<s>
The	O
brain	B-Algorithm
storm	I-Algorithm
optimization	I-Algorithm
algorithm	I-Algorithm
is	O
a	O
heuristic	B-Algorithm
algorithm	I-Algorithm
that	O
focuses	O
on	O
solving	O
multi-modal	O
problems	O
,	O
such	O
as	O
radio	O
antennas	O
design	O
worked	O
on	O
by	O
Yahya	O
Rahmat-Samii	O
,	O
inspired	O
by	O
the	O
brainstorming	O
process	O
,	O
proposed	O
by	O
Dr.	O
Yuhui	O
Shi	O
.	O
</s>
<s>
There	O
have	O
also	O
been	O
special	O
issues	O
and	O
special	O
sessions	O
on	O
Brain	B-Algorithm
Storm	I-Algorithm
Optimization	I-Algorithm
algorithm	I-Algorithm
in	O
journals	O
and	O
various	O
conferences	O
,	O
such	O
as	O
Memetic	O
Computing	O
Journal	O
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
variants	O
of	O
the	O
algorithms	O
as	O
well	O
,	O
such	O
as	O
Hypo	O
Variance	O
Brain	B-Algorithm
Storm	I-Algorithm
Optimization	I-Algorithm
,	O
where	O
the	O
object	O
function	O
evaluation	O
is	O
based	O
on	O
the	O
hypo	O
or	O
sub	O
variance	O
rather	O
than	O
Gaussian	O
variance	O
,	O
and	O
Global-best	O
Brain	B-Algorithm
Storm	I-Algorithm
Optimization	I-Algorithm
,	O
where	O
the	O
global-best	O
incorporates	O
a	O
re-initialization	O
scheme	O
that	O
is	O
triggered	O
by	O
the	O
current	O
state	O
of	O
the	O
population	O
,	O
combined	O
with	O
per-variable	O
updates	O
and	O
fitness-based	O
grouping	O
.	O
</s>
<s>
A	O
number	O
of	O
comparison	O
studies	O
are	O
conducted	O
between	O
PSO	B-Algorithm
and	O
BSO	O
.	O
</s>
