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&
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.
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,
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20
20
:
5
45
-
55
1
546
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[
9
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1
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]
.
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nl
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p
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a
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b
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he
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e
c
t
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.
‖
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nt
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p
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nt
i
a
l
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rt
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no
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re
p
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a
t
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t
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g
ri
t
y
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a
nd
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c
a
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s
t
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p
.
T
he
s
y
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m
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p
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p
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;
t
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s
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a
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s
.
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b
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[11
-
14]
.
I
n
W
S
N
,
s
i
z
e
o
f
t
ra
ns
m
i
t
t
e
d
d
a
t
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d
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re
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y
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rgy
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s
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m
p
t
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n
.
T
h
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re
f
o
r
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,
p
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pe
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p
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a
n
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y
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t
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b
a
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s
t
a
t
i
o
n
[
15
-
1
7]
.
Th
e
c
o
n
t
ri
b
ut
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n
s
o
f
t
h
i
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p
a
pe
r
a
r
e
a
s
f
o
l
l
ow
s
:
a)
D
e
ve
l
o
pm
e
n
t
o
f
a
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y
s
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m
t
ha
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t
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t
y
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nd
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-
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t
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s
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gl
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b)
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e
ve
l
o
pm
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n
t
o
f
a
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y
s
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h
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t
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a
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d
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a
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s
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s
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pub
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.
c)
It
a
v
o
i
ds
a
pp
l
y
i
n
g
d
a
t
a
s
e
c
uri
t
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go
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.
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d
i
nt
o
s
e
c
t
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s
,
S
e
c
t
i
o
n
1
i
s
a
p
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f
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c
e
w
h
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p
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b
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m
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m
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s
t
i
m
po
rt
a
nt
go
a
l
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v
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be
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n
de
f
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d.
S
e
c
o
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d
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t
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n
t
t
hr
o
ug
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d
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pr
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b
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m
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di
s
c
us
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d
s
t
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n
g
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s
a
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d
w
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a
kn
e
s
s
e
s
of
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t
.
T
h
i
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s
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c
t
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o
n
s
po
ke
a
bo
ut
t
h
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pr
o
po
s
e
d
s
y
s
t
e
m
a
n
d
i
n
c
l
ude
d
c
o
de
,
a
d
i
a
g
ra
m
a
n
d
m
a
t
h
e
m
a
t
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c
a
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qu
a
t
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o
n,
a
n
d
f
o
ur
t
h
s
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c
t
i
o
n
di
s
c
us
s
e
s
r
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s
ul
t
s
a
nd
c
o
m
pa
ri
n
g
t
h
e
m
t
o
a
l
go
ri
t
hm
s
e
xi
s
t
a
nd
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l
a
s
t
pa
rt
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o
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m
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t
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d
c
o
n
c
l
u
s
i
o
n
.
2.
EF
F
I
C
I
EN
T
D
A
TA
C
O
LLEC
TI
O
N
A
N
D
D
I
S
S
EM
I
N
A
T
I
O
N
(ED
C
D
)
A
s
t
udy
by
L
i
,
F
.
,
&
X
i
o
n
g
de
v
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l
o
p
e
d
a
m
e
t
h
o
d
c
a
l
l
e
d
E
D
CD
1
f
o
r
r
e
duc
i
ng
t
h
e
num
b
e
r
o
f
da
t
a
pr
o
pa
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a
t
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o
n
a
nd
a
m
o
un
t
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f
da
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xt
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v
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l
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n
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t
w
o
r
k
[18
-
2
0]
.
T
h
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pr
o
po
s
e
d
E
D
CD
1
w
a
s
b
a
s
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d
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f
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d
i
n
a
s
s
h
o
w
n
i
n
(
1
)
, w
h
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r
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β
i
s
t
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m
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xi
m
um
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ff
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r
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t
i
a
l
v
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l
ue
.
{
|
(
)
(
)
|
(
)
(1)
Pseudo code for the EDCD1 algorithm as presented in
[8]
EDCD1 Algorithm
Inputs
(
)
,
(
)
and
Output
: the binary parameter to send data / not send data
Begin
Set
(
)
← last measuring value transmitted by the sensor
Read: the sensor value (V) at
t
time
Set
(
)
← V
//Calculate the
relative change (
)
=Abs(
(
)
(
)
) /
(
(
)
)
If
Then
Set
Else: Set
End if
// The decision to send data
If
Then
transmit (ON) // Send the new data
Else
transmit (Off) // No
End If
End Algorithm
Th
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d
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c
i
s
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-
m
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(1)
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h
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d
v
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o
f
f
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r
t
h
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up
da
t
e
.
Evaluation Warning : The document was created with Spire.PDF for Python.
In
do
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s
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a
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J
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l
e
c
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&
Co
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:
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4752
A
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Mahm
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k
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)
547
3.
R
S
A
A
LG
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w
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da
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RSA
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Key generation
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Evaluation Warning : The document was created with Spire.PDF for Python.
IS
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47
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GO TO START
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4]
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5]
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-
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8]
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,
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.
687
-
69
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20
19.
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16]
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p
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2
019
.
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17]
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18]
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.
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19]
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.
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20]
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.
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"
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k
om
ni
k
a
,
v
o
l
.
18
,
2020
.
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551
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pp
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459
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26]
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-
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[
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r
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(
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,
pp
.
443
-
447
,
2019
.
[
28]
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[
29]
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s
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ppo
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t
uni
t
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s
,
"
e
d:
E
l
s
e
v
i
e
r
,
2018
.
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