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an
y
u
p
co
m
i
n
g
p
r
o
d
u
ct
[
6
]
.
I
n
d
u
s
t
r
i
es
h
a
v
e b
ee
n
t
a
k
i
n
g
f
eed
b
ack
s
f
r
o
m
c
o
n
s
um
e
r
s
f
or
a
v
e
r
y
l
on
g t
i
m
e
,
but
i
t
i
s
no
t
a
c
o
m
p
l
e
t
e
l
y
ge
nui
ne
o
ne
a
nd
t
he
r
e
f
o
r
e
no
t
a
s
he
l
p
f
ul
f
o
r
t
he
i
nd
us
t
r
y a
s
i
t
s
ho
ul
d
b
e
.
I
n
t
h
i
s
r
es
ear
ch
w
o
r
k
,
w
e
m
ak
e u
s
e o
f
t
h
e co
n
cep
t
cal
l
ed
o
p
i
n
i
o
n
m
i
n
i
n
g
.
T
h
e m
et
h
o
d
o
f
ex
t
r
act
i
n
g
opi
n
i
on
/
k
no
w
l
e
d
ge
f
r
o
m
a
d
a
t
a
s
e
t
i
s
k
no
w
n a
s
o
p
i
ni
o
n
m
i
ni
n
g o
r
s
e
nt
i
m
e
nt
a
na
l
ys
i
s
o
r
e
m
o
t
i
o
n
A
I
[
7
]
.
O
p
in
io
n
m
i
n
i
n
g
o
r
s
e
n
ti
m
e
n
t a
n
a
l
y
s
is
is
w
id
e
l
y
u
s
e
d
to
e
x
tr
a
c
t in
f
o
r
m
a
tio
n
f
r
o
m
t
h
e
d
a
ta
s
e
t a
b
o
u
t a
p
r
o
d
u
c
t
o
r
a
n
y
s
p
e
c
i
f
i
c
t
hi
ng.
I
t
d
e
a
l
s
w
i
t
h
na
t
ur
a
l
l
a
n
gua
ge
p
r
o
c
e
s
s
i
ng,
c
o
m
p
ut
a
t
i
o
na
l
l
i
ng
ui
s
t
i
c
s
a
nd
t
e
xt
a
na
l
yt
i
c
s
[8
].
I
n
t
h
e p
as
t
d
eca
d
e t
h
er
e h
av
e b
een
m
an
y
r
es
e
ar
ch
w
o
r
k
s
t
o
w
ar
d
s
s
e
n
t
i
m
en
t
an
al
y
s
i
s
w
h
i
ch
h
a
s
e
n
h
a
n
c
e
d t
h
i
s
f
i
e
l
d a
n
d pr
ov
i
de
d s
i
gn
i
f
i
c
a
nt
i
m
pl
e
m
e
n
t
a
t
i
on
s
[
9]
.
I
n
t
h
i
s
w
or
k
,
w
e
h
a
v
e
pr
opos
e
d
a
f
r
a
m
e
w
o
r
k,
w
hi
c
h
w
i
l
l
e
na
b
l
e
us
e
r
s
t
o
c
he
c
k t
he
ke
y
f
e
a
t
u
r
es
t
h
at
t
h
e cu
s
t
o
m
er
s
ar
e
m
o
r
e co
n
cer
n
ed
ab
o
u
t
an
d
i
n
t
er
es
t
ed
.
T
h
i
s
f
r
a
m
e
w
o
r
k
w
i
l
l
en
ab
l
e
u
s
er
s
t
o
u
n
d
er
s
t
an
d
t
h
e r
at
i
n
g
s
o
f
t
h
e p
r
o
d
u
ct
s
s
o
l
d
b
y
t
h
e
i
n
dus
t
r
y
m
or
e
a
ppr
opr
i
a
t
e
l
y
.
I
n t
he
c
ur
r
e
nt
c
o
nt
e
xt
,
s
o
m
a
n
y r
e
l
a
t
e
d
w
o
r
k i
s
p
ub
l
i
s
he
d
r
e
c
e
nt
l
y
,
w
h
i
c
h c
o
ve
r
s
O
p
in
io
n
m
i
n
in
g
r
e
la
te
d
to
s
m
a
r
tp
h
o
n
e
i
n
d
u
s
tr
y
.
B
u
t
s
till
th
e
r
e
is
a
r
e
s
e
a
r
c
h
g
a
p
e
x
is
tin
g
.
T
h
e
f
o
llo
w
i
n
g
s
e
c
tio
n
p
r
e
s
e
n
ts
s
ta
te
o
f
th
e
a
r
t lite
r
a
tu
r
e
m
e
th
o
d
s
.
A
s
u
r
et
al
[
1
0
]
,
h
av
e d
e
m
o
n
s
t
r
at
ed
t
h
e
u
s
e o
f
s
o
ci
al
m
ed
i
a,
p
ar
t
i
cu
l
ar
l
y
T
w
i
t
t
er
t
o
a
n
al
y
ze
a
nd
p
r
ed
i
ct
o
u
t
co
m
es
o
f
r
eal
w
o
r
l
d
s
cen
ar
i
o
s
.
