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Time-frequencyresponsesofsecondorderparametricsections
17
v
=
γ
2
ω
0
2
(
σ
0
1
)
,
where:Jv(·)-FirstkindBesselfunctionofnon-integralorderv[5],Yv(·)-
SecondkindBesselfunctionofnon-integralorderv[5].
CaseII(2
σ
0-var,
ω
0
2(t)-const)[11]:
q
1
(
t
)
=
e
ω
2
0
γ
D
e
γ
t
ω
0
2
σ
0
2
4
t
1
F
1
(
O
,
β
;
z
)
,
(18)
q
1
(
t
)
=
e
ω
2
0
γ
D
e
γ
t
ω
0
2
σ
0
2
4
t
1
F
1
(
O
β
+
1
,
2
β
;
z
)
,
(19)
thus:
O
a
(
t
=
)
ω
=
2
0
ω
σ
γ
2
0
0
+
D
γ
ω
e
0
γ
t
σ
2
γ
0
2
σ
0
t
4
,
,
(20)
(21)
(17)
β
=
1
+
ω
0
σ
γ
0
2
4
,
z
=0
ω
γ
D
e
γ
t
,
where:1F1(
O,β;
z)-confluenthypergeometricfunction[5].
CaseIII(2
σ
0-var,
ω
0
2(t)-var),[12]:
a
(
t
)
=
ω
2
0
D
γ
e
γ
t
σ
0
t
,
q
1
(
t
)
=
e
ω
2
0
γ
D
e
γ
t
ω
0
2
σ
0
2
4
t
1
F
1
(
O
,
β
;
z
)
,
q
1
(
t
)
=
e
ω
2
0
γ
D
e
γ
t
ω
0
2
σ
0
2
4
t
1
F
1
(
O
β
+
1
,
2
β
;
z
)
,
where:
O
=
4
1
γ
(
2
C
+
γ
(
D
ω
0
2
)
ω
0
(
4
σ
0
2
4
+
D
σ
0
ω
0
)
)
,
β
=
1
+
z
ω
=0
0
ω
γ
σ
γ
D
0
2
e
γ
4
t
.
,
(22)
(23)
(24)
(25)
(26)
(27)
(28)
(29)