiang Xue, Chunyu Zhang, Daniel L. Tonouewa, Kangkang Shi   +3 more
doaj   +2 more sources

Automatic Segmentation of Abdominal Aortic Aneurysm From Computed Tomography Angiography Using a Patch-Based Dilated UNet Model [PDF]

IEEE Access
Abdominal Aortic Aneurysm (AAA) is still a socially relevant public health challenge, evidenced by an 82.1% increase in associated fatalities from 1990 to 2019 (with 172,427 deaths in 2019 alone).
Merjulah Roby, Juan C. Restrepo, Haehwan Park, Satish C. Muluk, Mark K. Eskandari, Seungik Baek, Ender A. Finol   +6 more
doaj   +2 more sources

Comparative Study on the Interest in Non-Uniform Rational B-Splines Representation versus Polynomial Surface Description in a Freeform Three-Mirror Anastigmat

Photonics
Novel freeform optical design methods can be classified in two categories, depending on whether they focus on the generation of a starting point or the development of new optimization tools.
Clément Freslier, Guillaume Druart, Alice Fontbonne, Thierry Lépine, Christophe Buisset, Tibor Agocs, Arnaud Heliere, Fanny Keller, Jean-Baptiste Volatier, Stéphane Beaussier, Paul Jougla   +10 more
doaj   +2 more sources

Mixed Isogeometric Analysis of the Brinkman Equation

Mathematics, 2023
This study focuses on numerical solution to the Brinkman equation with mixed Dirichlet–Neumann boundary conditions utilizing isogeometric analysis (IGA) based on non-uniform rational B-splines (NURBS) within the Galerkin method framework.
Lahcen El Ouadefli, Omar El Moutea, Abdeslam El Akkad, Ahmed Elkhalfi, Sorin Vlase, Maria Luminița Scutaru   +5 more
doaj   +1 more source

An Isogeometric Analysis Approach to Kinematics of Spatial Rigid Multibody Systems with Imperfect Joints [PDF]

Modeling, Identification and Control, 2020
This paper proposes a novel generic methodology for kinematics of spatial rigid-multibody systems with and without lubricated joints. In this method CAD surface representations in the form of non-uniform rational B-splines (NURBS) are used to address the
Remzija Cerimagic, Lisbeth Fajstrup, Torben Ole Andersen, Per Johansen   +3 more
doaj   +1 more source

Sensitivity analysis of flexoelectric materials surrogate model based on the isogeometric finite element method

Frontiers in Physics, 2022
In this paper proposes a sensitivity analysis method based on a Polynomial Chaos Expansion (PCE) surrogate model for flexoelectric materials. The non-uniform rational B-splines (NURBS) basis functions to discretize the fourth-order partial differential ...
Haozhi Li, Haozhi Li, Haozhi Li, Juan Zhao, Juan Zhao, Juan Zhao, Xiaokun Guo, Xiaokun Guo, Xiaokun Guo, Yu Cheng, Yu Cheng, Yu Cheng, Yanmin Xu, Yanmin Xu, Xiaohui Yuan, Xiaohui Yuan, Xiaohui Yuan   +16 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

Creeping-ray tracing algorithm for arbitrary NURBS surfaces based on adaptive variable step Euler method

Dianzi Jishu Yingyong, 2018
Although the uniform theory of diffraction(UTD) could be theoretically applied to arbitrarily-shaped convex objects modeled by non-uniform rational b-splines(NURBS), one of the great challenges in calculation of the UTD surface diffracted fields is the ...
Cao Tuo, Fu Song, He Siyuan
doaj   +1 more source