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Table 5.20
Parameters of membership function of term-sets of COSS “condition of plant-
ings in other parkways”
Function
Parameter of the function
μ
2
1
0,000
0,002
0,000
0,004
2
2
μ
0,006
0,029
0,004
0,049
2
3
μ
0,078
0,082
0,049
0,058
2
4
μ
0,140
0,246
0,058
0,269
2
5
μ
0,515
0,736
0,269
0,149
2
6
μ
0,885
0,938
0,149
0,042
2
7
μ
0,980
1,000
0,042
0,000
a
1
il
Numbers
l
are shown in Table 3.15 of the example 3.5.
Membership functions of the fuzzy rating points describing conditions of
seventeen plant species in plantings of other parkways, are computed by the
formula
,
i
=
1
17
,
=
1
2
2
1
2
1
2
2
2
2
2
7
2
7
λ
=
a
⊗
μ
⊕
a
⊗
μ
⊕
...
⊕
a
⊗
μ
,
i
=
1
17
,
i
i
i
i
where
,
—generalized operations of multiplication and summation,
⊗
⊕
accordingly.
Fuzzy numbers
X
,
X
are defuzzificated by the
gravity method. The obtained numbers are denoted accordingly with
X
,
X
λ
2
i
1
i
,
,
,
1
7
,
λ
i
=
1
17
1
1
2
7
2
1
2
C
,
C
,
1
1
A
,
1
A
,
A
,
2
2
A
. Normalized ratings of seventeen plant species in plant-
ings of the Boulevard Ring avenue and in plantings of other parkways are
computed by the formula
i
=
1
17
,
C
p
−
A
p
E
p
=
i
1
,
p
=
1
2
i
=
1
17
.
i
p
p
A
−
A
7
1
Based on the obtained rating points, each plant specie is assigned to the state rat-
ing in accordance with the approach saying: the higher rating points are, higher the
rating is. The obtained results are summarized in Table 5.21 and Table 5.22.
The analysis completed allowed estimating the stability of individual species of
woody plants and brushwood under conditions of intensive human intervention.