U
s
i
n
g
t
h
e
T
w
i
t
t
e
r
ch
at
t
er
b
o
x
w
as
t
h
ei
r
p
r
i
m
a
r
y
s
o
u
r
ce
o
f
d
at
a.
T
he
y p
e
r
f
o
r
m
ed
a ca
s
e s
t
u
d
y
t
o
f
o
r
ecas
t
box
-
o
f
f
i
c
e
r
e
ve
nue
s
f
o
r
m
o
vi
e
s
.
T
he
y
e
xp
l
a
i
ne
d
w
i
t
h a
s
i
m
p
l
e
m
o
d
e
l
th
e
y
h
a
d
b
u
ilt to
s
h
o
w
h
o
w
t
h
e
c
r
e
a
tio
n
r
at
e o
f
t
w
eet
s
ab
o
u
t
an
y
t
o
p
i
c an
d
h
o
w
i
t
o
u
t
p
er
f
o
r
m
s
m
ar
k
et
-
b
as
ed
p
r
ed
i
ct
o
r
s
.
T
h
ey
h
a
v
e s
h
o
w
n
t
h
e u
t
i
l
i
zat
i
o
n
o
f
s
o
ci
al
m
ed
i
a
t
o
f
o
r
ecas
t
f
u
t
u
r
e o
u
t
co
m
e
s
.
S
p
eci
f
i
cal
l
y
,
u
s
i
n
g
t
h
e r
at
e o
f
c
h
at
t
er
t
w
eet
s
f
r
o
m
t
h
e p
o
p
u
l
ar
s
i
t
e T
w
i
t
t
er
,
t
h
e
y
co
n
s
t
r
u
ct
ed
a l
i
n
ear
r
eg
r
es
s
i
o
n
m
o
d
el
f
o
r
pr
e
di
c
t
i
n
g
box
-
o
f
f
i
ce r
ev
e
n
u
e
s
o
f
m
o
v
i
e
s
i
n
ad
v
an
ce,
b
ef
o
r
e
t
h
e
y
w
er
e e
v
en
r
el
ea
s
ed
.
Y
ak
u
b
et
al
[
1
1
]
,
p
r
o
p
o
s
ed
an
ar
ch
i
t
ect
u
r
e t
h
at
u
s
es
a
m
u
l
t
i
d
i
m
en
s
i
o
n
al
m
o
d
el
t
o
i
n
t
eg
r
at
e cu
s
t
o
m
er
ch
ar
act
er
i
s
t
i
c
s
an
d
t
h
ei
r
co
m
m
en
t
s
ab
o
u
t
t
h
e
p
r
o
d
u
c
ts
o
r
s
e
r
v
ic
e
s
.
T
h
e
m
a
j
o
r
s
te
p
in
b
u
ild
in
g
t
h
is
a
r
c
h
ite
c
tu
r
e
w
a
s
co
n
v
er
t
i
n
g
co
m
m
en
t
s
(
o
p
i
n
i
o
n
s
)
i
n
t
o
a f
act
t
ab
l
e t
h
at
i
n
cl
u
d
ed
al
l
o
f
t
h
e d
et
ai
l
s
s
ep
ar
at
el
y
(
cu
s
t
o
m
er
s
,
p
r
o
d
u
ct
s
,
t
i
m
e an
d
l
o
cat
i
o
n
)
.
T
h
ey
d
i
d
a cas
e s
t
u
d
y
f
o
r
m
o
b
i
l
e p
h
o
n
es
an
d
p
r
es
e
nt
e
d
t
he
a
d
va
nt
a
ge
s
o
f
us
i
n
g
O
L
A
P
an
d
d
at
a cu
b
es
t
o
an
a
l
y
ze t
h
e c
u
s
t
o
m
er
s
’
o
p
i
n
i
o
n
.
I
n
[
1
2
]
,
t
h
ey
al
s
o
p
r
es
en
t
ed
t
h
e i
d
ea t
o
h
av
e a
co
m
p
r
e
h
en
s
i
v
e p
er
s
p
ect
i
v
e
o
f
cu
s
t
o
m
er
s
’
o
p
i
n
i
o
n
f
o
r
p
r
o
d
u
ct
s
o
f
d
i
f
f
er
en
t
cat
eg
o
r
i
es
an
d
u
s
ed
m
ul
t
i
di
m
e
ns
i
on
a
l
da
t
a
m
ode
l
t
o
f
o
r
m
a
l
i
ze t
h
e ar
ch
i
t
ect
u
r
e.
T
h
ey
al
s
o
p
r
es
e
n
t
ed
an
al
g
o
r
i
t
h
m
t
o
t
r
a
n
s
f
er
u
n
s
t
r
u
ct
u
r
ed
co
m
m
en
t
s
o
r
r
ev
i
e
w
s
i
n
t
o
a s
t
r
u
ct
u
r
ed
f
act
t
ab
l
e
.
P
i
ppa
l
e
t
a
l
[
13
]
,
w
or
k
e
d
on h
o
w
m
i
n
i
ng
s
oc
i
a
l
m
e
di
a
c
o
u
l
d be
u
s
e
d t
o
i
n
c
r
e
a
s
e
bus
i
ne
s
s
.
