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1
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2
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[
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tr
o
l
s
y
s
te
m
s
i
n
d
if
f
er
e
n
t
ar
ea
s
[
1
2
-
1
6
]
,
th
is
w
o
r
k
d
ee
m
s
it
f
it
to
in
te
g
r
ate
au
to
m
a
tio
n
t
o
m
ee
t
s
o
m
e
o
f
th
e
n
ee
d
s
o
f
t
h
e
d
is
ab
led
in
d
iv
id
u
a
l.
T
h
e
p
r
o
p
o
s
ed
m
o
d
el
in
th
is
s
t
u
d
y
i
s
l
i
m
i
t
e
d
t
o
t
h
e
s
o
u
n
d
o
r
s
p
e
e
c
h
r
e
c
o
g
n
i
t
i
o
n
m
o
d
e
o
f
a
u
t
h
e
n
t
i
c
a
t
i
o
n
.
A
l
t
h
o
u
g
h
t
h
e
r
e
i
s
a
n
o
t
h
e
r
a
u
t
h
e
n
t
i
c
a
t
i
o
n
m
o
d
e
t
o
g
a
i
n
a
c
c
e
s
s
s
u
c
h
R
F
I
D
[
1
7
-
1
9
]
,
b
i
o
m
e
t
r
i
c
s
[
2
0
-
2
2
]
,
P
I
N
[
2
3
,
2
4
]
a
n
d
o
r
a
co
m
b
i
n
atio
n
[
2
5
-
2
7
]
,
th
is
s
tu
d
y
f
o
c
u
s
es o
n
th
e
v
o
ice
r
ec
o
g
n
itio
n
.
2.
M
AT
E
RIAL
S
AND
M
E
T
H
O
DS
T
h
e
b
u
lk
o
f
th
is
w
o
r
k
h
a
n
g
s
o
n
th
e
s
o
f
t
w
ar
e
p
ar
t,
alth
o
u
g
h
t
h
e
h
ar
d
w
ar
e
p
ar
t
is
also
im
p
o
r
tan
t.
Mo
s
t
o
f
t
h
e
h
ar
d
w
ar
e
co
m
p
o
n
e
n
ts
u
s
ed
w
er
e
r
ea
d
y
-
m
ad
e;
th
e
te
ch
n
ica
l
asp
ec
t
o
f
th
e
h
ar
d
w
ar
e
lies
o
n
t
h
e
co
r
r
ec
t
r
atin
g
s
o
f
all
t
h
e
co
m
p
o
n
e
n
t
s
an
d
r
ig
h
t
co
n
n
ec
tio
n
.
I
n
th
i
s
w
o
r
k
,
th
e
R
asp
b
er
r
y
P
i
s
i
n
g
le
b
o
ar
d
co
m
p
u
ter
(
SB
C
)
s
o
f
t
w
ar
e
is
d
ep
lo
y
ed
f
o
r
th
e
d
esig
n
o
f
s
p
ee
c
h
r
ec
o
g
n
it
io
n
s
y
s
te
m
.
T
h
e
R
asp
b
er
r
y
P
i
s
o
f
t
w
ar
e
is
u
s
ed
to
co
n
f
i
g
u
r
e
th
e
h
ar
d
w
ar
e
f
o
r
th
e
r
eq
u
ir
ed
ac
tio
n
.
A
s
th
i
s
w
o
r
k
is
b
ased
o
n
in
ter
n
et
o
f
t
h
i
n
g
s
(
I
o
T
)
,
in
ter
n
et
co
n
n
ec
ti
v
it
y
is
r
eq
u
ir
ed
to
b
e
s
etu
p
.
I
n
th
i
s
w
o
r
k
,
in
ter
n
et
co
n
n
ec
ti
v
it
y
is
g
o
tte
n
th
r
o
u
g
h
USB
W
i
-
Fi
ad
ap
ter
.
Fo
r
ea
s
e
o
f
id
en
ti
f
icatio
n
,
F
ig
u
r
e
1
s
h
o
w
s
t
h
e
b
lo
ck
d
iag
r
a
m
o
f
th
e
p
r
o
p
o
s
ed
s
y
s
te
m
.
Fig
u
r
e
1
.
B
lo
ck
d
iag
r
a
m
f
o
r
th
e
s
p
ee
ch
r
ec
o
g
n
it
io
n
s
y
s
te
m
3.
DE
S
I
G
N
SPEC
I
F
I
C
AT
I
O
N
S
T
h
e
d
esig
n
s
p
ec
i
f
icatio
n
s
o
f
th
e
s
p
ee
c
h
r
ec
o
g
n
it
io
n
f
o
r
ac
ce
s
s
co
n
tr
o
l
m
o
d
u
le
d
ea
ls
w
it
h
th
e
co
n
d
itio
n
s
n
ec
ess
ar
y
f
o
r
t
h
e
f
u
n
ctio
n
alit
y
o
f
t
h
e
m
o
d
u
l
e
o
p
ti
m
all
y
.
