نتایج جستجو برای: constituent equations
تعداد نتایج: 261774 فیلتر نتایج به سال:
In Part I macroscopic field equations of mass, linear and angular momentum, energy, and the quasistatic form of Maxwell’s equations for a multiphase, multicomponent medium were derived. Here we exploit the entropy inequality to obtain restrictions on constitutive relations at the macroscale for a 2-phase, multiple-constituent, polarizable mixture of fluids and solids. Specific emphasis is place...
We study the mixing angle θOψ and mixing amplitude fOψ of J/ψ and vector glueball O, in the framework of potential models of heavy quarks and constituent gluons. While the state vectors of J/ψ and O are constructed from the wave functions of few-body Schroedinger equations, the mixing dynamics is governed by perturbative QCD.We obtain a value of the mixing angle of | tan θOψ| ≈ 0.015 and the mi...
We present a fast hadronization model for the constituent quark plasma (cqp) produced in relativistic heavy ion collisions at SPS. The model is based on rate equations and on an equation of state inspired by the string phenomenology. This e.o.s. has a confining character. We display the time evolution of the relevant physical quantities during the hadronization process and the final hadron mult...
We implement a three-body confinement force, introduced on an algebraic basis, into a semirelativistic version of the Goldstone-boson-exchange constituent quark model. By solving the Faddeev equations we show that this interaction can increase the gap between singlet and colour states, such as the latter can be ignored and the known baryons can be described as q3 systems. We analyze the effect ...
Relativistic covariance requires that in the constituent quark model for mesons the positive energy states as well as the negative energy states are included. Using relativistic quasi-potential equations the contribution of the negative energy states is studied for the light and charmonium mesons. It is found that these states change the meson mass spectrum significantly but leave its global st...
In this paper an overview of functionally graded materials and constitutive relations of electro elasticity for three-dimensional deformable solids is presented, and governing equations of the Bernoulli–Euler and Timoshenko beam theories which account for through-thickness power-law variation of a two-constituent material and piezoelectric layers are developed using the principle of virtua...
in this paper, the influence of the constituent volume fractions by changing the values of the power-law exponent with uniform pressure on the vibration frequencies of reinforced functionally graded cylindrical shells is studied. the fgm shell with ring is developed in accordance to the volume fraction law from two constituents namely stainless steel and nickel. these constituents are graded th...
This study is limited to study of buckling analysis of a sandwich cylindrical shell with functionally graded face sheets and homogenous core. High-order sandwich plate theory is improved by considering the in-plane stresses of the core that usually are ignored in the analysis of sandwich structures. Assume that all properties of the face sheets and the core are temperature dependent. Strain com...
This paper presents the governing equations and analytical solutions of classical shear deformation theories functionally graded axisymmetric circular plates. The classical, first-order, third-order are presented, accounting for through-thickness variation two-constituent material, modified couple stress effect, von Kármán nonlinearity. Analytical bending linear theories, some which not readily...
The isoscalar twist-two generalized parton distributions (GPDs) of the pion and the kaon are calculated in a Poincaré covariant Bethe-Salpeter constituent quark model. Results are presented for several values of the parameters ξ and t. The results satisfy the form factor constraints and the polynomiality condition. For the pion GPD, also the isospin symmetry constraint is fulfilled. The influen...
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