T
h
e
y
f
oc
us
e
d on
h
o
w
s
oc
i
a
l
m
e
di
a
w
or
ks
a
s
t
h
e
be
s
t
pl
a
t
f
or
m
f
or
c
om
pa
n
i
e
s
t
o
u
n
de
r
s
t
a
n
d t
h
e
l
i
k
e
s
a
n
d di
s
l
i
k
e
s
of
t
h
ei
r
c
u
s
t
o
m
er
s
a
n
d
t
h
e
i
r
r
eq
u
i
r
e
m
en
t
s
.
T
h
e
y
e
m
p
h
as
i
zed
o
n
d
i
f
f
er
e
n
t
d
at
a
m
i
n
i
n
g
ap
p
r
o
ach
es
,
w
h
i
c
h
ca
n
b
e
u
s
ed
o
n
s
o
ci
al
m
ed
i
a.
T
h
e
y
f
u
r
t
h
er
p
r
o
v
ed
t
h
at
s
o
ci
al
m
ed
i
a
i
s
t
h
e b
es
t
p
l
at
f
o
r
m
f
o
r
t
h
e c
o
m
p
a
n
i
es
t
o
g
at
h
er
i
n
f
o
r
m
at
i
o
n
ab
o
u
t
t
h
ei
r
p
r
o
d
u
ct
s
as
g
e
n
u
i
n
e r
ev
i
e
w
s
ar
e p
o
s
t
ed
b
y
t
h
ei
r
cu
s
t
o
m
er
s
.
T
h
e
y
f
i
n
al
l
y
s
t
at
ed
t
h
at
af
t
er
d
o
i
n
g
a
n
al
y
s
i
s
f
r
o
m
t
h
e d
at
a ex
t
r
act
ed
f
r
o
m
s
o
ci
al
m
ed
i
a,
cer
t
ai
n
h
i
d
d
en
f
act
o
r
s
ca
m
e
u
p
w
h
i
c
h
co
m
p
a
ni
e
s
ge
ne
r
a
l
l
y
d
o
no
t
no
t
i
c
e
b
ut
m
a
y ha
ve
a
s
i
g
ni
f
i
c
a
n
t
i
m
p
a
c
t
o
n t
he
p
r
o
d
uc
t
.
I
n [
1
4
]
,
t
he
a
ut
ho
r
f
o
c
u
s
e
d
o
n
b
us
i
ne
s
s
i
nt
e
l
l
i
ge
nc
e
a
nd
b
i
g
d
a
t
a
.
T
he
a
ut
ho
r
’
s
e
m
p
ha
s
i
s
l
i
e
s
m
a
i
nl
y
in
t
h
e
f
ie
ld
o
f
te
le
c
o
m
m
u
n
ic
a
tio
n
s
a
n
d
th
e
y
s
h
o
w
e
d
th
e
i
m
p
o
r
ta
n
c
e
o
f
b
ig
d
a
t
a
a
na
l
yt
i
c
s
.
T
he
i
r
w
o
r
k s
ho
w
s
t
h
at
m
ar
k
et
i
n
g
,
f
r
a
u
d
d
et
ect
i
o
n
an
d
c
u
s
t
o
m
er
r
el
at
i
o
n
s
h
i
p
m
an
a
g
e
m
e
n
t
can
b
e t
h
e p
r
i
m
ar
y
ap
p
l
i
cat
i
o
n
ar
eas
o
f
b
u
s
i
n
e
s
s
i
n
te
ll
ig
e
n
c
e
a
n
d
b
ig
d
a
ta
a
n
a
l
y
t
ic
s
.
T
h
e
a
u
t
h
o
r
a
l
s
o
s
ta
te
s
th
a
t th
e
in
c
r
e
a
s
in
g
i
n
te
r
e
s
t in
th
e
f
ie
ld
s
o
f
b
i
g
d
at
a a
n
al
y
t
i
cs
an
d
b
u
s
i
n
es
s
i
n
t
el
l
i
g
e
n
ce
w
i
l
l
k
eep
o
n
i
n
cr
eas
i
n
g
t
h
e e
f
f
ect
i
v
e
n
es
s
o
f
f
r
au
d
d
et
ect
i
o
n
an
d
c
u
s
to
m
e
r
r
e
la
tio
n
s
h
ip
m
a
n
a
g
e
m
e
n
t.
I
n
[
15]
,
t
h
e
a
u
t
h
or
s
h
a
v
e
s
t
udi
e
d t
h
e
i
m
por
t
a
n
c
e
of
da
t
a
m
i
n
i
ng
a
n
d i
t
s
i
m
por
t
a
n
c
e
i
n
i
n
dus
t
r
i
e
s
.
T
he
y
s
ho
w
ho
w
t
h
e i
n
d
u
s
t
r
i
es
ar
e u
s
i
n
g
d
at
a
m
i
n
i
n
g
t
ec
h
n
i
q
u
es
t
o
i
n
cr
eas
e r
e
v
en
u
e an
d
r
ed
u
ce co
s
t
s
.
