Mathematics,
Journal Year:
2022,
Volume and Issue:
10(13), P. 2234 - 2234
Published: June 26, 2022
With
the
development
of
Internet
and
big
data,
more
consumer
behavior
data
are
used
in
different
forecasting
problems,
which
greatly
improve
performance
prediction.
As
main
travel
tool,
sales
automobiles
will
change
with
variations
market
external
environment.
Accurate
prediction
automobile
can
not
only
help
dealers
adjust
their
marketing
plans
dynamically
but
also
economy
transportation
sector
make
policy
decisions.
The
is
a
product
high
value
involvement,
its
purchase
decision
be
affected
by
own
attributes,
economy,
other
factors.
Furthermore,
sample
have
characteristics
various
sources,
great
complexity
large
volatility.
Therefore,
this
paper
uses
Support
Vector
Regression
(SVR)
model,
has
global
optimization,
simple
structure,
strong
generalization
abilities
suitable
for
multi-dimensional,
small
to
predict
monthly
automobiles.
In
addition,
parameters
optimized
Grey
Wolf
Optimizer
(GWO)
algorithm
accuracy.
First,
grey
correlation
analysis
method
analyze
determine
factors
that
affect
sales.
Second,
it
build
GWO-SVR
model.
Third,
experimental
carried
out
using
from
Suteng
Kaluola
Chinese
car
segment,
proposed
model
compared
four
commonly
methods.
results
show
best
mean
absolute
percentage
error
(MAPE)
root
square
(RMSE).
Finally,
some
management
implications
put
forward
reference.
Expert Systems with Applications,
Journal Year:
2022,
Volume and Issue:
212, P. 118840 - 118840
Published: Sept. 16, 2022
The
study
compares
the
forecasting
performance
of
grey
type
models,
represented
by
an
optimized
nonlinear
Bernoulli
model
(ONGBM),
a
with
particle
swarm
optimization
(NGBM-PSO),
and
standard
GM
classic
time
series
model,
Auto-Regressive
Integrated
Moving
Average
(ARIMA).
models
are
compared
based
on
simulations
energy
consumption
in
Brazil
India
at
aggregate
disaggregate
levels
from
1992
to
2019.
illustrates
picture
nexus
disaggregated
levels.
accuracy
is
using
measures
such
as
MAPE,
MSE,
RMSE,
normalized
RMSE.
Diebold-Mariano
test
findings
validates
ARIMA
(1,1,1),
(1,1),
ONGBM
(1,1)
NGBM
(1,1)-PSO
models'
equal
predictive
performance.
used
compute
forecast
combinations,
ensuring
smaller
errors
than
single
models.
Optimizing
two
algorithms
ensures
highest
efficiency
for
short
series.
results
allow
recommendation
use
short-term
combine
these
forecasts
(1,1,1)
practical
applications.