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atio
n
s
o
f
t
w
ar
e
ar
e
all
o
n
th
e
clo
u
d
(
w
eb
)
an
d
i
s
c
o
m
p
lete
l
y
o
v
er
s
ee
n
b
y
t
h
e
cl
o
u
d
ad
m
in
i
s
tr
atio
n
s
u
p
p
lier
i
n
cl
u
d
in
g
Ya
h
o
o
,
Go
o
g
le
a
n
d
s
o
f
o
r
th
.
T
h
e
c
u
s
to
m
er
g
ets
t
h
e
c
h
an
ce
to
u
tili
ze
th
e
p
r
o
d
u
ct
alo
n
e
a
n
d
ap
p
r
ec
iate
th
eir
ad
v
an
ta
g
es.
I
n
o
r
d
er
to
f
o
llo
w
th
e
p
r
o
ce
d
u
r
e,
th
e
ce
n
tr
al
s
er
v
er
s
al
w
a
y
s
h
av
e
to
b
r
o
ad
ca
s
t
th
e
r
eq
u
ir
e
m
en
t
w
h
ic
h
en
co
m
p
as
s
es a
h
u
g
e
a
m
o
u
n
t o
f
en
er
g
y
,
ea
c
h
an
d
ev
er
y
ti
m
e.
T
h
e
p
ap
er
is
d
iv
id
ed
i
n
to
f
iv
e
s
ec
tio
n
s
.
Star
tin
g
o
f
f
w
i
th
th
e
I
n
tr
o
d
u
ctio
n
o
f
th
e
r
esear
ch
,
d
escr
ib
ed
ab
o
v
e
an
d
f
o
llo
w
in
g
th
e
i
n
t
r
o
d
u
ctio
n
,
w
e
h
av
e
d
is
c
u
s
s
e
d
r
elate
d
w
o
r
k
w
it
h
p
r
o
b
lem
f
o
r
m
u
latio
n
a
n
d
co
n
tr
ib
u
tio
n
.
T
h
ir
d
s
ec
tio
n
i
n
clu
d
e
s
d
escr
ip
tio
n
o
f
m
et
h
o
d
o
lo
g
y
alo
n
g
w
it
h
t
h
e
ar
ch
it
ec
tu
r
e
o
f
p
r
o
p
o
s
e
d
s
o
lu
tio
n
w
h
er
ei
n
in
f
i
f
t
h
s
ec
tio
n
o
f
t
h
e
p
ap
er
th
er
e
is
a
d
ep
ictio
n
o
f
s
i
m
u
latio
n
r
es
u
lt
s
.
As
s
ta
ted
b
y
NI
ST
,
th
e
clo
u
d
f
r
a
m
e
w
o
r
k
is
m
ad
e
u
p
o
f
f
i
v
e
i
m
p
o
r
ta
n
t
f
ea
t
u
r
es
i
n
cl
u
d
in
g
:
On
-
De
m
a
n
d
Self
Ser
v
ice,
B
r
o
a
d
Net
w
o
r
k
A
cc
ess
,
R
eso
u
r
ce
P
o
o
lin
g
,
R
ap
id
E
last
icit
y
a
n
d
Me
asu
r
ed
Ser
v
ice
s
.
a.
On
-
d
e
m
a
n
d
s
elf
-
s
er
v
ice
:
T
h
e
u
s
er
s
ar
e
p
r
o
v
id
ed
b
y
th
e
o
n
e
-
s
id
ed
l
y
co
m
p
u
ti
n
g
ab
ilit
ies
li
k
e,
s
er
v
er
ti
m
e
in
ter
v
a
l a
n
d
n
et
w
o
r
k
s
to
r
ag
e
t
h
at
is
r
eq
u
ir
ed
.
b.
A
B
r
o
ad
n
et
w
o
r
k
ac
ce
s
s
:
C
o
m
p
e
ten
cie
s
ar
e
o
b
tain
ab
le
t
h
r
o
u
g
h
t
h
e
n
et
w
o
r
k
as
w
ell
as
h
an
d
led
b
y
u
s
i
n
g
cu
s
to
m
ar
y
m
ec
h
a
n
is
m
s
w
h
ic
h
also
s
ti
m
u
la
tes
b
y
m
ea
n
s
o
f
h
eter
o
g
e
n
eo
u
s
t
h
in
o
r
th
ick
u
s
er
s
ta
g
es
(
f
o
r
in
s
ta
n
ce
s
,
m
o
b
iles
,
lap
to
p
s
,
tab
lets
,
as
w
ell
as
w
o
r
k
p
lace
s
)
.
c.
