1 | /* |
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2 | Copyright 2009 Virginia Polytechnic Institute and State University |
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3 | |
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4 | Licensed under the Apache License, Version 2.0 (the "License"); |
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5 | you may not use this file except in compliance with the License. |
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6 | You may obtain a copy of the License at |
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7 | |
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8 | http://www.apache.org/licenses/LICENSE-2.0 |
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9 | |
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10 | Unless required by applicable law or agreed to in writing, software |
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11 | distributed under the License is distributed on an "AS IS" BASIS, |
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12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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13 | See the License for the specific language governing permissions and |
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14 | limitations under the License. |
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15 | */ |
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16 | |
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17 | /*! This file provides a default implementation for a case-based-reasoning based |
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18 | * cognitive engine. |
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19 | */ |
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20 | |
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21 | #include "CBR_CE.h" |
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22 | #include <iostream> |
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23 | |
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24 | |
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25 | using namespace std; |
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26 | |
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27 | // ZERO is consider +1 sign |
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28 | inline int signof(int nos) { return ( (nos < 0) ? -1:1 ); } |
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29 | |
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30 | |
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31 | |
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32 | |
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33 | CBR_CE::CBR_CE(const char* serverName, const char* serverPort, \ |
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34 | const int32_t numFields, const bool SML) \ |
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35 | : CognitiveEngine(serverName, serverPort, numFields, SML) |
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36 | { |
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37 | BuildCognitiveEngine(); |
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38 | } |
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39 | |
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40 | |
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41 | Parameter* |
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42 | CBR_CE::GetSolution(Observable *observables, Parameter *currentParameters, Utility *utilities) |
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43 | { |
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44 | LOG("Cognitive Engine:: Generating solution.\n"); |
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45 | |
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46 | string searchNames[radioInfo->numUtilities]; |
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47 | |
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48 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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49 | searchNames[i] = uList[i].name; |
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50 | } |
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51 | |
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52 | float searchVals[radioInfo->numUtilities]; |
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53 | |
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54 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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55 | searchVals[i] = uList[i].target; |
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56 | } |
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57 | |
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58 | uint32_t numberColumns = radioInfo->numParameters + radioInfo->numUtilities + radioInfo->numObservables + 1; |
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59 | |
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60 | float returnValues[numberColumns]; |
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61 | |
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62 | int searchOps[radioInfo->numUtilities]; |
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63 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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64 | |
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65 | /* If the goal is to maximum, set the search operation to |
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66 | * return values greater than the target. |
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67 | * |
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68 | * If the goal is to minimize, set the search operation to |
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69 | * return values less than the target. |
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70 | * |
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71 | * NOTE: the values '2' and '4' here are from some old preprocesser |
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72 | * definitions, which I will copy here until I can figure out just what |
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73 | * exactly they were for: |
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74 | 42 #define EQ 0 // equals |
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75 | 43 #define NE 1 // not equals |
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76 | 44 #define GT 2 // greater than |
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77 | 45 #define GE 3 // greater than or equal to |
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78 | 46 #define LT 4 // less than |
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79 | 47 #define LE 5 // less than or equal to |
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80 | */ |
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81 | if(strcmp(uList[i].goal.c_str(), "max") == 0) { |
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82 | searchOps[i] = 2; |
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83 | } else if(strcmp(uList[i].goal.c_str(), "min") == 0) { |
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84 | searchOps[i] = 4; |
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85 | } |
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86 | } |
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87 | |
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88 | /* CBR specific call */ |
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89 | uint32_t rc = myCBR1->Search(searchNames, searchOps, searchVals, |
