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I
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s
tate.
T
h
e
s
ec
o
n
d
i
s
ca
lle
d
I
n
-
P
ag
e
B
ac
k
u
p
.
I
n
th
is
ap
p
r
o
ac
h
,
th
e
p
ag
e
w
h
i
ch
co
n
tai
n
s
th
e
m
etad
ata
ass
o
ciate
d
w
it
h
ea
ch
p
ag
e
is
also
s
to
r
ed
in
its
b
ac
k
u
p
ar
ea
.
Du
r
in
g
t
h
e
r
e
s
to
r
e
p
r
o
ce
s
s
,
t
h
e
co
n
tr
o
ller
w
ill
r
eb
u
i
ld
th
e
s
y
s
te
m
s
ta
te
b
y
u
p
d
atin
g
t
h
e
b
ac
k
u
p
ar
ea
o
f
ea
ch
p
ag
e.
Fi
n
all
y
,
H
y
b
r
id
B
ac
k
u
p
i
s
a
m
i
x
t
u
r
e
o
f
t
h
e
ab
o
v
e
t
w
o
tec
h
n
iq
u
es:
i
t
p
er
io
d
icall
y
s
to
r
es
a
b
ac
k
u
p
o
f
th
e
m
ap
p
ed
tab
le
in
th
e
m
e
tad
ata
ar
ea
an
d
it
also
co
p
ies
th
e
m
a
p
in
f
o
r
m
atio
n
in
to
th
e
ar
ea
f
o
r
th
e
co
r
r
esp
o
n
d
in
g
d
ata
p
ag
e.
I
n
f
ac
t,
th
ese
alg
o
r
it
h
m
s
h
e
lp
th
e
s
y
s
te
m
s
r
ed
u
ce
t
h
e
r
is
k
o
f
lo
s
i
n
g
d
ata.
Ho
w
e
v
er
,
th
e
s
e
tech
n
iq
u
es
m
a
y
ca
u
s
e
h
ig
h
co
s
t
s
f
o
r
s
to
r
ag
e
s
y
s
te
m
s
b
ec
au
s
e
t
h
e
y
r
eq
u
ir
e
an
ad
d
itio
n
al
f
las
h
p
r
o
g
r
am
f
o
r
ev
er
y
m
ap
p
in
g
u
p
d
ate.
I
n
ad
d
itio
n
,
th
e
y
ta
k
e
a
lo
n
g
ti
m
e
to
r
ep
r
o
d
u
ce
th
e
m
e
tad
ata
f
r
o
m
th
e
b
ac
k
u
p
ar
ea
,
esp
ec
iall
y
b
ac
k
in
g
u
p
in
t
h
e
p
ag
e.
T
h
is
ar
ticle
p
r
o
v
id
es
a
n
o
v
er
v
ie
w
o
f
t
h
e
tec
h
n
iq
u
e
s
a
n
d
m
e
th
o
d
s
p
r
o
p
o
s
ed
to
s
o
lv
e
t
h
e
p
r
o
b
lem
o
f
r
ec
o
v
er
in
g
d
ata
o
n
f
las
h
m
e
m
o
r
y
i
n
ter
m
s
o
f
p
o
licies.
T
h
e
r
est o
f
t
h
is
p
ap
er
is
s
tr
u
c
tu
r
ed
as f
o
llo
w
s
:
Sectio
n
2
r
ev
ie
w
s
t
h
e
f
u
n
d
a
m
e
n
tal
k
n
o
w
led
g
e
o
f
f
la
s
h
m
e
m
o
r
y
,
FT
L
,
B
-
tr
ee
,
an
d
T*
-
tr
ee
.
Nex
t,
Se
ctio
n
3
is
p
r
esen
ted
by
t
h
e
r
ec
o
v
er
y
tec
h
n
iq
u
e
s
o
f
f
las
h
m
e
m
o
r
y
a
n
d
f
i
n
all
y
,
Sec
tio
n
4
co
n
clu
d
es t
h
e
p
ap
er
.
2.
B
ACK
G
RO
UND
AN
D
RE
L
AT
E
D
WO
RK
2
.
1
.
F
la
s
h
m
e
m
o
ry
Flas
h
m
e
m
o
r
y
[
1
,
2
]
is
a
n
o
n
-
v
o
latile
s
to
r
ag
e
f
o
r
m
at
u
s
ed
to
d
ay
.
Un
li
k
e
tr
ad
itio
n
al
h
ar
d
d
is
k
s
to
r
ag
e,
th
e
f
las
h
m
e
m
o
r
y
co
n
tain
s
a
r
a
n
g
e
o
f
m
e
m
o
r
ies,
co
n
tr
o
ls
,
an
d
S
R
A
Ms
t
h
at
ar
e
u
s
ed
as
in
p
u
t
b
u
f
f
er
s
an
d
s
to
r
e
li
n
k
in
f
o
r
m
at
io
n
.
