بررسی ارتعاشات غیرخطی چرخ دنده های درگیر به کمک روش homotopy-perturbation...

Sedimentologic and geochemical evidence from Iran and

south China indicate that environmental changes were

concentrated in the F/F boundary interval. Typical feldspathic

arkose with kaolinite and illite ...

We present the properties of the C parameter as an event shape variable. We calculate the coupling constants in the perturbative and also in the non perturbative part of the QCD theory, using the dispersive as well as the shape function model...

The Adomian method is wiedly used in approximate caculation, its main demerit is very difficult and complex to calculate Adomian,s polynomial. This paper introduces the homotopy perturbation method for overcoming comletely the disadvantage...

In this paper, Chicone s method has been extended for perturbation systems with three parameters. By applying Diliberto s theorem and variational lemma, some conditions for continuation of periodic solutions of a three-parametric autonomous...

In the present paper the linear oscillator in R3 with z =constant

has been considered. The aim is to determine the necessary conditions for

the persistence of periodic solutions under discontinuous perturbations. A new...