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.
Figure 3. The result of interpolation of the electroencephalographic signal in Haar's
fractional-square wavelet.
Error Evaluation:
Here are the numerical processing errors in Haar's fragment-constant,
fragment-line, and fragment-quadratic wavelets [15,16].
b
a
,
identified in
)
(
x
f
let a
continuous function be given [2]. segment
b
x
x
x
x
a
n
i
...
...
1
0
Nodes
const
x
x
h
i
i
1
h
- the distance between nodes.
There are formulas for determining the methodological errors of interpolation for polynomials of
different levels. For example, for zero-level polynomials (for Haar's fractional-constant
functions), the formula for determining the interpolation error is given by:
h
x
f
x
f
x
P
)
(
max
2
1
)
(
)
(
'
The formula for determining the interpolation error for first-order polynomials (for Haar's
fragmentary wavelets):
2
''
)
(
max
8
1
)
(
)
(
h
x
f
x
f
x
P
The formula for determining the interpolation error for second-order polynomials (for Haar's
fractional-square wavelets):
3
)
3
(
)
(
max
27
3
)
(
)
(
h
x
f
x
f
x
P
Here is an estimate of the absolute and relative error of digital processing of a biomedical signal
in Haar's polynomial wavelets..
0,0185
)
(
)
(
max
1
1
i
i
b
x
a
x
f
x
f
ISSN: 2278-4853 Vol 10, Issue 9, September, 2021 Impact Factor: SJIF 2021 = 7.699
Asian Journal of Multidimensional Research (AJMR)
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%
37
%
100
)
(
)
(
)
(
1
1
i
i
i
x
f
x
f
x
f
0,0075
)
(
)
(
max
2
2
i
i
b
x
a
x
f
x
f
%
15
%
100
)
(
)
(
)
(
2
2
i
i
i
x
f
x
f
x
f
0,0029
)
(
)
(
max
3
3
i
i
b
x
a
x
f
x
f
%
8
,
5
%
100
)
(
)
(
)
(
3
3
i
i
i
x
f
x
f
x
f
1
- The absolute error of Haar's fragmentary constant
2
- Absolute error of Haar's fractional line wavelet
3
- Absolute error of Haar's fractional quadratic wavelet
1
- fraction is the relative error of the constant wavelet
2
- the relative error of the fragment-line wavelet
3
- The relative error of Haar's fractional-square wavelet
Table- 1
Relative error
№
Signal
PC
PL
PS
1
Gastroentrologic
41%
23,2%
9,2%
2
Electroencephalography 37%
15%
5,8%
3
Magnetic derivative
22,4%
9%
3,6%
Table- 2
Absolute error
№
Сигнал
PC
PL
PS
1
Gastroentrologic
0,0245
0,0813
0,0042
2
Electroencephalography 0,0185
0,0075
0,0029
3
Magnetic derivative
0,0127
0,0028
0,0014
CONCLUSION
A model of digital processing of electroencephalographic signal was constructed in the partial-
polynomial wavelets of Haar and its errors were evaluated. The analysis of the obtained results
shows that in the evaluation of the electroencephalographic signal during the evaluation, the
absolute error of digital processing in the fragmentary wavelet of Haar is 0.0185, the absolute
error of digital processing in the fragmentary wavelet of Haar is 0.0075, , Was equal to 0029.As
ISSN: 2278-4853 Vol 10, Issue 9, September, 2021 Impact Factor: SJIF 2021 = 7.699
Asian Journal of Multidimensional Research (AJMR)
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a result, it was found that the absolute error of digital processing in Haar's fractional wavelet is
smaller than the absolute error of digital processing in Haar's fractional and linear wavelets,
suggesting that it is appropriate to use biomedical signals in digital processing in Haar's
fractional-square wavelet.
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1.
Astafeva N.M. wavelet analysis: Basic theories and examples of application // advances in
physical science, 1996, t.166, № 11. С. 1145– 1170.
2.
Daubechies I. The Wavelet Transform, Time-Frequency Localization and Signal Analysis //
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3.
Frick P.G., Wavelet-analysis and hierarchical models of turbulence: Preprint / IMSS UoR
RAN. Perm, 1992.
4.
Hakimjon Zaynidinov, Jonibek Juraev, & Umidjon Juraev. Digital Image Processing with
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5.
Smolentsev N.K. Fundamentals theory of wavelets. Wavelets in Matlab. - M .: DMK Press,
2005 .-- 304p.
6.
Akhmetkhanov R.S., Dubinin E.F., Kuksova V.I., “Application of lead transformations for
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45
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