N
A
N
D
f
las
h
m
e
m
o
r
y
co
n
s
is
t
s
o
f
s
e
v
er
al
b
lo
ck
s
,
ea
c
h
co
n
ta
in
i
n
g
a
n
u
m
b
er
o
f
p
ag
es
(
f
o
r
ex
a
m
p
le,
3
2
,
6
4
,
o
r
1
2
8
)
.
T
h
e
p
ag
e
i
s
t
h
e
s
m
all
est
u
n
i
t
f
o
r
r
ea
d
an
d
w
r
ite
o
p
er
atio
n
s
w
h
ile
t
h
e
b
lo
ck
is
th
e
s
m
al
lest
u
n
it o
f
er
ase
o
p
er
atio
n
s
.
Flas
h
m
e
m
o
r
y
s
u
p
p
o
r
ts
th
r
ee
b
asic
o
p
er
atio
n
s
:
r
ea
d
,
w
r
ite,
an
d
er
ase.
R
ea
d
o
p
er
atio
n
is
th
e
f
a
s
test
o
n
e
a
m
o
n
g
t
h
ese
o
p
er
atio
n
s
,
w
h
ic
h
is
ab
o
u
t 1
0
ti
m
e
s
f
a
s
ter
th
an
a
w
r
ite
o
p
er
atio
n
.
T
h
e
er
ase
o
p
er
atio
n
is
v
er
y
ti
m
e
-
co
n
s
u
m
i
n
g
;
a
p
er
-
b
lo
ck
-
er
ase
-
ti
m
e
u
s
u
all
y
tak
e
s
ab
o
u
t
2
m
s
,
o
v
er
1
0
ti
m
es
s
lo
w
er
t
h
an
a
w
r
it
e
o
p
er
atio
n
.
Flas
h
m
e
m
o
r
y
is
a
h
i
g
h
-
d
e
n
s
it
y
s
to
r
ag
e
d
ev
ice
w
h
ic
h
r
eq
u
ir
e
s
a
n
ad
d
itio
n
a
l
la
y
er
o
f
s
o
f
t
w
ar
e
ca
lled
th
e
F
las
h
T
r
an
s
latio
n
L
a
y
er
(
FT
L
)
[
1
,
2
]
to
co
n
tr
o
l
an
d
m
an
a
g
e
d
ata
to
i
m
p
r
o
v
e
th
e
p
er
f
o
r
m
an
ce
o
f
f
las
h
m
e
m
o
r
y
.
T
h
er
e
ar
e
t
w
o
ty
p
es
o
f
f
la
s
h
m
e
m
o
r
y
:
N
OR
an
d
N
A
ND.
NO
R
f
las
h
m
e
m
o
r
y
is
u
s
ed
in
th
e
i
n
d
u
s
tr
y
.
I
t
p
r
o
v
id
es
a
n
e
as
y
-
to
-
u
s
e
an
d
u
s
er
-
f
r
ien
d
l
y
i
n
ter
f
ac
e
f
o
r
co
d
e
ex
ec
u
tio
n
a
n
d
m
a
k
es
a
g
o
o
d
d
ev
ice
w
it
h
o
u
t
d
ata
s
to
r
ag
e.
Sin
ce
NO
R
f
las
h
m
e
m
o
r
y
p
er
f
o
r
m
an
ce
i
s
g
o
o
d
at
r
ea
d
in
g
,
b
u
t
n
o
t
g
o
o
d
at
er
asin
g
an
d
w
r
iti
n
g
,
it
i
s
u
s
ed
as
a
s
to
r
ag
e
d
ev
ice.
Ho
w
ev
e
r
,
to
d
ay
'
s
d
ev
ic
e
s
ar
e
b
ec
o
m
i
n
g
s
m
a
ller
b
y
d
a
y
,
s
o
th
e
y
ar
e
ex
p
ec
ted
to
o
f
f
er
m
o
r
e
f
ea
tu
r
e
s
,
an
d
m
o
r
e
in
f
o
r
m
atio
n
s
to
r
ag
e.
C
ap
ac
it
y
r
eq
u
ir
e
m
en
ts
ar
e
m
o
r
e
i
m
p
o
r
tan
t
f
ac
to
r
th
an
t
h
e
ab
il
it
y
to
co
d
e
an
d
s
to
r
e
d
ata,
a
n
d
s
ig
n
i
f
ica
n
tl
y
f
a
s
ter
er
ase
ti
m
es.
N
AND
f
la
s
h
m
e
m
o
r
y
p
r
o
v
id
es
all
th
e
ab
o
v
e
f
ea
tu
r
e
s
an
d
af
f
o
r
d
ab
le
p
r
ic
e
in
ca
p
ac
ities
.
Ho
w
ev
er
,
en
g
i
n
ee
r
s
d
o
n
o
t
lik
e
to
u
s
e
it
b
ec
au
s
e
o
f
co
m
p
le
x
m
a
n
ag
e
m
e
n
t
a
n
d
n
o
n
-
s
tan
d
ar
d
in
ter
f
ac
e.
T
h
e
s
tr
u
ct
u
r
e
o
f
N
AN
D
Flas
h
m
e
m
o
r
y
is
s
h
o
w
n
in
F
ig
u
r
e
1
.