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90 | radioInfo->numUtilities, returnValues); |
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91 | |
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92 | if(rc == 0){ |
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93 | /* Adapt the returned parameters to meet the objective */ |
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94 | LOG("Cognitive Engine:: Found\n"); |
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95 | |
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96 | FineTune(); |
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97 | |
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98 | } else if(rc == 31337) { |
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99 | LOG("Cognitive Engine:: Not Found.\n"); |
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100 | /* No rows in the CBR, pick default parameters */ |
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101 | /* Currently this is hard coded and implementation specific! */ |
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102 | |
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103 | int Pt = optList->Ptune; |
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104 | // helps to cycle from on parameter to another.. |
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105 | |
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106 | for (int i = 0; i < radioInfo->numParameters; i++) { |
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107 | returnValues[i] = currentParameters[i].value; |
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108 | } |
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109 | |
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110 | returnValues[Pt] = currentParameters[Pt].value + pList[Pt].step*(optList->Slope[Pt]); |
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111 | |
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112 | //////////////////// LIMITER ///////////////////////////// |
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113 | if (returnValues[Pt] > pList[Pt].max) { |
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114 | std::cout << "SORRY CANT EXCEED MAX VALUE" << std::endl; |
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115 | returnValues[Pt] = returnValues[Pt] - pList[Pt].step; |
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116 | optList->Ptune += 1; |
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117 | } |
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118 | if (returnValues[Pt] < pList[Pt].min) { |
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119 | std::cout << "SORRY CANT GO BELOW MIN VALUE" << std::endl; |
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120 | returnValues[Pt] = returnValues[Pt] + pList[Pt].step ; |
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121 | optList->Ptune += 1; |
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122 | } |
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123 | |
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124 | if (optList->Ptune > radioInfo->numParameters) { |
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125 | optList->Ptune = 0; |
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126 | } |
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127 | ///////////////////////////////////////////////////////////// |
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128 | |
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129 | |
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130 | for (int i = 0; i < radioInfo->numUtilities; i++) { |
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131 | returnValues[radioInfo->numParameters + i] = uList[i].value; |
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132 | } |
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133 | |
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134 | for (int i = 0; i < radioInfo->numObservables; i++) { |
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135 | returnValues[radioInfo->numParameters + radioInfo->numUtilities + i] = oList[i].value; |
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136 | } |
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137 | |
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138 | size_t returnValueIndex = 0; |
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139 | for(size_t i = 0; i < radioInfo->numParameters; i++) { |
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140 | pList[i].value = returnValues[returnValueIndex]; |
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141 | returnValueIndex++; |
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142 | } |
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143 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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144 | uList[i].value = returnValues[returnValueIndex]; |
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145 | returnValueIndex++; |
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146 | } |
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147 | for(size_t i = 0; i < radioInfo->numObservables; i++) { |
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148 | oList[i].value = returnValues[returnValueIndex]; |
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149 | returnValueIndex++; |
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150 | } |
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151 | returnValues[returnValueIndex] = 0; |
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152 | |
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153 | string allNames[numberColumns]; |
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154 | size_t allNameIndex = 0; |
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155 | for(size_t i = 0; i < radioInfo->numParameters; i++) { |
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156 | allNames[allNameIndex] = pList[i].name; |
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157 | allNameIndex++; |
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158 | } |
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159 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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160 | allNames[allNameIndex] = uList[i].name; |
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161 | allNameIndex++; |
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162 | } |
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163 | for(size_t i = 0; i < radioInfo->numObservables; i++) { |
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164 | allNames[allNameIndex] = oList[i].name; |
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165 | allNameIndex++; |
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166 | } |
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167 | allNames[allNameIndex] = "TotalWeight"; |
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168 | |
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169 | // Add row to CBR. |
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170 | myCBR1->AddRow(allNames, returnValues, returnValueIndex + 1); |
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171 | myCBR2->AddRow(allNames, returnValues, returnValueIndex + 1); |
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172 | } else { |
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173 | LOG("Cognitive Engine:: Search return an invalid value.\n"); |
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174 | } |
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175 | |
