نتایج جستجو برای: artificial state equation
تعداد نتایج: 1309158 فیلتر نتایج به سال:
معادلات حالت ، کاربرد وسیعی درتعیین خواص ترمودینامیکی مواد خالص و مخلوط جهت محاسبات فرآیندهای صنایع شیمیایی و به خصوص مواد نفتی دارند. دسته ای ازاین معادلات که دارای سادگی و فرم خاصی در فرمول ریاضی و دقت خوب در پیش بینی خواص ترمودینامیکی هستند، معادلات حالت درجه سه (cubic equation of state) نامیده می شوند. دراین پروژه ابتدا سیر تحول معادلات حالت درجه سه به کمک مقالات منتشر شده بررسی و ارائه شده...
Managing innovation and particularly searching for new ideas in a steady state environment is different than in discontinuous conditions where traditional practices and routines may prove ineffective. This paper reviews and empirically explores the field of search strategies and practices for discontinuous innovation and, for the first time, tests the validity of the "Discontinuous Innovation (...
Equivalence and Differences Between Structural Equation Modeling and State-Space Modeling Techniques
We prove that the solution of the Vlasov-Fokker-Planck equation converges to the unique stationary solution with same mass as time tends to infinity. The same result holds in the repulsive coulombic case for the Vlasov-Poisson-Fokker-Planck system; the newtonian attractive case is also studied. We establish positive and negative answers to the question of existence of a stationary solution for ...
In order to obtain a solution to an optimal control problem, a numerical technique based on state-control parameterization method is presented. This method can be facilitated by the computation of performance index and state equation via approximating the control and state variable as a function of time. Several numerical examples are presented to confirm the analytical findings and illus...
We propose a simple finite difference scheme for Navier–Stokes equations in primitive formulation on curvilinear domains. With proper boundary treatment and interplay between covariant and contravariant components, the spatial discretization admits exact Hodge decomposition and energy identity. As a result, the pressure can be decoupled from the momentum equation with explicit time stepping. No...
This paper deals with the efficient numerical solution of the two–dimensional one– way Helmholtz equation posed on an unbounded domain. In this case one has to introduce artificial boundary conditions to confine the computational domain. The main topic of this work is the construction of so–called discrete transparent boundary conditions for state-of-the-art parabolic equations methods, namely ...
A two-level defect–correction method for the steady-state Navier–Stokes equations with a high Reynolds number is considered in this paper. The defect step is accomplished in a coarse-level subspace Hm by solving the standard Galerkin equation with an artificial viscosity parameter σ as a stability factor, and the correction step is performed in a fine-level subspace HM by solving a linear equat...
One of the basic equations to analyze the detonation of high explosives is the equation of state of the detonation products. Due to the very high pressure of the product, the direct measurement of the thermodynamic variables such as pressure or temperature is not possible. In this research, the parameters of BKW and HOM equations of state of detonation products are determined via experimental m...
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