R
eso
u
r
ce
p
o
o
lin
g
:
T
h
e
s
u
p
p
li
er
’
s
co
m
p
u
ti
n
g
ass
e
ts
ar
e
as
s
e
m
b
led
to
ass
i
s
t
n
u
m
er
o
u
s
u
s
er
s
u
til
izin
g
a
m
u
lti
-
te
n
an
t
f
r
a
m
e
w
o
r
k
t
h
r
o
u
g
h
d
i
s
s
i
m
ilar
p
h
y
s
ical
as
w
ell
as
s
i
m
u
lated
r
eso
u
r
ce
s
,
w
h
ic
h
ar
e
v
ig
o
r
o
u
s
l
y
al
lo
ca
ted
as
w
ell
a
s
r
ea
llo
ca
ted
as
p
er
th
e
u
s
er
’
s
r
eq
u
est.
T
h
er
e
is
an
in
tellect
o
f
p
o
s
itio
n
an
d
in
d
iv
id
u
alit
y
i
n
w
h
ich
,
th
e
u
s
er
s
g
e
n
er
al
h
as
n
o
co
n
tr
o
l
o
r
f
a
m
iliar
it
y
o
v
er
t
h
e
p
ar
ticu
lar
p
o
s
itio
n
o
f
t
h
e
o
f
f
er
ed
as
s
ets,
n
ev
er
t
h
ele
s
s
t
h
is
m
ig
h
t
b
e
co
m
p
ete
n
t
to
s
p
ec
if
y
p
o
s
itio
n
w
it
h
t
h
e
s
id
e
o
f
a
g
r
ea
ter
lev
e
l
o
f
ab
s
tr
ac
tio
n
(
f
o
r
ex
a
m
p
le
s
,
s
tate,
co
u
n
tr
y
,
o
r
in
f
o
r
m
a
tio
n
ce
n
ter
)
.
I
n
s
ta
n
ce
s
o
f
t
h
e
ass
et
s
co
m
p
r
is
e
o
f
m
e
m
o
r
y
,
s
to
r
ag
e
h
an
d
li
n
g
,
as w
ell
a
s
n
et
w
o
r
k
b
an
d
w
id
th
.
d.
R
ap
id
elastic
it
y
:
A
lt
h
o
u
g
h
t
h
e
co
m
p
eten
c
ies
ar
e
elastica
ll
y
d
eliv
er
ed
an
d
ar
e
u
n
co
n
f
i
n
ed
b
u
t,
s
t
ill,
t
h
er
e
a
r
e
s
o
m
e
ca
s
e
s
in
w
h
ic
h
t
h
e
m
ea
s
u
r
e
m
e
n
t
i
s
d
o
n
e
w
it
h
o
u
t
w
ar
d
as
w
e
ll
as
i
n
w
ar
d
s
p
r
o
p
o
r
tio
n
ate
v
ia
Clo
u
d
C
o
m
p
u
tin
g
Mu
lt
i
-
te
n
an
t s
o
lu
ti
o
n
p
r
o
v
id
ed
b
y
v
e
n
d
o
r
A
u
to
m
a
ted
b
ac
k
u
p
s
u
p
ti
m
e,
S
L
A
,
Ma
i
n
te
n
a
n
ce
Au
to
m
a
ted
u
p
g
r
ad
es
M
o
d
er
n
w
eb
b
ased
in
te
g
r
atio
n
W
eb
an
d
m
o
b
ile
-
ac
ce
s
s
f
r
o
m
an
y
w
h
er
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
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&
C
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m
p
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n
g
I
SS
N:
2088
-
8708
A
n
E
fficien
t Cl
o
u
d
S
c
h
ed
u
lin
g
A
lg
o
r
ith
m
fo
r
th
e
C
o
n
s
erva
tio
n
o
f E
n
erg
y
….
(
K
a
vita
A
r
ju
n
S
u
lta
n
p
u
r
e)
181
r
eq
u
est.
T
o
th
e
u
s
er
,
th
e
p
r
o
f
ic
ien
cies
o
b
tain
ab
le
f
o
r
p
r
o
v
is
io
n
in
g
f
r
eq
u
e
n
tl
y
,
s
ee
m
s
to
b
e
u
n
r
estricte
d
as
w
ell
a
s
co
u
ld
b
e
tak
e
n
in
a
n
y
k
in
d
o
f
m
a
g
n
itu
d
e
at
a
n
y
ti
m
e.
e.
