Research Article
Empirical Study of Homogeneous and Heterogeneous Ensemble Models for Software Development Effort Estimation
Table 2
Investigated homogeneous and heterogeneous ensemble models.
| Ensemble type |
Base learner(s) |
Combination type | Combination rule | Abbreviation |
|
Homogeneous | MLP | Linear | Averaging | HM-MLP-[Avg] | Weighted averaging | HM-MLP-[WtAvg] | Nonlinear | MLP | HM-MLP-[MLP] | SVR | HM-MLP-[SVR] | FIS-FCM | HM-MLP-[FIS-FCM] | FIS-SC | HM-MLP-[FIS-SC] | ANFIS-FCM | HM-MLP-[ANFIS-FCM] | ANFIS-SC | HM-MLP-[ANFIS-SC] | SVR | Linear | Averaging | HM-SVR-[Avg] | Weighted averaging | HM-SVR-[WtAvg] | Nonlinear | MLP | HM-SVR-[MLP] | SVR | HM-SVR-[SVR] | FIS-FCM | HM-SVR-[FIS-FCM] | FIS-SC | HM-SVR-[FIS-SC] | ANFIS-FCM | HM-SVR-[ANFIS-FCM] | ANFIS-SC | HM-SVR-[ANFIS-SC] |
ANFIS | Linear | Averaging | HM-ANFIS-[Avg] | Weighted averaging | HM-ANFIS-[WtAvg] | Nonlinear | MLP | HM-ANFIS-[MLP] | SVR | HM-ANFIS-[SVR] | FIS-FCM | HM-ANFIS-[FIS-FCM] | FIS-SC | HM-ANFIS-[FIS-SC] | ANFIS-FCM | HM-ANFIS-[ANFIS-FCM] | ANFIS-SC | HM-ANFIS-[ANFIS-SC] |
| Heterogeneous | MLP, SVR, and ANFIS | Linear | Averaging | HT-(MLP, SVR, ANFIS)-[Avg] | Weighted averaging | HT-(MLP, SVR, ANFIS)-[WtAvg] | Nonlinear | MLP | HT-(MLP, SVR, ANFIS)-[MLP] | SVR | HT-(MLP, SVR, ANFIS)-[SVR] | FIS-FCM | HT-(MLP, SVR, ANFIS)-[FIS-FCM] | FIS-SC | HT-(MLP, SVR, ANFIS)-[FIS-SC] | ANFIS-FCM | HT-(MLP, SVR, ANFIS)-[ANFIS-FCM] | ANFIS-SC | HT-(MLP, SVR, ANFIS)-[ANFIS-SC] |
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