T
h
e
y
h
av
e s
h
o
w
n
h
o
w
t
h
e d
at
a
m
i
n
i
n
g
t
ec
h
n
i
q
u
es
can
b
e u
s
ed
t
o
d
i
s
co
v
er
p
at
t
er
n
s
an
d
t
o
m
a
k
e b
et
t
er
d
eci
s
i
o
n
s
a
nd
s
t
r
a
t
e
gi
e
s
m
a
i
n
l
y i
n
t
he
r
e
t
a
i
l
s
e
c
t
o
r
.
T
he
y ha
ve
s
ho
w
n
h
o
w
d
at
a
m
i
n
i
n
g
t
ech
n
i
q
u
e
s
c
an
b
e b
en
e
f
i
ci
a
l
f
o
r
t
he
i
nd
us
t
r
i
e
s
t
o
ga
i
n a
nd
m
a
i
nt
a
i
n c
u
s
t
o
m
e
r
b
a
s
e
a
nd
b
ui
l
d
a
b
e
t
t
e
r
r
e
l
a
t
i
o
ns
h
i
p
.
T
he
y
a
l
s
o
s
ho
w
t
ha
t
us
i
n
g
d
at
a m
i
n
i
n
g
t
ech
n
i
q
u
es
t
h
e co
m
p
a
n
i
e
s
can
b
e
m
o
r
e co
m
p
et
i
t
i
v
e i
n
t
h
ei
r
f
i
el
d
s
.
I
n [
1
6
]
,
t
he
a
ut
ho
r
s
ha
ve
d
ug
d
e
e
p
i
nt
o
t
he
c
o
nt
i
n
uo
us
p
r
o
b
l
e
m
s
i
n t
he
m
o
b
i
l
e
i
nd
u
s
t
r
y
.
T
he
y
s
ho
w
t
h
e p
r
o
b
l
em
s
f
aced
b
y
co
m
p
a
n
i
es
t
o
s
t
a
y
co
m
p
et
i
t
i
v
e an
d
a
l
i
v
e i
n
t
h
e
m
ar
k
et
.
T
h
e au
t
h
o
r
s
p
r
o
p
o
s
e a s
et
o
f
f
eat
u
r
es
t
o
i
m
p
r
o
v
e
r
eco
g
n
i
t
i
o
n
r
at
e
o
f
p
o
s
s
i
b
l
e
c
h
an
g
e
s
i
n
t
h
e
m
ar
k
et
.
T
h
e
f
eat
u
r
es
w
er
e
ev
al
u
at
ed
u
s
i
n
g
N
aï
v
e B
a
y
es
a
n
d
B
a
y
es
i
a
n
N
et
w
o
r
k
d
at
a
m
i
n
i
n
g
al
g
o
r
i
t
h
m
s
an
d
t
h
e r
es
u
l
t
s
w
er
e co
m
p
ar
ed
w
i
t
h
a d
eci
s
i
o
n
t
r
ee al
g
o
r
i
t
h
m
.
T
h
e
y
w
er
e ab
l
e t
o
g
et
i
m
p
r
o
v
ed
p
r
ed
i
ct
i
o
n
r
at
es
u
s
i
n
g
al
l
t
h
e
m
o
d
el
s
.
T
h
ey
s
t
at
e t
h
at
m
o
b
i
l
e
in
d
u
s
tr
ie
s
s
h
ou
l
d us
e
c
u
s
t
o
m
e
r
c
h
u
r
n
pr
e
di
c
t
i
on
t
o c
u
t
v
a
r
i
ou
s
c
os
t
s
a
n
d pr
e
di
c
t
m
or
e
a
pp
r
opr
i
a
t
e
l
y
a
bou
t
t
h
e
cu
s
t
o
m
er
s
w
h
o
m
a
y
c
h
o
o
s
e t
o
l
eav
e.
T
h
ey
u
s
ed
r
an
k
i
n
g
t
o
cl
as
s
i
f
y
t
h
e f
eat
u
r
es
o
f
b
o
t
h
o
r
i
g
i
n
a
l
an
d
m
o
d
i
f
i
ed
d
at
as
et
t
o
g
ai
n
m
o
r
e i
n
f
o
r
m
at
i
o
n
ab
o
u
t
t
h
e ch
u
r
n
.
Evaluation Warning : The document was created with Spire.PDF for Python.
In
t
J
E
l
e
c
&
C
o
m
p
E
n
g
I
SSN
:
2088
-
8708
F
r
am
e
w
or
k
t
o A
nal
y
z
e
C
us
t
o
m
e
r
’
s
F
e
e
dbac
k
i
n Sm
ar
t
p
hon
e
I
ndus
t
r
y
…
(
M
ay
ank
G
upt
a
)
3319
I
n
[
17]
,
t
h
e
a
u
t
h
or
h
a
s
s
t
u
d
i
e
d a
bou
t
s
oc
i
a
l
m
e
di
a
m
i
n
i
n
g
a
n
d pu
t
f
or
w
a
r
d t
h
e
pr
obl
e
m
s
a
n
d
a
d
v
a
n
ta
g
e
s
r
e
la
te
d
to
it.
T
h
e
a
u
th
o
r
s
ta
te
s
th
a
t s
o
c
ia
l
m
e
d
ia
m
i
n
in
g
is
a
y
o
u
n
g
f
ie
ld
th
a
t is
y
e
t to
b
e
e
x
p
lo
r
e
d
pr
ope
r
l
y
t
o g
a
i
n g
ood a
n
d r
e
l
e
v
a
n
t
i
n
f
or
m
a
t
i
on f
r
o
m
a
h
u
g
e
d
at
as
et
.
