<s>
Bidirectional	B-Algorithm
associative	I-Algorithm
memory	I-Algorithm
(	O
BAM	O
)	O
is	O
a	O
type	O
of	O
recurrent	B-Algorithm
neural	I-Algorithm
network	I-Algorithm
.	O
</s>
<s>
There	O
are	O
two	O
types	O
of	O
associative	O
memory	O
,	O
auto-associative	B-Algorithm
and	O
hetero-associative	O
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
the	O
Hopfield	B-Algorithm
network	I-Algorithm
in	O
that	O
they	O
are	O
both	O
forms	O
of	O
associative	O
memory	O
.	O
</s>
<s>
However	O
,	O
Hopfield	B-Algorithm
nets	I-Algorithm
return	O
patterns	O
of	O
the	O
same	O
size	O
.	O
</s>
<s>
The	O
Energy	O
Function	O
proposed	O
by	O
Kosko	O
is	O
for	O
the	O
bidirectional	O
case	O
,	O
which	O
for	O
a	O
particular	O
case	O
corresponds	O
to	O
Hopfield	O
's	O
Auto-associative	B-Algorithm
Energy	O
Function	O
.	O
</s>