Fig
u
r
e
1
.
Stru
ct
u
r
e
o
f
N
A
ND
f
las
h
m
e
m
o
r
y
…
…
A
p
p
l
i
c
a
t
i
o
n
R
e
a
d
&
W
r
i
t
e
Er
a
se
F
l
a
sh
T
r
a
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sl
a
t
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o
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r
S
e
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r
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e
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t
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r
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S
e
c
t
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r
1
S
e
c
t
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r
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S
e
c
t
o
r
1
S
e
c
t
o
r
1
S
e
c
t
o
r
2
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e
c
t
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r
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c
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r
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M
a
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…
…
S
e
c
t
o
r
3
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S
e
c
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o
r
3
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r
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…
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
10
,
No
.
1
,
Feb
r
u
ar
y
2
0
2
0
:
3
6
0
-
376
362
2
.
2
.
F
la
s
h
t
ra
ns
la
t
io
n la
y
er
(
F
T
L
)
T
h
e
Flas
h
T
r
an
s
latio
n
L
a
y
er
(
FT
L
)
is
a
g
o
o
d
en
v
ir
o
n
m
en
t
s
o
f
t
w
ar
e
m
o
d
u
le
f
o
r
s
to
r
in
g
d
ata.
I
t
r
ec
o
r
d
s
,
an
d
m
o
d
if
ie
s
i
n
f
o
r
m
at
io
n
f
r
o
m
a
n
e
m
p
t
y
p
a
g
e
a
n
d
m
o
v
es
th
e
r
eq
u
est
t
o
th
e
n
e
w
ad
d
r
ess
.
FT
L
en
s
u
r
es
t
h
at
th
e
m
o
s
t
r
ec
en
t
r
ec
o
r
d
is
d
is
tr
ib
u
ted
ac
r
o
s
s
all
p
ag
es
th
a
t
ar
e
lik
el
y
to
b
e
p
r
o
ce
s
s
ed
.
I
t
k
ee
p
s
a
lis
t
o
f
i
n
v
alid
p
ag
es,
m
ar
k
er
s
,
d
eletio
n
s
,
an
d
r
eu
s
e.
T
h
e
m
ain
p
u
r
p
o
s
e
o
f
FT
L
is
to
s
i
m
u
late
th
e
f
u
n
ctio
n
o
f
a
tr
ad
itio
n
al
d
ev
ice
b
lo
ck
w
it
h
i
ts
c
h
ar
ac
ter
is
tic
f
la
s
h
m
e
m
o
r
y
clea
r
e
d
b
ef
o
r
e
r
ec
o
r
d
in
g
.
I
t
p
r
o
v
id
es
th
e
p
r
o
ce
s
s
o
f
co
n
v
er
ti
n
g
f
r
o
m
lo
g
ical
ad
d
r
ess
es
to
p
h
y
s
ic
al
ad
d
r
ess
es,
g
ar
b
ag
e
co
llectio
n
,
an
d
w
ea
r
lev
eli
n
g
w
h
e
n
r
eq
u
ested
[
2
2
,
2
3
]
.
N
A
N
D
f
la
s
h
m
e
m
o
r
y
h
a
s
a
lo
g
er
ase
ti
m
e
w
h
en
p
er
f
o
r
m
in
g
a
b
lo
ck
d
elete
o
p
er
atio
n
.
W
ith
FT
L
lo
g
er
as
e
ti
m
e
is
tr
an
s
f
er
r
ed
w
h
en
F
T
L
w
r
ite
s
d
ata
to
a
n
a
v
ailab
l
e
p
h
y
s
ical
p
a
g
e
a
n
d
th
en
m
ar
k
s
t
h
e
d
ata
co
n
tain
in
g
th
e
p
r
ev
io
u
s
p
a
g
e
as i
n
v
al
id
d
ata
r
ath
er
th
a
n
d
eletin
g
t
h
e
en
t
ir
e
b
lo
ck
.
On
e
o
f
th
e
m
a
in
f
u
n
ctio
n
s
o
f
FT
L
is
th
e
ad
d
r
ess
m
ap
p
i
n
g
.
B
asicall
y
,
it
m
ap
s
lo
g
ica
l
ad
d
r
ess
es
f
r
o
m
th
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t
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p
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ical
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d
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ess
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o
f
f
lash
m
e
m
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y
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h
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b
asic
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d
r
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m
ap
p
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alg
o
r
it
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m
s
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m
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ased
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t
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m
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it:
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m
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id
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ap
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Secto
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m
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it
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ased
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y
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m
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a
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s
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lar
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C
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FT
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alg
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ith
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[
1
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A
l
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M
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s
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y
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m
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t
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o
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m
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h
e
n
a
h
o
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t
r
eq
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ests
a
w
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ch
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o
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es
o
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o
f
t
w
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ce
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Firs
t,
i
f
t
h
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i
s
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ata
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t
h
e
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eq
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ested
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ess
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w
r
i
tes
t
h
e
d
ata
d
ir
ec
tl
y
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th
a
t
ad
d
r
ess
.
