نتایج جستجو برای: equations

تعداد نتایج: 238689  

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

generalized resolvent equations; variational inclusions; algorithm; convergence; generalized pseudocontractive mapping

Journal: :iranian journal of science and technology (sciences) 2011
e. hesameddini

dynamically adaptive numerical methods have been developed to find solutions for differential equations. thesubject of wavelet has attracted the interest of many researchers, especially, in finding efficient solutions fordifferential equations. wavelets have the ability to show functions at different levels of resolution. in this paper, a numerical method is proposed for solving the second pain...

Journal: :iranian journal of science and technology (sciences) 2005
c. tunc

sufficient conditions are established under which the zero solution x = 0 of equation (2) isunstable.

Journal: :international journal of industrial mathematics 0
s. dhawan department of mathematics, dr. b. r. ambedkar national institute of technology jalandhar, india. s. kumar department of mathematics, dr. b. r. ambedkar national institute of technology jalandhar, india.

solitons are ubiquitous and exist in almost every area from sky to bottom. for solitons to appear, the relevant equation of motion must be nonlinear. in the present study, we deal with the korteweg-devries (kdv), modi ed korteweg-de vries (mkdv) and regularised longwave (rlw) equations using homotopy perturbation method (hpm). the algorithm makes use of the hpm to determine the initial expansio...

Journal: :تحقیقات مهندسی کشاورزی 0
کوروش قادری دانشجوی دکتری گروه سازه های آبی دانشکده کشاورزی دانشگاه تربیت مدرس جمال محمدولی سامانی دانشیار گروه سازه های آبی دانشکده کشاورزی دانشگاه تربیت مدرس

for non-darcy flow in submerged porous media a one- dimensional mathematical model has been developed. rockfill detention dams are one of these porous media that comprised of relatively homogenous coarse rockfill which can be used to reduce flood discharge and hydrograph peak. in this research the focus was on the rockfill detention dams in submerged condition. the existence of overtopping rock...

Journal: :علوم و تکنولوژی پلیمر 0
مجتبی باقری جاغرق مهدی سلامی کلجاهی محمد نجفی وحید حدادی اصل سید مهدی قافله باشی زرند

in current work a comprehensive mechanism based on intermediate radical termination theory is assumed for raft polymerization of styrene over cumyl dithiobenzoate as raft agent. rate constants for addition (ka) and fragmentation reactions (kf) are set to 6×106 and 5×104 respectively, which lead to an equilibrium constant value of k = ka/kf = 1.2 x 102. moment equations method was used to model ...

Journal: :international journal of mathematical modelling and computations 0
mahmoud paripour department of mathematics, hamedan university of technology, hamedan, 65156-579, iran iran, islamic republic of homa heidari elahe hajilou

in this paper, we study the numerical solution of hybrid fuzzy differential equations by using differential transformation method (dtm). this is powerful method which consider the approximate solution of a nonlinear equation as an infinite series usually converging to the accurate solution. several numerical examples are given and by comparing the numerical results obtained from dtm  and  predi...

Journal: :bulletin of the iranian mathematical society 0
y. yao school of mathematics‎, ‎south china university of technology‎, ‎guangzhou‎, ‎guangdong 510640‎, ‎p‎. ‎r‎. ‎of china. y. yao school of mathematics‎, ‎south china university of technology‎, ‎guangzhou‎, ‎guangdong 510640‎, ‎p‎. ‎r‎. ‎of china.

‎we study the existence of soliton solutions for a class of‎ ‎quasilinear elliptic equation in $mathbb{textbf{r}}^2$ with critical exponential growth‎. ‎this model has been proposed in the self-channeling of a‎ ‎high-power ultra short laser in matter‎.

Journal: :international journal of nonlinear analysis and applications 0
mai nam phong department of mathematical analysis, university of transport and communications, hanoi city, vietnam vu van khuong department of mathematical analysis, university of transport and communications, hanoi city, vietnam

in this paper, we study the boundedness and persistence of the solutions, the global stability of the unique positive equilibrium point and the rate of convergence of a solution that converges to the equilibrium $e=(bar{x}, bar{y})$ of the system of two difference equations of exponential form: begin{equation*} x_{n+1}=dfrac{a+e^{-(bx_n+cy_n)}}{d+bx_n+cy_n}, y_{n+1}=dfrac{a+e^{-(by_n+cx_n)}}{d+...

Journal: :journal of linear and topological algebra (jlta) 0
a nazari department of mathematics, arak university, p.o. box 38156-8-8349, arak, iran. kh sayehvand faculty of mathematical sciences, university of malayer, p. o. box 16846-13114, malayer, iran. m rostami faculty of mathematical sciences, university of malayer, p. o. box 16846-13114, malayer, iran.

in this article we study ste ensen method to solve nonlinear matrix equation x+a^t x^(-1) a=q, when a is a normal matrix. we establish some conditions that generate a sequence of positive de nite matrices which converges to solution of this equation.

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