3
558
. (1) , (2).
1
13
1 8
.
2x1 - x2 - x3 + x4≤6
x1 + 2x2 + x3 - x4≥8
3x1 - x2 + 2x3 + 2x4≤10
- x1 + 3x2 + 5x3 - 3x4=15
1 ≥0, 2≥0, 3≥0, 4≥0
F(X) = - x1 + 2x2 - x3 + x4 ---> min
-.
, .
F(X) = - x1 + 2x2 - x3 + x4 -.
2x1 - x2 - x3 + x4≤6
x1 + 2x2 + x3 - x4≥8
3x1 - x2 + 2x3 + 2x4≤10
- x1 + 3x2 + 5x3 - 3x4=15
( ).
1- (≤) x5. 2- (≥) x6 . 3- (≤) x7.
2x1-1x2-1x3 + 1x4 + 1x5 + 0x6 + 0x7 = 6
1x1 + 2x2 + 1x3-1x4 + 0x5-1x6 + 0x7 = 8
3x1-1x2 + 2x3 + 2x4 + 0x5 + 0x6 + 1x7 = 10
-1x1 + 3x2 + 5x3-3x4 + 0x5 + 0x6 + 0x7 = 15
x: 2- x8; 4- x9;
2x1-1x2-1x3 + 1x4 + 1x5 + 0x6 + 0x7 + 0x8 + 0x9 = 6
1x1 + 2x2 + 1x3-1x4 + 0x5-1x6 + 0x7 + 1x8 + 0x9 = 8
3x1-1x2 + 2x3 + 2x4 + 0x5 + 0x6 + 1x7 + 0x8 + 0x9 = 10
-1x1 + 3x2 + 5x3-3x4 + 0x5 + 0x6 + 0x7 + 0x8 + 1x9 = 15
:
F(X) = -1x1+2x2-1x3+x4+Mx8+Mx9 → min
, , , , .
, .
, , .
:
x8 = 8-x1-2x2-x3+x4+x6
x9 = 15+x1-3x2-5x3+3x4
:
F(X) = -x1 + 2x2-x3 + x4 + M(8-x1-2x2-x3+x4+x6) + M(15+x1-3x2-5x3+3x4) → min
F(X) = (-1)x1+(2-5M)x2+(-1-6M)x3+(1+4M)x4+(M)x6+(23M) → min
A = a(ij) :
|
|
-1 | -1 | |||||||
-1 | -1 | |||||||
-1 | ||||||||
-1 | -3 |
, .
: , , , .
: x5, x8, x7, x9
, 0, :
X1 = (0,0,0,0,6,0,10,8,15)
, .
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | |
x5 | -1 | -1 | ||||||||
x8 | -1 | -1 | ||||||||
x7 | -1 | |||||||||
x9 | -1 | -3 | ||||||||
F(X0) | 23M | -2+5M | 1+6M | -1-4M | -M |
-.
0.
1. .
, .
2. .
, x3, .
3. .
Di : bi / ai3
:
min (-, 8: 1, 10: 2, 15: 5) = 3
, 4- .
(5) .
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | min | |
x5 | -1 | -1 | - | ||||||||
x8 | -1 | -1 | |||||||||
x7 | -1 | ||||||||||
x9 | -1 | -3 | |||||||||
F(X1) | 23M | -2+5M | 1+6M | -1-4M | -M |
4. -.
.
x9 1 x3.
, x3 1, x9 0 =5
1 1.
x3 1 .
, 1 x3 x3.
1, , .
, .
= - (*)/
- , - (5), - , .
|
|
-:
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | |
x5 | 9/5 | -2/5 | 2/5 | 1/5 | ||||||
x8 | 6/5 | 7/5 | -2/5 | -1 | -1/5 | |||||
x7 | 17/5 | -11/5 | 16/5 | -2/5 | ||||||
x3 | -1/5 | 3/5 | -3/5 | 1/5 | ||||||
F(X1) | -3+5M | 11/5+11/5M | -23/5+12/5M | -2/5-2/5M | -M | -1/5-11/5M |
1.
1. .
, .
2. .
, x2, .
3. .
Di : bi / ai2
:
min (-, 5: 12/5, -, 3: 3/5) = 34/7
, 2- .
(12/5) .
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | min | |
x5 | 14/5 | -2/5 | 2/5 | 1/5 | - | ||||||
x8 | 11/5 | 12/5 | -2/5 | -1 | -1/5 | 34/7 | |||||
x7 | 32/5 | -21/5 | 31/5 | -2/5 | - | ||||||
x3 | -1/5 | 3/5 | -3/5 | 1/5 | |||||||
F(X2) | -3+5M | 11/5+11/5M | -23/5+12/5M | -2/5-2/5M | -M | -1/5-11/5M |
4. -.