Oth
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w
i
s
e,
if
th
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e
i
s
t
h
e
d
ata
in
t
h
e
r
eq
u
ir
ed
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d
r
ess
,
FT
L
f
i
n
d
s
t
h
e
ap
p
r
o
p
r
iate
ad
d
r
ess
to
co
m
p
lete
th
e
w
r
ite
o
p
er
atio
n
,
an
d
in
f
o
r
m
at
io
n
c
h
an
g
e
is
s
to
r
ed
else
w
h
er
e
i
n
t
h
e
f
las
h
m
e
m
o
r
y
.
I
f
FT
L
d
o
e
s
n
o
t
s
a
v
e
ch
a
n
g
ed
in
f
o
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m
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n
it
w
il
l
b
e
v
er
y
d
i
f
f
icu
l
t
to
f
in
d
th
e
d
ata
w
h
e
n
th
e
h
o
s
t
w
a
n
ts
to
f
i
n
d
it
later
.
So
F
T
L
w
il
l
s
to
r
e
in
f
o
r
m
atio
n
i
n
f
las
h
m
e
m
o
r
y
.
Fig
u
r
e
2
s
h
o
w
s
t
h
e
s
tr
u
ct
u
r
e
o
f
Fla
s
h
T
r
an
s
latio
n
L
a
y
er
.
Fig
u
r
e
2
.
T
h
e
f
lash
tr
a
n
s
latio
n
la
y
er
s
tr
u
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r
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2
.
3
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B
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t
re
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B
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tr
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[
7
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is
a
tr
ee
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t
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p
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a
s
tr
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ct
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r
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t
h
at
allo
w
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s
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h
in
g
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s
eq
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e
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tial
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s
s
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in
s
e
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tio
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d
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eletio
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in
lo
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it
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B
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h
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w
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en
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Un
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7
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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(
V
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363
its
c
h
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n
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s
c
h
an
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d
.
W
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u
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h
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ar
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th
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m
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th
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B
+
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ee
[
8
]
o
r
B
*
-
tr
ee
.
a.
I
n
th
e
B+
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all
k
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ter
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Fig
u
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Flas
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Fig
u
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.
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y
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te
m
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o
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m
ai
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m
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[
9
]
.
T
h
e
s
tr
u
ct
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r
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f
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i
s
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ize
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[
9
]
.
As
s
h
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w
n
in
Fi
g
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r
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4
,
t
h
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B
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it r
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f
f
i
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ag
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ca
p
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it
y
[
9
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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N
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2
0
8
8
-
8708
I
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t J
E
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&
C
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p
E
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g
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Vo
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10
,
No
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1
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Feb
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376
364
Fig
u
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4
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5
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[
1
0
]
.
T
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as
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ased
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ated
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p
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ated
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’
s
d
ata
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r
s
p
ar
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ar
ea
.
3.
DATA R
E
CO
V
E
RY
T
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CH
NIQU
E
S O
N
F
L
ASH
M
E
M
O
RY
Fig
u
r
e
5
s
h
o
w
s
an
o
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w
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ata
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p
r
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le
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h
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g
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ated
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r
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h
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ith
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lem
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ata
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s
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s
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ee
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etad
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h
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ir
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p
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FT
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n
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Dir
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a
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tech
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iq
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er
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Fig
u
r
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.
Data
r
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y
tec
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3
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1
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d g
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ch
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,
an
d
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T
r
ee
tech
n
iq
u
e
h
av
e
b
ee
n
p
r
o
p
o
s
ed
.
I
n
s
tead
o
f
w
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g
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e
in
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x
u
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it
s
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o
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e
th
e
in
d
ex
u
n
its
i
n
th
e
b
u
f
f
er
.
W
h
en
th
e
b
u
f
f
er
is
f
u
ll,
t
h
e
in
d
ex
u
n
its
ar
e
co
llected
an
d
f
l
u
s
h
ed
to
t
h
e
f
las
h
.
T
h
r
o
u
g
h
t
h
ese
p
r
o
ce
s
s
es,
t
h
e
y
r
ed
u
ce
t
h
e
n
u
m
b
er
o
f
w
r
ite
o
p
er
atio
n
s
,
lead
in
g
to
t
h
e
p
er
f
o
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m
a
n
ce
en
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an
ce
m
e
n
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f
B
-
T
r
ee
in
d
ex
o
n
f
las
h
m
e
m
o
r
y
.
3
.
1
.
1
.
I
B
SF
t
ec
hn
iqu
e
I
B
SF
u
s
e
s
a
s
o
f
t
w
ar
e
m
o
d
u
l
e
th
at
ca
n
in
s
er
t
a
f
la
s
h
la
y
e
r
o
r
co
n
v
er
t
th
e
f
ile
s
y
s
te
m
.
Mo
r
eo
v
er
,
th
e
o
r
d
er
o
f
th
e
f
la
s
h
m
e
m
o
r
y
is
li
m
ited
to
t
h
e
m
o
r
e
e
f
f
ic
ien
t
B
-
T
r
ee
co
n
s
tr
u
ctio
n
.