Me
asu
r
ed
s
er
v
ice:
C
lo
u
d
f
r
a
m
e
w
o
r
k
s
m
ec
h
a
n
icall
y
co
n
tr
o
l
an
d
en
h
a
n
ce
r
eso
u
r
ce
u
tili
za
tio
n
t
h
r
o
u
g
h
lev
er
ag
i
n
g
a
m
e
ter
in
g
p
r
o
f
icie
n
c
y
o
n
r
o
u
n
d
ab
o
u
t so
m
e
p
ar
ti
cu
lar
lev
el
s
o
f
ab
s
tr
ac
tio
n
,
w
h
ich
is
s
u
itab
le
to
th
e
ca
teg
o
r
y
o
f
s
er
v
ices
(
f
o
r
ex
a
m
p
le,
h
a
n
d
lin
g
,
s
to
r
a
g
e,
b
an
d
w
id
th
,
as
w
ell
as
v
i
g
o
r
o
u
s
clie
n
t
ac
co
u
n
t
s
)
.
Ass
et
u
s
ag
e
co
u
ld
p
r
o
b
a
b
ly
b
e
e
x
a
m
in
ed
,
h
an
d
le
d
,
as
w
el
l a
s
te
s
ti
f
ied
,
p
r
o
v
id
ed
th
at
p
lacid
it
y
m
ea
n
t f
o
r
b
o
th
o
f
t
h
e
s
u
p
p
lier
s
an
d
cu
s
t
o
m
er
s
o
f
th
e
u
tili
ze
d
s
er
v
ices.
2
.
R
E
L
A
T
E
D
W
O
R
K
A
lo
ad
o
f
r
esear
ch
h
as
b
ee
n
d
o
n
e
in
th
e
f
ield
o
f
clo
u
d
co
m
p
u
tin
g
f
o
r
p
r
o
v
id
in
g
th
e
b
est
co
m
p
u
ti
n
g
r
eso
u
r
ce
s
as
s
er
v
ices
a
n
d
s
t
ill
is
p
r
o
v
id
in
g
a
g
r
ea
t
s
co
p
e
f
o
r
r
esear
ch
f
o
r
t
h
e
k
ee
n
r
ese
ar
ch
er
s
.
T
h
is
p
ap
er
f
o
cu
s
es
o
n
t
h
e
b
r
o
ad
ca
s
ti
n
g
i
s
s
u
e
r
elate
d
i
n
th
e
cl
o
u
d
co
m
p
u
ti
n
g
a
n
d
alo
n
g
w
it
h
t
h
at
also
f
o
c
u
s
e
s
o
n
t
h
e
ca
ch
e
co
n
ce
p
t
f
o
r
th
e
p
u
r
p
o
s
e
o
f
r
ed
u
ci
n
g
t
h
e
en
er
g
y
co
n
s
u
m
p
tio
n
.
T
h
e
m
ain
ar
ea
s
t
h
at
f
o
cu
s
i
n
t
h
is
w
o
r
k
ar
e
,
m
e
m
o
r
y
m
an
a
g
e
m
en
t,
co
m
p
lex
i
ties
a
s
w
el
l
as
a
ll
t
h
e
b
asic
s
er
v
ices.
Fo
llo
w
in
g
i
s
t
h
e
d
escr
ip
tio
n
o
f
th
e
w
o
r
k
s
th
a
t a
r
e
alr
ea
d
y
d
o
n
e
u
n
d
er
th
is
to
p
ic
b
y
d
if
f
er
e
n
t r
es
ea
r
ch
er
s
.
W
o
o
d
et.
al
[
1
]
,
p
r
esen
ted
th
e
is
s
u
e
o
f
s
ec
u
r
it
y
i
n
clo
u
d
co
m
p
u
tin
g
.
I
n
th
i
s
p
ap
er
,
s
ec
u
r
it
y
m
o
d
el
f
o
r
Saas
s
er
v
ice
h
a
s
b
ee
n
a
n
al
y
ze
d
b
y
t
h
e
au
th
o
r
.
W
an
g
et.
al
[
2
]
,
p
r
o
p
o
s
ed
th
e
co
s
t
m
o
d
el
in
clo
u
d
co
m
p
u
ti
n
g
b
ased
o
n
t
h
e
co
m
p
lex
it
y
-
a
war
e
d
y
n
a
m
ic
tas
k
o
p
ti
m
al
s
c
h
ed
u
li
n
g
al
g
o
r
ith
m
w
h
er
ein
San
d
ee
p
Ka
u
r
[
3
]
p
r
o
p
o
s
ed
th
e
tec
h
n
iq
u
e
b
ased
o
n
v
ir
tu
al
izatio
n
f
o
r
s
o
lv
i
n
g
th
e
p
r
o
b
le
m
o
f
s
tar
v
atio
n
d
u
r
in
g
VM
m
i
g
r
atio
n
.
