نتایج جستجو برای: rueping method

تعداد نتایج: 1630085  

Journal: :international journal of nano dimension 0
h. bakhtiari department of chemistry, azad university, north tehran branch, tehran, iran. q. s. manuchehri naeini department of chemistry, azad university, north tehran branch, tehran, iran. s. haghighi department of chemistry, azad university, north tehran branch, tehran, iran. m. emamzadeh department of chemistry, azad university, north tehran branch, tehran, iran.

the composite powders of barium-magnesium ferrite were prepared using sol-gel auto-combustion and microwave methods. the crystal structure and the shape of nanocomposites have been compared. x-ray diffraction (xrd), scanning electron microscope (sem) and vibrating sample magnetometer (vsm) were used to investigate the structural, morphological and magnetic properties of nanopowder. the formatio...

Journal: :علوم 0
اسماعیل بابلیان esmaeil babolian دانشگاه علیرضا وحیدی ar vahidi دانشگاه خوارزمی

in this paper, we conduct a comparative study between the homotopy perturbation method (hpm) and adomian’s decomposition method (adm) for analytic treatment of nonlinear volterra integral equations, and we show that the hpm with a specific convex homotopy is equivalent to the adm for these type of equations.

Journal: :iranian journal of science and technology (sciences) 2015
s. m. hosseini harat

in this study, a new efficient semi-analytical method is introduced to give approximate solutions of strongly nonlinear oscillators. the proposed method is based on combination of two different methods, the multi-step homotopy analysis method and spectral method, called the multi-step spectral homotopy analysis method (msham). in this method, firstly, we propose a new spectral homotopy analysis...

Journal: :civil engineering infrastructures journal 0
behrooz keshtegar department of civil engineering, faculty of engineering, university of sistan and baluchestan mahmoud miri department of civil engineering, faculty of engineering, university of sistan and baluchestan

the computation of structural failure probability is vital importance in the reliability analysis and may be carried out on the basis of the first-order reliability method using various mathematical iterative approaches such as hasofer-lind and rackwitz-fiessler (hl-rf). this method may not converge in complicated problems and nonlinear limit state functions, which usually shows itself in the f...

Journal: :iranian journal of cognition and education 2014
mehri rahmani ali rahmani

objectives: in present study, we studied the effect of teaching three painting methods (free method, subject selection method and complementary method) on creativity of children with learning disabilities. first, among all disabled students, who refer to bizhani center for learning disabilities in arak city, 60 subjects were randomly selected as statistical sample. thus, the 45 children, divide...

Journal: :بین المللی مهندسی صنایع و مدیریت تولید 0
amir afshin fatahi assistant professor of industrial eng., islamic azad university, parand branch, iran rassoul noorossana professor of industrial eng., iran university of science and technology, iran pershang dokouhaki instructor of industrial eng., islamic azad university, parand branch, iran massoud babkhani assistant professor of industrial eng., iran university of science and technology, iran

there are miscellaneous quality characteristics in healthcare which are interested to be monitored. however, monitoring each characteristic needs a special statistical method. there are some characteristics with very small incidence rates that it’s usually considered not to be necessary to monitoring them, since their incidence rates are so small that p and np charts are not able to monitor the...

Journal: :iranian journal of science and technology (sciences) 2013
m. heydari

the purpose of this study is to implement a new modification of the variational iteration method (h-s-vim), which is a combination of spectral method and variational iteration method for heat transfer problems with high nonlinearity order. the merit of this method is that it does not require the solution of any linear or nonlinear system of equations unlike spectral method. furthermore the prop...

Journal: :iranian journal of mechanical engineering transactions of the isme 0
a. farshidianfar department of mechanical engineering ferdowsi university of mashhad n. nickmehr

the current paper focuses on some analytical techniques to solve the non-linear duffing oscillator with large nonlinearity. four different methods have been applied for solution of the equation of motion; the variational iteration method, he’s parameter expanding method, parameterized perturbation method, and the homotopy perturbation method. the results reveal that approximation obtained by th...

Journal: :computational methods for differential equations 0
murat gubes karamanoglu mehmetbey university yildiray keskin selcuk university galip oturanc selcuk university

reduced diff erental transform method (rdtm), which isone of the useful and eff ective numerical method, is applied to solve nonlinear time-dependent foam drainage equation (fde) with di fferent initial conditions. we compare our method with the famous adomian decomposition and laplace decomposition methods. the obtained resultsdemonstrated that rdtm is a powerful tool for solving nonlinear par...

Journal: :iranian journal of optimization 2009
h. jafari m. saeidy m. arab firoozjaee

in this paper, nonlinear klein-gordon equation with quadratic term is solved by means of an analytic technique, namely the homotopy analysis method (ham).comparisons are made between the adomian decomposition method (adm), the exact solution and homotopy analysis method. the results reveal that the proposed method is very effective and simple.

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