I
SB
F
is
i
m
p
le
m
e
n
ted
th
r
o
u
g
h
u
n
its
o
f
n
o
d
e
in
f
o
r
m
a
tio
n
ch
a
n
g
e
t
h
at
o
cc
u
r
s
d
u
e
to
th
e
ac
cu
m
u
latio
n
o
f
B
-
tr
ee
a
n
d
k
ee
p
s
t
h
e
ca
ch
e
te
m
p
o
r
ar
il
y
.
On
ce
t
h
e
b
u
f
f
er
i
s
f
u
ll,
th
e
n
o
d
e
is
b
u
ilt
b
y
co
llectin
g
all
th
e
u
n
its
an
d
co
m
m
itted
to
o
n
e
p
ag
e.
I
n
ad
d
itio
n
,
I
SB
F r
ed
u
ce
s
th
e
n
u
m
b
er
o
f
u
n
its
b
y
eli
m
i
n
ati
n
g
t
h
e
r
ed
u
n
d
an
t
u
n
its
(
u
n
its
t
h
at
ar
e
d
u
p
licated
)
o
r
k
ee
p
in
g
it
as
b
its
tr
ea
m
m
o
d
e
.
T
h
r
o
u
g
h
th
i
s
p
r
o
ce
s
s
,
I
B
SF
d
elay
s
th
e
ti
m
e
th
a
t
th
e
b
u
f
f
er
is
f
u
ll
r
ed
u
ci
n
g
th
e
n
u
m
b
er
o
f
w
r
ite
o
p
er
atio
n
s
.
T
h
er
ef
o
r
e,
t
h
e
I
SB
F
ca
n
r
ed
u
ce
t
h
e
o
v
er
h
ea
d
o
f
co
m
m
itt
i
n
g
b
ec
au
s
e
i
t
r
eq
u
ir
es
o
n
l
y
o
n
e
ac
t
iv
i
t
y
to
co
m
p
lete
[
8
].
Ho
w
e
v
er
,
I
B
S
F
s
u
f
f
er
s
f
r
o
m
d
ata
lo
s
s
i
n
t
h
e
ca
s
e
o
f
a
p
o
w
er
f
ail
u
r
e
b
ec
au
s
e
s
o
m
e
r
ec
o
r
d
s
h
av
e
n
o
t
f
l
u
s
h
ed
to
f
la
s
h
m
e
m
o
r
y
y
e
t,
an
d
,
I
B
SF
also
co
n
s
u
m
es
t
h
e
a
m
o
u
n
t
o
f
m
ai
n
m
e
m
o
r
y
.
Fig
u
r
e
6
s
h
o
w
s
t
h
e
ar
ch
itec
tu
r
e
o
f
I
B
SF
t
h
at
i
n
clu
d
es
in
d
e
x
b
u
f
f
er
,
in
s
er
tio
n
p
o
lic
y
,
d
elet
i
o
n
p
o
lic
y
,
an
d
co
m
m
it
p
o
lic
y
.
T
h
e
in
d
e
x
b
u
f
f
er
k
ee
p
s
i
n
d
ex
u
n
its
w
h
i
ch
r
ef
lect
m
o
d
if
ied
B
-
tr
ee
n
o
d
es
w
h
e
n
in
s
er
ti
n
g
,
d
eletin
g
,
o
r
m
o
d
i
f
y
in
g
t
h
e
r
ec
o
r
d
s
.
A
cc
o
r
d
in
g
t
o
t
h
e
i
n
s
er
tio
n
an
d
d
eletio
n
p
o
licies,
I
B
SF
h
an
d
le
s
in
d
e
x
u
n
i
ts
in
t
h
e
in
d
e
x
b
u
f
f
er
.
I
f
t
h
e
in
d
ex
b
u
f
f
er
is
f
illed
,
it
m
a
y
g
e
n
er
ate
th
e
co
m
m
it
o
p
er
atio
n
b
y
th
e
co
m
m
it
p
o
lic
y
.
Sin
ce
I
B
SF
s
to
r
es
t
h
e
i
n
d
ex
f
o
r
o
n
e
n
o
d
e
o
f
th
e
B
-
tr
ee
in
o
n
e
p
ag
e,
it
n
ee
d
s
n
o
t
th
e
tr
a
n
s
l
atio
n
tab
le
w
h
ic
h
is
an
ad
d
itio
n
al
o
v
er
h
ea
d
.
T
h
is
m
a
y
i
m
p
r
o
v
e
t
h
e
r
ea
d
p
er
f
o
r
m
an
ce
o
f
B
-
tr
ee
a
s
co
m
p
ar
ed
to
B
FT
L
b
ec
au
s
e
I
B
SF
v
is
it
s
o
n
e
p
ag
e
to
r
eb
u
il
d
o
n
e
n
o
d
e.
Fig
u
r
e
6
.
T
h
e
ar
ch
itectu
r
e
o
f
I
B
SF
3
.
