The file size is 1.34 MB, Duffing Poincare Model, compute non-linear Duffing equation solutions with the help of this software. Duffing Poincare model computes the solutions to the non-linear Duffing equation, which reads, x'' + 2 x' - x (1 - x2) = f cos( t), where each prime denotes a time derivative. The simulation displays the solution Poincare...