The goal of this work is to build semi-analytical solutions the Rikitake-type system by means optimal homotopy perturbation method (OHPM) using only two iterations. chaotic behaviors are excepted. By taking into consideration geometrical properties system, closed-form can be established. obtained have a periodical behavior. These allow reducing initial second-order nonlinear differential equati...

64 Pharmaceutical Technology SEPTEMBER 2005 Don Chambers, PhD,* is the senior director of analytical development for Schering-Plough Research Institute, 2000 Galloping Hill Road, Kenilworth, NJ 07033, tel. 908.740.2318, fax 908.740.2107, donald. [email protected]. Gregg Kelly, PhD, is a senior principal scientist for Pfizer, Inc. (Groton, CT). Giselle Limentani, PhD, is a director of product ...