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我对纸浆有疑问,我正在尝试转换此约束

∑_iϵN Xijkz+Vjkz+Ujkz = nsjk*sjz                     ∀ j ϵ J , ∀ z ϵ S , ∀ k ϵ K .

for i in N:
    prob += lpSum(X[(i,j,k,z) ]+V[(j,k,z)]+U[(j,k,z)]
    for j in J 
        for k in K 
            for z in S2)==(ns[k][j]*s1[k][j])

但我不确定这是否公平,我没有任何错误,但是,目标函数为 0

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