Abstract Medicanes are tropical‐like cyclones that develop in the Mediterranean Sea. Due to their harmful potential, study of medicanes has captured great attention from scientific community. In context a changing climate, future climatological characterization can only be achieved using climate model output. A frequently used method characterize thermal structure is cyclone phase space (CPS) d...

this paper a novel homotopy perturbation method has been presented for forced convection boundary layer problems in a porous medium. Noting the infinite condition, a homotopy form which is similar to the singular perturbation form has been considered. The inner and outer solutions have been achieved and the coincidence of the results has been investigated with a proper matching method. The resu...

in this paper, we consider the inhomogeneous time-fractional nonlinear fisher equation with three known boundary conditions. we first apply a modified homotopy perturbation method for translating the proposed problem to a set of linear problems. then we use the separation variables  method to solve obtained problems. in examples, we illustrate that by right choice of source term in the modified...

in this paper, we investigate a singular perturbation problem including a fourth order o.d.e. with general linear boundary conditions. firstly, we obtain the necessary conditions of solution of o.d.e. by making use of fundamental solution, then by compatibility of these conditions with boundary conditions, we determine that, for given perturbation problem, whether boundary layer is formed or not.

in this paper, we try to use modeling based on singular perturbation theory, in order to control satellite attitude during the wide rolling angle maneuvering through nonlinear h∞ control strategy. differential equations describing dynamics of the satellite are presented first, and by choosing the appropriate dynamic model for actuators and based on the standard singular perturbation model, the ...

According to general relativity theory (GRT), the clock at a position with lower geopotential ticks slower than an identical one higher geopotential. Here, we provide comparison using non-transportable hydrogen and transportable for altitude transmission based on two-way satellite time frequency transfer (TWSTFT) technique. First, set fifth floor another ground floor, their height difference of...