
190 Glowworm Swarm Optimization: A Tutorial
A few observations are made to provide an insight into situations when a
glowworm becomes leaderless. Note from Table 14.2 that the glowworm G
45
has no leaders at iteration i = 150. This can be attributed to the fact that
its adaptive range r
d
(45, 150) is zero, and hence it has zero neighbors. In
order to find out why the range became zero, the previous state of G
45
was
analyzed. Note that the glowworm has a larger number of neighbors than
the desired number of neighbors (29 » n
t
= 5) at iteration i = 149 within
an adaptive range r
d
(45, 149) of 0.4 units. This causes the range update rule
(14.5) to shrink the ...