1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Linq;
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4 | using HeuristicLab.Random;
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5 |
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6 | namespace HeuristicLab.Problems.Instances.DataAnalysis {
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7 | public class FeynmanBonus12 : FeynmanDescriptor {
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8 | private readonly int testSamples;
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9 | private readonly int trainingSamples;
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10 |
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11 | public FeynmanBonus12() : this((int) DateTime.Now.Ticks, 10000, 10000) { }
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12 |
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13 | public FeynmanBonus12(int seed) {
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14 | Seed = seed;
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15 | trainingSamples = 10000;
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16 | testSamples = 10000;
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17 | }
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18 |
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19 | public FeynmanBonus12(int seed, int trainingSamples, int testSamples) {
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20 | Seed = seed;
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21 | this.trainingSamples = trainingSamples;
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22 | this.testSamples = testSamples;
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23 | }
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24 |
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25 | public override string Name {
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26 | get {
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27 | return string.Format(
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28 | "Feynman 2.11 Jackson q/(4*pi*epsilon*y**2)*(4*pi*epsilon*Volt*d-q*d*y**3/(y**2-d**2)**2) | {0} samples",
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29 | trainingSamples);
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30 | }
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31 | }
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32 |
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33 | protected override string TargetVariable { get { return "F"; } }
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34 | protected override string[] VariableNames { get { return new[] {"q", "y", "Volt", "d", "epsilon", "F"}; } }
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35 | protected override string[] AllowedInputVariables { get { return new[] {"q", "y", "Volt", "d", "epsilon"}; } }
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36 |
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37 | public int Seed { get; private set; }
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38 |
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39 | protected override int TrainingPartitionStart { get { return 0; } }
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40 | protected override int TrainingPartitionEnd { get { return trainingSamples; } }
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41 | protected override int TestPartitionStart { get { return trainingSamples; } }
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42 | protected override int TestPartitionEnd { get { return trainingSamples + testSamples; } }
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43 |
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44 | protected override List<List<double>> GenerateValues() {
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45 | var rand = new MersenneTwister((uint) Seed);
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46 |
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47 | var data = new List<List<double>>();
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48 | var q = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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49 | var y = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 3).ToList();
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50 | var Volt = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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51 | var d = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 4, 6).ToList();
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52 | var epsilon = ValueGenerator.GenerateUniformDistributedValues(rand.Next(), TestPartitionEnd, 1, 5).ToList();
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53 |
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54 | var F = new List<double>();
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55 |
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56 | data.Add(q);
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57 | data.Add(y);
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58 | data.Add(Volt);
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59 | data.Add(d);
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60 | data.Add(epsilon);
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61 | data.Add(F);
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62 |
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63 | for (var i = 0; i < q.Count; i++) {
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64 | var res = q[i] / (4 * Math.PI * epsilon[i] * Math.Pow(y[i], 2)) * (
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65 | 4 * Math.PI * epsilon[i] * Volt[i] * d[i] - q[i] * d[i] * Math.Pow(y[i], 3) /
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66 | Math.Pow(Math.Pow(y[i], 2) - Math.Pow(d[i], 2), 2));
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67 | F.Add(res);
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68 | }
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69 |
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70 | return data;
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71 | }
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72 | }
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73 | } |
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