Fo
r
t
h
i
s
w
o
r
k
,
t
w
o
t
y
p
es
o
f
d
es
ig
n
s
p
ec
if
icatio
n
s
w
o
u
ld
b
e
co
n
s
i
d
er
ed
n
am
e
l
y
:
h
ar
d
w
ar
e
a
n
d
s
o
f
t
w
ar
e
s
p
ec
if
ica
tio
n
s
3
.
1
.
H
a
rdw
a
re
s
pecif
ica
t
io
ns
T
h
e
h
ar
d
w
ar
e
s
p
ec
if
icat
io
n
d
e
als
w
it
h
t
h
e
o
p
ti
m
al
co
n
d
itio
n
s
n
ec
e
s
s
ar
y
f
o
r
th
e
m
o
d
u
le
to
f
u
n
c
tio
n
.
T
h
ese
co
n
d
itio
n
s
i
n
cl
u
d
e:
a.
Op
er
at
in
g
c
u
r
r
en
t:
T
h
e
cu
r
r
en
t
s
o
u
r
ce
n
ee
d
ed
to
p
o
w
er
u
p
th
e
r
a
s
p
b
er
r
y
p
i,
a
n
d
all
th
e
p
er
ip
h
er
al
d
ev
ices a
ttac
h
ed
to
it sh
o
u
ld
p
r
o
v
id
e
at
least 2
A
o
f
c
u
r
r
en
t.
b.
Op
er
atin
g
v
o
lta
g
e:
T
h
e
o
p
er
atin
g
v
o
lta
g
e
b
y
w
h
ich
t
h
e
r
asp
b
er
r
y
p
i
f
u
n
ctio
n
s
i
s
5
V
.
T
h
e
cu
r
r
en
t
co
m
p
e
n
s
ate
s
to
p
r
o
v
id
e
a
r
eq
u
ir
ed
p
o
w
er
o
f
ab
o
u
t
1
0
W
.
(
5
V
x
2
A
=
10
W
)
.
I
t
ca
n
b
e
s
e
en
t
h
at
t
h
is
i
s
a
v
er
y
lo
w
p
o
w
er
d
ev
ice.
Ass
u
m
in
g
a
7
5
0
0
m
Ah
b
atter
y
i
s
u
s
ed
to
p
o
w
er
u
p
t
h
is
d
e
v
ice,
t
h
e
m
o
d
u
le
ca
n
last
f
o
r
al
m
o
s
t 4
h
o
u
r
s
b
e
f
o
r
e
a
b
atter
y
r
ec
h
ar
g
e
w
o
u
ld
b
e
r
eq
u
ir
ed
.
c.
Op
er
atin
g
te
m
p
er
atu
r
e:
T
h
e
o
f
f
icial
o
p
er
atin
g
te
m
p
er
at
u
r
e
r
an
g
e
f
o
r
th
e
r
asp
b
er
r
y
p
i
is
f
r
o
m
-
4
0
℃
to
8
5
℃.
A
s
t
h
e
te
m
p
er
at
u
r
e
b
eg
i
n
s
to
ap
p
r
o
ac
h
8
2
℃,
th
e
p
er
f
o
r
m
an
ce
i
s
th
er
m
all
y
th
r
o
ttled
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
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I
n
t J
E
lec
&
C
o
m
p
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n
g
,
Vo
l.
11
,
No
.
2
,
A
p
r
il 2
0
2
1
:
1
7
9
6
-
1803
1798
3
.
2
.
So
f
t
wa
re
s
pecif
ica
t
io
ns
T
h
e
s
o
f
t
w
ar
e
s
p
ec
if
icat
io
n
s
n
e
ce
s
s
ar
y
f
o
r
th
e
m
o
d
u
le
to
r
u
n
o
p
tim
a
ll
y
i
n
cl
u
d
e:
a.
T
h
e
R
A
M
s
ize
:
T
h
e
R
A
M
s
iz
e
r
eq
u
ir
ed
f
o
r
th
is
p
r
o
j
ec
t
is
5
1
2
MB
an
d
th
e
r
asp
b
er
r
y
p
i
ze
r
o
m
ee
ts
t
h
is
s
p
ec
if
icatio
n
.
b.
T
h
e
R
OM
s
ize
:
T
h
e
m
i
n
i
m
u
m
R
OM
s
ize
(
s
to
r
ag
e
s
p
ac
e
o
f
th
e
m
icr
o
SD
ca
r
d
)
is
8
GB
.
I
n
th
i
s
p
r
o
j
ec
t
,
an
8
GB
class
1
0
m
icr
o
SD c
ar
d
.
T
h
is
m
e
m
o
r
y
ca
r
d
h
as a
v
er
y
h
i
g
h
r
ea
d
an
d
w
r
ite
s
p
ee
d
o
f
1
0
MB
/s
.
c.