T
o
r
ed
u
ce
th
e
m
e
m
o
r
y
s
ize,
v
i
r
tu
aliza
tio
n
is
a
o
n
e
o
f
t
h
e
g
o
o
d
co
n
ce
p
ts
.
Fro
m
r
es
u
lt
s
i
m
u
l
atio
n
s
p
r
ese
n
ted
i
n
th
is
p
ap
er
b
y
au
t
h
o
r
,
p
r
o
p
o
s
e
d
s
ch
e
m
e
co
m
es
o
u
t
to
b
e
b
etter
th
an
p
r
ev
io
u
s
m
et
h
o
d
s
.
Qin
g
li
n
g
et.
al
[
4
]
,
an
al
y
ze
d
th
r
ee
d
i
f
f
er
en
t
t
y
p
es
o
f
w
o
r
k
lo
ad
s
b
ased
o
n
v
ir
t
u
aliza
tio
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.
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e
m
ai
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p
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p
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m
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[
5
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p
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s
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f
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lt.
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ap
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eq
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f
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Evaluation Warning : The document was created with Spire.PDF for Python.
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tili
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.
W
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K
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ic
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.
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183
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r
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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:
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,
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1
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f
o
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tal
p
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m
ac
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r
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if
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f
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f
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5
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b
a
b
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p
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o
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is
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ig
h
el
s
e
it is
lo
w
.
4
.
1
.
B
r
o
a
d
c
a
s
t
i
n
g
o
f
t
h
e
R
eq
u
i
re
m
e
n
t
T
h
e
ce
n
tr
al
s
er
v
er
w
il
l
b
r
o
ad
c
ast
th
e
r
eq
u
ir
e
m
en
t
o
f
th
e
u
s
e
r
if
th
e
f
i
le
h
as
b
ee
n
d
e
m
an
d
e
d
f
o
r
th
e
f
ir
s
t
ti
m
e
an
d
t
h
er
e
is
n
o
in
f
o
r
m
ati
o
n
o
f
th
e
j
o
b
o
r
f
ile
in
to
th
e
ca
ch
e
m
e
m
o
r
y
o
f
th
e
n
et
w
o
r
k
.
T
h
e
ce
n
tr
al
s
er
v
er
w
il
l
k
ee
p
t
h
e
r
esp
o
n
s
e
s
f
r
o
m
th
e
p
h
y
s
ical
m
ac
h
i
n
e
an
d
will
ass
i
g
n
th
e
j
o
b
to
th
e
s
u
b
s
er
v
er
as
p
er
th
eir
r
esp
o
n
s
es a
n
d
th
e
m
in
i
m
u
m
c
o
s
tin
g
to
co
m
p
lete
th
e
j
o
b
.
T
h
e
m
ath
e
m
at
ical
ex
p
r
ess
io
n
is
a
s
f
o
ll
o
w
s
.
4
.
2
.
C
a
ch
i
n
g
T
h
e
ca
ch
in
g
co
n
ce
p
t
m
ak
e
s
th
e
ex
ec
u
tio
n
q
u
ite
f
a
s
t
an
d
h
an
d
y
.
A
s
e
x
p
lain
ed
in
t
h
e
b
r
o
a
d
ca
s
t
s
ec
tio
n
th
at
t
h
e
j
o
b
w
as
as
s
ig
n
ed
to
th
e
s
u
b
s
er
v
er
.
No
w
,
t
h
is
in
f
o
r
m
a
tio
n
w
ill
b
e
s
to
r
ed
in
to
th
e
ca
ch
e
m
e
m
o
r
y
a
n
d
w
h
e
n
s
o
ev
er
an
y
o
t
h
er
w
it
h
s
a
m
e
k
i
n
d
o
f
f
ile
d
em
a
n
d
o
r
a
j
o
b
w
it
h
s
a
m
e
f
r
eq
u
en
c
y
o
cc
u
r
s
i
n
th
e
r
eg
io
n
,
th
e
n
,
af
ter
th
e
f
e
ed
b
ac
k
ev
alu
atio
n
,
th
e
j
o
b
ca
n
b
e
d
ir
ec
tly
as
s
ig
n
ed
to
s
er
v
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w
it
h
o
u
t
w
a
s
ti
n
g
t
h
e
en
er
g
y
o
f
th
e
b
r
o
ad
ca
s
t.
