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我在试图做另一件事时错误地写了这个不可行的oml
。有什么不对的是,底部的约束是不可能的,因为右边的最小值必须为零,而左边的最大值必须大于零(除非我错过了某些东西)。微软解算器基金会是否被窃听?
问题是,如果你运行它,MSF会乐意给你一个答案,而不是告诉你是不可行的。
string oml = @"
Model[
Decisions[Integers[0,Infinity], d1],
Decisions[Integers[0,Infinity], d2],
Decisions[Integers[0,Infinity], d3],
Decisions[Integers[0,Infinity], d4],
Decisions[Integers[0,Infinity], d5],
Decisions[Integers[0,Infinity], d6],
Decisions[Integers[0,Infinity], d7],
Decisions[Integers[0,Infinity], d8],
Decisions[Integers[0,Infinity], d9],
Decisions[Integers[0,Infinity], d10],
Decisions[Integers[0,Infinity], d11],
Decisions[Integers[0,Infinity], d12],
Decisions[Integers[0,Infinity], d13],
Decisions[Integers[0,Infinity], d14],
Decisions[Integers[0,Infinity], d15],
Decisions[Integers[0,Infinity], d16],
Constraints[d1 + d2 + d3 + d4 + d5 + d6 + d7 + d8 == 2],
Constraints[d9 + d10 + d11 + d12 + d13 + d14 + d15 + d16 == 2],
Constraints[d1 + d9 <= 1],
Constraints[d2 + d10 <= 1],
Constraints[d3 + d11 <= 1],
Constraints[d4 + d12 <= 1],
Constraints[d5 + d13 <= 1],
Constraints[d6 + d14 <= 1],
Constraints[d7 + d15 <= 1],
Constraints[d8 + d16 <= 1],
Constraints[Max[d1 * 1, d2 * 2, d3 * 3, d4 * 4, d5 * 1, d6 * 2, d7 * 3, d8 * 4] <= Min[d9 * 1, d10 * 2, d11 * 3, d12 * 4, d13 * 1, d14 * 2, d15 * 3, d16 * 4]]
]
";
SolverContext sc = SolverContext.GetContext();
sc.LoadModel(FileFormat.OML, new StringReader(oml));
var sol = sc.Solve();
Console.WriteLine(sol.GetReport());
编辑:
这就是我的报告给我:
===Solver Foundation Service Report===
Date: 6/26/2012 11:00:55 AM
Version: Microsoft Solver Foundation 3.0.1.10599 Express Edition
Model Name: DefaultModel
Capabilities Applied: CP
Solve Time (ms): 135
Total Time (ms): 338
Solve Completion Status: Feasible
Solver Selected: Microsoft.SolverFoundation.Solvers.ConstraintSystem
Directives:
Microsoft.SolverFoundation.Services.Directive
Algorithm: TreeSearch
Variable Selection: DomainOverWeightedDegree
Value Selection: ForwardOrder
Move Selection: Any
Backtrack Count: 0
===Solution Details===
Goals:
Decisions:
d1: 0
d2: 0
d3: 0
d4: 0
d5: 0
d6: 0
d7: 1
d8: 1
d9: 0
d10: 0
d11: 1
d12: 1
d13: 0
d14: 0
d15: 0
d16: 0
非建设性但有趣的地狱 – Charleh
你正在使用哪个MSF版本?我在MSF 3.1(构建3.0.2.10889,64位)中运行了您的代码,并获取了报告_Solve完成状态:Infeasible_。选定求解器_ConstraintSystem_,算法_TreeSearch_。 –
对于我们这些有点懒惰的人,你能否提供一些你认为值是最终约束检查应该处理的细节? – NotMe