T
h
e
p
r
o
c
e
s
s
o
r
:
T
h
e
p
r
o
c
e
s
s
o
r
t
h
a
t
i
s
n
e
c
e
s
s
a
r
y
f
o
r
r
u
n
n
i
n
g
t
h
e
s
o
f
t
w
a
r
e
o
f
t
h
i
s
p
r
o
j
e
c
t
w
o
r
k
i
s
t
h
e
B
r
o
ad
co
m
B
C
M2
8
3
5
s
y
s
te
m
o
n
c
h
ip
(
So
C
)
w
ith
a
n
A
R
M
1
1
C
P
U
r
u
n
n
in
g
1
GHz.
d.
T
h
e
o
p
e
r
atin
g
s
y
s
te
m
:
T
h
e
o
p
er
atin
g
s
y
s
te
m
,
w
h
ich
t
h
e
r
asp
b
er
r
y
p
i
(
th
e
co
n
tr
o
l
u
n
i
t
o
f
th
e
m
o
d
u
le)
r
u
n
s
is
a
Deb
ia
n
b
ased
d
is
tr
ib
u
tio
n
.
I
t
i
s
m
o
u
n
ted
o
n
a
n
S
D
ca
r
d
,
w
h
ich
ta
k
e
s
at
leas
t
4
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o
f
s
p
ac
e.
T
h
e
Deb
ian
d
is
tr
ib
u
tio
n
i
s
k
n
o
w
n
as
R
asp
b
ian
.
F
i
g
u
r
e
2
s
h
o
w
s
t
h
e
c
i
r
c
u
i
t
d
i
a
g
r
a
m
o
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e
p
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p
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e
d
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y
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t
e
m
a
n
d
i
t
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r
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a
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y
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d
a
a
p
p
l
i
c
a
t
i
o
n
.
Fig
u
r
e
2
.
C
ir
cu
i
t d
ia
g
r
a
m
3
.
3
.
Desig
n a
na
ly
s
is
L
et
(
)
r
ep
r
esen
ts
s
p
ee
ch
s
i
g
n
al
w
h
ich
i
s
a
f
u
n
c
tio
n
o
f
ti
m
e.
T
h
e
tim
e
v
ar
y
i
n
g
s
p
ec
tr
u
m
o
f
t
h
e
s
p
e
e
c
h
c
a
n
b
e
o
b
t
a
i
n
e
d
f
r
o
m
t
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e
t
im
e
v
a
r
y
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n
g
F
o
u
r
i
e
r
t
r
a
n
s
f
o
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m
o
f
t
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e
s
i
g
n
a
l
(
)
a
s
s
h
o
w
n
i
n
F
i
g
u
r
e
3
.
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
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Desig
n
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n
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A
d
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b
d
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lka
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1799
Fig
u
r
e
3
.
T
im
e
v
ar
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in
g
s
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ec
t
u
r
m
o
f
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ee
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r
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d
u
ctio
n
3
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4
.
F
o
urier
m
et
ho
d
s
T
h
e
s
h
o
r
t
-
t
i
m
e
F
o
u
r
i
e
r
t
r
a
n
s
f
o
r
m
o
f
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c
h
s
i
g
n
a
l
(
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c
a
n
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e
c
a
l
c
u
l
a
t
e
d
u
s
i
n
g
(
1
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a
s
g
i
v
e
n
i
n
[
2
8
]
.
Xn
(
ω
)
=
∑
(
−
−
)
∞
=
−
∞
(
1
)
w
h
er
e
in
d
ex
‘
n
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is
r
ef
er
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ed
to
as
tim
e
n
T
,
w
h
ic
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n
s
t
h
a
t
Xn
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ω
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=(
n
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y
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er
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e
Fo
u
r
ier
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s
f
o
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m
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(
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s
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ig
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al)
is
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ec
o
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ed
a
s
s
h
o
w
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i
n
e
(
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:
=
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2
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(
2
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Sin
ce
(
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is
a
f
u
n
ctio
n
o
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it
ch
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g
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I
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N
:
2
0
8
8
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I
n
t J
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&
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g
,
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l.
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2
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1
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I
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0
8
8
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&
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p
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,
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l.
11
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2
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1
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7
9
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4.
RE
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rm
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8
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9
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0
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sla
,
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ter
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p
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1
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4
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J.
S
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.
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5
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.
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6
]
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.
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ra
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.
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to
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.
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p
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9
-
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2
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.
[2
7
]
Y.
L
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,
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.
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ie,
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rlso
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,
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G
.
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Bian
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p
.
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.
[2
8
]
S
.
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L
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so
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,
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ry
,
2
0
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5
.
[2
9
]
S
.
K.
P
a
tel,
J.
M
.
Dh
o
d
iy
a
,
a
n
d
D.
C.
Jo
sh
i
,
"
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th
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ti
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l
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o
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Ba
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ter
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&
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l.
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p
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1
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.
[3
0
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L
.
R.
Ra
b
in
e
r,
"
A
tu
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id
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M
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rk
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IEE
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v
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l.
7
7
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o
.
2
,
p
p
.
2
5
7
-
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8
6
,
1
9
8
9
.
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