نتایج جستجو برای: geometrical effects

تعداد نتایج: 1570013  

1998
Robert de Mello Koch Kyungho Oh Radu Tatar

We show that a system of parallel D3 branes near a conifold singularity can be mapped onto an intersecting configuration of orthogonal branes in type IIA string theory. Using this brane configuration, we analyze the Higgs moduli space of the associated field theory. The dimension of the Higgs moduli space is computed from a geometrical analysis of the conifold singularity. Our results provide e...

ژورنال: مهندسی دریا 2015

Brace and chord members of a tubular joint always have a degree of geometrical imperfection due to the manufacturing, transportation and installation processes and also the action of various loads during the lifetime of the structure. However, during the analysis and design of tubular joints, geometrical imperfection is not usually taken into account. Considering the geometrical imperfection in...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2016
samira mohammadi fatolah farhadi

a brass vortex tube (vt) with interchangeable parts is used to determine the optimum cold end orifice diameter, main tube length and diameter. experiments were carried out to study the effects of operating pressure as well. it is shown that there is an optimum value for cold end orifice diameter, which is equal to 4mm and there is an optimum value for cold and hot exit temperature difference at...

The process of developing architectural forms has greatly been changed by advances in digital technology, especially in design tools and applications. In recent years, the advent of graphical scripting languages in the design process has profoundly affected 3D modeling. Scripting languages help develop algorithms and geometrical grammar of shapes based on their constituent parameters. This stud...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2014
m. shariati a. m. majd sabeti h. gharooni

existence of cracks in industrial structures is one of the important causes of their failure, especially when they are subjected to important axial compressive forces that might lead to buckling. therefore, it must be considered in stress analysis and designing and loading of such structures. in this paper, the buckling and post-buckling behaviors of stainless-steel cracked plates under axial c...

In the design of high Quality factor (Q) micro or nano beam resonators, different dissipation mechanisms may have damaging effects on the quality factor. One of the major dissipation mechanisms is the thermoelastic damping (TED) that needs an accurate consideration for prediction. In this paper, thermoelastic damping of the longitudinal vibration of a homogeneous micro beam with both ends clamp...

Journal: :Journal of theoretical biology 2006
D Waxman

Fisher's geometrical model of evolutionary adaptation has recently been used in a variety of contexts of interest to evolutionary biologists. The renewed interest in this model strongly motivates generalizations that make it a more realistic description of evolutionary adaptation. Previously, the distribution of mutant effects has, for analytical tractability, rather than biological realism, be...

ژورنال: مواد پرانرژی 2011
آدمی, امیرحسین, حیدری, محمد رضا,

  Abstract   In this paper, general grains of solid propulsion systems such as cylindrical grains, multilateral grains and star grains are designed by new method. This method is more rapid in comparison with the others that act base on geometrical breakdown and boundary condition definition. In this method, geometrical definition point and grain production are defined and then the burning surfa...

2017
M. Bitbol D. Quemada

2014 The concentration distribution of a dilute suspension of neutrally buoyant rigid spheres is investigated theoretically, in the entry flow of a circular tube. The geometrical effects (interaction between the tube mouth and the particles) are discussed. The convective motion of the particles in a boundary layer flow through the tube (Re ~ 1) is analysed. The effect of an additional inertia-i...

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