Computer Modeling in Engineering & Sciences,
Год журнала:
2020,
Номер
125(2), С. 815 - 828
Опубликована: Янв. 1, 2020
The
modeling
and
risk
assessment
of
a
pandemic
phenomenon
such
as
COVID-19
is
an
important
complicated
issue
in
epidemiology,
attempt
great
interest
for
public
health
decision-making.
To
this
end,
the
present
study,
based
on
recent
heuristic
algorithm
proposed
by
authors,
time
evolution
investigated
six
different
countries/states,
namely
New
York,
California,
USA,
Iran,
Sweden
UK.
number
COVID-19-related
deaths
used
to
develop
model
it
believed
that
predicted
daily
each
country/state
includes
information
about
quality
system
area,
age
distribution
population,
geographical
environmental
factors
well
other
conditions.
Based
derived
epidemic
curves,
new
3D-epidemic
surface
assess
at
any
its
evolution.
This
research
highlights
potential
tool
which
can
assist
COVID-19.
Mapping
development
through
revealing
dynamic
nature
differences
similarities
among
districts.
Cleaner Engineering and Technology,
Год журнала:
2023,
Номер
15, С. 100661 - 100661
Опубликована: Июль 20, 2023
Significant
efforts
have
been
made
to
improve
the
strength
of
concrete
by
utilizing
industrial
waste
like
Fly
Ash
as
a
partial
replacement
cement
in
concrete.
However,
predicting
compressive
is
one
challenging
tasks
since
it
affected
several
factors
such
shape
and
size
aggregates,
water-cement
ratio.
The
paper
presents
study
on
various
investigation
machine
learning
(ML)
algorithms
estimate
(CS)
containing
fly
ash
(FA).
research
also
aims
compare
accuracy
different
ML
models,
including
non-ensemble
models
(Multiple
Linear
Regressor,
Support
Vector
Regressor)
ensemble
(AdaBoost
Random
Forest
Regression,
XGBoost
Bagging
Regressor),
CS
with
focus
identifying
most
accurate
estimation
method.
For
this
purpose,
dataset
633
experimental
results
wide
range
values,
ranging
from
6.27
MPa
79.99
MPa,
was
collected
existing
literature
validated
using
statistical
analysis.
primary
input
parameters
for
included
quantities
cement,
fine
aggregate
(FA),
coarse
aggregates
(CA),
water
content,
percentage
superplasticizer,
curing
days,
output.
Performance
evaluation
conducted
performance
indices,
MAE,
MSE,
R2,
MAPE,
RMSE,
a20-index,
assess
reliability.
comparison
reveals
that
Regressor
reliable
model,
demonstrating
highest
coefficient
determination
(R2)
0.95,
a-20
index
0.913,
lowest
RMSE
value
3.06
MAE
2.13
while
Multiple
LR
model
least
method
R2
equal
0.52,
0.433,
9.40
7.68
MPa.
Additionally,
provide
deeper
insights
into
relationship
between
CS,
sensitivity
parametric
analysis
were
employed,
enabling
comprehensive
understanding
impact
other
prediction.
From
study,
observed
age
essential
feature,
followed
water,
information
gain
values
32.91,
23.50,
15.10,
respectively.
highlights
effectiveness
techniques,
particularly
accurately
estimating
Furthermore,
offers
researchers
faster
more
cost-effective
means
evaluating
effect
estimation,
avoiding
need
time-consuming
costly
studies.
Case Studies in Construction Materials,
Год журнала:
2024,
Номер
20, С. e02901 - e02901
Опубликована: Янв. 19, 2024
The
construction
sector
is
a
major
contributor
to
global
greenhouse
gas
emissions.
Using
recycled
and
waste
materials
in
concrete
practical
solution
address
environmental
challenges.
Currently,
agricultural
widely
used
as
substitute
for
cement
the
production
of
eco-friendly
concrete.
However,
traditional
methods
assessing
strength
such
are
both
expensive
time-consuming.
Therefore,
this
study
uses
machine
learning
techniques
develop
prediction
models
compressive
(CS)
rice
husk
ash
(RHA)
ML
present
include
random
forest
(RF),
light
gradient
boosting
(LightGBM),
ridge
regression,
extreme
(XGBoost).
A
total
348
values
CS
were
collected
from
experimental
studies,
five
characteristics
RHA
taken
input
variables.
For
performance
assessment
models,
multiple
statistical
metrics
used.
During
training
phase,
correlation
coefficients
(R)
obtained
RF,
XGBoost,
LightGBM
0.943,
0.981,
0.985,
0.996,
respectively.
In
testing
set,
these
demonstrated
even
higher
performance,
with
0.971,
0.993,
0.992,
0.998
LightGBM,
analysis
revealed
that
model
outperformed
other
whereas
regression
exhibited
comparatively
lower
accuracy.
SHapley
Additive
exPlanation
(SHAP)
method
was
employed
interpretability
developed
model.
SHAP
water-to-cement
controlling
parameter
estimating
conclusion,
provides
valuable
guidance
builders
researchers
estimate
it
suggested
more
variables
be
incorporated
hybrid
utilized
further
enhance
reliability
precision
models.
