Results 31 to 40 of about 94,284 (293)
Multi-patch discontinuous Galerkin isogeometric analysis for wave propagation: explicit time-stepping and efficient mass matrix inversion [PDF]
, 2018 We present a class of spline finite element methods for time-domain wave propagation which are particularly amenable to explicit time-stepping. The proposed methods utilize a discontinuous Galerkin discretization to enforce continuity of the solution ...
Chan, Jesse, Evans, John A
core +3 more sources
Contour Detection of Mammogram Masses Using ChanVese Model and B-Spline Approximation
International Journal of Interactive Multimedia and Artificial Intelligence, 2017 ChanVese model segmentation has been applied for contour detection of mass region in mammogram in our previous work. Available information of the desired object contour is used, in this paper, for B-spline approximation. The mass region boundary (contour)
Youssef Benyoussef +2 more
doaj +1 more source
Journal of Approximation Theory, 2003 Uniqueness and approximation orders of perfect splines are studied in this article. In the main result, upper bounds to the best approximation by perfect splines to continuous functions are provided. Moreover, the approximation results are related to the so-called \(\Sigma\Delta\) modulation of bandlimited univariate signals.
Yingkang Hu, Xiang Ming Yu
openaire +2 more sources
Bivariate segment approximation and splines [PDF]
Advances in Computational Mathematics, 1996 The problem to determine partitions of a given rectangle which are optimal for segment approximation (e.g., by bivariate piecewise polynomials) is investigated. We give criteria for optimal partitions and develop algorithms for computing optimal partitions of certain types.
Nürnberger, Günther +2 more
openaire +4 more sources
Biquadratic Spline Approximations
Publications of the Research Institute for Mathematical Sciences, 1984 We shall consider two kinds of spline approximations over a uniform mesh. The first of them is mid-point spline interpolation and the second is histospline approximation. Our methods don't need any knowledge of derivative values, that is, end conditions are homogeneous ones dealing with function values.
Sakai, Manabu, Usmani, Riaz A.
openaire +2 more sources
Dual generalized B-spline functions and their applications in several approximation problems
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 A new construction method of dual generalized B-spline functions is presented in this paper. Due to the importance of generalized B-splines, several interesting applications of these dual functions in Computer Aided Manufacturing are also given.
Li ZHANG +3 more
doaj +1 more source
APPLICATION OF B-SPLINE METHOD IN SURFACE FITTING PROBLEM [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019 Fitting a smooth surface on irregular data is a problem in many applications of data analysis. Spline polynomials in different orders have been used for interpolation and approximation in one or two-dimensional space in many researches. These polynomials
F. Esmaeili +3 more
doaj +1 more source
SPLINE APPROXIMATION FOR ZADEH'S EXTENSIONS
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems, 2009 In this paper we show an approximation for [Formula: see text], where u is a fuzzy interval and [Formula: see text] is obtained from a continuous function f applying the Zadeh's extension principle. In this process, we used a decomposition for u and the linear spline function for the approximation of f.
Yurilev Chalco-Cano +3 more
openaire +5 more sources
Approximation procedures for data acquisition in testing systems [PDF]
Computer Science Journal of Moldova, 1999 This paper deals with the results of spline approximation functions applied to periodical experimental data and its comparison with polynomial approximation functions.
N. Secrieru
doaj
Comparison of selected splines for stem form modeling: A case study in Norway spruce
Annals of Forest Research, 2014 Natural cubic spline has been frequently used to represent stem forms, with other spline types rarely involved. Splines are a large class of functions and there are many other spline types which might serve that purpose.
Karel Kuželka, Róbert Marušák
doaj +1 more source