Research Article
Quality Prediction of Web Services Based on a Covering Algorithm
Table 1
Comparison of MAE and RMSE on the WS-Dream dataset (λ = 0.6, k = 2).
| Quality dimension | Method | MAE | RMSE | Matrix density | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 | Avg | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 | Avg |
| RT | UPCC | 0.518 | 0.509 | 0.497 | 0.484 | 0.478 | 0.497 | 1.445 | 1.421 | 1.405 | 1.391 | 1.381 | 1.409 | IPCC | 0.580 | 0.516 | 0.480 | 0.457 | 0.443 | 0.495 | 1.472 | 1.394 | 1.355 | 1.328 | 1.308 | 1.371 | UIPCC | 0.495 | 0.469 | 0.452 | 0.438 | 0.429 | 0.457 | 1.347 | 1.306 | 1.286 | 1.272 | 1.253 | 1.293 | UCAPK | 0.503 | 0.482 | 0.458 | 0436 | 0.419 | 0.459 | 1.368 | 1.263 | 1.192 | 1.161 | 1.134 | 1.223 | ICAPK | 0.534 | 0.515 | 0498 | 0.471 | 0.446 | 0.492 | 1.471 | 1.378 | 1.321 | 1.252 | 1.186 | 1.321 | UICAPK | 0.482 | 0.469 | 0.451 | 0.432 | 0.415 | 0.449 | 1.31 | 1.261 | 1.227 | 1.204 | 1.188 | 1.239 | TOSEM | 0.489 | 0.472 | 0.456 | 0.439 | 0.429 | 0.456 | 1.353 | 1.323 | 1.293 | 1.261 | 1.249 | 1.296 | NIMF | 0.454 | 0.437 | 0.421 | 0.412 | 0.402 | 0.425 | 1.151 | 1.123 | 1.104 | 1.087 | 1.077 | 1.108 | UQPCA | 0.395 | 0.386 | 0.379 | 0.371 | 0.366 | 0.379 | 1.329 | 1.311 | 1.305 | 1.285 | 1.272 | 1.299 | IQPCA | 0.404 | 0.396 | 0.389 | 0.381 | 0.373 | 0.388 | 1.236 | 1.227 | 1.225 | 1.205 | 1.179 | 1.214 | UIQPCA | 0.368 | 0.358 | 0.354 | 0.345 | 0.341 | 0.353 | 1.221 | 1.205 | 1.201 | 1.181 | 1.161 | 1.193 |
| TP | UPCC | 20.646 | 19.057 | 18.531 | 17.768 | 17.156 | 18.632 | 63.459 | 60.902 | 60.486 | 59.159 | 58.103 | 60.422 | IPCC | 30.322 | 28.150 | 26.825 | 25.427 | 24.246 | 26.994 | 72.673 | 69.847 | 68.307 | 65.870 | 64.148 | 68.169 | UIPCC | 23.394 | 21.618 | 20.740 | 19.766 | 19.918 | 21.087 | 64.528 | 61.729 | 60.696 | 58.874 | 57.524 | 60.670 | UCAPK | 18.123 | 17.735 | 16.494 | 16.325 | 16.069 | 16.949 | 60.530 | 59.474 | 58.823 | 58.243 | 58.118 | 59.037 | ICAPK | 25.095 | 24.893 | 24.417 | 23.564 | 22.857 | 24.165 | 72.031 | 69.807 | 67.293 | 62.451 | 60.738 | 66.464 | UICAPK | 17.065 | 16.785 | 15.706 | 14.729 | 14.401 | 15.737 | 56.593 | 56.168 | 55.895 | 55.545 | 55.203 | 55.881 | TOSEM | 22.651 | 20.643 | 19.243 | 18.534 | 17.645 | 19.743 | 65.341 | 62.625 | 60.330 | 59.958 | 58.027 | 61.256 | NIMF | 14.494 | 13.688 | 13.346 | 12.923 | 12.589 | 13.408 | 41.414 | 39.325 | 38.524 | 37.744 | 36.542 | 38.709 | UQPCA | 14.483 | 13.809 | 13.467 | 13.065 | 12.732 | 13.511 | 48.519 | 46.779 | 46.178 | 45.201 | 44.308 | 46.197 | IQPCA | 18.475 | 17.759 | 17.357 | 16.887 | 16.646 | 17.424 | 48.561 | 46.948 | 45.848 | 44.984 | 44.191 | 46.106 | UIQPCA | 13.727 | 13.138 | 12.861 | 12.503 | 12.261 | 12.898 | 42.895 | 41.492 | 40.805 | 40.052 | 39.256 | 40.9 |
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