Results 21 to 30 of about 779 (181)

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

Research on Positioning Method in Underground Complex Environments Based on Fusion of Binocular Vision and IMU

Sensors, 2022
Aiming at the failure of traditional visual slam localization caused by dynamic target interference and weak texture in underground complexes, an effective robot localization scheme was designed in this paper.
Jie Cheng, Yinglian Jin, Zhen Zhai, Xiaolong Liu, Kun Zhou   +4 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

A generalized isogeometric boundary element method for the uncertain analysis of infinite domain two-dimensional acoustic problems

Frontiers in Physics, 2023
The key aim of this paper is to provide a new nth generalized order perturbed isogeometric fast multistage technique of boundary elements to compute the propagation of time harmonics in an infinite region.
Yan Yang, Yan Yang, Ruijin Huo, Ruijin Huo, Xiaohui Yuan, Wenbo Wu   +5 more
doaj   +1 more source

Simulation of Seismic Response of Reinforced Concrete Beam-Column Joints with Nurbs Surface Fitting

Archives of Civil Engineering, 2017
This paper presents an approach based on NURBS (non-uniform rational B-splines) to achieve a seismic response surface (SRS) from a group of points obtained by using an analytical model of RC joints.
Mirhosseini R. Tabatabaei
doaj   +1 more source

Variational Formulations and Isogeometric Analysis of Timoshenko–Ehrenfest Microbeam Using a Reformulated Strain Gradient Elasticity Theory

Crystals, 2022
This paper presents a novel non-classical Timoshenko–Ehrenfest beam model based on a reformulated strain gradient elasticity theory. The strain gradient effect, couple stress effect, and velocity gradient effect for vibration are included in the new ...
Shuohui Yin, Zhibing Xiao, Jingang Liu, Zixu Xia, Shuitao Gu   +4 more
doaj   +1 more source

A surrogate model based on Non-Uniform Rational B-Splines hypersurfaces

Procedia CIRP, 2018
Abstract This study aims at providing an original metamodeling technique based on the Non-Uniform Rational B-Splines (NURBS) formalism. The proposed approach is able to fit general non-convex sets of target points (TPs) by extending the NURBS formalism to the N-dimensional (N-D) case, getting in this way a general NURBS hypersurface.
Audoux, Yohann, Montemurro, Marco, Pailhès, Jérôme   +2 more
openaire   +3 more sources

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

Fitting Terrestrial Laser Scanner Point Clouds with T-Splines: Local Refinement Strategy for Rigid Body Motion

Remote Sensing, 2021
T-splines have recently been introduced to represent objects of arbitrary shapes using a smaller number of control points than the conventional non-uniform rational B-splines (NURBS) or B-spline representatizons in computer-aided design, computer ...
Gaël Kermarrec, Niklas Schild, Jan Hartmann   +2 more
doaj   +1 more source

Sensitivity analysis of non-uniform rational B-splines–based finite element/boundary element coupling in structural-acoustic design

Frontiers in Physics
For the purpose of modeling the acoustic fluid-structure interaction using direct differentiation method and conducting a structural-acoustic sensitivity analysis, a coupling approach based on the finite element method and the fast multipole boundary ...
Yanming Xu, Sen Yang, Sen Yang
doaj   +1 more source