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% 1-DME, 2-Methanol, 3-H2O
x=[xDME;xM;xH2O];
aij=[ 0     1.1352  13.402;
    -0.0652  0      -1.8713;
    12.174  3.3323      0  ];
bij=[ 0     -785.15  -6561.2;
    138.01   0       481.43;
    -6936.5  -689.48    0  ];
cij=[ 0     182686  974420;
    1.7135   0      7595.2;
    1108017 39.157    0  ];
taoij=aij+bij./T+cij./T^2;
Gij=exp(-0.3*taoij);
gama=exp(((x'*(taoij.*Gij))./(x'*Gij))'+diag(Gij.*[x,x,x]'./...
     ([x,x,x]'*Gij)*(taoij-([x,x,x]'*(taoij.*Gij))./([x,x,x]'*Gij))'));

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