,
, a0 > 0 D1, D2,, Dn
, i = 1, 2, 3, , n.
, , , .
: a1 ai ( ), , - ; n . i- i ´ i.
∆n = 0, , .
∆n an, , : ∆n = an*∆n-1.
∆n = 0 : an = 0 ∆n-1 = 0.
an = 0 , , ∆n-1 = 0 , .
.
. :
.
(i = 1) , (i = 2) , (i ³ 3) , :
i , k .
, , 0 1.
, . .
r11 = a0 | r12 = a2 | r13 = a4 | r14 = a6 | |||
r21 = a1 | r22 = a3 | r23 = a5 | r24 = a7 | |||
... | ||||||
n+1 |
.
, , , .
˳ :
ϳ p jw: pjw :
|
|
F(jw) = 0(jw)n + 1(jw)n-1 + 2(jw)n-2 ++ an.
F(jw) : F(jw) = P(w)+jQ(w).
ij P(w) w:
P(w) = an an-2w2 + an-4w4 -
:
Q(w) = an-1w an-3w3 +
w , . w 0 ¥, F(jw) , ̳.
̳:
, n- , , w 0 ¥ F(jw) , . , w 0 ¥ n .
F(jw) , an. , , , . n , , .
F(jw) , . F(jw)= 0 w = 0 - ; F(jw)= 0 w ≠ 0 - .
̳
1. - "" .
2. - "" .
3. "" .
4. " ".
̳:
, F(jw) , (w) =0 Q(w) =0 .
:
1. , ̳ , - .
2. , , , , , .
3. , .
4. , , .
5. , .
6. ' , .
:
- ;
- ;
- .
|
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1.
, W(jw) (-1; j0).
: 1 - ; 2 - ; 3 - . |
, - W(jw) . . W1(jw) = 1+W(jw), (-1; j0) W(jw). W1(jw) p, (-1; j0), p, - .
, , (-1; j0) , :
(-1; j0), , w ( ) ( ) (-1; j0) .
2.
, W(jw), - , , (-1; j0). |
1. .
2. .
3. .
4. .
5. ( ).
Գ
:
- , A(w) = | W(jw) | = 1 w;
- , j(w) = - p, wp.
: w = wp
䳺 g(t)=gmsinwt gm. w wp j(w), W(jw) -p. ' g(t), .
w = wp |W(jwp)| = 1, w = wp, g(t). , W(jw) (-1; j0).
w = wp |W(jwp)| < 1, . , (-1; j0).
w = wp |W(jwp)| >1, . , W(jw) (-1; j0).
(-1; j0) -, ; - - W(jw).
3. .
W(jw) l/2 (-1; j0), l - .
, (-1; j0) l/2.
ʳ , .
, -π : w < wp - ;
|
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w = wp - ;
w > wp - .
, (-p) 0 w ( (-p) 0 w ). |
l , :
, (-p) 0 w l/2.