In the figures to be shown, we follow the conventions of EPA
to represent analytic results [6]. That is, when the system is stable,
the analytic results by EPA are represented by solid curves.
If the system is unstable, we show two kinds of curves for the
analytic results: dashed curves and solid curves. Also, simulations
were performed under assumptions A1-A12. The simulation
results are represented by symbols such as circle, triangle
and square. The duration of each simulation run was taken to
be 22,000 frames.