// R
eq
u
ir
e
m
en
t o
f
t
h
e
f
ile
h
as
b
ee
n
m
ad
e
f
o
r
th
e
f
ir
s
t t
i
m
e.
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:
2088
-
8708
A
n
E
fficien
t Cl
o
u
d
S
c
h
ed
u
lin
g
A
lg
o
r
ith
m
fo
r
th
e
C
o
n
s
erva
tio
n
o
f E
n
erg
y
….
(
K
a
vita
A
r
ju
n
S
u
lta
n
p
u
r
e)
185
I
f
,
t
h
e
r
eq
u
ir
e
m
en
t
is
an
a
l
y
ze
d
as 1
t
h
e
n
,
s
u
c
h
r
eq
u
ir
e
m
en
t a
r
e
d
e
m
an
d
ed
f
o
r
th
e
f
ir
s
t t
i
m
e
th
en
t
h
er
e
w
o
u
ld
b
e
a
b
r
o
a
d
ca
s
t.
T
h
e
b
r
o
ad
ca
s
t
w
ill
r
et
u
r
n
th
e
r
esp
o
n
s
e
o
f
th
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s
u
b
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v
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s
o
u
t
o
f
w
h
ic
h
th
e
b
est
s
u
itab
le
s
er
v
er
w
o
u
ld
b
e
s
elec
ted
b
ase
d
o
n
th
e
co
s
t
ef
f
icie
n
c
y
a
n
d
th
e
f
ile
t
y
p
e
a
n
d
th
e
s
u
b
s
er
v
e
r
s
d
etails
w
o
u
ld
b
e
s
to
r
ed
in
th
e
ca
ch
e
m
e
m
o
r
y
f
o
r
f
u
r
t
h
er
d
etailin
g
.
4
.
3
.
Th
e
F
e
ed
b
a
c
k
T
e
r
m
i
n
o
l
o
g
y
T
h
e
Feed
b
ac
k
ter
m
i
n
o
lo
g
y
h
e
lp
s
th
e
ce
n
tr
al
s
er
v
er
to
ch
o
o
s
e
th
e
b
est
s
u
b
s
er
v
er
f
o
r
an
y
j
o
b
.
A
f
ter
th
e
b
r
o
ad
ca
s
t
p
h
ase
w
h
e
n
th
e
s
u
b
s
er
v
er
in
f
o
r
m
a
tio
n
is
s
to
r
ed
in
th
e
ca
ch
e,
th
e
ce
n
tr
al
s
er
v
er
w
o
u
ld
p
u
t
a
f
ee
d
b
ac
k
b
ased
o
n
th
e
co
m
p
l
etio
n
ti
m
e
a
n
d
en
er
g
y
co
n
s
u
m
e
d
in
th
e
co
m
p
letio
n
o
f
t
h
e
j
o
b
.
I
f
th
er
e
ar
e
m
o
r
e
th
an
o
n
e
s
u
b
s
er
v
er
f
o
r
th
e
s
a
m
e
j
o
b
,
th
en
b
ased
o
n
t
h
e
f
ee
d
b
ac
k
it
is
ea
s
y
to
s
elec
t
w
h
ic
h
s
u
b
s
er
v
er
w
o
u
ld
b
e
b
est f
o
r
th
e
j
o
b
.
∑
∑
5
.
E
X
P
E
R
I
M
E
N
T
A
L
R
E
S
U
L
T
S
T
h
is
s
ec
tio
n
e
x
p
lai
n
s
t
h
e
e
x
p
er
im
e
n
tal
r
e
s
u
l
ts
b
y
co
n
s
id
e
r
in
g
t
h
e
n
u
m
b
er
o
f
p
ar
a
m
e
te
r
s
th
at
ar
e
d
elay
,
C
P
U
m
i
s
-
u
t
ilizatio
n
,
en
er
g
y
co
n
s
u
m
p
tio
n
an
d
d
ela
y
w
ith
r
esp
ec
t
to
th
e
n
u
m
b
er
o
f
u
s
er
s
.
T
h
e
co
m
p
ar
is
o
n
o
f
all
t
h
ese
p
ar
a
m
eter
s
is
co
m
p
u
ted
w
i
th
t
h
e
n
u
m
b
er
o
f
u
s
er
s
.
Fig
u
r
e
3
s
h
o
w
s
co
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p
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is
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n
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d
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p
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Dela
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o
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b
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4
2
m
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f
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w
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o
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t b
r
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g
is
3
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m
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.