1
.
2
.
B
F
T
L
t
ec
hn
iq
ue
B
FT
L
is
co
m
p
o
s
ed
o
f
a
r
es
er
v
atio
n
b
u
f
f
er
a
n
d
a
n
o
d
e
tr
an
s
latio
n
tab
le.
E
v
er
y
in
s
er
ted
o
r
m
o
d
if
ie
d
r
ec
o
r
d
is
te
m
p
o
r
ar
il
y
s
to
r
ed
in
t
h
e
r
eser
v
atio
n
b
u
f
f
er
.
W
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en
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Evaluation Warning : The document was created with Spire.PDF for Python.
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MR
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f
MR
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F
Evaluation Warning : The document was created with Spire.PDF for Python.
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0
0
0
0
~
2
0
0
0
0
0
.
5
R
e
a
d
~
4
0
0
0
0
~
1
0
0
0
0
W
r
i
t
e
~
3
5
0
0
0
~
1
5
0
0
0
Er
a
se
~
9
0
0
~
4
0
0
T
o
t
a
l
c
o
st
(
t
i
me
s)
~
5
0
0
0
0
~
2
0
0
0
0
0
.
7
R
e
a
d
~
5
5
0
0
0
~
1
5
0
0
0
W
r
i
t
e
~
4
5
0
0
0
~
2
0
0
0
0
Er
a
se
~
1
2
0
0
~
5
0
0
T
o
t
a
l
c
o
st
(
t
i
me
s)
~
6
5
0
0
0
~
3
0
0
0
0
1
R
e
a
d
~
7
5
0
0
0
~
2
0
0
0
0
W
r
i
t
e
~
6
5
0
0
0
~
2
5
0
0
0
Er
a
se
~
1
7
5
0
~
7
5
0
T
o
t
a
l
c
o
st
(
t
i
me
s)
~
8
0
0
0
0
~
4
0
0
0
0
3
.
2
.
I
nd
e
x
s
eg
m
ent
lo
g
direct
o
ry
t
ec
hn
ica
l g
ro
up
T
h
is
is
a
g
r
o
u
p
u
s
i
n
g
t
h
e
i
n
d
ex
s
e
g
m
e
n
t
lo
g
d
ir
ec
to
r
y
tec
h
n
i
q
u
e
s
f
o
r
f
ai
lu
r
e
r
ec
o
v
er
y
.
T
h
is
g
r
o
u
p
in
cl
u
d
es
B
I
SL
D
,
T
*
-
I
S
L
D
,
an
d
NA
ND
F
las
h
Fil
e
C
r
ash
R
ec
o
v
er
y
T
ec
h
n
iq
u
e.
3
.
2
.
1
.
B
I
SL
D
t
ec
hn
iqu
e
B
I
SL
D
(
B
+
-
T
r
ee
I
n
d
ex
Seg
m
en
t
L
o
g
T
ec
h
n
ical
Dir
ec
to
r
y
)
tech
n
iq
u
e
is
a
f
ail
u
r
e
r
ec
o
v
er
y
m
et
h
o
d
u
s
i
n
g
th
e
B
+
-
tr
ee
an
d
th
e
d
ir
e
cto
r
y
lo
g
b
u
f
f
er
[
1
6
].
Am
o
n
g
th
e
d
if
f
er
en
t
lo
g
g
in
g
tec
h
n
iq
u
es,
it
ap
p
lies
d
ela
y
tech
n
iq
u
es
f
o
r
r
ec
o
v
er
y
.
On
ce
co
m
p
leted
,
it
p
er
f
o
r
m
s
r
ec
o
v
er
y
t
h
r
o
u
g
h
r
e
o
p
er
atio
n
an
d
w
it
h
u
p
d
ated
ac
tiv
itie
s
i
n
th
e
lo
g
d
ir
ec
to
r
y
.
T
h
e
B
I
S
L
D
al
g
o
r
ith
m
is
as
f
o
llo
w
s
.
Step
1:
Get
t
h
e
i
n
s
e
r
ted
lea
f
n
o
d
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
10
,
No
.
1
,
Feb
r
u
ar
y
2
0
2
0
:
3
6
0
-
376
368
Step
2
:
Get
a
n
o
d
e
w
it
h
a
v
a
lu
e
less
t
h
an
t
h
e
k
e
y
v
al
u
e
o
f
t
h
e
in
d
ex
n
o
d
e.
Step
3
:
I
f
th
e
in
s
er
ted
k
e
y
i
s
lar
g
er
th
an
t
h
e
k
e
y
v
al
u
e
o
f
t
h
e
in
d
e
x
n
o
d
e,
f
o
llo
w
th
e
lar
g
er
v
al
u
e
k
e
y
.
Step
4
:
T
ak
e
th
e
n
e
x
t
b
u
tto
n
.
An
d
th
e
la
s
t
s
tep
:
R
ep
ea
t
u
n
til
t
h
e
lea
f
n
o
d
e
to
in
s
er
t
is
f
o
u
n
d
[
1
6
]
.