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176 | return pList; |
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177 | } |
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178 | |
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179 | |
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180 | void |
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181 | CBR_CE::ReceiveFeedback(Observable *observables, Parameter *parameters, Utility *utilities) |
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182 | { |
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183 | LOG("Cognitive Engine:: Receiving feedback.\n"); |
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184 | |
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185 | uint32_t numberColumns = radioInfo->numParameters + radioInfo->numUtilities + radioInfo->numObservables + 1; |
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186 | |
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187 | uint32_t whereLen = radioInfo->numParameters; |
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188 | uint32_t setLen = radioInfo->numUtilities + radioInfo->numObservables + 1; |
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189 | |
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190 | |
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191 | float whereValue[whereLen]; |
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192 | float setValue[setLen]; |
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193 | string whereList[whereLen]; |
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194 | string setList[setLen]; |
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195 | |
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196 | |
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197 | // Calculating total weight |
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198 | float TotalWeight = 0; |
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199 | int Penalty = 100; |
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200 | |
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201 | for(size_t i = 0; i < radioInfo->numParameters; i++) { |
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202 | whereList[i] = parameters[i].name; |
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203 | whereValue[i] = parameters[i].value; |
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204 | TotalWeight += parameters[i].value*(optList->Pweights[i]); |
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205 | } |
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206 | |
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207 | size_t returnValueIndex = 0; |
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208 | for(size_t i = 0; i < radioInfo->numUtilities; i++) { |
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209 | setList[returnValueIndex] = utilities[i].name; |
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210 | setValue[returnValueIndex] = utilities[i].value; |
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211 | if ((utilities[i].value > uList[i].target && uList[i].goal == "max") || (utilities[i].value < uList[i].target && uList[i].goal == "min")) |
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212 | TotalWeight += abs(utilities[i].value - uList[i].target)*(optList->Uweights[i]); |
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213 | else |
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214 | TotalWeight += abs(utilities[i].value - uList[i].target)*(optList->Uweights[i])*Penalty; |
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215 | returnValueIndex++; |
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216 | } |
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217 | for(size_t i = 0; i < radioInfo->numObservables; i++) { |
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218 | setList[returnValueIndex] = observables[i].name; |
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219 | setValue[returnValueIndex] = observables[i].value; |
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220 | returnValueIndex++; |
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221 | } |
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222 | setList[returnValueIndex] = "TotalWeight"; |
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223 | setValue[returnValueIndex] = TotalWeight; |
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224 | ///// |
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225 | |
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226 | myCBR1->Update(whereList,setList,whereValue,setValue,whereLen,setLen); |
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227 | |
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228 | // MAIN SELF LEARNING CODE HERE // |
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229 | |
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230 | int searchOps[radioInfo->numParameters]; |
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231 | string searchNames[radioInfo->numParameters]; |
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232 | float searchVals[radioInfo->numParameters]; |
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233 | float returnValues[numberColumns]; |
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234 | |
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235 | |
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236 | for (int L = 0; L < radioInfo->numParameters ; L++) { |
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237 | searchOps[L] = 0; |
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238 | searchNames[L] = parameters[L].name; |
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239 | searchVals[L] = parameters[L].value; |
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240 | } |
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241 | |
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242 | |
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243 | for (int lp = 0; lp < radioInfo->numParameters; lp++ ) { |
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244 | |
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245 | searchOps[lp] = (optList->Slope[lp] == -1)?2:4; |
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246 | |
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247 | uint32_t rc = myCBR1->Search(searchNames, searchOps, searchVals,radioInfo->numParameters, returnValues); |
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248 | if(rc == 0) { |
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249 | std::cout << "case found for learning for parameter : " << lp << std::endl; |
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250 | |
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251 | /////////// |
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252 | |
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253 | std::cout << "CASE STUDY" << std::endl; |
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254 | std::cout << "returnvalue ber " << returnValues[radioInfo->numParameters] << std::endl; |
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255 | std::cout << "BER current value " << utilities[0].value << std::endl; |
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256 | |
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257 | |
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258 | |
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259 | ///////// |
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260 | |
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261 | for (int ul = 0; ul < radioInfo->numUtilities; ul++) { |