T
h
e au
t
h
o
r
ex
p
l
ai
n
s
a
b
o
u
t
d
i
f
f
er
en
t
t
y
p
e
s
o
f
d
at
a p
r
es
e
n
t
i
n
t
h
e
s
o
ci
al
m
ed
i
a as
w
el
l
as
d
i
f
f
er
en
t
t
y
p
es
o
f
an
al
y
s
i
s
t
ech
n
i
q
u
e
s
w
h
i
ch
ca
n
b
e ap
p
l
i
ed
o
n
t
he
gi
ve
n
d
a
t
a
s
e
t
.
T
he
a
ut
ho
r
a
l
s
o
e
m
p
ha
s
i
z
e
d
o
n
ho
w
t
e
x
t
m
i
ni
n
g c
a
n
he
l
p
i
nd
u
s
t
r
i
e
s
t
o
ga
i
n
k
no
w
l
e
d
ge
a
b
o
u
t th
e
ir
c
u
s
to
m
e
r
s
.
I
n [
1
8
]
,
t
he
a
ut
ho
r
e
xp
l
a
i
n
s
t
he
i
nc
r
e
a
s
i
n
g us
a
ge
o
f
s
o
c
i
a
l
m
e
d
i
a
a
nd
e
xp
l
a
i
n
s
i
t
s
gr
o
w
t
h i
n f
ut
ur
e
.
A
ut
ho
r
gi
ve
s
a
n o
ve
r
vi
e
w
a
b
o
ut
s
o
c
i
a
l
m
e
d
i
a
m
i
ni
n
g a
nd
i
t
s
e
m
p
ha
s
i
s
o
n t
he
m
a
r
ke
t
i
n
t
he
up
c
o
m
i
n
g d
a
ys
.
A
ut
ho
r
ha
s
ex
p
r
es
s
ed
t
h
e
p
r
o
b
l
e
m
s
i
n
e
x
t
r
act
i
n
g
d
at
a
f
r
o
m
s
o
ci
al
m
ed
i
a s
i
n
ce t
h
e d
at
as
e
t
s
ar
e h
u
g
e.
A
u
t
h
o
r
a
l
s
o e
m
ph
a
s
i
z
e
d on
h
o
w
s
oc
i
a
l
m
e
di
a
c
a
n
be
us
e
d a
n
d be
m
or
e
pr
of
i
t
a
bl
e
i
n
m
a
r
k
e
t
i
ng
t
h
e
i
r
pr
odu
c
t
s
.
In
[1
9
-
20]
,
a
u
t
h
or
s
e
x
pl
a
i
ns
t
he
i
m
por
t
a
n
c
e
of
c
us
t
o
m
e
r
g
e
ne
r
a
t
e
d
c
o
nt
e
nt
i
n r
e
t
a
i
l
i
nd
us
t
r
y.
A
ut
ho
r
s
e
xp
l
a
i
n
ho
w
us
e
r
ge
ne
r
a
t
e
d
d
a
t
a
c
a
n b
e
us
e
f
u
l
f
o
r
m
a
k
i
n
g
o
p
i
ni
o
n u
s
i
ng
o
p
i
ni
o
n
m
i
ni
ng
t
e
c
h
ni
q
ue
s
.
T
he
y
f
ur
t
he
r
e
xp
l
a
i
n t
he
i
m
p
o
r
t
a
n
c
e
o
f
s
e
nt
i
m
e
nt
a
na
l
ys
i
s
f
o
r
m
a
k
i
n
g o
p
i
ni
o
ns
a
nd
m
a
ki
ng o
p
i
ni
o
n
-
m
i
ni
ng
m
ode
l
s
.
T
h
e
y
u
s
ed
d
i
f
f
er
e
n
t
cl
u
s
t
er
i
n
g
al
g
o
r
i
t
h
m
s
t
o
f
i
n
d
t
h
e
m
o
s
t
p
r
o
m
i
n
en
t
r
es
u
l
t
s
a
f
t
er
ex
t
r
act
i
n
g
d
at
a an
d
f
o
u
n
d
t
h
at
S
V
M
an
d
N
aï
v
e B
ay
es
g
i
v
e t
h
e b
es
t
r
es
u
l
t
s
.
In
[2
1
-
2
3
]
,
a
ut
ho
r
s
gi
ve
a
s
t
ud
y
o
n o
p
i
n
i
o
n
m
i
ni
n
g
a
nd
s
e
nt
i
m
e
n
t
a
na
l
ys
i
s
i
n p
a
r
t
i
c
ul
a
r
.
A
ut
ho
r
s
f
oc
us
o
n
ho
w
e
-
c
o
m
m
e
r
c
e
w
e
bs
i
t
e
s
c
a
n
be
us
e
f
u
l
f
or
opi
n
i
on
m
i
ni
ng
a
n
d s
t
a
t
e
t
h
r
e
e
l
e
v
e
l
s
of
opi
n
i
on
m
i
n
i
ng
as
d
o
cu
m
e
n
t
,
s
en
t
en
ce a
n
d
a
s
p
ect
l
ev
el
s
.