T
h
is
tech
n
iq
u
e
u
s
e
s
B
+
-
tr
ee
a
n
d
is
p
r
o
n
e
to
u
p
d
atin
g
th
e
lo
ca
tio
n
f
r
eq
u
e
n
tl
y
i
n
t
h
e
s
a
m
e
ar
ea
w
h
ile
w
o
r
k
i
n
g
.
Fo
r
th
at
r
ea
s
o
n
,
co
s
ts
in
c
u
r
i
f
t
h
e
r
ec
o
v
er
y
p
r
o
ce
s
s
f
ails
.
Fi
g
u
r
e
9
s
h
o
w
s
t
h
e
r
ec
o
v
er
y
s
tr
u
ct
u
r
e
o
f
B
I
S
L
D.
T
h
e
B
+
-
tr
ee
alg
o
r
it
h
m
is
ap
p
lied
to
th
e
i
n
s
er
tio
n
a
n
d
r
etr
iev
al
o
f
a
p
ar
ticu
lar
clie
n
t
s
o
th
at
it
i
s
p
o
s
s
ib
le
to
q
u
ic
k
l
y
r
etr
ie
v
e
t
h
e
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ed
o
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g
in
t
h
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ev
e
n
t
o
f
s
p
ec
if
ic
clien
t
f
ail
u
r
e
b
ec
au
s
e
it i
s
s
u
p
er
io
r
to
o
t
h
er
in
d
ex
es
w
h
e
n
s
e
ar
ch
in
g
.
Fig
u
r
e
9
.
R
ec
o
v
er
y
s
tr
u
ct
u
r
e
in
B
I
SL
D
3
.
2
.
2
.
T*
-
I
SL
D
m
et
ho
d r
ec
o
v
er
y
s
y
s
t
e
m
s
t
ruct
ure
T
h
e
r
ec
o
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er
y
s
tr
u
ct
u
r
e
o
f
T
*
-
I
SLD
i
n
cl
u
d
es
t
h
e
T
*
-
tr
ee
in
d
e
x
;
t
h
e
lo
g
d
ir
ec
to
r
y
as
s
h
o
w
n
in
Fig
u
r
e
10
.
T
h
e
T
*
-
tr
ee
alg
o
r
ith
m
is
ap
p
lied
w
h
e
n
i
n
s
er
ti
n
g
an
d
r
etr
iev
i
n
g
d
ata
[
9
]
.
A
p
p
ly
in
g
al
g
o
r
ith
m
s
,
r
ec
o
v
er
y
i
s
p
er
f
o
r
m
ed
q
u
ick
l
y
b
y
q
u
ick
ac
ce
s
s
to
R
ed
o
L
o
g
,
w
h
e
n
er
r
o
r
s
o
cc
u
r
w
it
h
s
p
ec
if
ic
f
la
s
h
m
e
m
o
r
y
.
T
h
is
is
b
ec
au
s
e
T
*
-
tr
ee
ex
ce
l
s
in
i
n
s
er
t
io
n
a
n
d
r
etr
iev
a
l,
co
m
p
ar
ed
to
o
t
h
er
in
d
e
x
es [
9
].
T
h
e
c
u
r
r
en
t te
c
h
n
iq
u
e
cr
ea
tes
an
i
n
d
ex
u
n
it
w
h
e
n
T
*
-
tr
ee
is
ch
a
n
g
ed
,
m
ain
tain
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it
i
n
t
h
e
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u
f
f
e
r
,
a
n
d
e
x
ec
u
te
s
th
e
co
m
m
it
w
h
en
th
e
b
u
f
f
er
is
f
u
ll.
I
t
al
s
o
r
ec
o
r
d
s
an
d
s
to
r
es
c
h
an
g
e
t
h
e
i
n
f
o
r
m
atio
n
in
th
e
lo
g
,
co
m
m
it
s
al
l
in
d
ex
u
n
it
s
w
h
e
n
th
e
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r
ig
i
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al
n
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e
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c
h
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g
ed
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d
ex
ec
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tes t
h
e
ch
ec
k
p
o
in
t.
Fig
u
r
e
10.
R
ec
o
v
er
y
s
tr
u
ctu
r
e
in
T
*
-
I
S
L
D
Failu
r
e
r
ec
o
v
er
y
al
g
o
r
ith
m
i
s
as
s
h
o
w
n
i
n
Fi
g
u
r
e
1
1
.
I
n
s
er
tio
n
an
d
r
etr
ie
v
al
ar
e
ap
p
li
ed
to
th
e
T*
-
tr
ee
al
g
o
r
ith
m
.
T
h
is
a
lg
o
r
it
h
m
r
et
r
iev
es
R
ed
o
L
o
g
in
ca
s
e
o
f
a
f
ai
lu
r
e
i
n
s
p
ec
i
f
ic
f
las
h
m
e
m
o
r
y
a
n
d
en
ab
les
q
u
ick
r
ec
o
v
er
y
.