Fig
u
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4
s
h
o
w
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co
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p
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is
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n
f
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g
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
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0
8
8
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r
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8
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5.
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r
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6.
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User
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P
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Fig
u
r
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s
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p
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.
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.
Yield
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec
&
C
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m
p
E
n
g
I
SS
N:
2088
-
8708
A
n
E
fficien
t Cl
o
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d
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c
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u
lin
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A
lg
o
r
ith
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fo
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tio
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(
K
a
vita
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u
lta
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r
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187
f
ac
to
r
in
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w
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tech
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iq
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v
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elay
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ith
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1
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6
.
C
O
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On
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task
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te
to
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R
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[
1
]
W
o
o
d
,
Katie,
an
d
Ma
r
k
An
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o
n
,
"
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d
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C
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2
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[
2
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W
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tas
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ased
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5
.
[
3
]
Kau
r
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Sa
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d
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p
,
"
Me
m
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Me
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Min
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:
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Memo
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v
o
l 6
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,
2
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.
[
4
]
W
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g
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Qi
n
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an
d
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s
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.
Var
ela,
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mp
a
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virt
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klo
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y
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C
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p
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(
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C
)
,
2
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Fo
u
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[
5
]
R
an
i,
Di
m
p
i,
an
d
R
aj
iv
Ku
m
ar
R
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j
an
,
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co
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R
esea
r
ch
in
C
o
mp
u
ter
S
cien
ce
a
n
d
S
o
ftw
a
r
e
E
n
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in
ee
r
in
g
,
4
.
6
(
2
0
1
4
)
: 4
5
8
-
461.
[
6
]
C
h
e
n
,
Yize
n
g
,
Xi
n
g
u
i
L
i,
a
n
d
Fan
g
n
in
g
C
h
e
n
,
"
Ove
r
view
a
n
d
a
n
a
lysi
s
o
f c
lo
u
d
co
mp
u
tin
g
r
esea
r
ch
a
n
d
a
p
p
lica
tio
n
,
"
E
-
B
u
s
in
e
s
s
a
n
d
E
-
Go
v
er
n
m
e
n
t (
I
C
E
E
)
,
2
0
1
1
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n
ter
n
at
io
n
al
C
o
n
f
er
en
ce
o
n
.
I
E
E
E
,
2
0
1
1
.
[
7
]
L
iao
L
i,
Z
h
a
n
g
T
ao
,
“
T
h
e
Dev
elo
p
m
en
t
o
f
C
lo
u
d
C
o
m
p
u
ti
n
g
,
”
I
n
fo
r
ma
tio
n
Tech
n
o
lo
g
y
,
2
0
1
0
,
p
p
8
6
-
9
3
.
[
8
]
C
h
e
n
Ka
n
g
,
Z
h
en
g
W
ei
-
Min
,
“Cl
o
u
d
C
o
m
p
u
ti
n
g
:
S
y
s
te
m
I
n
s
ta
n
ce
s
a
n
d
C
u
r
r
en
t
R
esear
c
h
,
”
Jo
u
r
n
a
l
o
f
S
o
ftw
a
r
e
,
v
o
l.
5
,
2
0
0
9
,
p
p
.
1
3
3
7
-
1348.
[
9
]
Mo
h
a
m
ed
Ma
g
d
y
Mo
s
b
ah
,
“C
u
r
r
en
t
Ser
v
ices
i
n
C
lo
u
d
C
o
m
p
u
tin
g
:
A
S
u
r
v
e
y
,
”
I
n
tern
a
tio
n
a
l
Jo
u
r
n
a
l
o
f
C
o
mp
u
ter S
cien
ce
,
E
n
g
i
n
ee
r
in
g
a
n
d
I
n
fo
r
ma
tio
n
Tech
n
o
lo
g
y
(
I
JCS
E
I
T)
,
Vo
l.3
,
No
.
5
,
Octo
b
er
2
0
1
3
.
[
1
0
]
Yan
g
,
J
ian
f
e
n
g
,
an
d
Z
h
ib
in
C
h
e
n
,
"
C
lo
u
d
co
mp
u
tin
g
r
esea
r
ch
a
n
d
s
ec
u
r
ity
is
s
u
es,
"
C
o
m
p
u
tatio
n
al
in
telli
g
e
n
ce
an
d
s
o
f
t
w
ar
e
en
g
i
n
ee
r
in
g
(
C
i
SE)
,
2
0
1
0
in
ter
n
ati
o
n
al
co
n
f
er
e
n
ce
o
n
.