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262 | int rl = radioInfo->numParameters + ul; |
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263 | if( abs(1 - returnValues[rl]/utilities[ul].value) > optList->PoC ) { |
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264 | if(optList->Trend[lp][ul] == 0.0) { |
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265 | |
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266 | if ((returnValues[rl] > utilities[ul].value) && optList->Status[lp][ul] >= 0 ) { |
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267 | optList->Status[lp][ul] += 1; |
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268 | } |
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269 | else if ( ((returnValues[rl]) < utilities[ul].value) && optList->Status[lp][ul] <= 0) { |
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270 | optList->Status[lp][ul] -= 1; |
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271 | } |
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272 | else { |
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273 | optList->Status[lp][ul] = 0; |
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274 | } |
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275 | |
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276 | if (abs(optList->Status[lp][ul]) > 2) { |
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277 | optList->Trend[lp][ul] = signof(optList->Status[lp][ul]); |
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278 | } |
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279 | } |
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280 | else if ( optList->Trend[lp][ul] == 1 && (returnValues[rl] > utilities[ul].value) && optList->Status[lp][ul] >= 0 ) { |
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281 | optList->Status[lp][ul] += 1; |
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282 | } |
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283 | else if ( optList->Trend[lp][ul] == -1 && (returnValues[rl] > utilities[ul].value) && optList->Status[lp][ul] <= 0) { |
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284 | optList->Status[lp][ul] -= 1; |
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285 | } |
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286 | else { |
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287 | optList->Status[lp][ul] = 0; |
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288 | optList->Trend[lp][ul] = 0; |
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289 | } |
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290 | |
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291 | |
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292 | |
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293 | } |
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294 | } |
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295 | } |
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296 | else if (rc == 31337) { |
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297 | std::cout << "No case found for parameter: " << lp << std::endl; |
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298 | } |
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299 | searchOps[lp] = 0; |
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300 | |
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301 | |
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302 | } |
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303 | |
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304 | |
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305 | // updating slope matrix.. |
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306 | // AS OF NOW VALID ONLY FOR ONE UTILITY |
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307 | for (int i = 0; i < radioInfo->numParameters; i++) { |
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308 | if ( (uList[0].goal == "min" && optList->Trend[i][0] < 0) || (uList[0].goal == "max" && optList->Trend[i][0] > 0) ) { |
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309 | optList->Slope[i] = -1; |
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310 | } |
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311 | else if ( (uList[0].goal == "min" && optList->Trend[i][0] >= 0) || (uList[0].goal == "max" && optList->Trend[i][0] <= 0) ) { |
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312 | optList->Slope[i] = 1; |
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313 | } |
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314 | } |
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315 | |
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316 | std::cout << "Ptune " << optList->Ptune << std::endl; |
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317 | std::cout << "Status1 " << optList->Status[0][0] << std::endl; |
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318 | std::cout << "Status2 " << optList->Status[1][0] << std::endl; |
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319 | std::cout << "Slope1 " << optList->Slope[0] << std::endl; |
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320 | std::cout << "Slope2 " << optList->Slope[1] << std::endl; |
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321 | std::cout << "Trend1 " << optList->Trend[0][0] << std::endl; |
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322 | std::cout << "Trend2 " << optList->Trend[1][0] << std::endl; |
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323 | |
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324 | /// end of MAIN CODE // |
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325 | |
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326 | |
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327 | } |
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328 | |
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329 | void |
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330 | CBR_CE::BuildCognitiveEngine() |
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331 | { |
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332 | string filename = "exdb"; |
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333 | string tablename1 = "data1"; |
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334 | string tablename2 = "data2"; |
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335 | |
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336 | //// NEW SET OF VARIABLES /// |
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337 | |
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338 | optList->Uweights = new float[radioInfo->numUtilities]; |
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339 | optList->Pweights = new float[radioInfo->numParameters]; |
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340 | optList->Slope = new int[radioInfo->numParameters]; |
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341 | |
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342 | ///// we have to assume 10 utilities maxxx!!!! VERY important |
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343 | |
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344 | optList->Status = new float[radioInfo->numParameters][10]; |
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345 | optList->Trend = new float[radioInfo->numParameters][10]; |
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346 | ////////////////////////////////////////////////////////////// |
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347 | |
