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<>各位能否帮我 分析一下以下这段啊 谢谢 <BR>FIX ALL VARS.( 4) WITH RC > 0.000000E+00<BR> SET X21 TO <= 0 AT 1, BND= 0.7457E+07 TWIN= 0.7457E+07 21<BR> SET X23 TO >= 58 AT 2, BND= 0.7456E+07 TWIN= 0.7456E+07 31<BR> SET X13 TO <= 74 AT 3, BND= 0.7456E+07 TWIN=-0.1000E+31 33<BR> SET X23 TO <= 58 AT 4, BND= 0.7454E+07 TWIN= 0.7456E+07 35<BR> </P>
<>全部是这样的:</P>
<>LP OPTIMUM FOUND AT STEP 11<BR> OBJECTIVE VALUE = 7457143.00</P>
<P> FIX ALL VARS.( 4) WITH RC > 0.000000E+00<BR> SET X21 TO <= 0 AT 1, BND= 0.7457E+07 TWIN= 0.7457E+07 21<BR> SET X23 TO >= 58 AT 2, BND= 0.7456E+07 TWIN= 0.7456E+07 31<BR> SET X13 TO <= 74 AT 3, BND= 0.7456E+07 TWIN=-0.1000E+31 33<BR> SET X23 TO <= 58 AT 4, BND= 0.7454E+07 TWIN= 0.7456E+07 35</P>
<P> NEW INTEGER SOLUTION OF 7454000.00 AT BRANCH 4 PIVOT 35<BR> BOUND ON OPTIMUM: 7457143.<BR> DELETE X23 AT LEVEL 4<BR> DELETE X13 AT LEVEL 3<BR> FLIP X23 TO <= 57 AT 2 WITH BND= 7456000.0<BR> SET X23 TO >= 57 AT 3, BND= 0.7456E+07 TWIN=-0.1000E+31 35<BR> SET X13 TO <= 75 AT 4, BND= 0.7456E+07 TWIN=-0.1000E+31 36</P>
<P> NEW INTEGER SOLUTION OF 7456000.00 AT BRANCH 5 PIVOT 36<BR> BOUND ON OPTIMUM: 7457143.<BR> DELETE X13 AT LEVEL 4<BR> DELETE X23 AT LEVEL 3<BR> DELETE X23 AT LEVEL 2<BR> DELETE X21 AT LEVEL 1<BR> ENUMERATION COMPLETE. BRANCHES= 5 PIVOTS= 36</P>
<P> LAST INTEGER SOLUTION IS THE BEST FOUND<BR> RE-INSTALLING BEST SOLUTION...</P>
<P> OBJECTIVE FUNCTION VALUE</P>
<P> 1) 7456000.</P>
<P> VARIABLE VALUE REDUCED COST<BR> X11 250.000000 -10000.000000<BR> X12 375.000000 -10000.000000<BR> X13 75.000000 -10000.000000<BR> X21 0.000000 -8000.000000<BR> X22 0.000000 -8000.000000<BR> X23 57.000000 -8000.000000<BR> X31 0.000000 -6000.000000<BR> X32 0.000000 -6000.000000<BR> X33 0.000000 -6000.000000</P>
<P><BR> ROW SLACK OR SURPLUS DUAL PRICES<BR> 2) 1500.000000 0.000000<BR> 3) 1650.000000 0.000000<BR> 4) 250.000000 0.000000<BR> 5) 0.000000 0.000000<BR> 6) 0.000000 0.000000<BR> 7) 1.000000 0.000000<BR> 8) 899.999878 0.000000<BR> 9) 899.999878 0.000000<BR> 10) 446.999939 0.000000<BR> 11) 452.999939 0.000000<BR> 12) 201.800003 0.000000<BR> 13) 197.800003 0.000000<BR> 14) 99.000023 0.000000<BR> 15) 101.000023 0.000000<BR> 16) 0.000000 0.000000<BR> 17) 943.000000 0.000000<BR> 18) 800.000000 0.000000</P>
<P> NO. ITERATIONS= 39<BR> BRANCHES= 5 DETERM.= 1.000E 0</P>
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