Ũ
1
7. 12
..
. 11--2
..
2011
1
128 . 5 100 900 . . , ?
:
N = 2 x
900 = 2 x
29 = 512, 210 = 1024
, 10-
, , :
10 * 128 * 5 = 6400 = 800 .
: 800
2
24 . , .
:
N = mn
N = 24
m=2
24 = 2n,
24 = 16, 25 = 32
, , 5.
: 5 .
3
100 . , , 2 . ?
:
P , :
I = log2(1/P)
2 = log2(1/P)
22 = 1/P
4 = 1/P
P=1/4
100*1/4 = 25.
, 25 .
: 25 .
4
ͻ , .
:
:
I = log2N, N .
N = 4, I = log24 = 2.
. 7 , 4 , :
P = 2/4 = 0.5
P = 3/4 = 0.75
P = 1/4 = 0.25
P = 1/4 = 0.25
I = Ni * log2(1/Pi), Ni i- , Pi .
:
i = log2(1/0.5) = 1
i = log2(1/0.75) = 0.41
i = log2(1/0.25) = 2
i = log2(1/0.25) = 2
:
I = 2*1 + 3*0.41 + 1*2 +1*2 = 7.23
:
|
|
H(a) = - Pi*log2Pi
H(a) = -(1*log2(1) + 0.75*log2(0.41) + 2*0.25* log2(0.25)) = -1.96
:
D = (Hmax(a) H(a))/Hmax(a).
Hmax(a) Hmax(a) = 2
D = (2 (-1.96))/2 = 1.98
: I = 2, H = -1.96, D = 1.98
5
( ) 5 128000 .
.
5 = 5120 = 5242880 = 41943040
, 41943040 / 128000 = 327.68 .
: 327.68
6
16- :
a + b (16), a = 2D7.25(16), b = 57.5(8)
a = 2*162 + 13*16 + 7 + 2*16-1 + 5*16-2 = 727.144(10)
b = 5*8 + 7 + 5*8-1 = 47.625(10)
a + b = 774.769(10) = 306.0C4(16)
:
774 16 0,769 2
768 48 16 12,304 2
6 48 3 4,864 2
: 306.0C4(16)
7
, 8- .
a b(8), a = AEC.55(16), b = 237. 8 5(8)
:
,
b = 237. 8 5(8) ( 0, 1, 2, 3, 4, 5, 6, 7).