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sunjie2668木蟲 (小有名氣)
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[求助]
x^2+3*y+e^z=0怎么畫Z關(guān)于X,Y的三維圖,求指教 已有5人參與
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| x^2+3*y+e^z=0怎么畫Z關(guān)于X,Y的三維圖,求指教 |

榮譽(yù)版主 (知名作家)
小木蟲浪子

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model: sets: QUARTERS/1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21/:x,y,c,w,p,b,q,f; KIND/1,2,3,4/:z; LINK(QUARTERS,KIND):a; endsets data: c=5.000,4.613,4.257,3.928,3.624,3.344,3.085,2.847,2.627,2.423,2.236, 2.0632,1.904,1.756,1.621,1.495,1.380,1.273,1.175,1.084,1.000; p=0.0000,0.0001,0.0002,0.0002,0.0003,0.0005,0.0007,0.0011,0.0017,0.0025,0.0037,0.0055, 0.0082,0.0127,0.0181,0.0271,0.0404,0.0602,0.0899,0.1341,0.2000; enddata init: f(1)=0;b(1)=0;q(1)=0;M=2;V=1; endinit @for(LINK(i,j):w(i)=a(i,1)*20*x(i)+a(i,2)*(18*x(i)+800)+a(i,3)*(15*x(i)+4400)+a(i,4)*(31400-(x(i)-1800)*V)+(a(i,1)+a(i,2)+a(i,3))*q(i)-f(i)*V -y(i)*c(i)); max=@sum(QUARTERS(i):w(i)); @for(QUARTERS(i):@SUM(KIND(j):a(i,j))=1); @for(LINK:@bin(a)); @for(LINK(i,j):a(i,1)=@if(x(i)#le#400,1,0);a(i,2)=@if(x(i)#le#1200#and#x(i)#gt#400,1,0);a(i,3)=@if(x(i)#le#1800#and#x(i)#gt#1200,1,0);a(i,4)=@if(x(i)#le#20000#and#x(i)#gt#1800,1,0)); @sum(QUARTERS(i):y(i))<=20000; @for(QUARTERS(i):x(i)=y(i)*(1-p(i))); @for(QUARTERS(i):0<=b(i)<=(1800-x(i))); @for(QUARTERS(i):0<=f(i)); @for(QUARTERS(i)|i#GT#1#and#i#le#21:f(i)=f(i-1)-b(i)+x(i-1)-1800); @for(LINK(i,j):q(i)=b(i)*(a(i,1)*(20-M)+a(i,2)*(18-M)+a(i,3)*(15-M))); end |
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