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348 | |
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349 | ////////////initializing Opt_List members here///// |
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350 | |
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351 | optList->PoC = 0.01; |
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352 | optList->Ptune = 0; // starting with most tunable parameter.. (widest range .. ) |
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353 | |
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354 | for (int x = 0; x < radioInfo->numParameters; x++) { |
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355 | optList->Pweights[x] = 1/(pList[x].step); |
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356 | optList->Slope[x] = 1; |
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357 | } |
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358 | |
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359 | |
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360 | |
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361 | for (size_t i = 0; i < radioInfo->numUtilities; i++) { |
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362 | optList->Uweights[i] = 10; |
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363 | } |
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364 | |
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365 | |
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366 | for (size_t i = 0; i < radioInfo->numParameters; i++) { |
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367 | for (size_t k = 0; k < radioInfo->numUtilities; k++) { |
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368 | optList->Status[i][k] = 0; |
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369 | optList->Trend[i][k] = 0; |
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370 | } |
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371 | } |
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372 | //////////////////////////////////////////////////////////////////////// |
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373 | |
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374 | |
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375 | |
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376 | |
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377 | uint32_t numberColumns = radioInfo->numParameters + radioInfo->numUtilities \ |
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378 | + radioInfo->numObservables + 1; |
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379 | |
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380 | string cols[numberColumns]; |
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381 | size_t columnIndex = 0; |
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382 | |
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383 | |
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384 | for (size_t i = 0; i < radioInfo->numParameters; i++){ |
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385 | cols[columnIndex] = pList[i].name; |
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386 | columnIndex++; |
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387 | } |
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388 | for (size_t i = 0; i < radioInfo->numUtilities; i++){ |
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389 | cols[columnIndex] = uList[i].name; |
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390 | columnIndex++; |
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391 | } |
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392 | for (size_t i = 0; i < radioInfo->numObservables; i++){ |
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393 | cols[columnIndex] = oList[i].name; |
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394 | columnIndex++; |
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395 | } |
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396 | cols[columnIndex] = "TotalWeight"; |
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397 | |
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398 | myCBR1 = new CBR(filename, tablename1, cols, numberColumns); |
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399 | |
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400 | myCBR2 = new CBR(filename, tablename2, cols, numberColumns); |
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401 | |
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402 | |
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403 | } |
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404 | |
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405 | |
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406 | void |
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407 | CBR_CE::PerformUpdatePerformance() |
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408 | { |
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409 | |
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410 | /* Receive Set of current Parameters */ |
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411 | char buffer[256]; |
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412 | memset(buffer, 0, 256); |
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413 | ReadMessage(commandSocketFD, buffer); |
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414 | uint32_t numParameters = atoi(buffer); |
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415 | |
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416 | Parameter *p = new Parameter[numParameters]; |
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417 | |
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418 | for(size_t i = 0; i < numParameters; i++) { |
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419 | memset(buffer, 0, 256); |
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420 | ReadMessage(commandSocketFD, buffer); |
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421 | p[i].name = std::string(buffer); |
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422 | |
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423 | memset(buffer, 0, 256); |
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424 | ReadMessage(commandSocketFD, buffer); |
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425 | p[i].value = atof(buffer); |
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426 | } |
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427 | |
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428 | |
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429 | /* Receive Set of Observables */ |
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430 | memset(buffer, 0, 256); |
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431 | ReadMessage(commandSocketFD, buffer); |
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432 | uint32_t numObservables = atoi(buffer); |
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433 | |
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434 | Observable *o = new Observable[numObservables]; |
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435 | |
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436 | for(size_t i = 0; i < numObservables; i++) { |
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437 | memset(buffer, 0, 256); |
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438 | ReadMessage(commandSocketFD, buffer); |
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439 | o[i].name = std::string(buffer); |
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440 | |
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441 | memset(buffer, 0, 256); |
