1 | using System;
|
---|
2 | using System.Collections.Generic;
|
---|
3 | using HeuristicLab.Common;
|
---|
4 | using HeuristicLab.Core;
|
---|
5 | using HeuristicLab.Data;
|
---|
6 | using HeuristicLab.Encodings.RealVectorEncoding;
|
---|
7 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
|
---|
8 |
|
---|
9 | namespace HeuristicLab.Problems.MultiObjectiveTestFunctions {
|
---|
10 | [Item("Kursawe", "Kursawe function from // http://darwin.di.uminho.pt/jecoli/index.php/Multiobjective_example [30.11.2015]")]
|
---|
11 | [StorableClass]
|
---|
12 | public class Kursawe : MultiObjectiveTestFunction {
|
---|
13 |
|
---|
14 | public override double[,] Bounds(int objectives) {
|
---|
15 | return new double[,] { { -5, 5 } };
|
---|
16 | }
|
---|
17 |
|
---|
18 | public override bool[] Maximization(int objecitves) {
|
---|
19 | return new bool[2];
|
---|
20 | }
|
---|
21 |
|
---|
22 | public override int MinimumObjectives {
|
---|
23 | get { return 2; }
|
---|
24 | }
|
---|
25 | public override int MaximumObjectives {
|
---|
26 | get {return 2;}
|
---|
27 | }
|
---|
28 |
|
---|
29 | public override int MinimumSolutionLength {
|
---|
30 | get {return 3;}
|
---|
31 | }
|
---|
32 | public override int MaximumSolutionLength {
|
---|
33 | get { return int.MaxValue; }
|
---|
34 | }
|
---|
35 |
|
---|
36 | public override IEnumerable<double[]> OptimalParetoFront(int objecitves) {
|
---|
37 | return PFStore.get(this.ItemName);
|
---|
38 | }
|
---|
39 | public override double BestKnownHypervolume(int objecitves) {
|
---|
40 | return new Hypervolume(ReferencePoint(objecitves), Maximization(2)).GetHypervolume(OptimalParetoFront(objecitves));
|
---|
41 | }
|
---|
42 | public override double[] ReferencePoint(int objectives) {
|
---|
43 | return new double[] { 11, 11 };
|
---|
44 | }
|
---|
45 |
|
---|
46 | [StorableConstructor]
|
---|
47 | protected Kursawe(bool deserializing) : base(deserializing) { }
|
---|
48 | protected Kursawe(Kursawe original, Cloner cloner) : base(original, cloner) { }
|
---|
49 | public override IDeepCloneable Clone(Cloner cloner) {
|
---|
50 | return new Kursawe(this, cloner);
|
---|
51 | }
|
---|
52 | public Kursawe() : base() { }
|
---|
53 |
|
---|
54 |
|
---|
55 |
|
---|
56 |
|
---|
57 |
|
---|
58 | public override double[] Evaluate(RealVector r, int objectives) {
|
---|
59 | if (objectives != 2) throw new ArgumentException("The Kursawe problem must always have 2 objectives");
|
---|
60 | //objective 1
|
---|
61 | double f0 = 0.0;
|
---|
62 | for (int i = 0; i < r.Length-1; i++) {
|
---|
63 | f0 += -10 * Math.Exp(-0.2 * Math.Sqrt(r[i] * r[i] + r[i + 1] * r[i + 1]));
|
---|
64 | }
|
---|
65 | //objective2
|
---|
66 | double f1 = 0.0;
|
---|
67 | for (int i = 0; i < r.Length; i++) {
|
---|
68 | f1 += Math.Pow(Math.Abs(r[i]), 0.8) + 5 * Math.Sin(Math.Pow(r[i], 3));
|
---|
69 | }
|
---|
70 |
|
---|
71 | return new double[] { f0, f1 };
|
---|
72 | }
|
---|
73 | }
|
---|
74 | }
|
---|