3

苦苦挣扎了一段时间,希望在这里寻求一些建议。首先,决策矩阵是这样的:

条件 1 -> 条件 2 -> 决定

 Yes           Yes          Go ahead
 Yes            No          Go ahead
  No           Yes          Go ahead
  No            No          Give up

假设: 1. 我们只考虑上述序列(“->”)。2. 条件 1 和 2 中的所有可能选项都只是“是”和“否”。

简化的标准是,如果在最后一个条件的所有可能选项下都做出相同的决定,那么在相同的 last-1 条件下可以省略最后一个条件。IE

对于决定“继续”*,

条件 1 -> 条件 2 -> 决定

 Yes        Yes =>  X       Go ahead
 Yes        Yes =>  X       Go ahead
  No           Yes          Go ahead

我最初的想法是在这部分(*)中应用求解器基础,而其他部分由传统编程处理,如 for 循环和递归。在这种情况下,最终答案应该是

条件 1 -> 条件 2 -> 决定

 Yes             X          Go ahead
  No           Yes          Go ahead
  No            No          Give up

我陷入的是以下逻辑的实现:

决策和目标:从集合*中,选择最小的索引i(即选择一个代表要简化的关键的案例)。

约束:选择条件 1 等于已决定案例的条件 1 的案例,然后检查所有选择的案例中是否所有可能的选项都出现在条件 2 中。

一旦我们得到决定,即 0,我们就知道条件 1 为“是”的情况可以省略条件 2。

看到任何人都可以提供帮助。谢谢。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SolverFoundation.Common;
using Microsoft.SolverFoundation.Services;
using Microsoft.SolverFoundation.Solvers;

namespace ConsoleApplication5
{
 class Program
 {
  static void Main(string[] args)
  {
   SolverContext context = SolverContext.GetContext();
   Model model = context.CreateModel();

   Segment[] segmentData = new Segment[] { 
    new Segment { id = 0, col1 = 0, col2 = 0 },
    new Segment { id = 1, col1 = 0, col2 = 1 },//answer = 0, since this row's col1 and col2 = row 0's, thus can be omitted (simplified).
    new Segment { id = 2, col1 = 1, col2 = 0 } //answer = 0, since this row's col1 not = row 0's, thus remain unchanged.
   };

   //set
   Set items = new Set(Domain.Integer, "items");

   //decision
   Decision i = new Decision(Domain.IntegerRange(0,1), "index");
   model.AddDecisions(i);

   //parameter
   Parameter col1 = new Parameter(Domain.Integer, "col1", items);
   col1.SetBinding(segmentData, "col1", "id");
   Parameter col2 = new Parameter(Domain.Integer, "col2", items);
   col2.SetBinding(segmentData, "col2", "id");
   model.AddParameters(col1, col2);

   //constraint
   //sum of all possible col2 should be 0 + 1 = 1
   model.AddConstraint("cases", 
    1 == Model.Sum(
     Model.ForEachWhere(
      items,
      s => col2[s],
      s => col1[s] == i
     )
    )
   );

   model.AddGoal("goal", GoalKind.Minimize, i);

   //problem: no suitable directive found.
   HybridLocalSearchDirective directive = new HybridLocalSearchDirective();
   directive.TimeLimit = 10000;
   Solution solution = context.Solve(directive);

   Report report = solution.GetReport();
   Console.WriteLine("{0}", i);
   Console.Write("{0}", report);
   Console.ReadLine();
  }
 }

 class Segment
 {
  public int id { get; set; }
  public int col1 { get; set; }
  public int col2 { get; set; }
 }
}
4

1 回答 1

-1

is it possible to use if command like this

if (Condition_One || Condition_Two)
{
 //Go ahead command
}
else
{
//Give up code
}

if you can provide a sample code which will help others to answer...

thanks

于 2011-07-17T13:03:30.437 回答