Research Article
Multiobjective Personalized Recommendation Algorithm Using Extreme Point Guided Evolutionary Computation
Table 4
HV comparison results of MOEA-EPG and other algorithms on all the objectives for eight data sets.
| | Data sets | Test Instance | MOEA-ProbS | PMOEA-ProbS | PMOEA-CF | MOEA-EPG |
| | Movielens 1 | Accuracy-coverage | 1.443 1.38e-02 | 1.533 1.13e-02 | 1.368 1.36e-02 | 3.202 7.74e-02 | | Accuracy-novelty | 11.40 1.45e-01 | 9.667 1.16e-01 | 9.288 1.07e-01 | 36.89 6.05e-02 | | Accuracy-coverage-novelty | 5.504 1.06e-01 | 5.319 1.13e-01 | 4.818 9.50e-02 | 12.23 5.34e-01 |
| | Movielens 2 | Accuracy-coverage | 1.531 1.03e-02 | 1.192 1.83e-02 | 1.085 1.68e-02 | 4.677 3.46e-02 | | Accuracy-novelty | 10.96 1.12e-01 | 9.288 1.23e-01 | 8.819 1.34e-01 | 35.43 7.83e-02 | | Accuracy-coverage-novelty | 6.027 1.23e-01 | 5.494 1.43e-01 | 4.494 5.33e-02 | 21.28 2.74e-01 |
| | Movielens 3 | Accuracy-coverage | 1.543 1.36e-02 | 1.290 1.49e-02 | 1.030 1.34e-02 | 3.343 1.07e-02 | | Accuracy-novelty | 11.21 1.07e-01 | 9.218 2.15e-01 | 9.143 2.57e-01 | 36.10 7.62e-02 | | Accuracy-coverage-novelty | 5.770 9.50e-02 | 5.086 3.23e-01 | 4.833 5.46e-02 | 14.05 3.52e-01 |
| | Movielens 4 | Accuracy-coverage | 1.763 1.15e-02 | 1.180 1.13e-02 | 1.123 3.87e-02 | 6.385 5.62e-02 | | Accuracy-novelty | 13.90 1.66e-01 | 9.271 1.11e-01 | 9.332 1.76e-01 | 38.24 1.22e-02 | | Accuracy-coverage-novelty | 6.008 1.02e-01 | 5.332 1.13e-01 | 4.210 6.27e-02 | 18.68 3.25e-01 |
| | Netflix 1 | Accuracy-coverage | 1.848 6.54e-02 | 1.548 4.91e-02 | 1.174 5.34e-02 | 2.877 7.49e-02 | | Accuracy-novelty | 12.69 5.56e-03 | 10.34 4.72e-02 | 9.375 1.99e-02 | 30.44 2.40e-02 | | Accuracy-coverage-novelty | 6.972 3.08e-02 | 5.554 1.15e-02 | 4.307 4.22e-02 | 10.41 2.97e-02 |
| | Netflix 2 | Accuracy-coverage | 1.652 9.08e-02 | 1.359 1.02e-02 | 1.183 2.20e-02 | 6.914 5.29e-02 | | Accuracy-novelty | 12.82 6.54e-02 | 10.48 1.49e-02 | 8.576 6.76e-03 | 31.96 1.22e-02 | | Accuracy-coverage-novelty | 7.917 4.27e-02 | 6.547 5.40e-02 | 4.251 6.27e-02 | 12.10 6.57e-03 |
| | Netflix 3 | Accuracy-coverage | 1.763 3.27e-02 | 1.475 4.99e-02 | 1.146 4.48e-02 | 5.082 3.62e-02 | | Accuracy-novelty | 13.71 3.94e-03 | 9.692 2.13e-02 | 8.446 2.48e-02 | 29.65 8.97e-03 | | Accuracy-coverage-novelty | 7.330 4.14e-02 | 6.368 2.16e-03 | 4.302 2.49e-02 | 13.27 3.25e-01 |
| | Netflix 4 | Accuracy-coverage | 1.440 4.36e-02 | 1.252 1.13e-02 | 1.018 3.87e-02 | 1.975 1.05e-02 | | Accuracy-novelty | 12.63 3.34e-04 | 9.271 1.87e-02 | 7.659 1.92e-02 | 28.25 6.08e-02 | | Accuracy-coverage-novelty | 6.358 5.99e-02 | 5.630 4.97e-02 | 4.423 6.92e-02 | 11.92 3.25e-02 |
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