这是我写的编程：其中有一个区间变量是七段的分段函数，我不知道怎么放置，
希望有大神可以接受挑战，一同讨论，谢谢
MODEL:
! A 4 supplier 3 manufacture 6 customer Transportation Problem;
SETS:
   SUPPLIES/CA1..CA4/: CAI;
   MANUFACTURES/CA1..CA3/: CAJ;
   CUSTOMERS/D1..D6/: DK;

   LINKS1(SUPPLIES, MANUFACTURES): DIJ, RIJ, DBAIJ;
   LINKS2(MANUFACTURES, CUSTOMERS): DJK, RJK, DBAJK;
ENDSETS
! Here is the data;
DATA:
   !attribute values;
   CAI = 2100 2300 2000 1900;
   CAJ = 2100 1700 1800;
   DK = 900 950 900 850 950 900;

   DIJ = 164 353 106
         200 385 182
         74  197 209
         92  97  227;
   RIJ = 2.53 1.58 2.69
         1.74 1.42 2.21
         3.08 2.05 1.90
         2.84 2.92 1.82;
   DJK = 551 487 503 258 500 699
         490 691 462 320 196 490
         328 274 502 257 699 916;
   RJK = 2.13 2.61 2.05 3.00 1.98 1.58
         2.45 1.50 2.37 2.77 3.08 2.21
         2.69 2.92 1.90 3.08 1.66 1.34;
   DBAIJ = 81.1 81.3 82.0
           80.9 81.0 81.2
           82.0 81.0 80.5
           81.5 80.2 81.0;
   DBAJK = 81.7 81.4 82.0 81.6 81.7 81.0
           81.3 81.7 82.1 81.3 82.0 81.3
           81.8 81.7 81.5 81.7 81.9 81.4;

ENDDATA
! The objective;
   MIN=@SUM(LINKS1(I,J):3.81*QIJ*DIJ)+@SUM(LINKS2(J,K):3.81*VJK*DJK)+
       @SUM(LINKS1(I,J):0.04*QIJ*DIJ)+@SUM(LINKS2(J,K):0.04*VJK*DJK)+
       @SUM(LINKS1(I,J):1.11*EIJ*DIJ)+@SUM(LINKS2(J,K):1.11*GJK*DJK)+
       @SUM(LINKS1(I,J):2.58*ADIJ*FIJ*DIJ/100)+@SUM(LINKS2(J,K):2.58*ADJK*SJK*DJK/100)+
       @SUM(LINKS1(I,J):12.85*TIJ)+@SUM(LINKS2(J,K):12.85*BJK);

! The constraints;
   @FOR( SUPPLIES(I):   @SUM( MANUFACTURES(J): QIJ)<=CAI);
   @FOR(  MANUFACTURES(J):  @SUM(CUSTOMERS(K): VJK)<=CAJ);
   @FOR(  CUSTOMERS(K):  @SUM(MANUFACTURES(J): VJK)=DK);
   @FOR(  MANUFACTURES(J):  @SUM(SUPPLIES(I): QIJ)=@SUM(CUSTOMERS(K):VJK));
        @FOR(LINKS1(SUP, MAN):  QIJ-10^6*XIJ<=0 );
        @FOR(LINKS1(SUP, MAN): QIJ-10^6*XIJ>=1-10^6 );
        @FOR(LINKS2(MAN, CUS): VJK-10^6*YJK<=0 );
        @FOR(LINKS2(MAN, CUS): VJK-10^6*YJK>=1-10^6 );
        @FOR(LINKS1(SUP, MAN):  @SUM(PIJL=XIJ );
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):DJKL(J,K,L)=YJK );
        @FOR(LINKS1(SUP, MAN):  @SUM(INTERVALS(L):UIJL*TIJ=DIJ*PIJL);
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):HJKL*BJK=DJK*DJKL);
        @FOR(LINKS1(SUP, MAN):  @SUM(INTERVALS(L):30+25.6*LOG10(UIJL)<=DBAIJ);
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):30+25.6*LOG10(HJKL)<=DBAJK);
        @FOR(LINKS1(SUP, MAN):  @SUM(INTERVALS(L):PIJL*MINL<=UIJL<=PIJL*MAXL);
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):DIJL*MINL<=HJKL<=DIJL*MAXL);
        @FOR(LINKS1(SUP, MAN):  @SUM(INTERVALS(L):EIJ=θL(UIJL)-10^6*(1-PIJL));
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):GJK=θL(HJKL)-10^6*(1-DJKL));
        @FOR(LINKS1(SUP, MAN):  @SUM(INTERVALS(L):FIJ=βL(UIJL)-10^6*(1-PIJL));
        @FOR(LINKS2(MAN, CUS):  @SUM(INTERVALS(L):SJK=βL(HJKL)-10^6*(1-DJKL));

       @FOR(LINKS1(SUP, MAN): @BIN(XIJ, PIJL) );
       @FOR(LINKS1(SUP, MAN): @BIN(YJK, DJKL) );


END