(a)
(b)
(c)
(d)
Figure 2:
The comparison of
with
: (a) in terms of
, where
, (b) in terms of
, where
, (c) in terms of
, where
and
, and (d) in terms of
, where
and
. The other parameter values and the initial values can be seen in Table
1
, unless we say otherwise.