<s>
ENO	O
(	O
essentially	B-Algorithm
non-oscillatory	I-Algorithm
)	O
methods	O
are	O
classes	O
of	O
high-resolution	B-Algorithm
schemes	I-Algorithm
in	O
numerical	O
solution	O
of	O
differential	O
equations	O
.	O
</s>
<s>
The	O
first	O
ENO	B-Algorithm
scheme	I-Algorithm
was	O
developed	O
by	O
Harten	O
,	O
Engquist	O
,	O
Osher	O
and	O
Chakravarthy	O
in	O
1987	O
.	O
</s>
<s>
In	O
1994	O
,	O
the	O
first	O
weighted	B-Algorithm
version	I-Algorithm
of	O
ENO	O
was	O
developed	O
.	O
</s>