T
h
e
lo
g
r
ec
o
r
d
o
f
th
e
f
ai
lu
r
e
r
ec
o
v
er
y
c
an
b
e
d
i
v
id
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in
to
R
ed
o
an
d
Un
d
o
co
m
m
a
n
d
s
.
T
h
e
lo
g
r
ec
o
r
d
is
m
an
a
g
ed
i
n
th
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lo
g
a
n
d
h
as
t
h
e
f
o
r
m
o
f
<c
o
m
m
a
n
d
,
n
o
d
e
n
u
m
b
er
,
k
e
y
n
u
m
b
er
>
d
u
r
i
n
g
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2
0
8
8
-
8708
A
s
u
r
ve
y
o
f d
a
ta
r
ec
o
ve
r
y
o
n
f
la
s
h
mem
o
r
y
(
V
a
n
Da
i Tr
a
n
)
369
th
e
c
h
an
g
es
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th
e
T
*
-
tr
ee
.
Fo
r
ex
a
m
p
le,
<I
n
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t,
A
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2
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>
is
a
co
m
m
a
n
d
to
i
n
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er
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k
e
y
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e
o
f
2
0
to
th
e
n
o
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e
A
.
Fo
r
f
ail
u
r
e
r
ec
o
v
er
y
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t
h
e
s
to
r
ed
A
,
B
,
an
d
C
n
o
d
es
i
n
t
h
e
f
las
h
m
e
m
o
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y
ar
e
u
s
ed
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b
u
ild
th
e
T
*
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tr
ee
,
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d
t
h
en
t
h
e
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g
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n
f
o
r
m
atio
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i
s
u
s
ed
to
p
er
f
o
r
m
r
ec
o
v
er
y
b
e
f
o
r
e
th
e
f
a
ilu
r
e.
Fig
u
r
e
1
1
.
Failu
r
e
R
ec
o
v
er
y
A
lg
o
r
ith
m
3
.
2
.
3
.
NAND
f
la
s
h f
ile
cr
a
s
h r
ec
o
v
er
y
t
ec
hn
iqu
e
T
h
is
tech
n
iq
u
e
i
s
u
s
ed
to
ef
f
ec
tiv
el
y
r
e
s
e
t
i
n
ab
n
o
r
m
al
f
i
l
e
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y
s
t
e
m
cr
a
s
h
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i
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s
b
y
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a
n
g
in
g
th
e
s
etti
n
g
s
o
f
t
h
e
w
o
r
k
ar
ea
s
o
th
at
th
e
b
u
r
n
to
o
l
o
p
er
atio
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i
s
o
n
l
y
u
s
ed
i
n
s
p
ec
if
ic
ar
ea
s
o
f
th
e
e
n
tire
f
la
s
h
m
e
m
o
r
y
ca
p
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it
y
.
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n
ad
d
iti
o
n
,
th
e
w
o
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k
ar
ea
d
ata
ca
n
b
e
s
av
ed
i
n
th
e
r
eser
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e
d
s
p
ac
e,
s
o
w
h
e
n
th
e
i
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itializa
tio
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i
s
d
o
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e,
t
h
e
u
s
er
ca
n
ca
p
tu
r
e
t
h
e
co
p
y
o
f
th
e
m
o
s
t
r
ec
e
n
t
s
et
ac
tiv
it
y
.
T
h
r
o
u
g
h
t
h
is
s
tr
u
ct
u
r
e,
o
n
l
y
t
h
e
m
o
s
t r
ec
en
t
w
o
r
k
ar
e
a
i
s
in
s
p
ec
ted
an
d
in
itia
lized
in
ac
cid
en
t s
itu
a
tio
n
s
.
T
h
e
am
o
u
n
t o
f
ti
m
e
r
eq
u
ir
ed
f
o
r
a
cr
ash
to
b
e
r
esto
r
ed
co
r
r
esp
o
n
d
in
g
l
y
in
cr
ea
s
e
s
w
i
th
t
h
e
s
ize
o
f
th
e
w
o
r
k
ar
ea
.
T
h
is
tech
n
iq
u
e
s
o
l
v
es
th
e
p
r
o
b
lem
o
f
i
n
cr
ea
s
i
n
g
s
ca
l
ab
ilit
y
:
n
o
m
atter
h
o
w
lar
g
e
t
h
e
a
m
o
u
n
t
o
f
f
las
h
m
e
m
o
r
y
is
,
th
e
r
ec
o
v
er
y
ti
m
e
co
r
r
esp
o
n
d
s
to
it.
Ho
w
e
v
er
,
th
is
tech
n
iq
u
e
h
a
s
a
w
ea
k
n
e
s
s
i
n
t
h
e
ca
p
ac
it
y
o
f
f
la
s
h
m
e
m
o
r
y
t
h
at
i
s
n
o
t
co
m
m
e
n
s
u
r
ate
w
it
h
t
h
e
r
ec
o
v
e
r
y
t
i
m
e
[
1
7
].
Fig
u
r
e
1
2
s
h
o
w
s
th
e
cr
ash
r
ec
o
v
er
y
tech
n
iq
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