I
E
E
E
,
2
0
1
0
.
[
1
1
]
C
h
u
a
n
g
,
I
-
Hs
u
n
,
et
a
l.,
"
A
n
effec
tive
p
r
iva
cy
p
r
o
tect
io
n
s
ch
em
e
fo
r
clo
u
d
co
mp
u
tin
g
,
"
A
d
v
an
ce
d
C
o
m
m
u
n
ica
tio
n
T
ec
h
n
o
lo
g
y
(
I
C
A
C
T
)
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2
0
1
1
1
3
th
I
n
ter
n
atio
n
al
C
o
n
f
er
e
n
ce
o
n
.
I
E
E
E
,
2
0
1
1
.
[
1
2
]
A
z
h
ad
,
S
y
ed
,
an
d
Mr
Sri
n
i
v
as
R
ao
,
"
E
n
s
u
r
in
g
Da
ta
S
to
r
a
g
e
S
ec
u
r
ity
in
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lo
u
d
C
o
mp
u
tin
g
,
"
I
n
P
r
o
ce
e
d
in
g
s
o
f
Natio
n
al
C
o
n
f
er
en
ce
o
n
C
o
m
p
u
ti
n
g
C
o
n
ce
p
ts
i
n
C
u
r
r
en
t
T
r
en
d
s
,
I
n
d
ia,
p
p
.
3
1
0
-
3
1
3
.
2011.
[
1
3
]
J
ain
,
A
.
,
Mi
s
h
r
a,
M.
K.
,
P
ed
d
o
j
u
,
S.
K.
,
&
J
ain
,
N,
“En
erg
y
efficien
t
co
mp
u
tin
g
-
g
r
ee
n
clo
u
d
co
mp
u
tin
g
,
”
I
n
E
n
er
g
y
E
f
f
icie
n
t T
ec
h
n
o
lo
g
ie
s
f
o
r
Su
s
tai
n
ab
i
lit
y
(
I
C
E
E
T
S),
I
E
E
E
,
2
0
1
3
,
p
p
.
9
7
8
-
982.
[
1
4
]
Yea
n
f
-
Fu
W
e
n
,
“On
E
n
erg
y
E
fficien
cy
Da
ta
A
cc
ess
a
n
d
B
a
ck
u
p
fo
r
C
lo
u
d
C
o
mp
u
tin
g
N
etw
o
r
ks,”
Gr
ee
n
C
o
m
p
u
ti
n
g
a
n
d
C
o
m
m
u
n
icatio
n
s
(
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ee
n
C
o
m
)
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2
0
1
3
I
E
E
E
an
d
I
n
ter
n
et
o
f
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g
s
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in
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s
/C
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o
m
)
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E
E
I
n
ter
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o
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d
I
E
E
E
C
y
b
er
,
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h
y
s
ic
al
an
d
So
cial
C
o
m
p
u
tin
g
,
2
0
-
2
3
Au
g
.
2
0
1
3
,
p
p
.
1
3
6
9
–
1
3
7
4
.
[
1
5
]
R
id
d
h
i
P
atel,
Hit
u
l
P
atel,
Sa
n
j
ay
P
atel,
“
Q
u
alit
y
o
f
Ser
v
i
ce
B
ased
E
f
f
icie
n
t
R
eso
u
r
ce
A
llo
ca
tio
n
i
n
C
lo
u
d
C
o
m
p
u
ti
n
g
,
”
I
n
tern
a
tio
n
a
l
Jo
u
r
n
a
l
fo
r
Tech
n
o
lo
g
ica
l
R
esea
r
ch
i
n
E
n
g
in
ee
r
in
g
,
v
o
l.
2
,
is
s
u
e
9
,
2015.
[
1
6
]
Ash
k
a
n
P
ay
a
a
n
d
Dan
C
.
Ma
r
in
esc
u
,
“En
erg
y
-
a
w
a
r
e
Lo
a
d
B
a
la
n
cin
g
a
n
d
A
p
p
lica
tio
n
S
ca
lin
g
fo
r
th
e
C
lo
u
d
E
co
s
ystem,
”
in
C
lo
u
d
C
o
m
p
u
tin
g
,
I
E
E
E
T
r
an
s
ac
tio
n
s
o
n
2
0
1
5
,
v
o
l 9
9
,
p
p
1
-
1.
[
1
7
]
F.
Sato
h
,
H.
Yan
ag
i
s
a
w
a,
H.
T
ak
ah
ash
i
a
n
d
T
.
