:PIV[变量名或变量序号]<CR>
3.命令使用:PIV命令执行以后,指定的变量就调入当前基中(即成为进基变量),离基变量按单纯形算法规则确定。如变量名缺省,则按进基规则依次选择进基变量。例如对于上一节的模型,其操作结果有:X2ENTERS AT VALUE 50.000 IN ROW3 OBJ. VALUE = 400.00
:PIVX3ENTERS AT VALUE 50.000 IN ROW4 OBJ. VALUE = 700.00
:PIVOBJECTIVE FUNCTION VALUE
1)700.000000VARIABLE VALUE REDUCEDCOST
X1 .000000 22.000000
DORANGE(SENSITIVITY) ANALYSIS ?
PIV>X1ENTERS AT VALUE 25.000 IN ROW3 OBJ. VALUE = 150.00
: max | 2x1 | +8x2 | +6x3 | |
s.t. | 8x1 | +3x2 | +2x3 | ≤250 |
| 2x1 | +x2 | | ≤50 |
| 4x1 | | +3x3 | ≤150 |
| x1 | x2 | x3 | ≥0 |
MAX 2 X1 + 8 X2 + 6 X3
SUBJECT TO2) 8 X1 + 3 X2 + 2 X3 <= 250
3) 2 X1 + X2 <= 50
4) 4 X1 + 3 X3 <= 150
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