نتایج جستجو برای: exact solution

تعداد نتایج: 567534  

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده برق و الکترونیک 1390

there are many approaches for solving variety combinatorial optimization problems (np-compelete) that devided to exact solutions and approximate solutions. exact methods can only be used for very small size instances due to their expontional search space. for real-world problems, we have to employ approximate methods such as evolutionary algorithms (eas) that find a near-optimal solution in a r...

Journal: :journal of solid mechanics 0
s.a mohajerani department of mechanical engineering, science and research branch, islamic azad university, tehran, iran a mohammadzadeh department of mechanical engineering, science and research branch, islamic azad university, tehran, iran m nikkhah bahrami department of mechanical engineering, science and research branch, islamic azad university, tehran, iran

in this paper vibration of ferromagnetic rectangular plates which are subjected to an inclined magnetic field is investigated based on classical plate theory and maxwell equations. levy type solution and finite element method using comsol software are used to obtain the frequency of the plate subjected to different boundary conditions, good agreements is obtained when computed results are compa...

Journal: :computational methods for differential equations 0
ozkan guner dumlupınar university, school of applied sciences, department of management information systems, kutahya-turkey

in this paper, we obtained the 1-soliton solutions of the symmetric regularized long wave (srlw) equation and the (3+1)-dimensional shallow water wave equations. solitary wave ansatz method is used to carry out the integration of the equations and obtain topological soliton solutions the physical parameters in the soliton solutions are obtained as functions of the dependent coefficients. note t...

Journal: :Journal of Physics A: Mathematical and Theoretical 2010

Journal: :iranian journal of science and technology (sciences) 2010
a. mehmood

exact solution for steady two-dimensional flow of an incompressible magma is obtained. themagmatic flow is studied by considering the magma as a second grade fluid. the governing partialdifferential equations are transformed to ordinary differential equations by symmetry transformations. resultsare discussed through graphs to understand the rheology of the flowing magma

2000
Adam T. Kruger John W. Norbury

A new closed-form inflationary solution is given for a hyperbolic interaction potential. The method used to arrive at this solution is outlined as it appears possible to generate additional sets of equations which satisfy the model. In addition a new form of decaying cosmological constant is presented. PACS numbers: 98.80.Hw, 98.80.Bp, 04.60.+n

2008
A J John S D Maharaj

The condition for pressure isotropy is reduced to a recurrence equation with variable, rational coefficients of order three. We prove that this difference equation can be solved in general. Consequently we can find an exact solution to the field equations corresponding to a static spherically symmetric gravitational potential in terms of elementary functions. The metric functions, the energy de...

Journal: :International Journal for Numerical and Analytical Methods in Geomechanics 2012

Journal: :iranian journal of numerical analysis and optimization 0
mehran namjoo h. atighi lorestani

r. ewing, o. liev, r. lazarov and a. naumovich in [1] proposed a finite volume discretization for one dimensional biot poroelasticity system in multilayer domains. their discretization and exact solution are invalid. we derive valid discretization and exact solution. finally, our numerical solution is compared with known exact solution in discrete l2 norm.

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