Buildings,
Год журнала:
2024,
Номер
14(3), С. 591 - 591
Опубликована: Фев. 22, 2024
Landscape
geopolymer
concrete
(GePoCo)
with
environmentally
friendly
production
methods
not
only
has
a
stable
structure
but
can
also
effectively
reduce
environmental
damage.
Nevertheless,
GePoCo
poses
challenges
its
intricate
cementitious
matrix
and
vague
mix
design,
where
the
components
their
relative
amounts
influence
compressive
strength.
In
response
to
these
challenges,
application
of
accurate
applicable
soft
computing
techniques
becomes
imperative
for
predicting
strength
such
composite
matrix.
This
research
aimed
predict
using
waste
resources
through
novel
ensemble
ML
algorithm.
The
dataset
comprised
156
statistical
samples,
15
variables
were
selected
prediction.
model
employed
combination
RF,
GWO
algorithm,
XGBoost.
A
stacking
strategy
was
implemented
by
developing
multiple
RF
models
different
hyperparameters,
combining
outcome
predictions
into
new
dataset,
subsequently
XGBoost
model,
termed
RF–XGBoost
model.
To
enhance
accuracy
errors,
algorithm
optimized
hyperparameters
resulting
in
RF–GWO–XGBoost
proposed
compared
stand-alone
models,
hybrid
GWO–XGBoost
system.
results
demonstrated
significant
performance
improvement
strategies,
particularly
assistance
exhibited
better
effectiveness,
an
RMSE
1.712
3.485,
R2
0.983
0.981.
contrast,
(RF
XGBoost)
lower
performance.
Buildings,
Год журнала:
2024,
Номер
14(2), С. 396 - 396
Опубликована: Фев. 1, 2024
Fiber-reinforced
nano-silica
concrete
(FrRNSC)
was
applied
to
a
sculpture
address
the
issue
of
brittle
fracture,
and
primary
objective
this
study
explore
potential
hybridizing
Grey
Wolf
Optimizer
(GWO)
with
four
robust
intelligent
ensemble
learning
techniques,
namely
XGBoost,
LightGBM,
AdaBoost,
CatBoost,
anticipate
compressive
strength
fiber-reinforced
for
sculptural
elements.
The
optimization
hyperparameters
these
techniques
performed
using
GWO
metaheuristic
algorithm,
enhancing
accuracy
through
creation
hybrid
models:
GWO-XGBoost,
GWO-LightGBM,
GWO-AdaBoost,
GWO-CatBoost.
A
comparative
analysis
conducted
between
results
obtained
from
models
their
conventional
counterparts.
evaluation
is
based
on
five
key
indices:
R2,
RMSE,
VAF,
MAE,
bias,
addressing
an
assessment
predictive
models’
performance
capabilities.
outcomes
reveal
that
exhibiting
R2
values
(0.971
0.978)
train
test
stages,
respectively,
emerges
as
best
model
estimating
compared
other
models.
Consequently,
proposed
GWO-XGBoost
algorithm
proves
be
efficient
tool
anticipating
CSFrRNSC.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 15, 2025
Abstract
Researchers
and
stakeholders
have
shown
interest
in
heterogeneous
composite
biodiesel
(HCB)
due
to
its
enhanced
fuel
properties
environmental
friendliness
(EF).
The
lack
of
high
viscosity
datasets
for
parent
hybrid
oils
has
hindered
their
commercialisation.
Reliable
models
are
lacking
optimise
the
transesterification
parameters
developing
HCB,
scarcity
predictive
affected
climate
researchers
experts.
In
this
study,
basic
were
analysed,
developed
yield
HCB
kinematic
(KV)
biodiesel/neem
castor
seed
oil
methyl
ester
(NCSOME)
using
Artificial
Neural
Network
(ANN)
Adaptive
Neuro
Fuzzy
Inference
System
(ANFIS).
Statistical
indices
such
as
computed
coefficient
determination
(R
2
),
root-mean-square-error
(RMSE),
standard
error
prediction
(SEP),
mean
average
(MAE),
absolute
deviation
(AAD)
used
evaluate
effectiveness
techniques.
Emission
NCSOME-diesel
blends
also
established.
study
investigated
impact
optimised
types/NCSOME-diesel
(10–30
vol%),
ZnO
nanoparticle
dosage
(400–800
ppm),
engine
speed
(1100–1700
rpm),
load
(10–30%)
on
emission
characteristics
(EFI)
carbon
monoxide
(CO),
Oxides
Nitrogen
(NOx),
Unburnt
Hydrocarbon
(UHC)
Response
Surface
Methodology
(RSM).
ANFIS
model
demonstrated
superior
performance
terms
R
,
RMSE,
SEP,
MAE,
AAD
compared
ANN
predicting
KV
HCB.
optimal
levels
CO
(49.26
NO
x
(0.5171
UHC
(2.783)
achieved
with
a
type
23.4%,
685.432
ppm,
1329.2
rpm,
10%
ensure
cleaner
EFI.
can
effectively
predict
fuel-related
improve
process,
while
RSM
be
valuable
tool
accurate
forecasting
promoting
environment.
provide
reliable
information
strategic
planning
automotive
industries.