T
h
e
y
h
a
v
e s
t
u
d
i
ed
v
ar
i
o
u
s
a
l
g
o
r
i
t
h
m
s
i
n
t
h
e
f
i
el
d
o
f
s
e
n
t
i
m
en
t
a
na
l
ys
i
s
a
nd
d
i
s
c
us
s
e
d
t
he
c
ha
l
l
e
nge
s
a
nd
a
p
p
l
i
c
a
t
i
o
ns
.
I
n t
he
i
r
p
r
o
c
e
s
s
,
t
he
y
f
o
u
nd
s
up
e
r
vi
s
e
d
l
e
a
r
ni
n
g
ap
p
r
o
ach
es
t
o
b
e m
o
r
e s
u
i
t
ab
l
e
w
h
en
co
m
p
ar
ed
t
o
d
i
ct
i
o
n
ar
y
-
b
a
s
ed
ap
p
r
o
ach
es
.
2.
P
R
O
P
O
S
E
D
M
ETH
O
D
S
e
v
e
r
a
l r
e
s
e
a
r
c
h
s
t
u
d
ie
s
i
n
th
e
f
ie
ld
o
f
o
p
in
io
n
m
in
in
g
o
r
s
e
n
ti
m
e
n
t a
n
a
l
y
s
is
is
b
e
in
g
d
o
n
e
to
und
e
r
s
t
a
nd
t
he
s
e
nt
i
m
e
nt
s
o
f
c
us
t
o
m
e
r
s
b
u
t
t
he
y ha
ve
no
t
b
e
e
n a
b
l
e
t
o
s
uc
c
e
s
s
f
ul
l
y
f
i
nd
a
f
r
a
m
e
w
o
r
k,
w
h
i
c
h
can
b
e i
m
p
l
e
m
e
n
t
ed
t
o
g
i
v
e
ap
p
r
o
p
r
i
at
e r
es
u
l
t
s
.
W
e
pr
op
os
e
a
f
r
a
m
e
w
or
k
f
or
s
m
a
r
t
phon
e
i
n
dus
t
r
y
w
h
i
c
h
en
ab
l
es
i
t
s
u
s
er
s
t
o
u
n
d
er
s
t
an
d
t
h
e
pr
odu
c
t
s
ol
d
b
y
t
he
c
o
m
pa
ny
a
n
d i
t
s
cu
s
t
o
m
e
r
’
s
f
eed
b
ack
m
o
r
e
a
p
p
r
o
p
r
ia
te
ly
.
F
i
gu
r
e
1.
P
r
o
pos
e
d
f
ra
m
e
w
o
rk
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SSN
:
20
88
-
8708
In
t
J
E
l
e
c
&
C
o
m
p
E
n
g
,
V
o
l.
8
, N
o
.
5
,
O
c
t
obe
r
20
18
:
331
7
-
3
324
3320
T
he
f
r
a
m
e
w
o
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k p
r
o
vi
d
e
s
t
he
e
nd
us
e
r
s
t
o
s
t
o
r
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t
he
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r
d
a
t
a
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n t
he
f
r
a
m
e
w
o
r
k a
nd
t
he
n p
r
e
p
r
o
c
e
s
s
t
he
d
at
a acco
r
d
i
n
g
l
y
.
T
h
e f
r
a
m
e
w
o
r
k
f
et
c
h
es
t
h
e d
at
a,
an
d
a
f
t
er
p
r
ep
r
o
ces
s
i
n
g
,
i
t
g
i
v
e
s
t
h
e r
e
s
u
l
t
s
acco
r
d
i
n
g
t
o
t
he
d
a
t
a
,
w
hi
c
h c
a
n b
e
f
ur
t
he
r
us
e
d
f
o
r
a
na
l
y
z
i
n
g a
nd
m
a
ki
n
g d
e
c
i
s
i
o
n
s
i
n b
u
i
l
d
i
ng
f
ut
ur
e
p
r
o
d
uc
t
s
.
T
h
e f
r
a
m
e
w
o
r
k
co
l
l
ect
s
t
h
e
d
at
a i
n
t
o
i
t
s
d
at
ab
as
e an
d
p
er
f
o
r
m
s
t
h
e p
r
ep
r
o
ces
s
i
n
g
w
o
r
k
r
eq
u
i
r
ed
.
A
f
t
e
r
p
r
ep
r
o
ces
s
i
n
g
,
i
t
p
r
o
ces
s
es
t
h
e d
at
a an
d
p
r
o
v
i
d
es
t
h
e r
es
u
l
t
s
.
T
h
e r
es
u
l
t
s
ar
e i
n
t
h
e f
o
r
m
i
n
g
r
ap
h
i
ca
l
ch
ar
t
s
an
d
t
ab
u
l
ar
f
o
r
m
s
.
T
h
e r
es
u
l
t
s
o
f
p
r
o
d
u
ct
s
s
o
l
d
b
y
t
h
e
co
m
p
a
n
y
a
n
d
m
ar
k
et
s
h
ar
e r
ep
r
es
en
t
ed
g
r
ap
h
i
cal
l
y
.