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442 | ReadMessage(commandSocketFD, buffer); |
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443 | o[i].value = atof(buffer); |
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444 | } |
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445 | |
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446 | |
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447 | /* Receive Set of Utilities */ |
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448 | memset(buffer, 0, 256); |
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449 | ReadMessage(commandSocketFD, buffer); |
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450 | uint32_t numUtilities = atoi(buffer); |
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451 | |
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452 | Utility *u = new Utility[numUtilities]; |
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453 | |
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454 | for(size_t i = 0; i < numUtilities; i++) { |
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455 | memset(buffer, 0, 256); |
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456 | ReadMessage(commandSocketFD, buffer); |
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457 | u[i].name = std::string(buffer); |
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458 | |
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459 | memset(buffer, 0, 256); |
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460 | ReadMessage(commandSocketFD, buffer); |
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461 | u[i].value = atof(buffer); |
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462 | } |
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463 | |
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464 | ReceiveFeedback(o, p, u); |
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465 | |
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466 | delete [] o; |
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467 | delete [] p; |
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468 | delete [] u; |
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469 | } |
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470 | |
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471 | |
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472 | void |
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473 | CBR_CE::PerformRequestOptimization() |
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474 | { |
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475 | /* Receive Set of Observables */ |
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476 | LOG("\nCognitive Engine:: Receiving Observables\n"); |
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477 | |
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478 | char buffer[256]; |
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479 | memset(buffer, 0, 256); |
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480 | ReadMessage(commandSocketFD,buffer); |
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481 | uint32_t numObservables = atoi(buffer); |
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482 | |
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483 | Observable *o = new Observable[numObservables]; |
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484 | |
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485 | for(size_t i = 0; i < numObservables; i++) { |
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486 | memset(buffer, 0, 256); |
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487 | ReadMessage(commandSocketFD, buffer); |
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488 | o[i].name = std::string(buffer); |
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489 | |
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490 | memset(buffer, 0, 256); |
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491 | ReadMessage(commandSocketFD, buffer); |
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492 | o[i].value = atof(buffer); |
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493 | } |
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494 | |
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495 | /* Receive Set of current Parameters */ |
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496 | LOG("Cognitive Engine:: Receiving Current Transmission Parameters\n"); |
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497 | |
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498 | memset(buffer, 0, 256); |
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499 | ReadMessage(commandSocketFD, buffer); |
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500 | uint32_t numCurrentParameters = atoi(buffer); |
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501 | |
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502 | Parameter *cp = new Parameter[numCurrentParameters]; |
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503 | |
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504 | for(size_t i = 0; i < numCurrentParameters; i++) { |
---|
505 | memset(buffer, 0, 256); |
---|
506 | ReadMessage(commandSocketFD, buffer); |
---|
507 | cp[i].name = std::string(buffer); |
---|
508 | |
---|
509 | memset(buffer, 0, 256); |
---|
510 | ReadMessage(commandSocketFD, buffer); |
---|
511 | cp[i].value = atof(buffer); |
---|
512 | } |
---|
513 | |
---|
514 | /* Receive Set of Utilities */ |
---|
515 | LOG("Cognitive Engine:: Receiving Utilities\n"); |
---|
516 | |
---|
517 | memset(buffer, 0, 256); |
---|
518 | ReadMessage(commandSocketFD, buffer); |
---|
519 | uint32_t numUtilities = atoi(buffer); |
---|
520 | |
---|
521 | Utility *u = new Utility[numUtilities]; |
---|
522 | |
---|
523 | for(size_t i = 0; i < numUtilities; i++) { |
---|
524 | memset(buffer, 0, 256); |
---|
525 | ReadMessage(commandSocketFD, buffer); |
---|
526 | u[i].name = std::string(buffer); |
---|
527 | |
---|
528 | memset(buffer, 0, 256); |
---|
529 | ReadMessage(commandSocketFD, buffer); |
---|
530 | u[i].value = atof(buffer); |
---|
531 | } |
---|
532 | |
---|
533 | |
---|
534 | |
---|
535 | |
---|
536 | LOG("Cognitive Engine:: Processing parameters....\n"); |
---|
537 | |
---|
538 | Parameter *solutionSet; |
---|
539 | |
---|
540 | solutionSet = GetSolution(o,cp,u); |
---|
541 | |
---|
542 | |
---|
543 | |
---|
544 | LOG("Cognitive Engine:: Sending Optimal Parameters to Application.\n"); |
---|
545 | char numParametersChar[10]; |
---|
546 | char solutionValue[50]; |
---|
547 | sprintf(numParametersChar, "%i", radioInfo->numParameters); |
---|
548 | SendMessage(commandSocketFD, numParametersChar); |
---|
549 | for(size_t i = 0; i < radioInfo->numParameters; i++) { |
---|
550 | SendMessage(commandSocketFD, solutionSet[i].name.c_str()); |
---|
551 | memset(solutionValue, 0, 50); |
---|
552 | sprintf(solutionValue, "%f", solutionSet[i].value); |
---|
553 | SendMessage(commandSocketFD, solutionValue); |
---|
554 | } |
---|
555 | |
---|
556 | delete [] o; |
---|
557 | delete [] cp; |
---|
558 | delete [] u; |
---|
559 | } |
---|
560 | |
---|
561 | |
---|
562 | void |
---|
563 | CBR_CE::PerformResetEngineCognitive() |
---|
564 | { |
---|
565 | Reset(); |
---|
566 | } |
---|
567 | |
---|
568 | |
---|
569 | void |
---|
570 | CBR_CE::PerformShutdownEngineCognitive() |
---|
571 | { |
---|
572 | Shutdown(); |
---|
573 | } |
---|
574 | |
---|
575 | void |
---|
576 | CBR_CE::FineTune() |
---|
577 | { |
---|
578 | |
---|
579 | std::cout << "UNDER DEVELOPMENT" << std::endl; |
---|
580 | |
---|
581 | } |
---|