نتایج جستجو برای: quadrilateral bar

تعداد نتایج: 31750  

1997
Q. P. Liu Manuel Mañas

Sequences of discrete Levy and adjoint Levy transformations for the multidimensional quadrilateral lattices are studied. After a suitable number of iterations we show how all the relevant geometrical features of the transformed quadrilateral lattice can be expressed in terms of multi-Casorati determinants. As an example we dress the Cartesian lattice. On leave of absence from Beijing Graduate S...

Journal: :trauma monthly 0
kazuhiko yamamoto department of oral and maxillofacial surgery, nara medical university, kashihara, japan; department of oral and maxillofacial surgery, nara medical university, 840 shijo-cho, kashihara, nara 634-8522, japan. tel./fax: +81-744298876 yumiko matsusue department of oral and maxillofacial surgery, nara medical university, kashihara, japan satoshi horita department of oral and maxillofacial surgery, nara medical university, kashihara, japan tadaaki kirita department of oral and maxillofacial surgery, nara medical university, kashihara, japan

2011
Martin Josefsson M. Josefsson

We review and prove a total of ten different formulas for the area of a bicentric quadrilateral. Our main result is that this area is given by

Journal: :J. Sci. Comput. 2016
Abhishek Sheshadri Antony Jameson

The flux reconstruction (FR) approach to high-order methods has proved to be a promising alternative to traditional discontinuous Galerkin (DG) schemes since they facilitate the adoption of explicit time-stepping methods suitable for parallel architectures like GPUs. The FR approach provides a parameterized family of schemes through which various classical schemes like nodal-DG and spectral dif...

2010
YUNKYONG HYON DO Y. KWAK

In this paper, we introduce a new family of mixed finite element spaces of higher order (k ≥ 1) on general quadrilateral grids. A typical element has two fewer degrees of freedom than the well-known RaviartThomas finite element RT[k], yet enjoys an optimal-order approximation for the velocity in L 2-norm. The order of approximation in the divergence norm is one less than the velocity, as is com...

2010
Sara Grundel Thomas P.Y. Yu Pencho Petrushev

It is known from a result of Prautzsch and Reif [19] that it is impossible to construct a flexible C2 scheme over extraordinary vertices unless the regular subdivision scheme (assumed in [19] to be based on polynomial splines) is capable of producing polynomial patches of total degree 8 in the triangle case and bi-degree 6 in the quadrilateral case. Prautzsch-Reif’s degree estimate, however, co...

1997
Matthew L. Staten Scott A. Canann

Schneiders and Debye (1995) present two algorithms for quadrilateral mesh refinement. These algorithms refine quadrilateral meshes while maintaining mesh conformity. The first algorithm maintains conformity by introducing triangles. The second algorithm maintains conformity without triangles, but requires a larger degree of refinement. Both algorithms introduce nodes with non-optimal valences. ...

2013
Antonio Carlos de O. Miranda Gilberto Gomes Luiz Fernando Martha

Abstract. This paper describes a quadrilateral mesh generation algorithm ideally suited for transition subdomain meshes in the context of any domain decomposition meshing strategy. The algorithm is based on an automatic hierarchical region decomposition in which, in the last level, it is possible to generate quadrilateral elements with a conventional mapping strategy. In two dimensions, a subdo...

2002
Matthias Müller-Hannemann

Several promising approaches for hexahedral mesh generation work as follows: Given a prescribed quadrilateral surface mesh they first build the combinatorial dual of the hexahedral mesh. This dual mesh is converted into the primal hexahedral mesh, and finally embedded and smoothed into the given domain. Two such approaches, the modified whisker weaving algorithm by Folwell and Mitchell, as well...

Journal: :civil engineering infrastructures journal 0
mohammad rezaiee-pajand professor, civil engineering department, ferdowsi university of mashhad, mashhad, iran majid yaghoobi ph.d. candidate, civil engineering department, ferdowsi university of mashhad, mashhad, iran

in this paper, two new quadrilateral elements are formulated to solve plane problems. low sensitivity to geometric distortion, no parasitic shear error, rotational invariance, and satisfying the felippa pure bending test are characteristics of these suggested elements. one proposed element is formulated by establishing equilibrium equations for the second-order strain field. the other suggested...

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