T
h
i
s
f
r
a
m
e
w
or
k
a
l
s
o pr
ov
i
de
s
t
h
e
c
ou
nt
o
f
co
m
m
en
t
s
o
n
d
i
f
f
er
en
t
f
eat
u
r
es
o
f
t
h
e s
m
ar
t
p
h
o
n
e an
d
p
o
s
i
t
i
v
e a
s
w
e
l
l
a
s
ne
ga
t
i
ve
w
o
r
d
c
o
u
nt
s
p
r
e
s
e
nt
i
n t
he
r
e
vi
e
w
s
.
T
he
f
r
a
m
e
w
o
r
k a
l
s
o
p
r
o
vi
d
e
s
t
he
a
v
e
r
a
ge
r
a
t
i
n
g o
f
t
he
br
a
n
d or
p
r
odu
c
t
.
T
h
e
m
a
i
n
pu
r
pos
e
of
t
h
i
s
w
or
k
i
s
t
o pr
opos
e
a
f
r
a
m
e
w
or
k
f
or
c
o
m
p
a
ni
e
s
s
o
t
ha
t
t
he
y c
a
n
i
m
p
r
o
ve
t
h
e
i
r
pr
of
i
t
s
a
n
d r
e
du
c
e
t
h
e
g
a
p be
t
w
e
e
n
de
m
a
n
d a
n
d s
uppl
y
.
T
h
i
s
f
r
a
m
e
w
or
k
c
a
n
h
e
l
p t
h
e
c
o
m
pa
ny
t
o
i
m
pr
ov
e
t
h
e
s
a
l
e
s
of
t
h
e
i
r
u
pc
om
i
ng
pr
odu
c
t
s
.
T
h
e p
r
o
p
o
s
e
d
f
r
a
m
e
w
o
r
k
can
t
a
k
e t
h
e d
at
a
s
et
f
r
o
m
a
n
y
s
o
u
r
ce
f
r
o
m
t
h
e u
s
er
.
O
n
ce t
h
e d
at
as
et
i
s
e
n
t
er
ed
i
n
t
o
t
h
e d
at
as
et
t
h
e d
at
as
e
t
g
o
es
i
n
t
o
p
r
ep
r
o
ces
s
i
n
g
.
I
n
p
r
ep
r
o
ces
s
i
n
g
al
l
t
h
e
u
n
w
a
n
t
ed
d
at
a i
s
r
e
m
o
v
ed
b
ecau
s
e u
n
d
es
i
r
ed
d
at
a g
i
v
es
t
h
e
w
r
o
n
g
r
es
u
l
t
s
.
T
h
e
p
r
e
p
r
oc
e
s
s
e
d
d
a
t
a
t
he
n go
e
s
i
nt
o
t
he
p
r
o
c
e
s
s
i
ng t
o
c
he
c
k t
he
r
e
vi
e
w
s
.
.
T
h
e
r
e
s
ul
t
s
s
ho
w
t
he
p
o
s
i
t
i
ve
co
m
m
e
n
t
s
a
n
d
n
e
g
at
i
v
e co
m
m
en
t
s
ab
o
u
t
t
h
e
k
e
y
f
ea
t
u
r
es
o
f
t
h
e
s
m
ar
t
p
h
o
n
e.
T
h
en
b
as
ed
o
n
t
h
e d
at
as
e
t
p
r
ep
ar
e
d
t
h
e ch
ar
t
s
ar
e p
r
ep
ar
ed
g
r
ap
h
i
cal
l
y
w
h
i
c
h
s
h
o
w
t
h
e p
r
o
d
u
ct
s
s
o
l
d
b
y
eac
h
co
m
p
an
y
a
n
d
t
h
e
m
ar
k
et
s
ha
r
e
s
.
T
hi
s
e
na
b
l
e
s
t
he
co
m
p
an
i
es
t
o
m
ak
e t
h
e p
r
o
p
er
d
eci
s
i
o
n
s
f
o
r
f
u
t
u
r
e p
r
o
d
u
ct
s
.
3.
R
ES
U
LT
S
A
ND AN
AL
Y
S
I
S
3
.1
.
D
a
t
a
C
o
lle
c
t
io
n
F
o
r
cas
e s
t
u
d
y
,
t
h
e d
at
a
s
et
c
o
l
l
ect
ed
f
o
r
t
h
e
s
t
u
d
y
o
f
m
o
b
i
l
e i
n
d
u
s
t
r
y
w
as
o
f
s
m
ar
t
p
h
o
n
es
s
o
l
d
b
y
A
m
azo
n
i
n
t
h
e
y
ear
2
0
1
6
,
w
as
co
l
l
ect
ed
f
r
o
m
k
ag
g
l
e.
co
m
.
T
h
e d
at
as
et
co
n
s
i
s
t
ed
o
f
co
l
u
m
n
s
:
1
)
P
r
odu
c
t
N
a
me
,
2
)
B
r
a
n
d
N
a
me
,
3
)
P
ri
c
e
,
4
)
R
a
tin
g
s
,
5
)
R
ev
i
ew
s
,
6)
R
e
vi
e
w
vo
t
e
s
.
T
h
e
in
it
ia
l
d
a
ta
s
e
t c
o
n
s
i
s
te
d
o
f
m
or
e
t
h
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n
410,
000 r
ow
s
.
