### فهرست مطالب

• Volume:11 Issue: 1, 2018
• تاریخ انتشار: 1397/10/04
• تعداد عناوین: 7
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• AR. Haghighi *, N. Aliashrafi, M. Kiyasatfar Pages 1-10
Blood flow is modeled as non-Newtonian micropolar fluid. The non-linear governing equations of continuum and momentum in the cylindrical coordinate are being discretized using a finite difference approach and have been solved iteratively ,through Crank-Nicolson method. The blood velocity distribution, volumetric flow rate and Resistance to blood flow at the stenosis throat are computed for various values of angle of tapering, amplitudes of body acceleration and Hartman number.
Keywords: Stenosed artery, Micropolar fluid, Body acceleration, Magnetic field, Crank- Nicolson method
• R. Nuraei *, M. Ghanbari Pages 11-24
In this work, we propose a simple method for obtaining the algebraic solution of a complex interval linear system where coefficient matrix is a complex matrix and the right-hand-side vector is a complex interval vector. We first use a complex interval version of the Doolittle decomposition method and then we restrict the Doolittle's solution, by complex limiting factors, to achieve a complex interval vector such that satisfies the mentioned system.
Keywords: Complex interval vector, Complex interval linear system, Complex interval Doolittle decomposition method
• E. Shivanian *, M. Aslefallah Pages 25-34
This paper proposes a numerical method to the two-dimensional hyperbolic equations with nonlocal integral conditions. The nonlocal integral equation is of major challenge in the frame work of the numerical solutions of PDEs. The method benefits from collocation radial basis function method, the generalized thin plate splines radial basis functions are used.Therefore, it does not require any struggle to determine shape parameter (In other RBFs, it is time-consuming step).
Keywords: Radial basis function, Hyperbolic equations with purely integral conditions, Kansa method, Finite differences \$theta -\$ method
• M. Maleki Miyane, S. Abbasbandy* Pages 35-42
We present a numerical method for a class of boundary value problems on the unit interval which feature a type of exponential and product nonlinearities. Also, we consider singular case. We construct a kind of spectral collocation method based on shifted Jacobi polynomials to implement this method. A number of specific numerical examples demonstrate the accuracy and the efficiency of the proposed method.
Keywords: Collocation method, shifted Jacobi polynomial, Singular boundary value problem, Exponential nonlinearity, Product nonlinearity
• L. Hooshangian * Pages 43-54
This paper focuses on the fuzzy Volterra integro-differential equation of nth order of the second-kind with nonlinear fuzzy kernel and initial values. The derived integral equations are solvable, the solutions of which are unique under certain conditions. The existence and uniqueness of the solutions are investigated in a theorem and an upper boundary is found for solutions. Comparison of the exact and approximated solutions shows the least error.
Keywords: General n?th order derivative, H-derivative, H-difference, Fuzzy n-th Order Integro-differential Equation, Existence, Uniqueness theorem
• M. Mirzaei, S. Kordrostami *, AR. Amirteimoori , M. G. Chegini Pages 55-62
Trade-off reviews the rate of marginal substitution of inputs and outputs onto the efficient frontier. On the other hand, marginal rates of substitution (MRS) are important quantities for analysts and managers. In this paper, by changing the method of Asmild (2004), an algorithm is found that it can be used to calculate the marginal rate of the free disposal hull (FDH) model.
Keywords: Data Envelopment Analysis (DEA), Free disposal hull (FDH), Marginal rate
• KH. Maleknejad *, Y. Rostami Pages 63-70
‎‎‎In this paper‎, we use the collocation method for to find an approximate solution of the problem by cubic B-spline basis.‎ The proposed method as a basic function led matrix systems, including band matrices and smoothness and capability to handle low calculative costly. ‎The absolute errors in the solution are compared to existing methods to verify the accuracy and convergent nature of proposed ‎method.
Keywords: Ill-posed problems, Fredholm Integral Equations, Cubic B-spline, Collocation, Regularization