Results 251 to 260 of about 1,209,713 (321)

Multidisciplinary reliability analysis of turbine blade with shape uncertainty by Kriging model and free-form deformation methods

, 2020
This work presents an integrated approach for the multidisciplinary reliability analysis of turbine blades with shape uncertainty, including the metamodel, the free-form deformation, and the Monte Carlo simulation.
Fan Yang, Zhimin Xu
semanticscholar   +1 more source

Optimizing nonimaging free-form optics using free-form deformation

SPIE Proceedings, 2012
The increasing efficiency of high power LEDs has resulted in many new applications in general lighting. To take full advantage of the properties of LEDs, free-form surfaces can be utilized to create compact non imaging optical systems with high efficiencies and high degrees of freedom for optical designers.
Wendel, Simon, Kurz, Julian, Neumann, Cornelius   +2 more
openaire   +2 more sources

NURBS-based free-form deformations

IEEE Computer Graphics and Applications, 1994
Since the advent of computer-based geometric modeling, designers have tried to develop modeling and deformation tools that allow users to emulate the ease with which sculptors work with clay. T.W. Sederberg and S.R. Parry (1986) demonstrated the application of free-form deformations.
H.J. Lamousin, N.N. Waggenspack
openaire   +1 more source

Hardware-accelerated free-form deformation

Proceedings of the ACM SIGGRAPH/EUROGRAPHICS workshop on Graphics hardware, 2000
Hardware-acceleration for geometric deformation is developed in the framework of an extension to the OpenGL specification. The method requires an addition to the front-end of the OpenGL rendering pipeline and an appropriate OpenGL primitive. Our approach is to implement general geometric deformations so the system supports additional layers of ...
Clint Chua, Ulrich Neumann
openaire   +1 more source

Free-form deformation, mesh morphing and reduced-order methods: enablers for efficient aerodynamic shape optimisation

International journal of computational fluid dynamics (Print), 2018
In this work, we provide an integrated pipeline for the model-order reduction of turbulent flows around parametrised geometries in aerodynamics. In particular, free-form deformation is applied for geometry parametrisation, whereas two different reduced ...
Filippo Salmoiraghi, A. Scardigli, H. Telib, G. Rozza   +3 more
semanticscholar   +1 more source

Log-Euclidean free-form deformation

SPIE Proceedings, 2011
The Free-Form Deformation (FFD) algorithm is a widely used method for non-rigid registration. Modifications have previously been proposed to ensure topology preservation and invertibility within this framework. However, in practice, none of these yield the inverse transformation itself, and one loses the parsimonious B-spline parametrisation.
Modat, Marc, Ridgway, Gerard R., Daga, Pankaj, Cardoso, M. J., Hawkes, David J., Ashburner, John, Ourselin, Sébastien   +6 more
openaire   +2 more sources

Aerodynamic Design Optimization of an Axial Flow Compressor Stator Using Parameterized Free-Form Deformation

Journal of Engineering For Gas Turbines and Power, 2019
This paper describes an aerodynamic design optimization of a highly loaded compressor stator blade using parameterized free-form deformation (FFD). The optimization methodology presented utilizes a B-spline-based FFD control volume to map the blade from ...
R. A. Adjei, Wei-zhe Wang, Yingzheng Liu
semanticscholar   +1 more source

Directly Manipulated Free-Form Deformation Image Registration

IEEE Transactions on Image Processing, 2009
Previous contributions to both the research and open source software communities detailed a generalization of a fast scalar field fitting technique for cubic B-splines based on the work originally proposed by Lee . One advantage of our proposed generalized B-spline fitting approach is its immediate application to a class of nonrigid registration ...
Nicholas J, Tustison, Brian B, Avants, James C, Gee   +2 more
openaire   +2 more sources

FPGA-Based Computation of Free-Form Deformations

2002 IEEE International Conference on Field-Programmable Technology, 2002. (FPT). Proceedings., 2003
This paper describes techniques for producing FPGA-based designs that support free-form deformation in medical image processing. The free-form deformation method is based on a B-spline algorithm for modelling three-dimensional deformable objects. Our design includes four optimisations.
null Jun Jiang, W. Luk, D. Rueckert
openaire   +1 more source

Constrained airfoil optimization using the area-preserving free-form deformation

Aircraft Engineering and Aerospace Technology, 2018
Purpose The purpose of this paper is the presentation of a technique to be integrated in a numerical airfoil optimization scheme, for the exact satisfaction of a strict equality cross-sectional area constraint.
Stavros N. Leloudas, Giorgos A. Strofylas, I. Nikolos   +2 more
semanticscholar   +1 more source