Abstract The partially cut Multiaperture stick propellant is a new concept charging structure. In this paper, in order to accurately obtain the change and development process of two-phase flow field different stages whole interior ballistic propulsion system, coupled calculation model computational established, which converts Euler-Lagrange method Euler-Euler method. Firstly, at initial stage i...

In this work we design new interface transmission conditions for a domain decomposition Schwarz algorithm for the Euler equations in 2 dimensions. These new interface conditions are designed to improve the convergence properties of the Schwarz algorithm. These conditions depend on a few parameters and they generalize the classical ones. Numerical results illustrate the effectiveness of the new ...

a tiling of a surface is a decomposition of the surface into pieces, i.e. tiles, which cover it without gaps or overlaps. in this paper some special polygonal tiling of sphere, ellipsoid, cylinder, and torus as the most abundant shapes of fullerenes are investigated.

In this paper, the author presents the bi-invariant (Haar) integral for the group of rigid-body motions (Euclidean group) in three-dimensional space in terms of finite screw parameters, and proceeds to develop the matrix elements of irreducible unitary representations in this parameterization. This allows one to integrate and expand functions of motion described in terms of screw parameters. In...

Conditions on the stabilization parameters are explored for different approaches in deriving error estimates for the SUPG finite element stabilization of time-dependent convectiondiffusion-reaction equations. Exemplarily, it is shown for the SUPG method combined with the backward Euler scheme that standard energy arguments lead to estimates for stabilization parameters that depend on the length...

This paper studies the nonlinear vibration analysis of a simply supported Euler-Bernoulli beam resting on a nonlinear elastic foundation under compressive axial load using nonlinear normal modes concept in the case of three-to-one (3:1) internal resonance. The beam’s governing nonlinear PDE of motion and also its boundary conditions are derived and then solved using the method of Multiple Time ...

Using 4-dimensional arithmetic hyperbolic manifolds, we construct some new homological quantum error correcting codes. They are LDPC codes with linear rate and distance n. Their rate is evaluated via Euler characteristic arguments and their distance using Z2-systolic geometry. This construction answers a queston of Zémor [Z], who asked whether homological codes with such parameters could exist ...

We study some distributive lattices arising in the combinatorics of lattice paths. In particular, for the Dyck, Motzkin and Schröder lattices we describe the spectrum and we determine explicitly the Euler characteristic in terms of natural parameters of lattice paths. AMS Classification: Primary: 06D05; Secondary: 06A07.

In this paper the solution of an artificial satellite motion under the influence of the Earth’s gravitational field with axial symmetry of any conic section with zonal harmonics J2 in terms of Euler parameters is established. Applications of this method enable anyone to predict the motion of artificial satellites.

Using 4-dimensional arithmetic hyperbolic manifolds, we construct some new homological quantum error correcting codes. They are LDPC codes with linear rate and distance n. Their rate is evaluated via Euler characteristic arguments and their distance using Z2-systolic geometry. This construction answers a queston of Zémor [Z], who asked whether homological codes with such parameters could exist ...