.
x8 2 x2.
, x2 2, x8 1 =12/5
2 1.
x2 2 .
, 2 x2 x2.
2, , .
-:
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | |
x5 | 73/7 | 15/7 | 2/7 | -2/7 | 2/7 | 1/7 | ||||
x2 | 25/7 | 6/7 | -2/7 | -5/7 | 5/7 | -1/7 | ||||
x7 | 83/7 | 37/7 | 18/7 | -11/7 | 11/7 | -5/7 | ||||
x3 | 6/7 | -5/7 | -3/7 | 3/7 | -3/7 | 2/7 | ||||
F(X2) | 62/7 | 33/7 | -11/7 | -16/7 | 16/7-M | -4/7-M |
2.
1. .
, .
2. .
, x1, .
3. .
Di : bi / ai1
:
min (103/7: 21/7, 34/7: 6/7, 116/7: 52/7, -) = 29/37
, 3- .
(52/7) .
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | min | |
x5 | 103/7 | 21/7 | 2/7 | -2/7 | 2/7 | 1/7 | 413/15 | ||||
x2 | 34/7 | 6/7 | -2/7 | -5/7 | 5/7 | -1/7 | 41/6 | ||||
x7 | 116/7 | 52/7 | 24/7 | -14/7 | 14/7 | -5/7 | 29/37 | ||||
x3 | 6/7 | -5/7 | -3/7 | 3/7 | -3/7 | 2/7 | - | ||||
F(X3) | 62/7 | 33/7 | -11/7 | -16/7 | 16/7-M | -4/7-M |
4. -.
|
|
.
x7 3 x1.
, x1 3, x7 2 =52/7
3 1.
x1 3 .
, 3 x1 x1.
3, , .
-:
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | |
x5 | 208/37 | -28/37 | 13/37 | -15/37 | -13/37 | 16/37 | ||||
x2 | 61/37 | -26/37 | -17/37 | -6/37 | 17/37 | -1/37 | ||||
x1 | 83/37 | 18/37 | -11/37 | 7/37 | 11/37 | -5/37 | ||||
x3 | 91/37 | -3/37 | 8/37 | 5/37 | -8/37 | 7/37 | ||||
F(X3) | -115/37 | -230/37 | -31/37 | -24/37 | 31/37-M | -4/37-M |
1. .
. .
-:
B | x1 | x2 | x3 | x4 | x5 | x6 | x7 | x8 | x9 | |
x5 | 208/37 | -28/37 | 13/37 | -15/37 | -13/37 | 16/37 | ||||
x2 | 61/37 | -26/37 | -17/37 | -6/37 | 17/37 | -1/37 | ||||
x1 | 83/37 | 18/37 | -11/37 | 7/37 | 11/37 | -5/37 | ||||
x3 | 91/37 | -3/37 | 8/37 | 5/37 | -8/37 | 7/37 | ||||
F(X4) | -115/37 | -230/37 | -31/37 | -24/37 | 31/37-M | -4/37-M |
( ), .
:
x2 = 124/37
x1 = 29/37
x3 = 217/37
F(X) = 2124/37 -129/37 -1217/37 = -115/37
.
x5. , 1- 523/37
0 x1 , x1 - .
0 x2 , x2 - .
0 x3 , x3 - .
-230/37> 0 x4 , x4 - .
-31/37 x6 , ( ) -31/37.
-24/37 x7 , ( ) -24/37.
31/37-1M x8 , ( ) 31/37-1M.
-4/37-1M x9 , ( ) -4/37-1M.
2
13
2 11
Bi i | B1 | B2 | B3 | B4 | B5 | ai |
1 | 80 2 | 40 4 | 1 | 6 | 7 | |
2 | 3 | 20 3 | 70 5 | 20 4 | 2 | |
3 | 8 | 9 | 6 | 80 3 3 | 50 4 4 | |
bj |
7
(m+n-1=5+3-1=7).
:
Z1= 80*2+40*4+20*3+70*5+20*4+80*3+50*4=1250
Bi i | B1 | B2 | B3 | B4 | B5 | ai |
1 | 50 2 | 4 | 70 1 | 6 | 7 | |
2 | 30 3 | 30 3 | 5 | 4 | 50 2 | |
3 | 8 | 30 9 | 6 | 100 4 3 | 4 | |
bj |
|
|
7
(m+n-1=5+3-1=7).
:
Z2= 50*2+30*3+30*3+30*9+70*1+100*4+50*2=1120