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我偶然发现了一个我想从 Julia 转换为 Python 的软件（对 Julia 没有太多经验）。我遇到的主要问题是我不明白在我用评论#PROBLEM BELOW/ABOVE 标记的部分中到底发生了什么

滑板队是一个 180 x 10 矩阵（180 名滑板手和 10 支球队），球队存储为二进制数组，其中滑板队 [0] 给出球员 0 的数组，例如：[1, 0, 0, 0, 0, 0, 0 , 0, 0, 0]。 

m = Model(solver=GLPKSolverMIP()) 
# Variable for skaters in lineup 
@defVar(m, skaters_lineup[i=1:num_skaters], Bin) 

# Variable for goalie in lineup 
@defVar(m, goalies_lineup[i=1:num_goalies], Bin) 

# One goalie constraint 
@addConstraint(m, sum{goalies_lineup[i], i=1:num_goalies} == 1) 

# Eight Skaters constraint 
@addConstraint(m, sum{skaters_lineup[i], i=1:num_skaters} == 8) 

# between 2 and 3 centers 
@addConstraint(m, sum{centers[i]*skaters_lineup[i], i=1:num_skaters} <= 3) 
@addConstraint(m, 2 <= sum{centers[i]*skaters_lineup[i], i=1:num_skaters}) 

# between 3 and 4 wingers 
@addConstraint(m, sum{wingers[i]*skaters_lineup[i], i=1:num_skaters} <= 4) 
@addConstraint(m, 3<=sum{wingers[i]*skaters_lineup[i], i=1:num_skaters}) 

# between 2 and 3 defenders 
@addConstraint(m, 2 <= sum{defenders[i]*skaters_lineup[i], i=1:num_skaters}) 
@addConstraint(m, sum{defenders[i]*skaters_lineup[i], i=1:num_skaters} <= 3) 

# Financial Constraint 
@addConstraint(m, sum{skaters[i,:Salary]*skaters_lineup[i], i=1:num_skaters} + sum{goalies[i,:Salary]*goalies_lineup[i], i=1:num_goalies} <= 50000) 

# exactly 3 different teams for the 8 skaters constraint 
@defVar(m, used_team[i=1:num_teams], Bin)

#PROBLEM BELOW
@addConstraint(m, constr[i=1:num_teams], used_team[i] <= sum{skaters_teams[t, i]*skaters_lineup[t], t=1:num_skaters}) 
@addConstraint(m, constr[i=1:num_teams], sum{skaters_teams[t, i]*skaters_lineup[t], t=1:num_skaters} <= 6*used_team[i]) 
#PROBLEM ABOVE

@addConstraint(m, sum{used_team[i], i=1:num_teams} == 3)

是否像这样循环：

for i in range(num_teams):
    for t in range(num_skaters):
        m += sum(skaters_teams[i][t]*skaters_lineup[t]) >=ut[i]
        m += sum(skaters_teams[i][t]*skaters_lineup[t]) <=6*ut[i]

我也找不到任何关于使用 3 个参数的文档@addConstraint。第一个是您要添加的问题，第三个是您要添加的约束。第二个是什么？

@addConstraint(m, constr[i=1:num_teams], sum{skaters_teams[t, i]*skaters_lineup[t], t=1:num_skaters} <= 6*used_team[i])
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1 回答 1

1

在玩了一段时间后，我找到了解决方案。万一有人对纸浆有类似的问题，我就在这里跳。

for i in range(num_teams):
    m += sum(x * st[i] for x,st in zip (skaters_lineup, skaters_teams[:])) >= used_team[i]
    m += sum(x * st[i] for x,st in zip (skaters_lineup, skaters_teams[:])) <= 6*used_team[i]
于 2016-08-23T18:54:31.087 回答