Results 61 to 70 of about 737,384 (277)
Construction of hybrid 1D‐0D networks for efficient and accurate blood flow simulations
International Journal for Numerical Methods in Fluids, Volume 95, Issue 2, Page 262-312, February 2023., 2023 A set of coupling equations to appropriately couple nonlinear 1D and lumped‐parameter (0D) models for blood flow in compliant vessels is defined. Then, a methodology for the high‐order numerical coupling between 1D and 0D vessels through hybrid junctions is proposed.
Beatrice Ghitti +3 more
wiley +1 more source
Birkhoff's Theorem from a geometric perspective: A simple example [PDF]
Categories and General Algebraic Structures with Applications, 2016 From Hilbert's theorem of zeroes, and from Noether's ideal theory, Birkhoff derived certain algebraic concepts (as explained by Tholen) that have a dual significance in general toposes, similar to their role in the original examples of algebraic ...
F. William Lawvere
doaj
Regression with an imputed dependent variable
Journal of Applied Econometrics, Volume 37, Issue 7, Page 1277-1294, November/December 2022., 2022 Summary Researchers are often interested in the relationship between two variables, with no single data set containing both. A common strategy is to use proxies for the dependent variable that are common to two surveys to impute the dependent variable into the data set containing the independent variable.
Thomas F. Crossley +2 more
wiley +1 more source
Analytical Approach for Orbital Evasion with Space Geometry Considered
International Journal of Aerospace Engineering, 2017 This paper researches an optimal problem of orbital evasion with considering space geometry by using an analytical approach. Firstly, an angles-only relative navigation model is built and the definition of completely nonobservable maneuver is proposed ...
Dateng Yu +3 more
doaj +1 more source
BEBAN KOGNITIF SISWA DALAM PEMBELAJARAN MATERI GEOMETRI
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan, 2016 The purpose of the study describes the rises of cognitive load of students in learning geometry. The study used a qualitative approach. The results showed that the intrinsic cognitive load is derived from the number of elements of interactivity of ...
Barep Yohanes +2 more
doaj +1 more source
Automated handling of complex chemical structures in Z‐matrix coordinates—The chemcoord library
Journal of Computational Chemistry, Volume 44, Issue 5, Page 710-726, February 15, 2023., 2023 We propose an algorithm for a chemically intuitive automatically generated Z‐matrix representation, including reliable back‐and‐forth transformation between coordinate spaces while properly handling linear dependencies. The usefulness of the method is showcased for molecule manipulation and initial guesses of reaction pathways.
Oskar Weser +2 more
wiley +1 more source
The Atiyah class on algebraic stacks
Forum of Mathematics, SigmaWe generalize Illusie’s definition of the Atiyah class to complexes with quasi-coherent cohomology on arbitrary algebraic stacks. We show that this gives a global obstruction theory for moduli stacks of complexes in algebraic geometry without derived ...
Nikolas Kuhn
doaj +1 more source
Universe, 2017 In this article, as a new mathematical approach to origin of the laws of nature, using a new basic algebraic axiomatic (matrix) formalism based on the ring theory and Clifford algebras (presented in Section 2), “it is shown that certain mathematical ...
Ramin Zahedi
doaj +1 more source
Analysis of Cone-Beam Artifacts in off-Centered Circular CT for Four Reconstruction Methods
International Journal of Biomedical Imaging, 2006 Cone-beam (CB) acquisition is increasingly used for truly three-dimensional X-ray computerized tomography (CT). However, tomographic reconstruction from data collected along a circular trajectory with the popular Feldkamp algorithm is known to produce ...
S. Valton +2 more
doaj +1 more source