Abstract and Applied Analysis / 2014 / Article / Fig 1

Research Article

Application of Extended Homotopy Analysis Method to the Two-Degree-of-Freedom Coupled van der Pol-Duffing Oscillator

Figure 1

Comparison of the phase portrait curves of the forth-order approximation with the numerical integration method.
729184.fig.001a
(a)
729184.fig.001b
(b)