Ku
s
h
id
a,
“
T
o
ta
l
E
n
erg
y
Ma
n
a
g
eme
n
t
s
ystem
fo
r
C
lo
u
d
C
o
mp
u
tin
g
,
”
P
r
o
ce
e
d
in
g
s
o
f
t
h
e
I
E
E
E
I
n
ter
n
atio
n
a
l Co
n
f
er
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ce
o
f
t
h
e
C
lo
u
d
E
n
g
i
n
ee
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i
n
g
(
I
C
2
E
)
,
2
0
1
3
,
Ma
r
ch
2
5
-
2
7
; Red
w
o
o
d
C
it
y
,
C
A
.
[
1
8
]
S.
Srik
an
ta
iah
,
A
.
Kan
s
al,
an
d
F.
Z
h
ao
,
“
E
n
er
g
y
a
w
ar
e
co
n
s
o
lid
atio
n
f
o
r
clo
u
d
co
m
p
u
tin
g
,
”
C
lu
s
ter
C
o
mp
u
tin
g
,
v
o
l.
1
2
,
p
p
.
1
–
1
5
,
2
0
0
9
.
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.
8
,
No
.
1
,
Feb
r
u
ar
y
201
8
:
1
7
9
–
1
8
8
188
[
1
9
]
An
to
n
B
elo
g
lazo
v
et
al,
“En
erg
y
E
fficien
t
A
llo
ca
tio
n
o
f
V
ir
tu
a
l
Ma
ch
in
es
in
C
lo
u
d
Da
ta
C
en
ters
”
,
2
0
1
0
1
0
th
I
E
E
E
/A
C
M
I
n
ter
n
a
tio
n
al
C
o
n
f
er
e
n
ce
o
n
C
l
u
s
ter
,
C
lo
u
d
an
d
Gr
id
C
o
m
p
u
ti
n
g
.
[
2
0
]
Sh
aile
s
h
S.
Deo
r
e
et
al,
“
E
n
er
g
y
-
E
f
f
icien
t
J
o
b
Sc
h
ed
u
lin
g
a
n
d
A
l
lo
ca
tio
n
Sc
h
e
m
e
f
o
r
Vir
tu
al
Ma
c
h
in
e
s
in
P
r
iv
ate
C
lo
u
d
s
,
”
I
n
tern
a
tio
n
a
l
Jo
u
r
n
a
l
o
f
A
p
p
lied
I
n
f
o
r
ma
tio
n
S
ystems
(
I
JA
I
S
)
–
I
SS
N
:
2
2
4
9
-
0
8
6
8
Fo
u
n
d
atio
n
o
f
C
o
m
p
u
ter
Scie
n
ce
FC
S,
Ne
w
Yo
r
k
,
US
A
v
o
l
5
,
n
o
.
1
,
J
an
u
ar
y
2
0
1
3
.
[
2
1
]
Ma
,
W
en
q
in
g
,
an
d
J
in
g
Z
h
a
n
g
,
"
Th
e
s
u
r
ve
y
a
n
d
r
esea
r
ch
o
n
a
p
p
lica
tio
n
o
f
clo
u
d
co
mp
u
tin
g
,
"
I
n
C
o
m
p
u
ter
Scie
n
ce
&
E
d
u
ca
ti
o
n
(
I
C
C
SE)
,
2
0
1
2
,
7
th
I
n
ter
n
atio
n
al
C
o
n
f
er
en
ce
o
n
,
p
p
.
2
0
3
-
2
0
6
.
I
E
E
E
,
2012.
[
2
2
]
Hen
g
lian
g
,
Sh
i,
B
ai
Gu
a
n
g
y
i,
L
i
u
Z
h
o
n
g
h
u
a,
a
n
d
T
an
g
Z
h
en
m
in
,
"
C
o
mp
lex
ta
s
k
q
u
ery
b
a
s
ed
o
n
clo
u
d
co
mp
u
tin
g
R
eso
u
r
ce
:
I
mp
r
o
ve
d
a
p
p
r
o
xima
te
s
ky
lin
e
a
lg
o
r
ith
m,
"
I
n
I
n
f
o
r
m
atio
n
Scien
ce
an
d
E
n
g
i
n
ee
r
i
n
g
(
I
C
I
SE)
,
2
0
1
0
2
n
d
I
n
ter
n
atio
n
al
C
o
n
f
er
en
ce
o
n
,
p
p
.
1
0
9
3
-
1
0
9
6
.
I
E
E
E
.
Evaluation Warning : The document was created with Spire.PDF for Python.