B
e
f
or
e
pr
oc
e
e
di
n
g
w
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t
h
a
n
a
l
y
s
i
s
,
i
t
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s
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m
por
t
a
n
t
t
o c
h
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t
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e
d
at
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s
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t
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e p
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ed
o
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eq
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e
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t
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o
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s
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e
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D
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t
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B
r
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e
P
ri
c
e
R
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g
R
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v
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R
ev
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V
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t
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A
cer
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.
1
3
.2
.
D
at
a
P
rep
ro
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s
i
n
g
P
r
ep
r
o
ces
s
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g
i
s
a
v
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y
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m
p
o
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t
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t
p
ar
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o
f
d
at
a an
a
l
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t
i
cs
.
P
r
ep
r
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s
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g
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s
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ed
g
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er
al
l
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t
o
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m
o
v
e u
n
w
a
n
t
ed
an
d
u
n
d
es
i
r
ed
d
at
a,
w
h
i
c
h
i
s
p
r
es
en
t
i
n
t
h
e d
at
as
et
[
2
4
]
.
I
t
i
s
v
er
y
i
m
p
o
r
t
an
t
b
ecau
s
e
und
e
s
i
r
e
d
d
a
t
a
g
i
ve
s
t
he
w
r
o
n
g r
e
s
ul
t
i
n a
na
l
yt
i
c
s
.
T
hi
s
i
s
o
n
e o
f
t
h
e
m
ai
n
r
eas
o
n
s
t
o
d
o
d
at
a p
r
ep
r
o
ces
s
i
n
g
.
F
i
r
s
t
l
y
,
w
e r
e
m
o
v
ed
t
h
e co
l
u
m
n
‘
R
ev
i
e
w
V
o
t
es
’
f
r
o
m
t
h
e d
at
as
et
s
i
n
ce
w
e ar
e n
o
t
d
eal
i
n
g
w
i
t
h
t
h
e
m
.
S
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n
d
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s
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I
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88
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8708
In
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,
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.
(
20
13)
.
I
nt
e
g
r
a
t
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on of
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o C
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he
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y
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r
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a T
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o
gy
,
1
1,
pp.
49
5
-
50
1.
[
1
2]
S
ha
r
m
a
,
R
.
,
N
i
g
a
m
,
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.
a
nd J
a
i
n,
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.
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14)
.
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pi
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ov
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13
-
2
1.
[
1
3]
P
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p
al
,
S
.
an
d
B
at
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.
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2
0
1
4
)
.
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at
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om
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Sc
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e
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2)
.
[
1
4]
J
os
e
ph,
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(
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01
3)
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a
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[
1
5]
Ra
m
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ri
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a
n
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r B.
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om
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E
n
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ng
,
5
(1
).
[
1
6]
K
i
r
u
i
, C
., H
o
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g
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L
.
,
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he
r
ui
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ot
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a
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i
r
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.
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20
13)
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1
0
(2
).
[
1
7]
Z
at
ar
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2
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at
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g R
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c
h
,
6(
7)
.
[
1
8]
C
.
A
g
g
a
r
w
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l.
(
2
0
1
1
)
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n
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tr
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D
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A
n
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ly
tic
s
,
Spr
i
n
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r
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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[
1
9]
S
i
ng
h,
P
.
a
nd S
ha
hi
d
H
us
a
i
n,
M
.
(
2
01
4)
.
M
e
t
h
od
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St
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O
f
O
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tim
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n
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nat
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on
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o
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l
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of
t
C
om
p
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g
,
5(
1)
,
p
p.
11
-
21.
[
2
0]
V
u
,
P
ho
ng
M
i
n
h,
e
t
a
l
.
"
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ool
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or
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a
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at
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30t
h I
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.
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E
E
E
,
20
15
.
[
2
1]
M
.
,
V
.
,
V
a
l
a
,
J
.
a
n
d B
a
l
a
ni
,
P
.
(
2
01
6)
.
A
S
ur
v
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y
on S
e
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na
l
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i
s
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l
g
or
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s
f
or
O
pi
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i
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nt
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i
o
nal
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our
n
al
of
C
om
p
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r
A
ppl
i
c
at
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ons
,
13
3(
9)
,
p
p.
7
-
11
.
[
2
2]
M
uha
m
m
a
d Z
uba
i
r
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s
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,
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of
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4,
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15
,
p
p 1
-
17.
[
2
3]
S
ne
k
a
,
G
.
,
a
nd C
.
T
.
V
i
d
hy
a
.
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l
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our
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d Sof
t
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r
i
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6.
2 (
2
01
6)
.
[
2
4]
A
l
e
s
s
i
a
D
’
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ndr
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a
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i
z
i
a
na
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uz
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ppr
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s
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ool
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ppl
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t
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ons
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or
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nt
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na
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i
s
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m
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t
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on’
,
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nt
e
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nat
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o
nal
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our
n
al
of
C
om
p
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e
r
A
ppl
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c
at
i
ons
(
09
75
–
88
87)
V
ol
um
e
125
–
N
o.
3,
S
e
pt
e
m
be
r
201
5
,
pp
2
6
-
33
.
Evaluation Warning : The document was created with Spire.PDF for Python.